ADP3334(Rev0) View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
ADP3334
(Rev.:Rev0)
(Rev.:Rev0)
Analog Devices
ADP3334 Datasheet PDF : 8 Pages
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a High Accuracy Low IQ, 500 mA
anyCAP® Adjustable Low Dropout Regulator
FEATURES
High Accuracy Over Line and Load: ؎0.9% @ 25؇C,
ØŽ1.8% over Temperature
Ultralow Dropout Voltage: 200 mV (Typ) @ 500 mA
Requires Only CO = 1.0 â®F for Stability
anyCAP = Stable with Any Type of Capacitor
(Including MLCC)
Current and Thermal Limiting
Low Noise
Low Shutdown Current: < 1.0 â®A (Typ)
2.6 V to 11 V Supply Range
1.5 V to 10 V Output Range
–40؇C to +85؇C Ambient Temperature Range
Thermally-Enhanced 8-Lead SO Package
APPLICATIONS
Cellular Phones
Camcorders, Cameras
Networking Systems, DSL/Cable Modems
Cable Set-Top Boxes
DSP Supplies
Personal Digital Assistants
ADP3334
FUNCTIONAL BLOCK DIAGRAM
IN
Q1
THERMAL
PROTECTION
CC
DRIVER
SD
OUT
ADP3334
FB
gm
BANDGAP
REF
GND
GENERAL DESCRIPTION
The ADP3334 is a member of the ADP333x family of precision
low dropout anyCAP voltage regulators. The ADP3334 operates
with an input voltage range of 2.6 V to 11 V and delivers a
continuous load current up to 500 mA. The novel anyCAP
architecture requires only a very small 1 µF output capacitor for
stability, and the LDO is insensitive to the capacitor’s equiva-
lent series resistance (ESR). This makes ADP3334 stable with any
capacitor, including ceramic (MLCC) types for space restricted
applications.
The ADP3334 achieves exceptional accuracy of ± 0.9% at room
temperature and ± 1.8% over temperature, line, and load. The
dropout voltage of the ADP3334 is only 200 mV (typical) at
500 mA. This device also includes a safety current limit, ther-
mal overload protection and a shutdown feature. In shutdown
mode, the ground current is reduced to less than 1 µA. The
ADP3334 has low quiescent current 90 µA (typical) in light
load situations.
VIN
CIN
1â®F
ADP3334
IN
OUT
IN
OUT
SD
OFF
ON
FB
GND
R1
CNR
R2
VOUT
COUT
1â®F
Figure 1. Typical Application Circuit
The ADP3334 also features ADI’s thermally enhanced Thermal
Coastline package. This allows 1 W of power dissipation without
any external heat sinking.
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, nor for any infringements of patents or other rights of third parties that
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
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001
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