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| MP38876 Datasheet, PDF (1/15 Pages) Monolithic Power Systems – 15A, 28V, High Frequency Step-Down Converter with Synchronous Gate Driver | |||
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The Future of Analog IC Technology
MP38876
15A, 28V, High Frequency Step-Down
Converter with Synchronous Gate Driver
DESCRIPTION
The MP38876 is a monolithic step-down switch
mode converter with a built in internal power
MOSFET. It achieves 15A continuous output
current over a wide input supply range with
excellent load and line regulation.
Current mode operation provides fast transient
response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle
current limiting and thermal shutdown.
The MP38876 requires a minimum number of
readily available standard external components
and is available in a 20-pin 3mm x 4mm QFN
package.
The MP38876 is ideal for a wide range of
applications including distributed power systems,
pre-regulator for linear regulators, compact DC-
DC regulators for PCB space limited platforms.
TYPICAL APPLICATION
VCC
VIN
R3
C6 C3
OFF ON
IN
PG BST
SW
COMP
M2
VCC
BG
SS/TRK MP38876
FB
EN
SYNCIN
SYNCOUT GND
FEATURES
⢠Wide 4.5V to 28V Operating Input Range
⢠15A Output Current
⢠25m⦠Internal Power MOSFET Switch
⢠Synchronous Gate Driver
⢠Synch from 300kHz to > 1MHz External Clock or
400kHz Fixed Switching Frequency
⢠Synch Output to Drive Another Regulator in
Phase-Shift Operation
⢠Feedback Voltage Accuracy: 2%
⢠Programmable Soft-Start
⢠Startup Tracking
⢠EN and Power Good for Power Sequencing
⢠Cycle-by-Cycle Over Current Protection
⢠Thermal Shutdown
⢠Output Adjustable from 0.8V to 12V
⢠Stable with Low ESR Output Ceramic
Capacitors
⢠Available in a 3mm x 4mm QFN Package
APPLICATIONS
⢠Distributed Power Systems
⢠Pre-Regulator for Linear Regulators
⢠Compact DC-DC Regulator for PCB Space
Limited Platforms
âMPSâ and âThe Future of Analog IC Technologyâ are Registered Trademarks of
Monolithic Power Systems, Inc.
System
VOUT
1.2V/15A
Efficiency vs. Output Current
VIN=12V,VOUT=1.2V
95
90
85
80
75
70
65
60
55
50
0 2 4 6 8 10 12 14 16
OUTPUT CURRENT(A)
MP38876 Rev. 0.91
www.MonolithicPower.com
1
11/4/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
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