AX5201 데이터 시트보기 (PDF) - Unspecified

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AX5201

Step-up PWM DC/DC Converter

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AX5201

Step-up PWM DC/DC Converter

 GENERAL DESCRIPTION

The AX5201 is high efficient step-up DC/DC converter. Large output current is

possible having a built in internal N channel MOSFET, and using an external coil and

diode.

The AX5201 can be operated at switching frequencies of 500 kHz allowing for easy

filtering and low noise, the size of the external components can be reduced.

Output voltage is programmable with 1.0V of standard voltage supply internal, and

using externally connected components, output voltage (FB) can be set up at will. The

soft-start time can be programmed by outside capacitor; the function prevents overshoot at

startup. Build inside Current limit, Thermal Shutdown and enable functions.

 FEATURES

- Input voltage：3V to 20V

- Output voltage：3.3V to 32V

- Duty ratio：0% to 85% PWM control

- Oscillation frequency：500KHz.

- Enable and Thermal Shutdown function.

- Internal Current limit.

- Built-in N-channel MOSFET

- SOP-8L with Exposed pad Pb-Free package.

 BLOCK DIAGRAM

Vcc

Phase

FB

Compensation

Regulator

SW

+

-

Vref=1.0V

PWM

Controller

+

-

Oscillator

Buffer

Driver

EN

VEN

8uA

Thermal

Shutdown

0.06V

SS

SGND

PGND

1/10

Axelite Confidential Materials, do not copy or distribute without written consent.

Rev.1.4 Jan.25, 2011

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