ADP3342 Просмотр технического описания (PDF) - Analog Devices
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ADP3342 Datasheet PDF : 8 Pages
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FEATURES
Accuracy Over Line and Load: ؎4.0% @ 25؇C,
؎5% Over Temperature
Ultralow Dropout Voltage: 300 mV (Typ) @ 300 mA
Requires Only CO = 1.0 F for Stability
anyCAP = Stable with any Type of Capacitor
(including MLCC)
Current and Thermal Limiting
Low Shutdown Current: < 2 A
1.7 V Յ VIN Յ 6 V
2.8 V Յ VCC Յ 6 V
VOUT = 1.2 V ؎5%
–40؇C to +100؇C Ambient Temperature Range
Ultrasmall Thermally Enhanced 8-Lead MSOP Package
APPLICATIONS
Notebook PCs
Desktop PCs
Ultralow, IQ, anyCAP®
Low Dropout Regulator
ADP3342
FUNCTIONAL BLOCK DIAGRAM
IN
VCC
PWRGD
SD
Q1
THERMAL
CC
PROTECTION
DRIVER
gm
ADP3342
BANDGAP +
REF –
GND
OUT
GENERAL DESCRIPTION
The ADP3342 is a unique member of the ADP330x family of
precision low dropout anyCAP voltage regulators. The ADP3342
operates with an input voltage range of 1.7 V to 6 V and delivers
a continuous load current up to 300 mA. In order to support the
ability to regulate from such a low input voltage, the power rail
to the IC, VCC, has been split off from the main power rail, VIN,
from which the output is powered.
The ADP3342 stands out from the 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 stability. 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 dropout voltage of the ADP3342 is
only 190 mV (typical) at 300 mA. This device also includes a
safety current limit, thermal overload protection and a shutdown
control pin.
3.3V
VIN
1.8V
1F
ON
OFF
VCC
ADP3342
IN
OUT
IN
OUT
SD PWRGD
GND
VOUT
+
1.2V
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 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., 2002
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