MP28372 Datasheet: Step-Down Converter





MP28372 Datasheet PDF Download

Part Number MP28372
Description Step-Down Converter
Manufacture MPS
Total Page 12 Pages
PDF Download Download MP28372 Datasheet PDF

Features: The Future of Analog IC Technology MP28 372 Dual 1.5A, 23V, 1.4MHz Step-Down Co nverter DESCRIPTION The MP28372 is a d ual monolithic step-down switch mode co nverter with built-in internal power MO SFETs. It achieves 1.5A continuous outp ut current for each output over a wide input supply range with excellent load and line regulation. Current mode oper ation provides fast transient response and eases loop stabilization. Fault con dition protection includes cycle-by-cyc le current limiting and thermal shutdow n. In shutdown mode, the regulator draw s 40μA of supply current. The MP28372 requires a minimum number of readily av ailable standard external components. EVALUATION BOARD REFERENCE Board Numbe r EV28372DF-01A Dimensions 2.2”X x 1 .6”Y x 0.4”Z FEATURES • 1.5A Cur rent for Each Output • 0.18Ω Intern al Power MOSFET Switches • Stable wit h Low ESR Output Ceramic Capacitors • Up to 90% Efficiency • 40μA Shutdow n Mode • Fixed 1.4MHz Frequency • Thermal Shutdown • Cycle-by-Cycle Over Current Pr.

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The Future of Analog IC Technology
MP28372
Dual 1.5A, 23V, 1.4MHz
Step-Down Converter
DESCRIPTION
The MP28372 is a dual monolithic step-down
switch mode converter with built-in internal
power MOSFETs. It achieves 1.5A continuous
output current for each output 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. In
shutdown mode, the regulator draws 40μA of
supply current.
The MP28372 requires a minimum number of
readily available standard external components.
EVALUATION BOARD REFERENCE
Board Number
EV28372DF-01A
Dimensions
2.2”X x 1.6”Y x 0.4”Z
FEATURES
1.5A Current for Each Output
0.18Internal Power MOSFET Switches
Stable with Low ESR Output Ceramic
Capacitors
Up to 90% Efficiency
40μA Shutdown Mode
Fixed 1.4MHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 23V Operating Input Range
Each Output Adjustable from 0.92V to 16V
Configurable for Single Output with Double
the Current
Programmable Under Voltage Lockout
Programmable Soft-Start
Available in TSSOP20 with Exposed Pad
and SOIC Packages
APPLICATIONS
Distributed Power Systems
I/O and Core supplies
DSL Modems
Set top boxes
Cable Modems
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
12V
3.3V @ 1.5A
OFF ON
10nF
2A
Schottky
1 20
SSA
ENA
2 19
NC1
COMPA
3 18
BSA
FBA
4 17
INA SGB
5 16
SWA
6
MP28372 PGB 15
PGA
SWB
7 14
SGA
8
INB 13 10nF
FBB
NC2
9 12
COMPB
BSB
10 11
ENB
SSB
82pF
2A
Schottky
3.3nF
OFF ON
2.2nF
2.5V @ 1.5A
Efficiency vs
Load Current
100
90 VOUT=3.3V
VOUT=5V
80 VOUT=2.5V
70
60
50
0
0.5 1.0
LOAD CURRENT (A)
1.5
MP28372 Rev. 1.4
12/10/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
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