MP29373 Datasheet: Step-Down Converter





MP29373 Step-Down Converter Datasheet

Part Number MP29373
Description Step-Down Converter
Manufacture MPS
Total Page 10 Pages
PDF Download Download MP29373 Datasheet PDF

Features: The Future of Analog IC Technology MP29 373 Dual 1.5A, 23V, 1.4MHz Step-Down Co nverter DESCRIPTION The MP29373 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 opera tion provides fast transient response a nd eases loop stabilization. Fault cond ition protection includes cycle-by-cycl e current limiting and thermal shutdown . In shutdown mode, the regulator draws 40μA of supply current. The MP29373 r equires a minimum number of readily ava ilable standard external components. F EATURES • 1.5A Current for Each Outpu t • 0.18Ω Internal Power MOSFET Swi tches • Stable with Low ESR Output Ce ramic Capacitors • Up to 90% Efficien cy • 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 1.

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The Future of Analog IC Technology
MP29373
Dual 1.5A, 23V, 1.4MHz
Step-Down Converter
DESCRIPTION
The MP29373 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 MP29373 requires a minimum number of
readily available standard external components.
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 a TSSOP20 Package with
Exposed Pad
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 Registered 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
MP29373 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
VOUT=3.3V
90
VOUT=5V
80 VOUT=2.5V
70
60
50
0
0.5 1.0
LOAD CURRENT (A)
1.5
MP29373 Rev. 1.1
12/13/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
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