ADP3303A Analog Devices, ADP3303A Datasheet

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ADP3303A

Manufacturer Part Number
ADP3303A
Description
High Accuracy anyCAP Adjustable 200 mA Low Dropout Linear Regulator
Manufacturer
Analog Devices
Datasheet

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a
GENERAL DESCRIPTION
The ADP3303A is a member of the ADP330x family of preci-
sion low dropout anyCAP voltage regulators. The ADP3303A
stands out from conventional LDOs with a novel architecture,
an enhanced process and a new package. Its patented design
requires only a 1 F output capacitor for stability. This device is
insensitive to output capacitor ESR (Equivalent Series Resis-
tance), and is stable with any good quality capacitor, including
ceramic types (MLCC) for space restricted applications. The
ADP3303A achieves exceptional accuracy of 0.8% at room
temperature and 1.4% overall accuracy over temperature, line
and load variations. The dropout voltage of the ADP3303A is
only 150 mV (typical) at 200 mA.
anyCAP is a trademark of Analog Devices Inc.
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
High Accuracy Over Line and Load:
Ultralow Dropout Voltage: 150 mV Typical @ 200 mA
Requires Only C
anyCAP = Stable with All Types of Capacitors
Current and Thermal Limiting
Low Noise
Dropout Detector
Low Shutdown Current: 1 A
3.2 V to 12 V Supply Range
Adjustable 2.2 V to 10 V Output Range
–20 C to +85 C Ambient Temperature Range
Thermally Enhanced TSSOP-14 Package
APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery Powered Systems
Portable Instruments
Post Regulator for Switching Supplies
Bar Code Scanners
(Including MLCC)
0.8% @ +25 C,
O
= 1 F for Stability
1.4% Over Temperature
200 mA Low Dropout Linear Regulator
High Accuracy anyCAP™ Adjustable
In addition to the new architecture and process, ADI’s new
proprietary thermally enhanced package (Thermal Coastline)
can handle 1 W of power dissipation without an external heat
sink or large copper surface on the PC board. This keeps PC
board real estate to a minimum and makes the ADP3303A very
attractive for use in portable equipment.
The ADP3303A operates over an input voltage range of 3.2 V
to 12 V and delivers a load current in excess of 200 mA. The
output voltage can be adjusted from 2.2 V to 10 V using an
external resistor divider. It also features an error flag that signals
when the device is about to lose regulation or when the short
circuit or thermal overload protection is activated. Other fea-
tures include shutdown and optional noise reduction capabilities.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
V
ERR
IN
0.47 F
SD
IN
C1
Q2
Figure 1. Typical Application Circuit
FUNCTIONAL BLOCK DIAGRAM
PROTECTION
THERMAL
IN
SD
SD
ADP3303A
OFF
World Wide Web Site: http://www.analog.com
ON
ERR
GND
OUT
DRIVER
FB
GND
Q1
R2
R3
330k
R1
BANDGAP
© Analog Devices, Inc., 1999
CC
ADP3303A
g
m
REF
ADP3303A
C2
1 F
E
V
OUT
OUT
= +5V
OUT
FB

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