a
+5 V Fixed, Adjustable
Low-Dropout Linear Voltage Regulator
ADP667
FEATURES
Low-Dropout: 150 mV @ 200 mA
Low Power CMOS: 20 µA Quiescent Current
Shutdown Mode: 0.2 µA Quiescent Current
250 mA Output Current
Pin Compatible with MAX667
Stable with 10 µF Load Capacitor
Low Battery Detector
Fixed +5 V or Adjustable Output
+3.5 V to +16.5 V Input Range
Dropout Detector Output
APPLICATIONS
Handheld Instruments
Cellular Telephones
Battery Operated Devices
Portable Equipment
Solar Powered Instruments
High Efficiency Linear Power Supplies
FUNCTIONAL BLOCK DIAGRAM
OUT
IN
SHDN
A1
SET
C1
LBO
C2
1.255V
REF
LBI
TYPICAL OPERATING CIRCUIT
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 resistors. Fixed or adjustable operation is automatically selected via
the SET input. The low quiescent current (20 µA) in conjunction with the standby or shutdown mode (0.2 µA) makes this
device especially suitable for battery powered systems. The
dropout voltage when supplying 100 µA 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.
+6V
INPUT
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.
+
OUT
IN
+
ADP667
C1
10µF
+5V
OUTPUT
SET GND SHDN
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.
REV. 0
50mV
GND
GENERAL DESCRIPTION
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.
DD
ADP667
ORDERING GUIDE
Model
Temperature
Range
Package
Description
Package
Option
ADP667AN
ADP667AR
–40°C to +85°C
–40°C to +85°C
8-Pin Plastic DIP N-8
8-Lead SOIC
SO-8
© Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
