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
ADP3302
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 World Wide Web Site: http://www.analog.com
Fax: 617/326-8703 © Analog Devices, Inc., 1997
High Precision anyCAP™
Dual Low Dropout Linear Regulator
FUNCTIONAL BLOCK DIAGRAM
(1/2 IS SHOWN)
Q2
THERMAL
PROTECTION
GM
Q1
CC
BANDGAP
REF
DRIVER
R1
R2
ADP3302
OUTIN
ERR
SD
GND
ADP3302
7 6
2
OUT1
IN
1
5
ERR
330kΩ
E
OUT
0.47µF
V
OUT1
ON
OFF
0.47µF
8
V
IN
GND
SD1
3
IN
4OUT2
0.47µF
V
OUT2
SD2
Figure 1. Application Circuit
FEATURES
High Accuracy: 60.8%
Ultralow Dropout Voltage: 120 mV @ 100 mA Typical
Requires only C
O
= 0.47 mF for Stability
anyCAP™ = Stable with All Types of Capacitors
Current and Thermal Limiting
Low Noise
Dropout Detector
Multiple Voltage Options
Thermally Enhanced SO-8 Package
APPLICATIONS
Cellular Telephones
Notebook and Palmtop Computers
Battery Powered Systems
Portable Instruments
High Efficiency Linear Regulators
GENERAL DESCRIPTION
The ADP3302 is a member of the ADP330X family of precision
micropower low dropout anyCAP™ regulators. The ADP3302
contains two fully independent 100 mA regulators with separate
shutdown and merged error outputs. It features 1.4% overall
output accuracy and very low, 120 mV typical, dropout voltage.
The ADP3302 has a wide input voltage range from 13 V to
112 V. It features an error flag that signals when either of the
two regulators is about to lose regulation. It has short circuit
current protection as well as thermal shutdown.
The ADP3302’s enhanced lead frame design allows for a maxi-
mum power dissipation of 630 mW @ +70°C ambient temperature
and 1.0 W at room temperature without any external heat sink.
anyCAP™ is a trademark of Analog Devices, Inc.