a
High Accuracy anyCAP™
200 mA Low Dropout Linear Regulator
ADP3303
FEATURES
High Accuracy Over Line and Load ؎0.8% @ at +25؇C,
؎1.4% Over Temperature
Ultralow Dropout Voltage: 180 mV (Typ) @ 200 mA
Requires Only CO = 0.47 F for Stability
anyCAP = Stable with All Types of Capacitors
(Including MLCC)
3.2 V to 12 V Supply Range
Current and Thermal Limiting
Low Noise
Dropout Detector
Low Shutdown Current: < 1 A
Thermally Enhanced SO-8 Package
Excellent Line and Load Regulation Performance
APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery Powered Systems
Portable Instruments
Post Regulator for Switching Supplies
Bar Code Scanners
FUNCTIONAL BLOCK DIAGRAM
ADP3303
Q1
IN
THERMAL
PROTECTION
ERR
OUT
R1
CC
DRIVER
Q2
gm
SD
R2
BANDGAP
REF
GND
NR 3
ADP3303-5.0
VIN
7
8
IN
OUT
1
VOUT = +5V
2
330k⍀
C1
0.47F
ERR 6
SD
GND
5
EOUT
C2
0.47F
4
ON
OFF
GENERAL DESCRIPTION
The ADP3303 is a member of the ADP330x family of precision low dropout anyCAP voltage regulators. The ADP3303
stands out from the conventional LDOs with a novel architecture, an enhanced process and a new package. Its patented
design requires only a 0.47 µF output capacitor for stability.
This device is insensitive to capacitor Equivalent Series Resistance (ESR) and is stable with any good quality capacitor, including ceramic types (MLCC) for space restricted applications.
The ADP3303 achieves exceptional accuracy of ± 0.8% at room
temperature and ± 1.4% overall accuracy over temperature, line
and load regulations. The dropout voltage of the ADP3303 is
only 180 mV (typical) at 200 mA.
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 external heatsink
or large copper surface on the PC board. This keeps PC board
real estate to a minimum and makes the ADP3303 very attractive for use in portable equipment.
SD
Figure 1. Typical Application Circuit
It 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 features include shutdown and
optional noise reduction capabilities. The ADP330x anyCAP
LDO family offers a wide range of output voltages and output
current levels:
ADP3300 (50 mA, SOT-23)
ADP3301 (100 mA)
ADP3302 (100 mA, Dual Output)
ADP3307 (100 mA, SOT-23-6)
ADP3308 (50 mA, SOT-23-5)
ADP3309 (100 mA, SOT-23-5)
The ADP3303 operates with a wide input voltage range from
3.2 V to 12 V and delivers a load current in excess of 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.
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., 1998
