REV.0
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a
ADP3338
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2001
High-Accuracy Ultralow I
Q
, 1 A, anyCAP
®
Low Dropout Regulator
FEATURES
High Accuracy Over Line and Load: H115500.8% @ 25H11543C,
H115501.4% Over Temperature
Ultralow Dropout Voltage: 190 mV (Typ) @ 1 A
Requires Only C
O
= 1 H9262F for Stability
anyCAP = Stable with Any Type of Capacitor
(Including MLCC)
Current and Thermal Limiting
Low Noise
2.7 V to 8 V Supply Range
–40H11543C to +85H11543C Ambient Temperature Range
SOT-223 Package
APPLICATIONS
Notebook, Palmtop Computers
SCSI Terminators
Battery-Powered Systems
Bar Code Scanners
Camcorders, Cameras
Home Entertainment Systems
Networking Systems
DSP/ASIC Supply
GENERAL DESCRIPTION
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.
anyCAP is a registered trademark of Analog Devices Inc.
V
IN
OUT
ADP3338
1H9262F 1H9262F
V
OUT
GND
IN
Figure 1. Typical Application Circuit
FUNCTIONAL BLOCK DIAGRAM
THERMAL
PROTECTION
CC
IN
ADP3338
OUT
R1
R2
GND
Q1
BANDGAP
REF
DRIVER
g
m