MIC45212-1/-2
26V/14A DC-to-DC Power Module
General Description Features
Micrels MIC45212 is a synchronous step-down regulator
No compensation required
module, featuring a unique adaptive ON-time control
Up to 14A output current
architecture. The module incorporates a DC-to-DC
>93% peak efficiency
controller, power MOSFETs, bootstrap diode, bootstrap
Output voltage: 0.8V to 5.5V with 1% accuracy
capacitor, and an inductor in a single package; simplifying
the design and layout process for the end user. Adjustable switching frequency from 200kHz to 600kHz
Enable input and open-drain power good output
This highly-integrated solution expedites system design
and improves product time-to-market. The internal Hyper Speed Control (MIC45212-2) architecture
enables fast transient response
MOSFETs and inductor are optimized to achieve high
efficiency at a low output voltage. The fully-optimized
HyperLight Load (MIC45212-1) improves light load
design can deliver up to 14A current under a wide input
efficiency
voltage range of 4.5V to 26V, without requiring additional
Supports safe startup into pre-biased output
cooling.
CISPR22, Class B compliant
The MIC45212-1 uses Micrels HyperLight Load (HLL)
40 C to +125 C junction temperature range
while the MIC45212-2 uses Micrels Hyper Speed
Thermal-shutdown protection
Control architecture, which enables ultra-fast load
Short-circuit protection with hiccup mode
transient response, allowing for a reduction of output
capacitance. The MIC45212 offers 1% output accuracy
Adjustable current limit
that can be adjusted from 0.8V to 5.5V with two external
Available in 64-pin 12mm 12mm 4mm QFN package
resistors. Additional features include thermal shutdown
protection, input undervoltage lockout, adjustable current
Applications
limit, and short circuit protection. The MIC45212 allows for
High power density point-of-load conversion
safe start-up into a pre-biased output.
Servers, routers, networking, and base stations
Datasheet and other support documentation can be found
FPGAs, DSP, and low-voltage ASIC power supplies
on Micrels web site at: www.micrel.com.
Industrial and medical equipment
Typical Application
Efficiency
vs. Output Current (MIC45212-1)
100
5.0V
OUT
90
3.3V
OUT
80 2.5V
OUT
1.8V
OUT
70
1.5V
OUT
60
1.2V
OUT
50
1.0V
OUT
40 0.8V
OUT
30
20
f = 600kHz
SW
10
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 +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC45212
(1)
Ordering Information
Switching Junction Lead
Part Number Features Package
Frequency Temperature Range Finish
64-pin
MIC45212-1YMP 200kHz to 600kHz Hyper Light Load 40C to +125C 12mm 12mm 4mm Pb-Free
QFN
64-pin
MIC45212-2YMP 200kHz to 600kHz Hyper Speed Control 40C to +125C 12mm 12mm 4mm Pb-Free
QFN
Note:
1. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5k in series with 100pF.
Pin Configuration
64-Pin 12mm 12mm 4mm QFN
(Top View)
March 5, 2015 2 Revision 1.1