MIC45212 Datasheet, PDF (1/31 Pages) Micrel Semiconductor – 26V/14A DC-to-DC Power Module

MIC45212-1/-2
26V/14A DC-to-DC Power Module
General Description
Micrel’s MIC45212 is a synchronous step-down regulator
module, featuring a unique adaptive ON-time control
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 14A current under a wide input
voltage range of 4.5V to 26V, without requiring additional
cooling.
The MIC45212-1 uses Micrel’s HyperLight Load^® (HLL)
while the MIC45212-2 uses Micrel’s Hyper Speed
Control™ architecture, which enables ultra-fast load
transient response, allowing for a reduction of output
capacitance. The MIC45212 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 MIC45212 allows for
safe start-up into a pre-biased output.
Datasheet and other support documentation can be found
on Micrel’s web site at: www.micrel.com.
Features
 No compensation required
 Up to 14A 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 output
 Hyper Speed Control™ (MIC45212-2) architecture
enables fast transient response
 HyperLight Load^® (MIC45212-1) 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 64-pin 12mm × 12mm × 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
Typical Application
Efficiency
vs. Output Current (MIC45212-1)
100
5.0V_OUT
90
3.3V_OUT
80
2.5V_OUT
70
1.8V_OUT
1.5V_OUT
60
1.2V_OUT
50
1.0V_OUT
40
0.8V_OUT
30
20
10
f_SW = 600kHz
0 2 4 6 8 10 12 14 16 18 20
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 [phone] • fax + 1 [phone] • http://www.micrel.com
April 28, 2014
Revision-1.0