MP28369 Datasheet: Step-Down Converter





MP28369 Step-Down Converter Datasheet

Part Number MP28369
Description Step-Down Converter
Manufacture MPS
Total Page 8 Pages
PDF Download Download MP28369 Datasheet PDF

Features: TM The Future of Analog IC Technology TM DESCRIPTION The MP28369 is a monolithi c step-down switch mode converter with a built-in internal power MOSFET. It ac hieves 2A continuous output current ove r a wide input supply range with excell ent load and line regulation. Current m ode operation provides fast transient r esponse and eases loop stabilization. F ault condition protections include cycl e-by-cycle current limiting and thermal shutdown. In shutdown mode the regulat or draws 25µA of supply current. Progr ammable soft-start minimizes the inrush supply current and the output overshoo t at initial startup. The MP28369 requi res a minimum number of readily availab le standard external components. MP283 69 2A, 16V, 1.4MHz Step-Down Converter FEATURES • 2A Output Current • 0.18 Ω Internal Power MOSFET Switch • St able with Low ESR Output Ceramic Capaci tors • 90% Efficiency • 25µA Shutd own Mode • Fixed 1.4MHz Frequency • Thermal Shutdown • Cycle-by-Cycle Over Current Protection • Wide 4.75V to 16V Op.

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TM
The Future of Analog IC Technology TM
DESCRIPTION
The MP28369 is a monolithic step-down switch
mode converter with a built-in internal power
MOSFET. It achieves 2A 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 protections include cycle-by-cycle
current limiting and thermal shutdown. In
shutdown mode the regulator draws 25µA of
supply current. Programmable soft-start
minimizes the inrush supply current and the
output overshoot at initial startup.
The MP28369 requires a minimum number of
readily available standard external components.
MP28369
2A, 16V, 1.4MHz
Step-Down Converter
FEATURES
2A Output Current
0.18Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
90% Efficiency
25µA Shutdown Mode
Fixed 1.4MHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 16V Operating Input Range
Output Adjustable from 0.92V to 16V
Programmable Under Voltage Lockout
Available in a Tiny MSOP Package
Evaluation Board Available
APPLICATIONS
Distributed Power Systems
Battery Charger
DSL Modems
Pre-Regulator for Linear Regulators
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 16V
C5
10nF
42
IN
9 EN
BS
SW 5
MP28369
10 SS
7
FB
C4
10nF
GND
6
C6
OPEN
COMP
8
C3
1.8nF
D1
B220A
VOUT
2.5V/2A
MP28369_TAC_S01
Efficiency vs
Load Current
100
90 VOUT=5V
80
70 VOUT=3.3V
60
VOUT=2.5V
50
0
0.5 1.0 1.5
LOAD CURRENT (A)
2.0
MP28369_EC01
MP28369 Rev. 1.0
12/23/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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