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MIC24056 PDF预览

MIC24056

更新时间: 2024-11-09 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

MIC24056 数据手册

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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 (VIN = 19V and VOUT = 0.8V)  
Small output capacitance  
Input voltage range: 4.5V to 19V  
Output current up to 12A  
The Micrel MIC24056 is  
a
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 Controlarchitecture 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  
95  
5.0V  
90  
85  
80  
75  
70  
65  
60  
55  
50  
3.3V  
2.5V  
1.8V  
1.5V  
1.2V  
1.0V  
0.9V  
0.8V  
VIN = 12V  
12 15  
0
3
6
9
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  

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