ADP3334 데이터 시트보기 (PDF) - Analog Devices
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ADP3334 Datasheet PDF : 12 Pages
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FEATURES
High Accuracy over Line and Load: ؎0.9% @ 25؇C,
؎1.8% over Temperature
500 mA Current Capability
Ultralow Dropout Voltage
Requires Only CO = 1.0 F for Stability
anyCAP = Stable with Any Type of Capacitor
(Including MLCC)
Current and Thermal Limiting
Low Noise
Low Shutdown Current: < 1.0 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
APPLICATIONS
Cellular Phones
TFT LCD Modules
Camcorders, Cameras
Networking Systems, DSL/Cable Modems
Cable Set-Top Boxes
DSP Supplies
Personal Digital Assistants
High Accuracy, Low IQ, anyCAP®
Adjustable Low Dropout Regulator
ADP3334
FUNCTIONAL BLOCK DIAGRAM
IN
Q1
OUT
THERMAL
PROTECTION
ADP3334
CC
FB
DRIVER
gm
SD
BAND GAP
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 equivalent
series resistance (ESR). This makes the 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 of 90 µA (typical) in light
load situations.
The ADP3334 is available in three different package options:
1. Excellent thermal capability, space saving 3 mm ϫ 3 mm LFCSP.
2. Popular low profile MSOP-8.
3. Traditional thermal enhanced SOIC-8.
VIN
CIN
1F
ADP3334
IN
OUT
IN
OUT
SD
OFF
ON
FB
GND
R1
CNR
R2
VOUT
COUT
1F
Figure 1. Typical Application Circuit
REV. B
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. Trademarks and
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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 © 2003 Analog Devices, Inc. All rights reserved.
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