Datasheet > A7108

A7108

更新时间： 2024-10-31 01:15:03

品牌	Logo	应用领域
创瑞 - AITSEMI		DC-DC转换器
页数	文件大小	规格书
12页	365K
描述
DC-DC CONVERTER/ BUCK SYNCHRONOUS

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A7108 数据手册

A7108

AiT Semiconductor Inc.

DC-DC CONVERTER/ BUCK (STEP-DOWN)

1.5MHz, 800mA SYNCHRONOUS

www.ait-ic.com

DESCRIPTION

FEATURES

The A7108 is

high efficiency monolithic



High Efficiency: Up to 96%

synchronous buck regulator using a constant

frequency, current mode architecture. The device is

available in an adjustable version. Supply current

with no load is 300uA and drops to <1uA in

shutdown. The 2.5V to 6.5V input voltage range

makes the A7108 ideally suited for single Li-Ion,

two to four AA battery-powered applications. 100%

duty cycle provides low dropout operation,

extending battery life in portable systems. PWM

pulse skipping mode operation provides very low

output ripple voltage for noise sensitive

applications. Switching frequency is internally set at

1.5MHz, allowing the use of small surface mount

inductors and capacitors. The internal synchronous

switch increases efficiency and eliminates the need

for an external Schottky diode. Low output voltages

are easily supported with the 0.6V feedback

reference voltage.

1.5MHz Constant Switching Frequency

800mA Output Current at V_IN=3V

Integrated Main switch and synchronous

rectifier. No Schottky Diode Required

2.5V to 6.5V Input Voltage Range

Output Voltage as Low as 0.6V

100% Duty Cycle in Dropout



Quiescent Current: 300μA(input < 4.2V)

Slope Compensated Current Mode Control for

Excellent Line and Load Transient Response

Short Circuit Protection



<1uA Shutdown Current

Soft start

Available in SOT-25 Package

APPLICATION



Cellular and Smart Phones

Microprocessors and DSP Core Supplies

Wireless and DSL Modems

PDAs

The A7108 is available in SOT-25 package.

MP3 / MP4 /PMP Player

Digital Still and Video Cameras

Portable Instruments

ORDERING INFORMATION

TYPICAL APPLICATION

Package Type

SOT-25

Part Number

A7108E5R-ADJ

A7108E5VR-ADJ

ADJ: Adjustable Output Voltage

V: Halogen free Package

R: Tape & Reel

Note

AiT provides all RoHS products

Suffix “ V “ means Halogen free Package

Figure 1. Basic Application Circuit with A7108

adjustable version

REV2.1

- NOV 2008 RELEASED, MAY 2016 UPDATED -

- 1 -

12 3 4 5 6 7...12

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