ADP667

ADP667 (Rev. A)

Document overview

• Manufacturer or author: Analog Devices, Inc.
• PDF pages: 12

Technical content

Tel: 617/329-4700 Fax: 617/326-8703 FUNCTIONAL BLOCK DIAGRAM ADP667 IN SHDN LBO LBI GND 50mV SET DD OUT 1.255V REF REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a +5 V Fixed, Adjustable Low-Dropout Linear Voltage Regulator ADP667

FEATURES

Low-Dropout: 150 mV @ 200 mA Low Power CMOS: 20 m A Quiescent Current Shutdown Mode: 0.2 m A Quiescent Current 250 mA Output Current Pin Compatible with MAX667 Stable with 10 m F Load Capacitor Low Battery Detector Fixed +5 V or Adjustable Output +3.5 V to +16.5 V Input Range Dropout Detector Output

APPLICATIONS

High Efficiency Linear Power Supplies GENERAL DESCRIPTION The ADP667 is a low-dropout precision voltage regulator that can supply up to 250 mA output current. It can be used to give a fixed +5 V output with no additional external components or can be adjusted from +1.3 V to +16 V using two external resis- tors. Fixed or adjustable operation is automatically selected via the SET input. The low quiescent current (20 mA) in conjunc- tion with the standby or shutdown mode (0.2 mA) makes this device especially suitable for battery powered systems. The dropout voltage when supplying 100 mA is only 5 mV allowing operation with minimal headroom and prolonging the battery useful life. At higher output current levels the dropout remains low increasing to just 150 mV when supplying 200 mA. A wide input voltage range from 3.5 V to 16.5 V is allowable. Additional features include a dropout detector and a low supply/ battery monitoring comparator. The dropout detector can be used to signal loss of regulation, while the low battery detector can be used to monitor the input supply voltage. The ADP667 is a pin-compatible replacement for the MAX667. It is specified over the industrial temperature range –40 °C to +85°C and is available in an 8-pin DIP and in narrow surface mount (SOIC) packages. ORDERING GUIDE Temperature Package Package Model Range Description Option ADP667AN –40 °C to +85°C 8-Pin Plastic DIP N-8 ADP667AR –40 °C to +85°C 8-Lead SOIC SO-8 TYPICAL OPERATING CIRCUIT IN OUT GNDSET SHDN ADP667 +5V OUTPUTC1 10µF ++6V INPUT © Analog Devices, Inc., 1995

ADP667–SPECIFICATIONS REV. 0 Parameter Min Typ Max Units Test Conditions/Comments Input Voltage, VIN 3.5 16.5 V Output Voltage, VOUT 4.8 5.0 5.2 V V SET = 0 V, VIN = 6 V, IOUT = 10 mA Maximum Output Current 250 mA V IN = +6 V, +4.5 V < VOUT < +5.5 V Quiescent Current IGND: Shutdown Mode 0.2 1 mAV SHDN = 2 V, TA = +25°C 2 mAT A = TMIN to TMAX IGND: Normal Mode V SHDN = 0 V, VSET = 0 V, TA = +25°C 20 25 mAI OUT = 0 mA 20 30 mAI OUT = 100 mA 51 5m A I OUT = 200 mA TA = TMIN to TMAX 35 mAI OUT = 0 mA 50 mAI OUT = 100 mA 20 mA I OUT = 200 mA Dropout Voltage 5 60 mV I OUT = 100 mA, TA = +25°C 75 mV T A = TMIN to TMAX 150 250 mV I OUT = 200 mA, TA = +25°C 350 mV T A = TMIN to TMAX Load Regulation 50 100 mV I OUT = 10 mA–200 mA, VIN = 6 V, TA = +25°C 250 mV T A = TMIN to TMAX Line Regulation 5 10 mV V IN = 6 V to 10 V, IOUT = 10 mA, TA = +25°C 15 mV T A = TMIN to TMAX SET Reference Voltage, V SET 1.23 1.255 1.28 V SET Input Leakage Current, I SET – 0.01 – 10 nA V SET = 1.5 V, TA = +25°C – 1000 nA T A = TMIN to TMAX Output Leakage Current, I OUT 0.1 1 mAV SHDN = 2 V Short-Circuit Current, I OUT 400 mA T A = +25°C 450 mA T A = TMIN to TMAX Low Battery Detector Input Threshold, V LBI 1.215 1.255 1.295 V LBI Input Leakage Current, I LBI – 0.01 – 10 nA V LBI = 1.5 V, TA = +25°C – 1000 nA T A = TMIN to TMAX Low Battery Detector Output Voltage, V LBO 0.25 V V LBI < 1.215 V, ILBO = 10 mA, TA = +25°C

0.40 V T A = TMIN to TMAX

Shutdown Input Threshold Voltage, V SHDN 1.5 V Shutdown Input Leakage Current, I SHDN – 0.01 – 10 nA V SHDN = 0 V to VIN, TA = +25°C – 1000 nA T A = TMIN to TMAX Dropout Detector Output Voltage 0.25 V (V SET = 0 V, VSHDN = 0 V, RDD = 100 kW VIN = 7 V, IOUT = 10 mA) 4.0 (V SET = 0 V, VSHDN = 0 V, RDD = 100 kW VIN = 4.5 V, IOUT = 10 mA) Specifications subject to change without notice. ABSOLUTE MAXIMUM RATINGS* (TA= +25°C unless otherwise noted) OUT (Derate 8.3 mW/°C above +50°C) (Derate 6 mW/°C above +50°C) Operating Temperature Range *This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specifica- tion is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. –2– (VIN = +9 V, GND = 0 V, V OUT = +5 V, CL = 10 mF, TA = TMIN to TMAX unless otherwise noted)

which sources current as dropout is reached. VIN Voltage Regulator Input. GND Ground Pin. Must be connected to 0 V. LBI Low Battery Detect Input. Compared with 1.255 V. that goes low when LBI is below the threshold. so that the power consumption is minimized. different values of load current. is dropping out of regulation. series PNP output pass transistor. pin, and external resistors are used to set the output voltage. voltage gives 1.255 V at the SET input. power dissipation is not exceeded. may be set using a suitable voltage divider connected to LBI. error amplifier and hence the voltage output is also available. The supply current in shutdown is less than 1 mA. Figure 1. ADP667 Functional Block Diagram

REVISION HISTORY

2/14—Rev. 0 to Rev. A

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