a
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
+5 V Fixed, Adjustable
Low-Dropout Linear Voltage Regulator
ADP667
FUNCTIONAL BLOCK DIAGRAM
IN
OUT
DD
ADP667
SHDN
A1
SET
LBO
C2
LBI
GND
1.255V
REF
50mV
C1
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
µA)
in conjunc-
tion 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.
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.
Model
TYPICAL OPERATING CIRCUIT
+6V
INPUT
+
IN
OUT
+
ADP667
SET GND SHDN
C1
10µF
+5V
OUTPUT
ORDERING GUIDE
Temperature
Range
–40°C to +85°C
–40°C to +85°C
Package
Description
Package
Option
ADP667AN
ADP667AR
8-Pin Plastic DIP N-8
8-Lead SOIC
SO-8
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.
© 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
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