Datasheet > FSP3133SG

FSP3133SG

更新时间： 2024-09-27 07:00:19

品牌	Logo	应用领域
FOSLINK		转换器
页数	文件大小	规格书
7页	219K
描述
PWM CONTROL 2A STEP-DOWN CONVERTER

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中文翻译

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FSP3133SG 数据手册

PWM CONTROL 2A STEP-DOWN CONVERTER

FSP3133

FEATURES

GENERAL DESCRIPTION

Input voltage: 3.6V to 23V.

FSP3133 consists of step-down switching regulator

with PWM control. These devices include a

reference voltage source, oscillation circuit, error

amplifier and internal PMOS.

Output voltage: 0.8V to VCC.

Duty ratio: 0% to 100% PWM control

Oscillation frequency: 300KHz typ.

Soft-start, Current limit, Enable function

Thermal Shutdown function

FSP3133 provides low-ripple power, high efficiency,

and excellent transient characteristics. The PWM

control circuit is able to vary the duty ratio linearly

from 0 up to 100%. This converter also contains an

error amplifier circuit as well as a soft-start circuit

that prevents overshooting at startup. An enable

function, an over current protect function and a

short circuit protect function are built inside, and

when OCP or SCP happens, the operation

frequency will be reduced from 300KHz to 30KHz.

Also, an internal compensation block is built in to

minimum external component count.

With the addition of an internal P-channel Power

MOS, a coil, capacitors, and a diode connected

externally, these ICs can function as step-down

switching regulators. They serve as ideal power

supply units for portable devices when coupled with

Built-in internal SW P-channel MOSFET

SOP8L Package.

TYPICAL APPLICATION

PC Motherboard

LCD Monitor

Graphic Card

DVD-Video Player

Telecom Equipment

ADSL Modem

Printer and other Peripheral Equipment

Microprocessor core supply

Networking power supply

PIN ASSIGNMENT

the

SOP8L mini-package,

providing

such

outstanding features as low current consumption.

Since this converter can accommodate an input

voltage up to 23V, it is also suitable for the operation

via an AC adapter.

(Top View)

VSS

OCSET

VCC

OUTPUT

PIN DESCRIPTION

Pin Number Pin Name

Pin Description

Feedback Pin

Enable Input Pin

H: Normal operation(Step-down operation)

L: Step-down operation stopped(All circuits deactivated)

OCSET Add an external resistor to set max output current

VCC

IC power supply pin

Switch pin. Connect external inductor/diode here. Minimize trace area at this pin to

reduce EMI.

OUTPUT

5,6

7,8

VSS

GND pin

2007-6-22

1/7

12 3 4 5 6 7

中文翻译

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