Datasheet > DS8048-01

DS8048-01

更新时间： 2024-11-05 12:52:39

品牌	Logo	应用领域
立锜 - RICHTEK		转换器
页数	文件大小	规格书
11页	168K
描述
3MHz 1A Step-Down Converter

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DS8048-01 数据手册

RT8048

3MHz 1A Step-Down Converter

General Description

Features

^z2.5V to 5.5V Input Range

The RT8048 is a high-efficiency Pulse-Width-Modulated

(PWM) step-downDC/DC converter. Capable of delivering

1A output current over a wide input voltage range from

2.5V to 5.5V, the RT8048 is ideally suited for portable

electronic devices that are powered from 1-cell Li-ion

battery or from other power sources such as cellular

phones, PDAs and hand-held devices. Two operating

modes are available including : PWM/Low Dropout auto

switch and shut-down mode. The internal synchronous

rectifier with low R_DS(ON)dramatically reduces conduction

loss at PWM mode. No external Schottky diode is

required in practical application. The RT8048 enters Low-

Dropout mode when normal PWM cannot provide regulated

output voltage by continuously turning on the upper

P-MOSFET. The RT8048 enters shut-down mode and

consumes less than 0.1μAwhen ENpin is pulled low. The

switching ripple is easily smoothed-out by small package

filtering elements due to a fixed operating frequency of

3MHz.

^z3MHz Fix-Frequency PWM Operation

^z1A Output Current

^z90% Efficiency

^zNo Schottky Diode Required

^z0.6V Reference Allows Low Output Voltage

^zLow Dropout Operation : 100% Duty Cycle

^zRoHS Compliant and Halogen Free

Applications

z Portable Instruments

z Microprocessors andDSP Core supplies

z Cellular Phones

z Wireless and DSL Modems

z PC Cards

Pin Configurations

(TOP VIEW)

FB/VOUT

GND

Ordering Information

VIN

RT8048(-

)

Package Type

WDFN-6L 2x2

QW : WDFN-6L 2x2 (W-Type)

Lead Plating System

Z : ECO (Ecological Element with

Halogen Free and Pb free)

Marking Information

HB : Product Code

W : Date Code

HBW

Output Voltage

Default : Adjustable

10 : 1.0V

12 : 1.2V

15 : 1.5V

18 : 1.8V

25 : 2.5V

33 : 3.3V

Note :

Richtek products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

` Suitable for use in SnPb or Pb-free soldering processes.

DS8048-01 June 2011

www.richtek.com

12 3 4 5 6 7...11

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