SLTS241A FEBRUARY 2005 REVISED JULY 2007 8-A, 3.3-V INPUT NONISOL
|
|
|
Top Searches for this datasheet
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
8-A, 3.3-V INPUT NONISOLATED WIDE-OUTPUT ADJUST MODULE
FEATURES
Output Current 3.3-V Input Wide-Output Voltage Adjust (0.8 Efficiencies On/Off Inhibit Prebias Start-Up Undervoltage Lockout Auto-TrackSequencing Output Overcurrent Protection (Nonlatching, Auto-Reset) Operating Temperature: -40°C 85°C Safety Agency Approvals: UL/IEC/CSA-22.2 60950-1 POLACompatible
APPLICATIONS
Multivoltage Digital Systems High-Density Logic Circuits High-End Computers Servers 3.3-V Intermediate Architectures
DESCRIPTION
PTV03010W ready-to-use nonisolated power module, part class complete dc/dc switching regulators from Texas Instruments. These regulators combine high performance with double-sided, surface-mount construction, give designers flexibility power most complex multiprocessor digital systems using off-the-shelf catalog parts. PTV03010W series produced 8-pin, single in-line (SIP) package. footprint minimizes board space, offers alternate package option space conscious applications. Operating from 3.3-V input bus, series provides step-down conversion wide range output voltages, output current. output voltage value over range, output voltage using single external resistor. This series includes Auto-TrackTM. Auto-Tracksimplifies task supply-voltage sequencing power system enabling output voltage multiple modules accurately track each other, external voltage, during power power down. Other operating features include on/off inhibit, ability start into existing output voltage prebias. nonlatching overcurrent trip protects against load faults. Target applications include complex multivoltage, multiprocessor systems that incorporate industry's high-speed microprocessors, drivers, TMS320DSP family.
Please aware that important notice concerning availability, standard warranty, critical applications Texas Instruments semiconductor products disclaimers thereto appears this data sheet. POLA, Auto-Track, TMS320 trademarks Texas Instruments.
PRODUCTION DATA information current publication date. Products conform specifications terms Texas Instruments standard warranty. Production processing does necessarily include testing parameters.
Copyright 2005-2007, Texas Instruments Incorporated
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
STANDARD APPLICATION
Track Track Inhibit (Required) Inhibit
Application Information section capacitor recommendations.
required adjust output voltage higher than lowest value. Application Information section values.
PTV03010
VOAdj
Ceramic (Required)
RSET# 0.05 (Required)
(Optional)
Ceramic (Optional)
ORDERING INFORMATION
PTV03010 (Basic Model) Output Voltage Range (Adjustable) Part Number PTV03010WAH DESCRIPTION Vertical free RoHS Mechanical Package
applicable package drawing dimensions board layout. Lead (Pb) free specifies Sn/Ag solder material.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted
UNIT V(Track) Tstg V(INH) Track input voltage Operating temperature range Lead temperature Storage temperature Inhibit input voltage Over range seconds -0.3 +0.3 -40°C 85°C 260°C
-55°C 125°C -0.3
Stresses beyond those listed under absolute maximum ratings cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under recommended operating conditions implied. Exposure absolute-maximum-rated conditions extended periods affect device reliability. This product compatible with surface-mount reflow solder processes.
PACKAGE SPECIFICATIONS
PTV03010W (Suffix Weight Flammability Mechanical shock Mechanical vibration Qualification limit. Meets Mil-STD-883D, Method 2002.3, sine, mounted Mil-STD-883D, Method 2007.2, 2000
grams
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
ELECTRICAL CHARACTERISTICS
operating free-air temperature, (unless otherwise noted)
PARAMETER Output current Input voltage range Set-point voltage tolerance Temperature variation Line regulation Load regulation Total output variation Adjust range -40°C 85°C Over range Over range Includes set-point, line, load, -40°C 85°C Over range RSET 2.21 RSET 5.49 Efficiency RSET 8.87 RSET 17.4 RSET 36.5 Output voltage ripple (pk-pk) (trip) Overcurrent threshold 20-MHz bandwidth Reset, followed auto-recovery 1-A/s load step, 100% max, Transient response Recovery time over/undershoot Track control (pin Input current Control slew-rate limit increasing decreasing Input high voltage Inhibit control (pin Input voltage Input current (stby) Input standby current Switching frequency External input capacitance Over ranges Nonceramic (C1) Ceramic (C2) Capacitance value Equivalent series resistance (nonceramic) MTBF Reliability Telcordia SR-332, stress, 40°C, ground benign Nonceramic Ceramic Referenced -0.2 0.24
TEST CONDITIONS Natural convection airflow Over load range
2.95
±0.5
UNIT
3.65
mVPP
-0.13 2.45 Open
V/ms
(max)
UVLO
Undervoltage lockout
Inhibit (pin GND, Track (pin open
11,000
External output capacitance (C3)
thermal derating curves safe operating area (SOA), consult factory appropriate derating. set-point voltage tolerance affected tolerance stability RSET. stated limit unconditionally RSET tolerance with ppm/°C better temperature stability. This control internally pulled input voltage, this input left open-circuit, module operates when input power applied. small low-leakage MOSFET recommended control. further information, related application note. 10-µF high-frequency ceramic capacitor 100-µF electrolytic input capacitor required proper operation. electrolytic capacitor must rated mArms minimum ripple current. Application Information further guidance capacitor selection. external output capacitor required basic operation. Adding distributed capacitance load improves transient response. This calculated maximum. minimum limitation often results lower value. When controlling Track using voltage supervisor, CO(max) reduced 2200 Application Information further guidance. This typical electrolytic (nonceramic) output capacitance. minimum when using maximum-ESR values calculate.
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
TYPICAL CHARACTERISTICS (3.3-V INPUT)
EFFICIENCY OUTPUT CURRENT
Efficiency
OUTPUT VOLTAGE RIPPLE OUTPUT CURRENT
Output Ripple Voltage mVPP
Output Current
Output Current
Figure POWER DISSIPATION OUTPUT CURRENT
Power Dissipation
Figure TEMPERATURE DERATING OUTPUT CURRENT
Temperature Derating-
Flow Conv
Airflow parallel long axis module
Output Current
Output Current
Figure
Figure
electrical characteristic data been developed from actual products tested 25C. This data considered typical converter. Applies Figure Figure Figure temperature derating curves represent conditions which internal components below manufacturer's maximum operating temperatures. airflow direction parallel long axis module. Derating limits apply modules soldered directly double-sided with copper. Applies Figure
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
DEVICE INFORMATION
TERMINAL FUNCTIONS
TERMINAL NAME DESCRIPTION positive input voltage power node module, which referenced common GND. regulated positive power output with respect node. This common ground connection power connections. also 0-Vdc reference control inputs. Inhibit open-collector/drain, active-low input that referenced GND. Applying low-level ground signal this input disables module output turns output voltage. When Inhibit control active, input current drawn regulator significantly reduced. inhibit feature used, control left open-circuit. module then produces output voltage whenever valid input source applied. resistor must connected directly between this (pin recommended) output voltage module higher than lowest value. temperature stability resistor should ppm/C better). set-point range resistor value calculated using formula. this input left open-circuit, output voltage defaults lowest value. further information, related application note. specification table gives standard resistor values number common output voltages. This analog control input that enables output voltage follow external voltage. This becomes active typically after input voltage been applied, allows direct control output voltage from nominal set-point voltage. Within this range, output follows voltage Track volt-for-volt basis. When control voltage raised above this range, module regulates set-point voltage. feature allows output voltage rise simultaneously with other modules powered from same input bus. unused, this input should connected NOTE: undervoltage lockout feature, output module cannot follow input voltage during power related Application Information further guidance. Front View Module
Inhibit
Adjust
Track
Figure Terminal Locations
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
APPLICATION INFORMATION Capacitor Recommendations PTV03010W Power Module
Input Capacitors required input capacitors 10-µF ceramic minimum 100-µF electrolytic type. 100-µF capacitance must rated mArms ripple current capability. Table above ripple current requirements conditional that 10-µF ceramic capacitor present. 10-µF X5R/X7R ceramic capacitor necessary reduce both magnitude ripple current through electroytic capacitor amount ripple current reflected back input source. Ceramic capacitors should located within inch. (1,3 module's input pins. Additional ceramic capacitors added reduce ripple current requirement electrolytic capacitor. Ripple current (rms) rating, less than 150-m equivalent series resistance (ESR), temperature major considerations when selecting input capacitors. Unlike polymer-tantalum capacitors, regular tantalum capacitors have recommended minimum voltage rating (max. voltage ripple). This standard practice ensure reliability. Only tantalum capacitors were found have sufficient voltage rating meet this requirement. temperatures below 0°C, aluminum electrolytic capacitors increases. these applications, Os-Con, polymer-tantalum, polymer-aluminum types should considered. Output Capacitor (Optional) applications with load transients (sudden changes load current), regulator response benefits from external output capacitance. recommended output capacitance allows module meet transient response specification. most applications, high-quality computer-grade aluminum electrolytic capacitor adequate. These capacitors provide decoupling over frequency range, kHz, suitable when ambient temperatures above 0°C. operation below 0°C, tantalum-, ceramic-, Os-Con-type capacitors recommended. When using more nonceramic capacitors, calculated should lower than using manufacturer's maximum single capacitor). list preferred low-ESR-type capacitors identified Table Ceramic Capacitors Above kHz, performance aluminum electrolytic capacitors less effective. Multilayer ceramic capacitors have resonant frequency higher than bandwidth regulator. They used reduce reflected ripple current input well improve transient response output. When used output, their combined critical long total value ceramic capacitance does exceed approximately Also, prevent formation local resonances, place more than five identical ceramic capacitors parallel with values greater. Tantalum Capacitors Tantalum-type capacitors only used output bus, recommended applications where ambient operating temperature less than 0°C. TPS, Sprague 593D/594/595, Kemet T495/T510 capacitor series suggested over many other tantalum types their higher rated surge, power dissipation, ripple current capability. caution, many general-purpose tantalum capacitors have considerably higher ESR, reduced power dissipation, lower ripple current capability. These capacitors also less reliable they have reduced power dissipation surge current ratings. Tantalum capacitors that have stated surge current rating recommended power applications. Capacitor Table Table identifies characteristics capacitors from number vendors with acceptable ripple current (rms) ratings. recommended number capacitors required both input output buses identified each capacitor type. Note:This extensive capacitor list. Capacitors from other vendors available with comparable specifications. Those listed guidance. ripple current rating kHz) critical parameters necessary ensure both optimum regulator performance long capacitor life.
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
APPLICATION INFORMATION (continued)
Table Input/Output Capacitors
Capacitor Characteristics Capacitor Vendor, Type, Series (Style) Working Voltage Value (µF) 0.117 0.117 0.16 Ripple Current 85°C (Irms) (mA) Physical Size (mm) 11,5 11,5 10,2 12,5 11,5 10,5 3225 3225 3225 3225 Input Quantity Optional Output
Vendor Part Number
Panasonic, Aluminum (Radial) (SMD) United Chemi-Con PSA,Poly-Alum (Radial) LXZ, Aluminum (Radial) MVZ, Auminum (SMD) PXA, Poly-Alum (SMD) Nichicon, Aluminum (Radial) Sanyo Poscap SEQP, Os-Con (Radial) SVP, Os-Con (SMD) AVX, Tantalum, (SMD) (SMD) Kemet (SMD) T520, Poly-Tant (SMD) T530, Poly-Tant/Organic Vishay-Sprague 94SVP, Os-Con (SMD) 595D, Tantalum (SMD) 94SA, Os-Con (Radial) Kemet, Ceramic (SMD)
EEUFC1A331 EEUFC1C221 EEVFK0J471P
0.02 0.12 0.09 0.027 0.09 0.072
3160 2800
PSA6.3VB220MF11 LXZ10VB471M8X12LL MVZ16VC681MJ10TP PXA10VC121MH70TP UPM1C271MHH6 UHD1A471MPR
0.025 0.035 0.04 0.075 0.05
2400 2500 1810 >1090 >1559
10TPE220M 10SEQP120M 6SVP100M TPSC107M010R0075 TPSD157M010R0050
0.055 0.01
1500 >5200
T520D107M010ASE055 T530X337M010ASE010
0.04 0.14 0.03 0.002 0.002 0.002 0.002
2120 1040 2670
94SVP127X0010E7 595D227X0010D2T 94SA107X0010EBP C1210C106M4PAC C1210C226K9PAC C1210C476K9PAC GRM32ER60J107M GRM32ER60J476M GRM32ER61C226K GRM32DR61C106K C3225X5R0J107MT C3225X5R0J476MT C3225X5R1C226MT C3225X5R1C106MT
Murata, Ceramic (SMD)
TDK, Ceramic (SMD)
0.002
3225
Capacitor Supplier Verification Please verify availability capacitors identified this table. Capacitor suppliers recommend alternative part numbers because limited availability obsolete products. some instances, capacitor product life cycle decline have short-term consideration obsolescence. RoHS, Lead-free Material Details Please consult capacitor suppliers regarding material composition, RoHS status, lead-free status, manufacturing process requirements. Component designators part number deviations occur when material composition soldering requirements updated. Ceramic capacitors required complement electrolytic types input reduce high-frequency ripple current.
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
Designing Fast Load Transients transient response dc/dc converter been characterized using load transient with di/dt A/µs. typical voltage deviation this load transient given data sheet specification table using optional value output capacitance. di/dt transient increased, response converter regulation circuit ultimately depends output capacitor decoupling network. This inherent limitation with dc/dc converter once speed transient exceeds bandwidth capability. target application specifies higher di/dt lower voltage deviation, requirement only with additional output capacitor decoupling. these cases, special attention must paid type, value, capacitors selected. transient performance requirements exceed that specified data sheet, total amount load capacitance above 3000 selection output capacitors becomes more important.
Adjusting Output Voltage
Adjust control (pin sets output voltage PTV03010W product value over range, adjustment method requires addition single external resistor, RSET, that must connected directly between Adjust regulator's output (pin recommended). Without adjust resistor, output voltage lowest value. Table gives preferred value external resistor number standard voltages, along with actual output voltage that this resistance value provides. Figure shows placement required resistor. Table Nearest Standard Values RSET Common Output Voltages
(Required) RSET (Standard Value) 2.21 4.12 5.49 8.87 17.4 36.5 Open (Actual) 2.502 2.010 1.803 1.504 1.202 1.005 0.800
other output voltages, value required resistor either calculated simply selected from range values given Table Equation used calculating adjust resistor value. 2.49
PTV03010W VOAdj
RSET,
Figure Adjust Resistor Placement
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
Table Calculated Values RSET Other Output Voltages
0.800 0.825 0.850 0.875 0.900 0.925 0.950 0.975 1.000 1.025 1.050 1.075 1.100 1.125 1.150 1.175 1.200 1.225 1.250 1.300 1.350 1.400 RSET Open 77.5 61.5 50.8 43.2 37.5 33.1 29.5 26.6 24.2 22.1 20.4 18.8 17.5 16.3 15.3 13.5 12.1 10.8 1.450 1.500 1.550 1.600 1.650 1.700 1.750 1.800 1.850 1.900 1.950 2.000 2.050 2.100 2.150 2.200 2.250 2.300 2.350 2.400 2.450 2.500 RSET 9.82 8.94 8.18 7.51 6.92 6.40 5.93 5.51 5.13 4.78 4.47 4.18 3.91 3.66 3.44 3.22 3.03 2.84 2.67 2.51 2.36 2.22
Features PTH/PTV Family Nonisolated, Wide-Output Adjustable Power Modules
POLACompatibility PTH/PTV family nonisolated, wide-output adjustable power modules from Texas Instruments optimized applications that require flexible, high-performance module that small size. Each these products POLAcompatible. POLA-compatible products produced number manufacturers, offer customers advanced, nonisolated modules with same footprint form factor. POLA parts also ensured interoperable, which provides customers with second-source option.
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
Soft-Start Power Auto-Track feature allows power multiple PTH/PTV modules directly controlled from Track pin. However, stand-alone configuration, when Auto-Track feature being used, Track directly connected input voltage, (see Figure
Track PTV03010W Adjust
RSET 5.49 0.05
Figure Power-Up Application Circuit When Track connected input voltage, Auto-Track function permanently disengaged. This allows module power entirely under control internal soft-start circuitry. When power under soft-start control, output voltage rises set-point quicker more linear rate.
V/div)
V/div)
A/div)
-Time ms/div
Figure Power-Up Waveform From moment valid input voltage applied, soft-start control introduces short time delay (typically before allowing output voltage rise. output then progressively rises module set-point voltage. Figure shows soft-start power-up characteristic PTV03010W, operating from 3.3-V input configured 1.8-V output. waveforms were measured with resistive load Auto-Track feature disabled. initial rise input current when input voltage first starts rise charge current drawn input capacitors. Power complete within
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
Output On/Off Inhibit applications requiring output voltage on/off control, modules incorporate output Inhibit control. inhibit feature used wherever there requirement output voltage from regulator turned off. power modules function normally when Inhibit input left open-circuit, providing regulated output whenever valid source voltage connected with respect GND. Figure shows typical application inhibit function. Note discrete transistor (Q1). Inhibit input internal pullup (see footnotes electrical characteristics table). input compatible with logic devices. open-collector open-drain) discrete transistor recommended control.
Track PTV03010W VOAdj
Inhibit
BSS138
RSET 2.21
Inhibit
Figure On/Off Inhibit Application Circuit Turning applies voltage Inhibit control disables output module. then turned off, module executes soft-start power-up sequence. regulated output voltage produced within Figure shows typical rise both output voltage input current, following turnoff turnoff corresponds rise waveform, VDS. waveforms were measured with constant current load.
V/div)
A/div)
V/div)
Time ms/div
Figure Inhibit Waveform
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
Overcurrent Protection (OCP) protection against load faults, modules incorporate output overcurrent protection. Applying load that exceeds overcurrent threshold causes regulated output shut down. Following shutdown, module periodically attempts recover initiating soft-start power This described hiccup mode operation, whereby module continues cycle successive shutdown power until load fault removed. During this period, average current flowing into fault significantly reduced. Once fault removed, module automatically recovers returns normal operation. Auto-TrackFunction Auto-Track function unique PTH/PTV family, available with POLA products. Auto-Track designed simplify amount circuitry required make output voltage from each module power power down sequence. sequencing more supply voltages during power common requirement complex mixed-signal applications that dual-voltage VLSI such TMS320DSP family, microprocessors, ASICs. Auto-TrackWorks Auto-Track works forcing module output voltage follow voltage presented Track control (1). This control range limited between module set-point voltage. Once track-pin voltage raised above set-point voltage, module output remains set-point (2). example, Track 2.5-V regulator regulated output voltage Track rises regulated output does higher than Under Auto-Track control, regulated output from module follows voltage Track volt-for-volt basis. connecting Track number these modules together, output voltages follow common signal during power power down. control signal externally generated master ramp waveform, output voltage from another power supply circuit (3). convenience, Track input incorporates internal RC-charge circuit. This operates module input voltage produce suitable rising waveform power Typical Application basic implementation Auto-Track allows simultaneous voltage sequencing number Auto-Track compliant modules. Connecting Track inputs more modules forces their track input follow same collective RC-ramp waveform, allows their power-up sequence coordinated from common track control signal. This open-collector open drain) device, such power-up reset voltage supervisor Figure coordinate power-up sequence, Track control must first pulled ground potential. This should done before input power applied modules. ground signal should maintained least after input power been applied. This brief period gives modules time complete their internal soft-start initialization (4), enabling them produce output voltage. low-cost supply voltage supervisor that includes built-in time delay, ideal component automatically controlling track inputs power Figure shows TPS3808G33 supply voltage supervisor (U3) used coordinate sequenced power-up 3.3-V input Auto-Track modules. output TPS3808G33 supervisor becomes active above input voltage enabling assert ground signal common track control well before input voltage reached module's undervoltage lockout threshold. ground signal maintained until approximately after input voltage risen above U3's voltage threshold, which 3.07 27-ms time period controlled capacitor value 4700 provides sufficient time delay modules complete their internal soft-start initialization. output voltage each module remains zero until track control voltage allowed rise. When removes ground signal, track control voltage automatically rises. This causes output voltage each module rise simultaneously with other modules, until each reaches respective set-point voltage. Figure shows output voltage waveforms from circuit Figure after input voltage applied circuit. waveforms, represent output voltages from power modules, (2.5 (1.2 respectively. VTRK, VO1, shown rising together produce desired simultaneous power-up characteristic.
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
same circuit also provides power-down sequence. When input voltage falls below U3's voltage threshold, ground signal reapplied common track control. This pulls track inputs zero volts, forcing output each module follow, shown Figure order simultaneous power-down occur, track inputs must pulled before input voltage fallen below modules' undervoltage lockout. This important constraint. Once modules recognize that valid input voltage longer present, their outputs longer follow voltage applied their track input. During power-down sequence, fall output voltage from modules limited maximum output capacitance Auto-Track slew rate. Track pulled slew rate greater than V/ms, discharge output capacitors will induce large currents which could exceed peak current rating module. This will result reduction maximum allowable output capacitance listed Electrical Characteristics table. When controlling Track PTV03010W using voltage supervisor slew rate increased, therefore COmax reduced 2200 Notes Auto-Track1. Auto-Track function tracks almost voltage ramp during power compatible with ramp speeds V/ms. Track voltage must allowed rise above module set-point voltage before module regulates adjusted set-point voltage. absolute maximum voltage that applied Track input voltage module cannot follow voltage track control input until completed soft-start initialization. This takes about from time that valid voltage been applied input. During this period, recommended that Track held ground potential. Auto-Track function disabled connecting Track input voltage (VI). When Auto-Track disabled, output voltage rises quicker more linear rate after input power been applied.
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
+3.3
Track
PTH03050W
Adjust
Inhibit
RSET1
2.21
SENSE
RESET
TPS3808G33
Track
Sense
4700
PTH03060W
Inhibit
Adjust
RTRK Number Track pins connected together
RSET2
17.4
Figure Sequenced Power Power Down Using Auto-Track
VTRK V/div) V/div)
VTRK V/div) V/div)
V/div)
V/div)
Time ms/div
Time µs/div
Figure Simultaneous Power With Auto-Track Control
Figure Simultaneous Power Down With Auto-Track Control
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
Prebias Start-Up Capability prebias start-up condition occurs result external voltage being present output power module prior output becoming active. This often occurs complex digital systems when current from another power source backfed through dual-supply logic component, such FPGA ASIC. Another path might clamp diodes, sometimes used part dual-supply power-up sequencing arrangement. prebias cause problems with power modules that incorporate synchronous rectifiers. This because under most operating conditions, such modules sink well source output current. PTH/PTV modules incorporate synchronous rectifiers sink current during start-up, whenever Inhibit held low. Start-up includes initial delay (approximately 8-15 ms), followed rise output voltage under control module internal soft-start mechanism; Figure Conditions Prebias Holdoff order module allow output prebias voltage exist (and sink current), certain conditions must maintained. module holds prebias voltage when Inhibit held low, whenever output allowed rise under soft-start control. Power under soft-start control occurs removal ground signal Inhibit (with input voltage applied), when input power applied with Auto-Track disabled(1). further ensure that regulator does sink output current (even with ground signal applied Inhibit), input voltage must also greater than applied prebias source, throughout power-up sequence(2). soft-start period complete when output begins rising above prebias voltage. module then functions normal, sinks current voltage higher than set-point value applied output. Note: prebias condition present, soft-start period complete when output voltage risen either set-point voltage, voltage applied module Track control pin, whichever lowest, output. Demonstration Circuit Figure shows start-up waveforms demonstration circuit shown Figure initial rise prebias voltage, which passed from VCCIO VCORE voltage rail through ASIC. Note that output current from module (IO) negligible until output voltage rises above applied prebias.
V/div) V/div)
V/div)
V/div) A/div)
Start-up Period
Time ms/div
Time ms/div
Figure PTV03010W Start-Up
Figure Prebias Start-Up Waveforms
Submit Documentation Feedback
PTV03010W
SLTS241A FEBRUARY 2005 REVISED JULY 2007
NOTES: prebias start-up feature compatible with Auto-Track. rise output limited voltage applied Track control pin, output sinks current during period that track control voltage below that back-feeding source. this reason, Auto-Track should disabled when being used. This accomplished connecting Track input voltage, This raises Track well above set-point voltage prior start-up, which defeats Auto-Track feature. further ensure that regulator output does sink current when power first applied (even with ground signal applied Inhibit control input), input voltage must always greater than applied prebias source. This condition must exist throughout power-up sequence power system.
Track PTV03010W Vadj VCORE RSET 8.87 ASIC VCCIO
Figure Application Circuit Demonstrating Prebias Start-Up
Submit Documentation Feedback
PACKAGE OPTION ADDENDUM
9-Oct-2007
PACKAGING INFORMATION
Orderable Device PTV03010WAH
Status ACTIVE
Package Type
Package Drawing
Pins Package Plan Pb-Free (RoHS)
Lead/Ball Finish Call
Peak Temp Type
marketing status values defined follows: ACTIVE: Product device recommended designs. LIFEBUY: announced that device will discontinued, lifetime-buy period effect. NRND: recommended designs. Device production support existing customers, does recommend using this part design. PREVIEW: Device been announced production. Samples available. OBSOLETE: discontinued production device.
Plan planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), Green (RoHS Sb/Br) please check latest availability information additional product content details. TBD: Pb-Free/Green conversion plan been defined. Pb-Free (RoHS): TI's terms "Lead-Free" "Pb-Free" mean semiconductor products that compatible with current RoHS requirements substances, including requirement that lead exceed 0.1% weight homogeneous materials. Where designed soldered high temperatures, Pb-Free products suitable specified lead-free processes. Pb-Free (RoHS Exempt): This component RoHS exemption either lead-based flip-chip solder bumps used between package, lead-based adhesive used between leadframe. component otherwise considered Pb-Free (RoHS compatible) defined above. Green (RoHS Sb/Br): defines "Green" mean Pb-Free (RoHS compatible), free Bromine (Br) Antimony (Sb) based flame retardants exceed 0.1% weight homogeneous material)
MSL, Peak Temp. Moisture Sensitivity Level rating according JEDEC industry standard classifications, peak solder temperature. Important Information Disclaimer:The information provided this page represents TI's knowledge belief date that provided. bases knowledge belief information provided third parties, makes representation warranty accuracy such information. Efforts underway better integrate information from third parties. taken continues take reasonable steps provide representative accurate information have conducted destructive testing chemical analysis incoming materials chemicals. suppliers consider certain information proprietary, thus numbers other limited information available release. event shall TI's liability arising such information exceed total purchase price part(s) issue this document sold Customer annual basis.
Addendum-Page
IMPORTANT NOTICE
Texas Instruments Incorporated subsidiaries (TI) reserve right make corrections, modifications, enhancements, improvements, other changes products services time discontinue product service without notice. Customers should obtain latest relevant information before placing orders should verify that such information current complete. products sold subject TI's terms conditions sale supplied time order acknowledgment. warrants performance hardware products specifications applicable time sale accordance with TI's standard warranty. Testing other quality control techniques used extent deems necessary support this warranty. Except where mandated government requirements, testing parameters each product necessarily performed. assumes liability applications assistance customer product design. Customers responsible their products applications using components. minimize risks associated with customer products applications, customers should provide adequate design operating safeguards. does warrant represent that license, either express implied, granted under patent right, copyright, mask work right, other intellectual property right relating combination, machine, process which products services used. Information published regarding third-party products services does constitute license from such products services warranty endorsement thereof. such information require license from third party under patents other intellectual property third party, license from under patents other intellectual property Reproduction information data books data sheets permissible only reproduction without alteration accompanied associated warranties, conditions, limitations, notices. Reproduction this information with alteration unfair deceptive business practice. responsible liable such altered documentation. Information third parties subject additional restrictions. Resale products services with statements different from beyond parameters stated that product service voids express implied warranties associated product service unfair deceptive business practice. responsible liable such statements. products authorized safety-critical applications (such life support) where failure product would reasonably expected cause severe personal injury death, unless officers parties have executed agreement specifically governing such use. Buyers represent that they have necessary expertise safety regulatory ramifications their applications, acknowledge agree that they solely responsible legal, regulatory safety-related requirements concerning their products products such safety-critical applications, notwithstanding applications-related information support that provided Further, Buyers must fully indemnify representatives against damages arising products such safety-critical applications. products neither designed intended military/aerospace applications environments unless products specifically designated military-grade "enhanced plastic." Only products designated military-grade meet military specifications. Buyers acknowledge agree that such products which designated military-grade solely Buyer's risk, that they solely responsible compliance with legal regulatory requirements connection with such use. products neither designed intended automotive applications environments unless specific products designated compliant with ISO/TS 16949 requirements. Buyers acknowledge agree that, they non-designated products automotive applications, will responsible failure meet such requirements. Following URLs where obtain information other Texas Instruments products application solutions: Products Amplifiers Data Converters DLP® Products Clocks Timers Interface Logic Power Mgmt Microcontrollers RFID RF/IF ZigBee® Solutions amplifier.ti.com dataconverter.ti.com www.dlp.com dsp.ti.com www.ti.com/clocks interface.ti.com logic.ti.com power.ti.com microcontroller.ti.com www.ti-rfid.com www.ti.com/lprf Applications Audio Automotive Broadband Digital Control Medical Military Optical Networking Security Telephony Video Imaging Wireless www.ti.com/audio www.ti.com/automotive www.ti.com/broadband www.ti.com/digitalcontrol www.ti.com/medical www.ti.com/military www.ti.com/opticalnetwork www.ti.com/security www.ti.com/telephony www.ti.com/video www.ti.com/wireless
Mailing Address: Texas Instruments, Post Office 655303, Dallas, Texas 75265 Copyright 2009, Texas Instruments Incorporated
Other recent searches
STN888 - STN888 STN888 Datasheet
SK22AL - SK22AL SK22AL Datasheet
SK24AL - SK24AL SK24AL Datasheet
RD30HUF1 - RD30HUF1 RD30HUF1 Datasheet
MP02503 - MP02503 MP02503 Datasheet
IR3081 - IR3081 IR3081 Datasheet
AN2788 - AN2788 AN2788 Datasheet
1769410000 - 1769410000 1769410000 Datasheet
Privacy Policy | Disclaimer
© 2012 Datasheet Archive
