AMS1070 datasheet(1/7 Pages) AMS

Part #	AMS1070

Description	3A Continuous Output Current

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Manufacturer	AMS [Advanced Monolithic Systems Ltd]

Direct Link	http://www.ams-semitech.com

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DESCRIPTION

The

AMS1070 is a monolithic synchronous buck

regulator.

The

device

integrates

100mΩ

MOSFETS that provide 3A of continuous load

current over a wide operating input voltage of

4.75V to 23V. Current mode control provides

fast transient response and cycle-by-cycle

current limit.

An adjustable soft-start prevents inrush current

at turn-on and in shutdown mode, the supply

current drops below 1µA.

This device, available in an 8-pin

ESOP8

package, provides a very compact system

solution with minimal reliance on external

components.

FEATURES

• 3A Continuous Output Current

4A Peak Output Current

• Wide 4.75V to 23V Operating Input Range

• Integrated 100mΩ Power MOSFET Switches

• Output Adjustable from 0.925V to 20V

• Up to 95% Efficiency

• Programmable Soft-Start

• Stable with Low ESR Ceramic Output Capacitors

• Fixed 380KHz Frequency

• Cycle-by-Cycle Over Current Protection

• Input Under Voltage Lockout

• Thermally Enhanced 8-Pin ESOP8 Package

APPLICATIONS

• Distributed Power Systems

• Networking Systems

• Notebook Computers

TYPICAL APPLICATION

INPUT

4.75V to 23V

OUTPUT

3.3V

3A

C3

3.9nF

C5

10nF

AMS1070

BS

IN

FB

SW

SS

GND

COMP

EN

1

2

3

5

6

4

8

7

L1

10uH (4A)

C

1

10

uF/25V

CERAMIC X 2

R4

10

0K

R1

26.1K

C

2

22uF/6.3V

CERAMIC X 2

R2

10K

R3

6.8K

C4

0.1uF

AMS1070

Advanced Monolithic Systems http://www.ams-semitech.com

1

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