Datasheet > MIC24056

MIC24056

更新时间： 2024-11-08 12:03:59

品牌	Logo	应用领域
麦瑞 - MICREL		稳压器
页数	文件大小	规格书
30页	1669K
描述
12V, 12A High-Efficiency Buck Regulator

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MIC24056 数据手册

MIC24056

12V, 12A High-Efficiency Buck Regulator

SuperSwitcher II

General Description

Features

•

HyperLight Load efficiency – up to 80% at 10mA

Hyper Speed Control architecture enables

− High delta V operation (V_IN= 19V and V_OUT= 0.8V)

− Small output capacitance

Input voltage range: 4.5V to 19V

Output current up to 12A

The Micrel MIC24056 is

constant-frequency,

synchronous DC/DC buck regulator featuring adaptive on-

time control architecture. The MIC24056 operates over a

supply range of 4.5V to 19V. It has an internal linear

regulator which provides a regulated 5V to power the

internal control circuitry. MIC24056 operates at a constant

600kHz switching frequency in continuous-conduction

mode and can be used to provide up to 12A of output

current. The output voltage is adjustable down to 0.8V.

Micrel’s HyperLight Load^®architecture provides the same

high efficiency and ultra-fast transient response as the

Hyper Speed Control architecture under medium to

heavy loads, but also maintains high efficiency under light

load conditions by transitioning to variable frequency,

discontinuous mode operation.

•

Up to 95% efficiency

Adjustable output voltage from 0.8V to 5.5V

±1% FB accuracy

Any Capacitor™ stable − zero-to-high ESR

600kHz switching frequency

Power good (PG) output

Foldback current-limit and “hiccup” mode short-circuit

protection

The MIC24056 offers a full suite of protection features to

ensure protection of the IC during fault conditions. These

include undervoltage lockout to ensure proper operation

under power-sag conditions, thermal shutdown, internal

soft start to reduce the inrush current, foldback current-

limit and “hiccup” mode short-circuit protection. The

MIC24056 includes a power good (PG) output to allow

simple sequencing.

•

Safe start-up into pre-biased loads

–40°C to +125°C junction temperature range

Available in 28-pin 5mm × 6mm QFN package

Applications

•

Servers, work stations

The 12A Hyper Speed Control part, MIC24055, is also

available on Micrel’s web site.

Routers, switches, and telecom equipment

Base stations

All support documentation can be found on Micrel’s web

site at: www.micrel.com.

___________________________________________________________________________________________________________

Typical Application

Efficiency (VIN = 12V)

vs. Output Current

100

5.0V

3.3V

2.5V

1.8V

1.5V

1.2V

1.0V

0.9V

0.8V

VIN = 12V

12 15

OUTPUT CURRENT (A)

HyperLight Load is a registered trademark of Micrel, Inc.

Hyper Speed Control, SuperSwitcher II, and Any Capacitor are trademarks of Micrel, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-121012-A

December 2012

12 3 4 5 6 7...30

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