ADP3301 Analog Devices Data Sheet Manual

High Accuracy any CAP™*

100 m A Low Dropout Linear Regulator

ADP3301

FEATURES FUNCTIONAL BLOCK DIAGRAM High Accuracy (Over Line and Load Regulations at +258C): 60.8%

ADP3301

Ultralow Dropout Voltage: 100 m V Typical @ 100 m A Q1

OUTIN

Requires Only CO = 0.47 m F for Stability

THERMAL R1

any CAP™* = Stable with All Types of Capacitors PROTECTION

Current and Thermal Limiting

Q2 DRIVER Gm

Low Noise

SD R2

Dropout Detector

BANDGAP

Low Shutdown Current: m A

Several Fixed Voltage Options

3.0 V to 12 V Supply Range –208C to +858C Ambient Temperature Range Thermally Enhanced SO-8 Package Excellent Line and Load Regulations

APPLICATIONS Cellular Telephones

Notebook, Palmtop Computers The ADP3301 operates with a wide input voltage range from Battery Powered Systems 3 V to 12 V and delivers a load current in excess of 100 m A. It Portable Instruments features an error flag that signals when the device is about to Post Regulator for Switching Supplies lose regulation or when the short circuit or thermal overload Bar Code Scanners protection is activated. Other features include shutdown and optional noise reduction capabilities. The ADP330x any CAP™* LDO family offers a wide range of output voltages and output

GENERAL DESCRIPTION www.BDTIC.com/ADI

current levels from 50 m A to 300 m A:

The ADP3301 is a member of the ADP330x family of precision low dropout any CAP™* voltage regulators. The ADP3301 ADP3300 (50 m A, SOT-23) stands out from the conventional LDOs with a novel architec- ADP3302 (100 m A, Dual Output) ture, an enhanced process and a new package. Its patented ADP3304 (100 m A, Dual Output with Separate Grounds) design includes a noninverting wideband driver and a stage that ADP3303 (200 m A) permits the use of an internal “pole splitting” capacitor to ADP3306 (300 m A) stabilize the feedback loop with a single output capacitor as small as 0.47 µF. This device is stable with any type of capacitor

regardless of its ESR (Equivalent Serial Resistance) value, 3NR

including ceramic types (MLCC) for space restricted applica- ADP3301-5.0

tions. The ADP3301 achieves exceptional accuracy of ±0.8% at VIN OUTIN VOUT = +5V

room temperature and ±1.4% overall accuracy over tempera- C1 C2

ture, line and load regulations. The dropout voltage of the

ERR EOUT

ADP3301 is only 100 m V (typical) at 100 m A. In addition to the new architecture and process, ADI’s new ON

proprietary thermally enhanced package (Thermal Coastline) OFF

can handle 1 W of power dissipation without external heat sink

or large copper surface on the PC board. This keeps PC board real estate to a minimum and makes the ADP3301 very

attractive for use in portable equipment. Figure 1. Typical Application Circuit

*any CAP is a trademark of Analog Devices Inc.

REV. Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its

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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 Tel: 617/329-4700 World Wide Web Site: http://www.analog.com otherwise under any patent or patent rights of Analog Devices. Fax: 617/326-8703 © Analog Devices, Inc., 1997