MP28369 Datasheet, PDF (1/8 Pages) Monolithic Power Systems – 2A, 16V, 1.4MHz Step-Down Converter

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
• 0.18Ω Internal 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
4
2
IN
9 _EN
BS
SW ⁵
MP28369
10 _SS
7
FB
GND
COMP
C4
10nF
6
C6
OPEN
8
C3
1.8nF
D1
B220A
V_OUT
2.5V/2A
MP28369_TAC_S01
Efficiency vs
Load Current
100
90
V_OUT=5V
80
70 V_OUT=3.3V
60
V_OUT=2.5V
50
0
0.5 1.0 1.5 2.0
LOAD CURRENT (A)
MP28369_EC01
MP28369 Rev. 1.0
www.MonolithicPower.com
1
12/13/2007
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