TM
MP2358
2A, 23V, 370KHz
Step-Down Converter
The Future of Analog IC Technology
TM
DESCRIPTION
The MP2358 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 protection includes cycle-by-cycle
current limiting and thermal shutdown. In
shutdown mode the regulator draws 23µA of
supply
current.
Programmable
soft-start
minimizes the inrush supply current and the
output overshoot at initial startup.
The MP2358 requires a minimum number of
readily available standard external components.
FEATURES
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2A Output Current with QFN Package
0.18Ω Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
93% Efficiency
23µA Shutdown Mode
Fixed 370KHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.75V to 23V Operating Input Range
Output Adjustable from 0.92V to 16V
Programmable Under Voltage Lockout
Available in QFN10 (3mm x 3mm) and SO8
Packages
Distributed Power Systems
Battery Charger
Pre-Regulator for Linear Regulators
APPLICATIONS
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EVALUATION BOARD REFERENCE
Board Number
EV2358DS-00A
EV2358DQ-00A
Dimensions
2.3” x 1.4” x 0.5”
2.0” x 1.3” x 0.4”
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V - 23V
Efficiency vs
Output Current
C5
10nF
95
90
EFFICIENCY (%)
OPEN = AUTOMATIC
STARTUP
IN
EN
BS
SW
5.0V
3.3V
2.5V
MP2358
SS
GND
FB
COMP
D1
B220A
V
OUT
3.3V/2A
85
80
75
70
65
60
0
0.5
1.0
1.5
C4
10nF
C6
OPEN
C3
3.9nF
2.0
2.5
MP2358_TAC_S01
OUTPUT CURRENT (A)
MP2358_EC01
MP2358 Rev. 1.3
3/23/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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