Advanced Monolithic Systems, Inc. www.advanced-monolithic.com

Phone (925) 443-0722 Fax (925) 443-0723

Advanced

AMS2115

Monolithic

FAST TRANSIENT RESPONSE LOW DROPOUT REGULATOR

Systems

FEATURES

APPLICATIONS

•••• Fast Transient Response

•••• Microprocessor Supplies

•••• Dropout Voltage Defined by FET Used

•••• Video Card Supplies

•••• Very Tight Load Regulation

•••• Low Voltage Logic Supplies

•••• High Side Sense Current Limit

•••• GTL Termination

GENERAL DESCRIPTION

The

The AMS2115 is a single IC controller that drives an external N channel MOSFET as a source follower to produce a fast

transient response, low dropout voltage regulator. The fast transient load performance is obtained by eliminating expensive

tantalum or bulk electrolytic output capacitors in the most demanding modern microprocessor applications. Precision-trimmed

adjustable and fixed output voltage versions accommodate any required microprocessor power supply voltage. By selecting the

N-channel MOSFET RDS(ON) a very low dropout voltage can be achieved. A protection feature includes a high side current

limit amplifier that activates a circuit to limit the FET gate drive. A shutdown pin turns off the gate drive and some internal

circuits to reduce quiescent current. AMS2115 is offered in 8L SOIC and 8L PDIP package.

ORDERING INFORMATION:

8L SOIC

8L PDIP

1

2

8

4

3

7

5

6

GATE

COMP

INEG

S/D

VIN

GND

IPOS

FB

Top View

TYPICAL APPLICATION:

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PACKAGE TYPE

OPERATING JUNCTION

8L PDIP

8L SOIC

TEMPERATURE RANGE

AMS2115P

AMS2115S

-0 to 125

° C

AMS2115P-1.5

AMS2115S-1.5

-0 to 125

° C

AMS2115P-1.8

AMS2115S-1.8

-0 to 125

° C

AMS2115P-2.5

AMS2115S-2.5

-0 to 125

° C

AMS2115P-3.3

AMS2115S-3.3

-0 to 125

° C

AMS2115P-5.0

AMS2115S-5.0

-0 to 125

° C