1MHz, Step Down DC/DC Regulator Source/Sink 1MHz Switches Frequen

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1MHz, Step Down DC/DC Regulator Source/Sink 1MHz Switches Frequen

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APW7093
1MHz, Step Down DC/DC Regulator
Source/Sink 1MHz Switches Frequency Efficiency Internal PMOS/NMOS Switches 70m/40m On-Resistance 4.5V 90m/60m On-Resistance
General Description
APW7093 reversible energy flow, constantoff-time, pulse-width modulated (PWM), step-down DC-DC converter. ideal notebook sub-notebook computers that require 1.1V active termination power supplies. This device features internal PMOS power switch internal synchronous rectifier high efficiency reduced component count. internal PMOS power switch NMOS synchronous-rectifier switch easily deliver continuous load currents APW7093 accurately tracks external reference voltage, produces adjustable output from 1.1V VIN, achieves efficiencies high 94%. 7093 uses unique current-mode, constant-off-time, control scheme that allows output source sink current. This feature allows energy return input power supply that otherwise would wasted. programmable constant-off-time architecture sets switching frequencies 1MHz, allowing user optimize performance trade-offs between efficiency, output switching noise, component size, cost. APW7093 features adjustable soft-start limit surge currents during startup, 100% duty-cycle mode low-dropout operation, low-power shutdown mode that disables power switches reduces supply current below 1µA. APW7093 available 32-pin with exposed backside 16-pin SSOP.
Output Accuracy 1.1V Adjustable Output Voltage +5.5V Input Voltage Range <1µA Shutdown Supply Current Programmable Constant-Off-Time Operation Thermal Shutdown Adjustable Soft-Start Inrush Current Limiting Output Short-Circuit Protection Lead Free Available (RoHS Compliant)
Applications
Motherboard Graphics Cards Cable Modems, Boxes Supplies Memory Supplies Input DC-DC Regulators Distributed Power Supplies
ANPEC reserves right make changes improve reliability manufacturability without notice, advise customers obtain latest version relevant information verify before placing orders. Copyright ANPEC Electronics Corp. Rev. Jun., 2005 www.anpec.com.tw
APW7093
Description
SHDN EXTREF TOFF APW7093 PGND PGND PGND
SHDN EXTREF TOFF
PGND PGND
APW7093
SSOP
Ordering Marking Information
APW7093
Lead Free Code Handling Code Temp. Range Package Code
APW7093 APW7093 XXXXX
Package Code SSOP-16 Operating Ambient Temp. Range Handling Code TubeTR Tape Reel Lead Free Code Lead Free Device Blank Original Device
XXXXX Date Code
APW7093
APW7093 XXXXX
XXXXX Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials 100% matte plate termination finish; which fully compliant with RoHS compatible with both SnPb lead-free soldiering operations. ANPEC lead-free products meet exceed lead-free requirements IPC/JEDEC STD-020C classification lead-free peak reflow temperature.
Copyright ANPEC Electronics Corp. Rev. Jun., 2005
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APW7093
Block Diagram
0.01 CURRENT SENSE +3.0V +5.5V
EXTREF
SHDN
LOGIC DRIVERS
TIMER
TOFF
PGND
Fig1. Block Diagram
Absolute Maximum Ratings
Parameter PGND Rating -0.3 ±0.3 ±0.3 -0.3 VCC+0.3 -0.3 VIN-1.7
Unit
SHDN OFF, VREF
EXTREF Power dissipation; Part mount copper; QFN-28 Power dissipation; Part mount copper; SSOP-16 Current Operating Temperature Range Junction Temperature Storage Temperature Range Lead Temperature (soldering,10s)
-3.5 +4.1 +150 -65~+150 +300
Recommend Operating Condition
Recommend Operating Condition Symbol Parameter Input Voltage Range VOUT Output Voltage Range COUT Output Capacitor Input Capacitor Inductor RTOFF
Programmed off-time Resistance
0.56
UNIT
NOTE VEXTREF<= VIN-1.7V Capacitor Refer Application section further Information.
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Copyright ANPEC Electronics Corp. Rev. Jun., 2005
APW7093
Electrical Characteristics
(VIN=VCC=3.3V, VEXTREF=+1.1V, TA=-45 +85oC, unless otherwise noted, Typical values =+25oC.)
Symbol Parameter Test Conditions APW7093 VIN=VCC=+3.0V +5.5V, ILOAD=0,VEXTREF=1.25V (Note2) ILOAD=-3A +3A, VEXTREF=+1.25V VREF 0.01 Unit SHDN Logic Levels
VIN, Input Voltage Feedback Voltage Accuracy (VFB -VEXTREF) Feedback Load Regulation Error
VEXTREF External Reference Voltage Range VIN=VCC=+3.0 +5.5V VREF Reference Voltage Reference Load Regulation RPMOS RNMOS ILIMIT SHDN PMOS Switch On-Resistance NMOS Switch On-Resistance Current Limit Threshold Switching Frequency Load Supply Current Shutdown Supply Current Thermal Shutdown Threshold UVLO Under Voltage Lockout Threshold Input Current IREF= -1µA +10µA ILX=0.5A ILX=0.5A (Note3) VIN=+4.5V VIN=+3.0V VIN=+4.5V VIN=+3.0V
1.07 1.10 1.12
=500kHz =500kHz
SHDN GND, ICC+ Hysteresis =15°C falling, hysteresis 90mV VFB=VEXTREF+0.1V RTOFF=30.1k
0.40 0.44 0.48 1.10 1.20 1.30
TOFF
Off-Time
RTOFF=110k RTOFF=499k
Startup Off-Time On-Time Source Current Sink Current SHDN Input Current IOUT(RMS) Maximum Output Current
Copyright ANPEC Electronics Corp. Rev. Jun., 2005
(Note3)
0.34
VSS=1V SHDN
ARMS
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APW7093
Electrical Characteristics (Cont.)
(VIN=VCC=3.3V, VEXTREF=+1.1V, +85oC, unless otherwise noted, Typical values =+25oC.)
Symbol SHDN Logic Levels IOUT(RMS) Maximum Output Current Parameter Test Conditions APW7093 Unit
ARMS
Note2: output voltage will have DC-regulation level lower than feedback error comparator threshold ripple. Note3: Recommended operating frequency, production tested.
Functional Description
Name (QFN) 1,5,7,9,11,13,16,19, 25,26,28,30,32 (QSOP) FUNCTION Connection, internally connected. Supply Voltage Input internal PMOS Power Switch. internally connected. Externally connect pins proper operation. Inductor Connection. Connection drains PMOS power switch NMOS synchronous-rectifier switch. Connect inductor from this node output filter capacitor load. internally connected. Externally connect pins proper operation. Soft-Start Connect capacitor from limit inrush current during startup. External Reference Input Feedback input regulates VEXTREF. controller remains until EXTREF greater than REF. Off-Time Select Input. Sets PMOS power switch constant-off-time. Connect resistor from TOFF adjust PMOS switch off-time. Feedback Input. Connect directly output fixed-voltage operation resistive-divider adjustable operating modes. Analog Ground. Connect exposed backside corner tabs analog GND. Reference Output. Bypass with 0.1µF capacitor. (pin QFN; SSOP) Analog Supply Voltage Input. Supplies internal analog circuitry. Bypass with low-pass filter. Figure2. Power Ground. Internally connected internal NMOS synchronous-rectifier switch. Shutdown control Input Drive SHDN disable reference, control circuitry, internal MOSFETs. Drive high connect normal operation.
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3,21,22,27,29
3,14,16
EXTREF
TOFF
PGND SHDN
14,17,backside pad, corner tabs 20,23,24
13,15
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APW7093
Typical Application
APW7093 PGND SHDN VEXTREF EXTREF TOFF TOFF 0.01µF 220µF VOUT
=5V: L=1mH, RTOFF=100kW VIN=3.3V: L=0.68mH, RTOFF=68kW Fig2. Typical Applicatin Circuit
Typical Characteristics
(Circuit Figure2, VOUT=1.25V, VIN=3.3V: 0.68µH, RTOFF=68k; VIN=5V: L=1µH, TOFF=100k. TA=25C specially)
Effienciency Output Current
Load Supply Current Input Voltage
VIN=5V, VOUT=3.3V
Load Supply Current(mA)
Efficiency(%)
VIN=5V, VOUT=1.25V VIN=5V, VOUT=2.5V VIN=3.3V, VOUT=1.25V
VOUT=1.25V RTOFF=68k
Output Current(A)
Input Voltage(V)
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APW7093
Typical Characteristics (Cont.)
(Circuit Figure2, VOUT=1.25V, VIN=3.3V: 0.68µH, RTOFF=68k; VIN=5V: L=1µH, TOFF=100k. TA=25C specially)
Switching Frequency Output Current
OFF-TIME RTOFF
Switching Frequency(kHz)
VIN=3.3V
OFF-TIME(µs)
Output Current(A)
RTOFF(k)
VREF Input Voltage
1.114
Start Shut Down
SHDN=2V/DIV
1.113
VREF(V)
1.112
VSS=2V/DIV
1.111
IN=1A/DIV
1.110
TIME 2ms/DIV
Input Voltage(V)
VIN=3.3V, VOUT=1.25V, ROUT=0.4
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APW7093
Typical Characteristics (Cont.)
(Circuit Figure2, VOUT=1.25V, VIN=3.3V: 0.68µH, RTOFF=68k; VIN=5V: L=1µH, TOFF=100k. TA=25°C specially)
Load Transient Response
IOUT=3A
Load Transient Response
IOUT=3A
IOUT=
IOUT=0A
IOUT=0A IOUT=
VOUT 100mV/DIV
VOUT 100mV/DIV
VOUT 100mV/DIV
TIME 20µs/DIV TIME 20us/DIV
TIME 20µs/DIV
VIN=5V, VOUT=1.25V,
VIN=5V, VOUT=2.5V,
Load Transient Response
Line Transient Response
IOUT=3A VIN=5.0V IOUT=0A VIN=3.0V
VOUT 100mV/DIV
VOUT 100mV/DIV
TIME 20µs/DIV
TIME 40µs/DIV
VIN=3.3V, VOUT=1.25V,
Copyright ANPEC Electronics Corp. Rev. Jun., 2005
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APW7093
Typical Characteristics (Cont.)
(Circuit Figure2, VOUT=1.25V, VIN=3.3V: 0.68µH, RTOFF=68k; VIN=5V: L=1µH, TOFF=100k. TA=25°C specially)
Light Load Waveform
5V/DIV
Heavy Load Waveform
5V/DIV
1A/DIV
1A/DIV
VOUT 50mV/DIV
VOUT 50mV/DIV
TIME 1µs/DIV
TIME 1µs/DIV
IOUT=100mA
IOUT=3A
VREF Temperature
1.118 1.116 1.114 1.112
Output Voltage Temperature
1.255
1.253
VIN=3.3V
VREF(V)
VOUT(V)
1.110 1.108 1.106 1.104 1.102 1.100 1.098
1.251
VIN=3.3V IOUT=0A
1.249
1.247
1.245
Temperature(°C)
Temperature(°C)
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APW7093
Function Descriptions
APW7093 synchronous, current-mode, constant off-time, DC-DC converter steps down input voltages 5.5V adjustable output voltage from 1.1V voltage applied EXTREF. sources sinks output current. Internal switches composed 90mPMOS power switch NMOS synchronous-rectifier switch improve efficiency, reduce component count, eliminate need external Schottky diode across synchronous switch. APW7093 operates constant-off-time mode under loads. single resistor-programmable constant- tradeoffs efficiency, switching noise, component size, cost. When power drawn from regulated supply, constant-off-time architecture essentially provides constant-frequency operation. This architecture inherent advantage quick response line load transients. APW7093' current-mode, constant-off-time architecture regulates output voltage changing PMOS switch on-time relative constant off-time. path current flow when inductor discharging. Replacing Schottky diode with low-resistance NMOS synchronous switch reduces conduction losses improves efficiency. NMOS synchronous-rectifier switch turns following short delay (typ. 20ns) after PMOS power switch turns off, thus preventing cross-conduction "shoot-through." constant-offtime mode, synchronous-rectifier switch turns just prior PMOS power switch turning While both switches off, inductor current flows through internal body diode NMOS switch.
Constant-Off-Time Operation
constant-off-time architecture, voltage comparator turns PMOS switch each off-time, keeping device continuousconduction mode. PMOS switch remains until feedback voltage exceeds external reference voltage (VEXTREF) positive current limit reached. When PMOS switch turns off, remains programmed off-time (TOFF control current under short-circuit conditions, PMOS switch remains approximately TOFF when VEXTREF
Current Sourcing Sinking operating constant-off-time, pseudo-fixedfrequency mode, APW7093 both source sink current. Depending output current requirement, circuit operates modes. first mode output draws current APW7093 behaves regular buck controller, sourcing current output from input supply rail. However, when output supplied another source, APW7093 operates second mode synchronous boost, taking power from output returning input. Thermal Resistance
Junction-to-ambient thermal resistance, highly dependent amount copper area immediately surrounding leads. APW7093 package square copper area thermal resistance 50°C/W with forced airflow. 7093 16-pin SSOP evaluation square copper area thermal resistance 80°C/ with forced airflow. Airflow over board significantly reduces junction-to-ambient thermal resistance. heat sinking purposes, essential connect exposed backside package large analog ground plane.
Synchronous Rectification
step-down regulator without synchronous rectification, external Schottky diode provides
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APW7093
Function Descriptions(Cont.)
Shutdown
Drive SHDN logic-level place APW7093 low-power shutdown mode reduce supply current less than 1µA. shutdown, circuitry internal MOSFETs turn off, node becomes high impedance. Drive SHDN logic-level high connect normal operation.
PD(CAP)
where 500pF switching frequency. Resistive losses power switches approximated
PD(RES) IOUT PMOS
where RPMOS on-resistance PMOS switch. junction-to-ambient thermal resistance required dissipate this amount power calculated (TJ,MAX TA,MAX) (PD(CAP) PD(RES)) where: junction-to-ambient thermal resistance TJ,MAX maximum junction temperature TA,MAX maximum ambient temperature
Power Dissipation
Power dissipation APW7093 dominated conduction losses internal power switches. Power dissipation charging discharging gate capacitance internal switches (i.e., switching losses) approximately:
Application Information
typical applications, recommended component values Figure other applications, take following steps: Select desired PWM-mode switching frequency. Figure maximum operating frequency. Select constant off-time function input voltage, output voltage, switching frequency. Select RTOFF function off-time. Select inductor function output voltage, off-time, peak-to-peak inductor current.
1400
Setting Output Voltage
external voltage applied EXTREF sets output voltage APW7093. This come directly from another voltage source external reference. When directly tied output (Figure output voltage range limited external reference' input voltage limits. EXTREF should limited less than VIN-1.7V. Failure comply cause part operate abnormally cause part damage. Alternatively, output adjusted connecting resistordivider between output voltage ground (Figure given
VOUT VEXTREF
Operation Frequency(KHz)
VOUT=2.5V
1200 1000
VOUT=1.1V VOUT=1.25V VOUT=3.3V
Input Voltage(V) Maximum Recommended Operation Frequency
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APW7093
Application Information(Cont.)
Setting Output Voltage (Cont.)
TOFF
EXTREF where: APW7093
(VIN VOUT VPMOS (VIN VPMOS VNMOS
TOFF programmed off-time input voltage VOUT output voltage VPMOS voltage drop across internal PMOS power switch |IOUT RPMOS| VNMOS voltage drop across internal NMOS synchronous-rectifier switch |IOUT RNMOS| switching frequency Make sure that TOFF greater than 400ns when sourcing current. Select RTOFF according formula:
EXTREF EXTREF
1.1V VEXTREF 1.7V
FIG.4 Adjsting Output Voltage using EXTREF
APW7093 EXTREF
TOFF (TOFF 0.18 (109k /1.00
Recommended values RTOFF range from
410k off-times 0.4µs 4µs. Often switching frequency high possible, inductor value reduced minimize energy transferred from inductor capacitor during load-step recovery. operating frequency APW7093 determined primarily TOFF (set RTOFF), shown following formula:
VEXTREF
(VIN VOUT VPMOS TOFF (VIN VPMOS VNMOS
where EXTREF 1.1V FIG.5 Adjsting Output Voltage using
Programming Switching Frequency Off-Time On-Time
APW7093 features programmable PWM-mode switching frequency, which input output voltage value RTOFF, connected from TOFF GND. RTOFF sets PMOS power switch off-time mode. following equation select off-time while sourcing current according desired switching frequency mode:
Copyright ANPEC Electronics Corp. Rev. Jun., 2005
However, output current increases, voltage drop across NMOS PMOS switches increases voltage across inductor decreases. This causes frequency drop. Assuming RPMOS RNMOS, change frequency approximated with following formula:
IOUT RPMOS
TOFF
where PMOS resistance internal MOSFETs (70m typ).
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APW7093
Application Information(Cont.)
Programming Switching Frequency Off-Time On-Time (Cont.)
sinking current, switching frequency increases on-resistances internal switches adding voltage across inductor, reducing on-time. Calculate when sinking current using equation:
Low-ESR low-ESL Tantalum ceramic capacitor should suitable.
Output Capacitor Selection
output filter capacitor affects output voltage ripple, output load-transient response, feedback loop stability. output filter capacitor must have enough meet output ripple load transient requirements, have high enough satisfy stability requirements. Also, capacitance value must high enough guarantee stability absorb inductor energy going from full-load sourcing full load sinking condition without exceeding maximum output tolerance. applications where output subject large load transients, output capacitor' size typically depends much needed prevent output from dipping under load transient.
TOFF
VOUT VNMOS
VOUT VPMOS
Inductor Selection
inductor parameters must specified: inductor value peak current (IPEAK). lower value inductor allows smaller size results higher losses ripple. good compromise between size losses found approximately ripple current load current ratio (I/I 0.25).
VOUT TOFF IOUT 0.25
VOUT OUT(MAX)
actual microfarad capacitance value required defined physical size needed achieve ESR, chemistry capacitor technology. Thus, capacitor usually selected ESR, size voltage rating rather than capacitance value. using low-capacity filter capacitors such ceramic polymer types, capacitor size usually determined capacity needed prevent overshoot undershoot from causing problems during load transients. Generally, once enough capacitance added meet overshoot requirement, undershoot rising-load edge longer problem.
peak inductor current full load calculated
IPEAK IOUT
VOUT TOFF
where IOUT maximum source sink current. Choose inductor with saturation current least high peak inductor current. Additionally, verify peak inductor current while sourcing output current (IOUT ISOURCE) does exceed positive current limit. inductor selected should exhibit losses chosen operating frequency.
Input Capacitor Selection
input filter capacitor reduces peak currents noise voltage source. 22µF 47µF capacitor
required higher power dynamic loads.
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APW7093
Application Information(Cont.)
Soft-Start
Soft-start allows gradual increase internal current limit reduce input surge currents startup exit from shutdown. timing capacitor, CSS, placed from sets rate which internal current limit changed. Upon power-up, when device comes under-voltage lockout (2.6V typ.) after SHDN pulled high, 4.7µA constant current source charges soft-start capacitor voltage increases. When voltage less than approximately 0.7V, current limit zero. voltage increases from 0.7V approximately VIN, current limit adjusted from current-limit threshold. voltage across soft-start capacitor changes with time according equation:
Input Source
output APW7093 accept current reversible properties buck boost converter. When voltage output APW7093 (low-voltage port) exceeds equals output voltage flow energy reverses, going from output input (high-voltage port). input (high voltage port) connected low-impedance source capable absorbing energy, voltage input will rise. This voltage violate absolute maximum voltage input APW7093 destroy part. This occurs when sinking current because topology acts boost converter, pumping energy from low-voltage side (the output), high-voltage side (the input). input (highvoltage side) voltage limited only clamping effect voltage source connected there. avoid this problem, make sure input APW7093 connected impedance, quadrant supply that load (excluding APW7093) connected that supply consumes more power than amount being transferred from APW7093 output input.
output current limit during soft-start varies with voltage soft-start pin, according equation:
ILIIM(SS)=
0.7V) 1.8V 1.1V
Current Limit Short Circuit Protection
APW7093 monitors sourcing sinking current, limits maximum output current prevent damages during overload short-circuit.
where ILIMIT current-limit threshold from Electrical Characteristics. constant-current source stops charging once voltage across soft-start capacitor reaches 1.8V.
SHDN
Circuit Layout Grounding
Good layout necessary achieve APW7093' intended output power level, high efficiency, noise. Good layout includes ground planes, careful component placement, correct routing traces using appropriate trace widths. following points order decreasing importance:
SS(A) 0.7V 1.8V
LIMIT LIMIT
Fig6. Soft-Start Current Limit
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APW7093
Application Information(Cont.)
Circuit Layout Grounding (Cont.)
Minimize switched-current high-current ground loops. Connect input capacitor' ground, output capacitor' ground, close together. Split ground connections. separate traces planes PGND them together single point. output capacitor should placed close output terminals obtain better smoothing effect output ripple. Connect input filter capacitor less than away from connecting copper trace carries large currents must least wide, preferably 2.5mm. 4.Place node components close together near device possible. This reduces resistive switching losses well noise. round planes ssent opti performance. most applications, circuit located multilayer board full four layers recom ended. heat dissipation, connect exposed backside package large analog ground plane, preferably surface board that receives good airflow. ground plane located layer, make N.C. pins adjacent lower thermal resistance ground plane. ground located elsewhere, several vias lower thermal resistance. Typical applications multiple ground planes inim therm resistance. Avoid large currents through analog ground plane.
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APW7093
Packaging Information
SSOP-16
GAUGE PLANE
Millimeters 5.75 0.05 Min. 1.350 0.10 0.20 4.75 3.75 0.625 TYP. 6.25 1.27 0.18 0.226 0.016 0.002 Max. 1.75 0.25 0.30 5.05 4.05 Min. 0.053 0.004 0.008 0.187 0.147
Inches Max. 0.069 0.010 0.012 0.199 0.160 0.025 TYP. 0.246 0.050 0.007
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APW7093
Packaging Information
QFN-32
Millimeters Min. 0.00 0.20 REF. 4.90 4.90 0.18 3.50 3.50 0.500 0.35 0.45 0.014 5.10 5.10 0.28 3.60 3.60 0.192 0.192 0.007 0.138 0.138 Max. 0.84 0.04 Min. 0.00
Inches Max. 0.033 0.0015 0.008 REF. 0.200 0.200 0.011 0.142 0.142 0.020 0.018
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APW7093
Physical Specifications
Terminal Material Lead Solderability Packaging Solder-Plated Copper (Solder Material 90/10 63/37 SnPb Meets Specification RSI86-91, ANSI/J-STD-002 Category 2500 devices reel
(IR/Convection Reflow)
Reflow Condition
Critical Zone
Ramp-up
Temperature
Tsmax
Tsmin Ramp-down Preheat
Peak
Time
Classificatin Reflow Profiles
Profile Feature Average ramp-up rate Preheat Temperature (Tsmin) Temperature (Tsmax) Time (min max) (ts) Time maintained above: Temperature Time (tL) Peak/Classificatioon Temperature (Tp) Time within actual Peak Temperature (tp) Ramp-down Rate Sn-Pb Eutectic Assembly 3°C/second max. 100°C 150°C 60-120 seconds 183°C 60-150 seconds table 10-30 seconds Pb-Free Assembly 3°C/second max. 150°C 200°C 60-180 seconds 217°C 60-150 seconds table 20-40 seconds
6°C/second max. 6°C/second max. minutes max. minutes max. Time 25°C Peak Temperature Notes: temperatures refer topside package .Measured body surface.
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APW7093
Classificatin Reflow Profiles(Cont.)
Table SnPb Entectic Process Package Peak Reflow Temperature Package Thickness Volume Volume <350 <2.5 +0/-5°C +0/-5°C +0/-5°C +0/-5°C
Table Pb-free Process Package Classification Reflow Temperatures Package Thickness Volume Volume Volume <350 350-2000 >2000 <1.6 +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* +0°C* *Tolerance: device manufacturer/supplier shall assure process compatibility including stated classification temperature (this means Peak reflow temperature +0°C. example 260°C+0°C) rated level.
Reliability test program
Test item SOLDERABILITY HOLT Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD Description 245°C 1000 Bias Hrs, 121°C -65°C 150°C, Cycles VHBM 2KV, 200V 10ms 100mA
Carrier Tape Reel Dimension
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APW7093
Carrier Tape Reel Dimension
Application
6.95
1.75±0.1 13±0.3
5.5±0.05 21±0.8
4.0±0.1 13.5±0.5
8.0±0.1 2.0±0.2
2.0±0.05 80±1
1.55±0.05 1.55±0.1 12.0±0.3
SSOP-16
0.3±0.05
(mm)
Cover Tape Dimensions
Application SSOP- Carrier Width 16.8 Cover Tape Width 12.3 Devices Reel 2500
Customer Service
Anpec Electronics Corp. Head Office Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. 886-3-5642000 886-3-5642050 Taipei Branch 137, Lane 235, Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, 886-2-89191368 886-2-89191369
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1MHz, Step Down DC/DC Regulator Source/Sink 1MHz Switches Frequen

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