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參數(shù)資料
| 型號(hào)： | ADP3331ART |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | 1.5 V-11.75 V ADJUSTABLE POSITIVE LDO REGULATOR, 0.23 V DROPOUT, PDSO6 |
| 封裝： | THERMALLY ENHANCED, SOT-23, 6 PIN |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 135K |
| 代理商： | ADP3331ART |
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
ADP3331
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1999
Adjustable Output Ultralow I
Q
, 200 mA,
SOT-23, anyCAP Low Dropout Regulator
FUNCTIONAL BLOCK DIAGRAM
THERMAL
PROTECTION
CC
IN
ADP3331
OUT
GND
Q1
SD
BANDGAP
REF
DRIVER
g
m
ERR
FB
Q2
FEATURES
High Accuracy Over Line and Load:
6
0.7% @ +25
8
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 C
O
= 0.47
m
F for Stability
anyCAP = Stable with Any Type of Capacitor
(Including MLCC)
Current and Thermal Limiting
Low Noise
Low Shutdown Current: <2
m
A
2.6 V to 12 V Supply Range
1.5 V to 10 V Output Range
–40
8
C to +85
8
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 Regulator
Bar Code Scanners
Camcorders, Cameras
GENERAL DESCRIPTION
The ADP3331 is a member of the ADP330x family of preci-
sion low dropout anyCAP voltage regulators. The ADP3331
operates with an input voltage range of 2.6 V to 12 V and deliv-
ers 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 advan-
tages and higher output current than its competition. Its pat-
ented design requires only a 0.47
μ
F output capacitor for
stability. This device is insensitive 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 exceptional accuracy of
±
0.7% at room temperature and
±
1.4% overall accuracy over
temperature, line and load variations. The dropout voltage of
the ADP3331 is only 140 mV (typical) at 200 mA. This device
also includes a safety current limit, thermal overload protection
and a shutdown feature. In shutdown mode, the ground current is
reduced to less than 2
μ
A. The ADP3331 has ultralow quies-
cent current 34
μ
A (typical) in light load situations. The
SOT-23-6 package has been thermally enhanced using Analog
Device’s proprietary Chip-on-Lead feature to maximize power
dissipation.
anyCAP and Chip-on-Lead are trademarks of Analog Devices, Inc.
V
OUT
V
IN
+
ADP3331
FB
OUT
ERR
ON
OFF
SD
GND
IN
C2
0.47
m
F
C1
0.47
m
F
+
E
OUT
R3
330k
V
R1
R2
Figure 1. Typical Application Circuit
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