Datasheet > A7121A

A7121A

更新时间： 2024-09-16 01:04:35

品牌	Logo	应用领域
创瑞 - AITSEMI		DC-DC转换器
页数	文件大小	规格书
14页	528K
描述
DC-DC CONVERTER BUCK

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数据手册

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A7121A 数据手册

A7121A

DC-DC CONVERTER BUCK (STEP-DOWN)

1MHz, 2.0A, SYNCHRONOUS

AiT Semiconductor Inc.

www.ait-ic.com

DESCRIPTION

FEATURES

The A7121A is

synchronous buck regulator using

high efficiency monolithic

constant



High Efficiency: Up to 97%

1MHz Constant Switching Frequency

2.0A Output Current at V_IN=3V

Integrated Main Switch and Synchronous Rectifier

No Schottky Diode Required

2.7V to 6.0V Input Voltage Range

frequency, current mode architecture. Supply current

with no load is 60uA and drops to <1uA in shutdown.

The 2.7V to 6.0V input voltage range makes the

A7121A 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 1MHz, 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.



Output Voltage as Low as 0.6V

100% Duty Cycle in Dropout

Quiescent Current: 60μA(input < 4.2V)

Slope Compensated Current Mode Control for

Excellent Line and Load Transient Response

Robust protection features, OCP, SCP, TSD

Same BOM L-C passive components for V_IN=5V

to V_OUT= 3.3V, 2.5V, 1.8V, 1.2V, and 1.0V

Shutdown Current <1uA



Internal Soft start Circuitry

Available in SOT-25 and SOT-26 Packages

APPLICATION

The A7121A is available in SOT-25 and SOT-26

packages.



Set Top Box

Portable Instruments

ORDERING INFORMATION

Battery Powered Equipment

Wireless Access Point Router and DSL Modems

Personal and Notebook Computer

Microprocessors and DSP Core Supplies

Digital Still and Video Cameras

Package Type

Part Number

A7121AE5R

A7121AE5VR

A7121AE6R

A7121AE6VR

SOT-25

SPQ: 3,000pcs/Reel

SOT-26

SPQ: 3,000pcs/Reel

TYPICAL APPLICATION

V: Halogen free Package

R: Tape & Reel

Note

AiT provides all RoHS products

Figure 1. Typical Application Circuit

REV1.3

- JUL 2013 RELEASED, NOV 2016 UPDATED -

- 1 -

12 3 4 5 6 7...14

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