Micropower 300-mA CMOS Regulator With Error Flag/Power-On-Reset 1

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Micropower 300-mA CMOS Regulator With Error Flag/Power-On-Reset 1

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Si91822
Micropower 300-mA CMOS Regulator With Error Flag/Power-On-Reset
150-mV Dropout 300-mA Load Guaranteed 300-mA Output Current 600-mA Peak Output Current Capability Uses Ceramic Output Capacitor Fast Load Line Transient Response Only 100-mV(rms) Noise With Noise Bypass Capacitor 1-mA Maximum Shutdown Current Built-in Short Circuit Thermal Protection Out-Of-Regulation Error Flag (Power Good POR) Fixed1.215-V, 1.8-V, 2.5-V, 2.8-V, 3.0-V, 3.3-V, 5.0-V, Adjustable Output Voltage Options Other Output Voltages Available Special Order
Available
APPLICATIONS
Cellular Phones Laptop Palm Computers PDA, Digital Still Cameras
DESCRIPTION
Si91822 300-mA CMOS (low dropout) voltage regulator. device features ultra ground current dropout voltage prolong battery life portable electronics. Si91822 offers line/load transient response ripple rejection superior that bipolar BiCMOS regulators. device designed maintain regulation while delivering 600-mA peak current. This useful systems that have high surge current upon turn-on. Si91822 designed drive lower cost ceramic, well tantalum, output capacitors. device guaranteed stable from maximum load current down 0-mA load. addition, external noise bypass capacitor connected device's CNOISE will lower LDO's output noise noise applications. Si91822 also includes out-of-regulation error flag. When output voltage below nominal output voltage, error flag output goes low. capacitor connected device's delay pin, error flag output will generate delayed power-on-reset signal. Si91822 available both standard lead (Pb)-free MSOP-8 packages specified operate over industrial temperature range
TYPICAL APPLICATIONS CIRCUITS
CNOISE DELAY VOUT CNOISE DELAY ERROR SENSE/ADJ VOUT VOUT
ERROR SENSE/ADJ VOUT
Si91822 FIGURE Fixed Output
Si91822 FIGURE Adjustable Output
CNOISE DELAY
ERROR
ON/OFF VOUT
SENSE/ADJ VOUT
Si91822
FIGURE Noise, Full Features Application
Document Number: 71671 S-51147-Rev. 20-Jun-05 www.vishay.com
Si91822
ABSOLUTE MAXIMUM RATINGS
Input Voltage, Input Voltage, -0.3 Output Current, IOUT Continuous, Short Circuit Protected Output Voltage, VOUT -0.3 VO(nom) Maximum Junction Temperature, TJ(max) 150_C Storage Temperature, TSTG -55_C 150_C (Human Body Model) Power Dissipation (Package)b 8-Pin MSOP Thermal Impedance (QJA) 8-Pin MSOPa 130_C/W Notes Device mounted with leads soldered welded board. Derate mW/_C above 25_C
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 operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
RECOMMENDED OPERATING RANGE
Input Voltage, Output Voltage, VOUT (Adjustable Version) 1.215 Input Voltage, COUT (ceramic, type) CNOISE (ceramic) COUT Range ("10%, type) COUT Operating Ambient Temperature, -40_C 85_C Operating Junction Temperature, -40_C 135_C
SPECIFICATIONS
Test Conditions Unless Otherwise Specified Parameter
Output Voltage Range Output Voltage Accuracy (Fixed Versions) Feedback Voltage (ADJ Version) Line Regulation (VADJ VOUT Line Regulation VOUT VOUT
Limits
85_C
Symbol
VOUT(nom) IOUT COUT
Tempa
Full Room Full Room Full
Minb
1.215 -1.5 -2.5 1.191 1.179 -0.18 -0.18
Typc
Maxb
Unit
O(nom)
Adjustable Version IOUT
VADJ DVOUT VOUT From VOUT VOUT From IOUT IOUT VOUT IOUT IOUT IOUT IOUT
1.215
1.239 1.251 0.18 0.18
Full Full Room Room Room Full Room Room Full Room Room Full Room Full Room Room Room Room Room Room Room Room
1000
Dropout Voltaged (@VOUT(nom)
Dropout Voltaged (@VOUT(nom)
Ground Current
IGND
IOUT IOUT
1500 1500 2800
Shutdown Supply Current Current Peak Output Current Output Noise Voltage
IIN(off) IADJ IO(peak)
VOUT 0.95 VOUT(nom), IOUT IOUT CNOISE CNOISE
(rms)
Ripple Rejection
DVOUT/DVIN
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Document Number: 71671 S-51147-Rev. 20-Jun-05
Si91822
SPECIFICATIONS
Test Conditions Unless Otherwise Specified Parameter Symbol
VOUT(nom) IOUT COUT
Limits
85_C
Tempa
Minb
Typc
Maxb
Unit
Dynamic Line Regulation Dynamic Load Regulation VOUT Turn Time Turn-On-Time
DVO(line) DVO(load)
VOUT(nom) VOUT(nom) tR/tF IOUT IOUT tR/tF VOUT CNOISE CNOISE
Room Room Room Room
Thermal Shutdown
Thermal Shutdown Junction Temp Thermal Hysteresis Short Circuit Current tJ(s/d) tHYST VHYST VOUT High Regulator (Rising) Regulator (Falling) Regulator Regulator Room Room Room
Shutdown Input
Input Voltage Input Currente Shutdown Hysteresis Full Full Room Room Full 0.01
Error Output
Output High Leakage Output Voltageg Out-of-Regulation Error Flag Threshold Voltage (Rising) Hysteresis Delay Current Source IOFF VHYST IDELAY ERROR VOUT(nom) ISINK Full Full Full Room Room 0.93 VOUT 0.95 VOUT VOUT 0.01 0.97 VOUT
Notes Room 25_C, Full 85_C. algebraic convention whereby most negative value minimum most positive maximum. Typical values DESIGN ONLY, guaranteed subject production testing. Typical values dropout voltage VOUT measured VOUT while typical values dropout voltage VOUT measured VOUT Dropout voltage defined input output differential voltage which output voltage drops below output voltage measured with differential, provided that does drop below When VOUT(nom) less than output will regulation when VOUT(nom) greater than dropout voltage specified. device's shutdown includes typical 6-MW internal pull-down resistor connected ground. VOUT defined output voltage Error Output (Low) function guaranteed w2.0
TIMING WAVEFORMS
VNOM 0.95 VNOM VOUT
ERROR tDELAY
FIGURE Timing Diagram Power-Up
Document Number: 71671 S-51147-Rev. 20-Jun-05 www.vishay.com
Si91822
CONFIGURATION
MSOP-8
CNOISE DELAY
ERROR SENSE VOUT
View
DESCRIPTION
Number
Name
CNOISE DELAY VOUT SENSE ERROR
Function
Noise bypass pin. noise applications, 0.01-mF larger ceramic capacitor should connected from this ground. Capacitor connected from this ground will allow delayed power-on-reset signal ERROR (Pin output. Refer Figure Ground pin. Local ground CNOISE COUT. Input supply pin. Bypass this with 2.2-mF ceramic tantalum capacitor ground. Output voltage. Connect COUT between this ground. fixed output voltage versions, this should connected VOUT (Pin adjustable output voltage version, this voltage feedback sets output voltage external resistor divider. This open drain output error flag output which goes when VOUT drops below nominal voltage. This also provides power-on-reset signal capacitor connected DELAY pin. applying less than this pin, device will turned off. Connect this unused.
ORDERING INFORMATION
Standard Part Number
Si91822DH-12-T1 Si91822DH-18-T1 Si91822DH-25-T1 Si91822DH-28-T1 Si91822DH-30-T1 Si91822DH-33-T1 Si91822DH-50-T1 Si91822DH-AD-T1
Lead Free Part Number
Si91822DH-12-T1-E3 Si91822DH-18-T1-E3 Si91822DH-25-T1-E3 Si91822DH-28-T1-E3 Si91822DH-30-T1-E3 Si91822DH-33-T1-E3 Si91822DH-50-T1-E3 Si91822DH-AD-T1-E3
Marking
1822 1215 1822 1800 1822 2500 1822 2800 1822 3000 1822 3300 1822 5000 1822
Voltage
1.215 1.80 2.50 2.80 3.00 3.30 5.00 Adjustable
Temperature
Package
85_C
MSOP-8 MSOP
Additional voltage options available.
Eval
Si91822DB
Temperature Range
85_C
Board Type
Surface Mount
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Document Number: 71671 S-51147-Rev. 20-Jun-05
Si91822
TYPICAL CHARACTERISTICS (INTERNALLY REGULATED, 25_C UNLESS NOTED)
Dropout Voltage Load Current
ILOAD (mA) VOUT RLOAD 16.5 VOUT IOUT IOUT Dropout Voltage (mV) IOUT IOUT IOUT Junction Temperature (_C) IOUT VOUT IOUT
Dropout Characteristic
DROP (mV)
Dropout Voltage Temperature
DROP (mV)
Dropout Voltage VOUT
Normalized Output Voltage Load Current
0.30 0.15 0.00 -0.15 -0.30 -0.45 -0.60 -0.75 Load Current (mA)
-0.0 -0.2 -0.4 -0.6
Normalized VOUT Temperature
IOUT
Output Voltage
IOUT
IOUT -0.8 -1.0 -1.2 IOUT IOUT
Junction Temperature (_C)
Document Number: 71671 S-51147-Rev. 20-Jun-05
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Si91822
TYPICAL CHARACTERISTICS (INTERNALLY REGULATED, 25_C UNLESS NOTED)
Current Load Current
VOUT -0.3 -0.6 25_C -0.9 85_C -1.2 Load Current (mA) Input Voltage 25_C -40_C
Load Current Input Voltage
-1.5
Power Supply Rejection
COUT ILOAD
2000
Current Temperature Load
VOUT IOUT
1500
Gain (dB)
1000
IOUT
IOUT
1000
10000
100000
1000000
Frequency (Hz)
Junction Temperature (_C)
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Document Number: 71671 S-51147-Rev. 20-Jun-05
Si91822
TYPICAL WAVEFORMS
Load Transient Response-1 Load Transient Response-2
VOUT mV/div VOUT mV/div ILOAD mA/div ILOAD mA/div
5.00 ms/div
VOUT COUT ILOAD trise msec
5.00 ms/div
VOUT COUT ILOAD tfall msec
Load Transient Response-3
Load Transient Response-4
VOUT mV/div VOUT mV/div ILOAD mA/div ILOAD mA/div
5.00 ms/div
VOUT COUT ILOAD trise msec
5.00 ms/div
VOUT COUT ILOAD tfall msec
LineTransient Response-1
VOUT V/div V/div
LineTransient Respons-2
VOUT mV/div
VOUT mV/div
5.00 ms/div
VINSTEP VOUT COUT ILOAD trise msec
5.00 ms/div
VINSTEP VOUT COUT ILOAD tfall msec
Document Number: 71671 S-51147-Rev. 20-Jun-05
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Si91822
TYPICAL WAVEFORMS
Turn-On Sequence Turn-Off Sequence
CH-3 V/div V/div VOUT V/div VOUT CH-1 V/div
Cdelay V/div ERROR V/div
Cdelay CH-4 V/div ERROR CH-2 V/div VOUT Cdelay CNOISE ILOAD 5.00 ms/div VOUT Cdelay CNOISE ILOAD
10.00 ms/div
Output Noise
10.0
Noise Spectrum
mV/div
0.01 ms/div VOUT IOUT CNOISE VOUT V/10 CNOISE
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Document Number: 71671 S-51147-Rev. 20-Jun-05
Si91822
BLOCK DIAGRAMS
Switches shown device normal operating mode HIGH) SENSE CNOISE
RFB2 RFB1
COUT CDELAY REXT
VOUT
ERROR
1.215 VREF
FIGURE 300-mA CMOS Regulator (Fixed Output)
CNOISE
VADJ
COUT CDELAY REXT
VOUT
ERROR
1.215 VREF
FIGURE 300-mA CMOS Regulator (Adjustable Output)
Document Number: 71671 S-51147-Rev. 20-Jun-05
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Si91822
DETAILED DESCRIPTION
Si91822 drop out, quiescent current, very linear regulator family with very fast transient response. primarily designed battery powered applications where battery time premium. quiescent current allows extended standby time while drop voltage enables system fully utilize battery power before recharge. Si91822 very fast regulator with bandwidth exceeding while maintaining quiescent current light load conditions. With this bandwidth, Si91822 fastest available today. Si91822 stable with output capacitor type from 10.0 However, ceramic capacitors recommended best output noise transient performance. input supply pin. bypass capacitor this critical long input supply enough source impedance. practical circuits, 1.0-mF larger ceramic capacitor recommended. When source impedance enough and/or source several inches from Si91822, then larger input bypass capacitor needed. required that equivalent impedance (source impedance, wire, trace impedance parallel with input bypass capacitor impedance) must smaller than input impedance Si91822 stable operation. When source impedance, wire, trace impedance unknown, recommended that input bypass capacitor used value that equal greater than output capacitor. VOUT VOUT output voltage regulator. Connect bypass capacitor from VOUT ground. output capacitor value from 10.0 ceramic capacitor with dielectric type recommended best output noise, line transient, load transient performance. Ground common ground connection VOUT. also local ground connection CNOISE, DELAY, SENSE ADJ, SENSE SENSE used sense output voltage. Connect SENSE VOUT fixed voltage version. adjustable output version, resistor divider connect from VOUT from ground. should 25-kW 150-kW range power consumption, while maintaining adequate noise immunity.
Tdelay VADJ Cdelay Idelay
formula below calculates value given desired output voltage value,
VADJ VADJ
VADJ nominally 1.215
SHUTDOWN (SD) controls turning Si91822. VOUT guaranteed when voltage equals greater than VOUT guaranteed when theSD voltage equals less than During shutdown mode, Si91822 will draw less than 2-mA current from source. automatically turn VOUT whenever input applied, VIN. ERROR ERROR open drain output that goes when VOUT less than normal value. with open drain output, external pull resistor needed. When capacitor connected from DELAY GROUND, error signal transition from high delayed (see Delay section). This delayed error signal used power-on reset signal application system. (Refer Figure ERROR disconnected used. DELAY capacitor from DELAY GROUND sets time delay ERROR going from high state. time delay calculated using following formula:
DELAY should open circuit used. CNOISE noise application, connect high frequency ceramic capacitor from CNOISE ground. 0.01-mF 0.1-mF recommended.
Vishay Siliconix maintains worldwide manufacturing capability. Products manufactured several qualified locations. Reliability data Silicon Technology Package Reliability represent composite qualified locations. related documents such package/tape drawings, part marking, reliability data, www.vishay.com Document Number: 71671 S-51147-Rev. 20-Jun-05
Legal Disclaimer Notice
Vishay
Notice
Specifications products displayed herein subject change without notice. Vishay Intertechnology, Inc., anyone behalf, assumes responsibility liability errors inaccuracies. Information contained herein intended provide product description only. license, express implied, estoppel otherwise, intellectual property rights granted this document. Except provided Vishay's terms conditions sale such products, Vishay assumes liability whatsoever, disclaims express implied warranty, relating sale and/or Vishay products including liability warranties relating fitness particular purpose, merchantability, infringement patent, copyright, other intellectual property right. products shown herein designed medical, life-saving, life-sustaining applications. Customers using selling these products such applications their risk agree fully indemnify Vishay damages resulting from such improper sale.
Document Number: 91000 Revision: 08-Apr-05
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Micropower 300-mA CMOS Regulator With Error Flag/Power-On-Reset 1

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