High Precision anyCAP™
Dual Low Dropout Linear Regulator
a
ADP3302
FEATURES
High Accuracy: ؎0.8%
FUNCTIONAL BLOCK DIAGRAM
(1/2 IS SHOWN)
Ultralow Dropout Voltage: 120 mV @ 100 mA Typical
Requires only CO = 0.47 F 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
ADP3302
Q1
OUT
IN
R1
R2
THERMAL
PROTECTION
CC
ERR
DRIVER
Q2
GM
SD
BANDGAP
REF
APPLICATIONS
Cellular Telephones
GND
Notebook and Palmtop Computers
Battery Powered Systems
Portable Instruments
High Efficiency Linear Regulators
E
OUT
2
330kΩ
GENERAL DESCRIPTION
ERR
V
IN
5
IN
1
4
V
OUT1
OUT1
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.
0.47µF
8
IN
0.47µF
ADP3302
3
GND
OUT2
V
OUT2
SD1
7
SD2
6
0.47µF
The ADP3302 has a wide input voltage range from ؉3 V to
؉12 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.
ON
OFF
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.
Figure 1. Application Circuit
anyCAP™ is a trademark of Analog Devices, Inc.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
World Wide Web Site: http://www.analog.com
© Analog Devices, Inc., 1997