®
High-Accuracy Ultralow IQ, 1 A, anyCAP
a
Low Dropout Regulator
ADP3338
FUNCTIONAL BLOCK DIAGRAM
FEATURES
High Accuracy Over Line and Load: ꢀ0.8% @ 25ꢁC,
ꢀ1.4% Over Temperature
Ultralow Dropout Voltage: 190 mV (Typ) @ 1 A
Requires Only CO = 1 ꢂF for Stability
anyCAP = Stable with Any Type of Capacitor
(Including MLCC)
Q1
OUT
IN
ADP3338
R1
R2
THERMAL
PROTECTION
CC
g
DRIVER
m
Current and Thermal Limiting
Low Noise
BANDGAP
REF
2.7 V to 8 V Supply Range
–40ꢁC to +85ꢁC Ambient Temperature Range
SOT-223 Package
GND
APPLICATIONS
Notebook, Palmtop Computers
SCSI Terminators
Battery-Powered Systems
Bar Code Scanners
Camcorders, Cameras
Home Entertainment Systems
Networking Systems
DSP/ASIC Supply
GENERAL DESCRIPTION
ADP3338
The ADP3338 is a member of the ADP33xx family of precision
low dropout anyCAP voltage regulators. The ADP3338 oper-
ates with an input voltage range of 2.7 V to 8 V and delivers a
load current up to 1 A. The ADP3338 stands out from the
conventional LDOs with a novel architecture and an enhanced
process that enables it to offer performance advantages and
higher output current than its competition. Its patented design
requires only a 1 µF output capacitor for stability. This device
is insensitive to output capacitor Equivalent Series Resistance
(ESR), and is stable with any good quality capacitor, including
ceramic (MLCC) types for space-restricted applications. The
ADP3338 achieves exceptional accuracy of 0.8% at room
temperature and 1.4% over temperature, line and load varia-
tions. The dropout voltage of the ADP3338 is only 190 mV
(typical) at 1 A. This device also includes a safety current limit
and thermal overload protection. The ADP3338 has ultralow
quiescent current 110 µA (typical) in light load situations.
V
IN
V
OUT
OUT
IN
1ꢂF
1ꢂF
GND
Figure 1. Typical Application Circuit
anyCAP is a registered 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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
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: 781/329-4700
Fax: 781/326-8703
www.analog.com
© Analog Devices, Inc., 2001