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MIC45208-1 PDF预览

MIC45208-1

更新时间: 2024-10-02 01:10:43
品牌 Logo 应用领域
麦瑞 - MICREL /
页数 文件大小 规格书
35页 2947K
描述
26V 10A DC-to-DC Power Module

MIC45208-1 数据手册

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MIC45208-1/-2  
26V 10A DC-to-DC Power Module  
General Description  
Features  
Micrel’s MIC45208 is a synchronous step-down regulator  
module, featuring a unique adaptive ON-time control  
No compensation required  
Up to 10A output current  
>93% peak efficiency  
Output voltage: 0.8V to 5.5V with ±1% accuracy  
Adjustable switching frequency from 200kHz to 600kHz  
Enable input and open-drain power good (PG) output  
architecture. The module incorporates  
a
DC-to-DC  
controller, power MOSFETs, bootstrap diode, bootstrap  
capacitor, and an inductor in a single package; simplifying  
the design and layout process for the end user.  
This highly-integrated solution expedites system design  
and improves product time-to-market. The internal  
MOSFETs and inductor are optimized to achieve high  
efficiency at a low output voltage. The fully-optimized  
design can deliver up to 10A current under a wide input  
voltage range of 4.5V to 26V, without requiring additional  
cooling.  
The MIC45208-1 uses Micrel’s HyperLight Load® (HLL)  
while the MIC45208-2 uses Micrel’s Hyper Speed  
Control™ (HSC) architecture, which enables ultra-fast load  
transient response, allowing for a reduction of output  
capacitance. The MIC45208 offers 1% output accuracy  
that can be adjusted from 0.8V to 5.5V with two external  
resistors. Additional features include thermal shutdown  
protection, input undervoltage lockout, adjustable current  
limit, and short circuit protection. The MIC45208 allows for  
safe start-up into a pre-biased output.  
Hyper Speed Control (MIC45208-2) architecture  
enables fast transient response  
HyperLight Load (MIC45208-1) improves light load  
efficiency  
Supports safe startup into pre-biased output  
CISPR22, Class B compliant  
–40°C to +125°C junction temperature range  
Thermal-shutdown protection  
Short-circuit protection with hiccup mode  
Adjustable current limit  
Available in 52-pin 10mm × 10mm × 4mm QFN package  
Applications  
High power density point-of-load conversion  
Servers, routers, networking, and base stations  
FPGAs, DSP, and low-voltage ASIC power supplies  
Industrial and medical equipment  
Datasheet and other support documentation can be found  
on Micrel’s web site at: www.micrel.com.  
Typical Application  
Efficiency (VIN = 12V)  
vs. Output Current (MIC45208-1)  
100  
5.0VOUT  
90  
80  
70  
60  
50  
40  
30  
20  
10  
3.3VOUT  
2.5VOUT  
1.8VOUT  
1.5VOUT  
1.2VOUT  
1.0VOUT  
0.8VOUT  
fSW = 600kHz  
0
2
4
6
8
10  
12  
14  
OUTPUT CURRENT (A)  
Hyper Speed Control is a trademark of Micrel, Inc.  
HyperLight Load is a registered trademark 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  
February 6, 2015  
Revision 2.0  

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