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MA5006

Major Power Technology Co., Ltd.

Rev.1.0

8

th, Apr., 2019

1A, 1.2MHz Low Noise Sync.

Buck Converter



GENERAL DESCRIPTION

The MA5006 is a monolithic synchronous buck converter with built-in internal power

MOSFETs. It achieves 1A continuous output current, fixed switching frequency with excellent

load regulation and line regulation.

Current mode operation provides extremely fast transient response and eases of loop

stabilization. Fault condition protection includes cycle-by-cycle current limiting, output short

circuit protection and thermal shutdown. In shutdown mode the regulator draws less than 1μA

of supply current. Internal soft-start minimizes the inrush supply current at initial startup.

The MA5006 requires a minimum number of readily available standard external

components. It is available in SOT23-5L and TSOT23-5L package.



FEATURES

-

2.7V to 5.5V Input Voltage Range.

-

Up to 1A Output Current.

-

300/200mΩ Internal Power MOSFET Switches.

-

Up to 95% Efficiency.

-

40μA Typical Quiescent Current.

-

Less than 1μA Shutdown Current.

-

1.2MHz Switching Frequency.

-

Internal Compensation and Stable with Low ESR Ceramic Capacitors.

-

Internal Build-in Soft-Start Function.

-

Thermal Shutdown Protection.

-

Current Limit Protection.

-

Short-Circuit Protection.

-

Output Adjustable from 0.6V to VIN.

-

Available in SOT23-5L and TSOT23-5L Pb-Free Package.



APPLICATION CIRCUIT

VIN

2.7V to 5.5V

C1

10uF

VIN

L1

2.2uH

MA5006

GND

SW

C8

10uF

FB

R1

450k

Ω

R2

100k

Ω

C6

3.3nF

VOUT

3.3V

EN

ON

OFF

OUT

FB

FB

R1

V

= V

x 1+

, V =0.6V, 60K

R2

300K

R2

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