ADP3331(RevA) Просмотр технического описания (PDF) - Analog Devices
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ADP3331
(Rev.:RevA)
(Rev.:RevA)
Analog Devices
ADP3331 Datasheet PDF : 12 Pages
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a Adjustable Output Ultralow IQ, 200 mA,
SOT-23, anyCAP® Low Dropout Regulator
ADP3331
FEATURES
High Accuracy over Line and Load: ؎0.7% @ 25؇C,
1.4% over Temperature
Ultralow Dropout Voltage: 140 mV (Typ) @ 200 mA
Can Be Used as a High Current (>1 A) LDO
Controller
Requires Only CO = 0.47 F for Stability
anyCAP = Stable with Any Type of Capacitor
(Including MLCC)
Current and Thermal Limiting
Low Noise
Low Shutdown Current: 10 nA Typical
2.6 V to 12 V Supply Range
1.5 V to 11.75 V Output Range
–40؇C to +85؇C Ambient Temperature Range
Ultrasmall Thermally Enhanced Chip-on-Lead™
SOT-23-6 Lead Package
APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery-Powered Systems
PCMCIA Regulators
Bar Code Scanners
Camcorders, Cameras
FUNCTIONAL BLOCK DIAGRAM
IN
ERR
SD
THERMAL
PROTECTION
Q2
Q1
CC
DRIVER
ADP3331
gm
BAND GAP
REF
OUT
FB
GND
VIN
C1 +
0.47F
ERR
ADP3331
OUT
IN
FB
SD
GND
6
4
ON
OFF
R3
330k⍀
R1
R2
EOUT
VOUT
+ C2
0.47F
Figure 1. Typical Application Circuit
GENERAL DESCRIPTION
The ADP3331 is a member of the ADP330x family of precision
low dropout anyCAP voltage regulators. The ADP3331 operates
with an input voltage range of 2.6 V to 12 V and delivers a load
current up to 200 mA. The ADP3331 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 0.47 mF output capacitor for stability. This device is insensi-
tive to capacitor equivalent series resistance (ESR), and is stable
with any good quality capacitor, including ceramic (MLCC) types
for space restricted applications. The ADP3331 achieves excep-
tional accuracy of ± 0.7% at room temperature and ± 1.4% overall
accuracy over temperature, line, and load variations. The drop-
out voltage of the ADP3331 is only 140 mV (typical) at 200 mA.
This device also includes a safety current limit, thermal over-
load protection, and a shutdown feature. In shutdown mode, the
ground current is reduced to less than 2 mA. The ADP3331 has
ultralow quiescent current 34 mA (typical) in light load situations.
The SOT-23-6 package has been thermally enhanced using
Analog Device’s proprietary Chip-on-Lead feature to maxi-
mize power dissipation.
REV. A
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
registered trademarks are the property of their respective companies.
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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