Datasheet > AP1635

AP1635

更新时间： 2024-11-21 04:06:19

品牌	Logo	应用领域
美台 - DIODES		转换器
页数	文件大小	规格书
7页	235K
描述
PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER

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AP1635 数据手册

AP1635

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

General Description

Features

The AP1635 series are multi-functional step-down DC/DC

converters with built-in speed, low ON resistance drivers. It is

capable to deliver more than 1.2A output current with external

coil, diode and capacitor.

•

Input voltage range: 2.2V~5V (V_OUTtype)

Oscillator frequency: 700KHz (Typ.)

Internal reference: 1.0V (Typ.)

High efficiency: 93% (Typ.)

Current limit and thermal shutdown protection

Pb-Free Package: SOP-8L

Output voltage is set-up by the external resistors. (±2.5%

accuracy). The 700KHz AP1635 that can work out with small

value external components comes out more compact board.

The device switches to and works under PFM mode with light

loads. It keeps at high efficiency for both light loads and large

output current.

AP1635 can be soft-start with a proper capacitor connected

between CE/SS pin and ground. The stand-by current is less

than 6uA when CE/SS pin is at “LOW” status. The device is

forced to switch off as the voltage at that pin is lower than the

stipulated voltage.

Pin Assignments

Pin Descriptions

( Top View )

Name

No.

Description

Feedback pin

Chip Enable/ Soft Start:

H: Enable

GND

CE/SS

AP1635

L: Disable

SVcc

PVcc

IC signal power supply pin, add a

20Ω resistor to PVcc and a 0.1µF

capacitor to GND.

SVcc

PVcc

IC power supply pin

Switch Pin. Connect external

5/6 inductor/diode here. Minimize trace

area at this pin to reduce EMI.

7/8 GND Pin

GND

Applications

•

Electronic Information Organizers

Palmtops

Cellular and portable phones

Portable Audio Systems

Various Multi-function Power Supplies

AP1635 Rev. 3

1 of 7

www.diodes.com

OCTOBER 2006

12 3 4 5 6 7

中文翻译

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