Datasheet > A7221A

A7221A

更新时间： 2024-11-27 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
13页	423K
描述
DC-DC CONVERTER BUCK (STEP-DOWN) SYNCHRONOUS

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A7221A 数据手册

A7221A

DC-DC CONVERTER BUCK (STEP-DOWN)

2A, 16V SYNCHRONOUS

AiT Semiconductor Inc.

www.ait-ic.com

DESCRIPTION

FEATURES

A7221A is simple, easy to use, 2A synchronous

step-down (Buck) convertor in SOT-26 package, with

high efficiency and fast transient response. A7221A

operates over a wide input voltage range from 4.5V to

16V and integrates main switch and synchronous

switch with very low R_DS(ON)to minimize the

conduction loss. A7221A adopts the active constant

on time PWM architecture to achieve fast transient

responses for high step down applications and high

efficiency at light loads. In addition, it keeps in

constant frequency of 500kHz under heavy load

conditions to minimize the size of inductor and

capacitor. Fault conditions also include cycle-by-cycle

current limit, output under voltage protection, output

over current protection, output short-circuit protection

and thermal shutdown



Integrated 130mΩ and 120mΩ FETs

4.5~16V input voltage range

2A load current capability

Active constant on time PWM architecture with

500kHz switching frequency



Internal soft-start limits the inrush current

2% 0.6V reference

Available in SOT-26 Package

APPLICATION



Set Top Box

Portable TV

Access Point Router

DSL Modem

LCD TV

TYPICAL APPLICATION

The A7221A is available in SOT-26 package.

ORDERING INFORMATION

Package Type

SOT-26

Part Number

A7221AE6R

A7221AE6VR

V: Halogen free Package

R: Tape & Reel

Note

SPQ:3,000pcs/Reel

AiT provides all RoHS products

Figure 1. Typical Application Circuit

Suffix “ V “ means Halogen free Package

REV3.0

- DEC 2015 RELEASED, AUG 2016 UPDATED -

- 1 -

12 3 4 5 6 7...13

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