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Analog Devices - High Accuracy Ultralow IQ/ 500 mA anyCAP Low Dropout Regulator

Numéro de référence ADP3335
Description High Accuracy Ultralow IQ/ 500 mA anyCAP Low Dropout Regulator
Fabricant Analog Devices 
Logo Analog Devices 





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ADP3335 fiche technique
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High Accuracy Ultralow IQ, 500 mA
anyCAP® Low Dropout Regulator
ADP3335
FEATURES
High Accuracy Over Line and Load: ؎0.9% @ 25؇C,
؎1.8% Over Temperature
Ultralow Dropout Voltage: 200 mV (Typ) @ 500 mA
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
2.6 V to 12 V Supply Range
–40؇C to +85؇C Ambient Temperature Range
Ultrasmall Thermally-Enhanced 8-Lead MSOP Package
APPLICATIONS
PCMCIA Card
Cellular Phones
Camcorders, Cameras
Networking Systems, DSL/Cable Modems
Cable Set-Top Box
MP3/CD Players
DSP Supply
GENERAL DESCRIPTION
The ADP3335 is a member of the ADP330x family of precision
low dropout anyCAP voltage regulators. The ADP3335 operates
with an input voltage range of 2.6 V to 12 V and delivers a con-
tinuous load current up to 500 mA. The ADP3335 stands out
from conventional LDOs with the lowest thermal resistance of
any MSOP-8 package and an enhanced process that enables it
to offer performance advantages beyond its competition. Its
patented design requires only a 1.0 µF output capacitor for sta-
bility. 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 ADP3335 achieves exceptional accuracy of
± 0.9% at room temperature and ± 1.8% over temperature, line,
and load. The dropout voltage of the ADP3335 is only 200 mV
(typical) at 500 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
1 µA. The ADP3335 has ultralow quiescent current 80 µA
(typical) in light load situations.
IN
SD
FUNCTIONAL BLOCK DIAGRAM
THERMAL
PROTECTION
Q1
CC
DRIVER
ADP3335
gm
BANDGAP
REF
OUT
R1
NR
R2
GND
VIN
C IN
1F
+
NR
ADP3335
OUT
IN OUT
IN OUT
SD GND
ON
OFF
VOUT
+ COUT
1F
Figure 1. Typical Application Circuit
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
which 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 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000

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