MP28315 Datasheet: Step-Down Converter





MP28315 Step-Down Converter Datasheet

Part Number MP28315
Description Step-Down Converter
Manufacture MPS
Total Page 11 Pages
PDF Download Download MP28315 Datasheet PDF

Features: TM The Future of Analog IC Technology TM MP28315 3A, 16V, 340KHz Synchronous R ectified Step-Down Converter DESCRIPTI ON The MP28315 is a monolithic synchron ous buck regulator. The device integrat es 100mΩ MOSFETS that provide 3A cont inuous load current over a wide operati ng input voltage of 5V to 16V. Current mode control provides fast transient re sponse and cycle-by-cycle current limit . An adjustable soft-start prevents inr ush current at turn-on. In shutdown mod e, the supply current drops below 1µA. This device, available in an 8-pin SOI C package, provides a very compact syst em solution with minimal reliance on ex ternal components. FEATURES • 3A Out put Current • Wide 5V to 16V Operatin g Input Range • Integrated 100mΩ Po wer MOSFET Switches • Output Adjustab le from 0.925V to 13V • Up to 95% Eff iciency • Programmable Soft-Start • Stable with Low ESR Ceramic Output Cap acitors • Fixed 340KHz Frequency • Cycle-by-Cycle Over Current Protection • Input Under-Voltage Lockout • Thermally Enhan.

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TM
The Future of Analog IC Technology TM
MP28315
3A, 16V, 340KHz Synchronous Rectified
Step-Down Converter
DESCRIPTION
The MP28315 is a monolithic synchronous buck
regulator. The device integrates 100m
MOSFETS that provide 3A continuous load
current over a wide operating input voltage of
5V to 16V. Current mode control provides fast
transient response and cycle-by-cycle current
limit.
An adjustable soft-start prevents inrush current
at turn-on. In shutdown mode, the supply
current drops below 1µA.
This device, available in an 8-pin SOIC
package, provides a very compact system
solution with minimal reliance on external
components.
FEATURES
3A Output Current
Wide 5V to 16V Operating Input Range
Integrated 100mPower MOSFET Switches
Output Adjustable from 0.925V to 13V
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low ESR Ceramic Output Capacitors
Fixed 340KHz Frequency
Cycle-by-Cycle Over Current Protection
Input Under-Voltage Lockout
Thermally Enhanced 8-Pin SOIC Package
APPLICATIONS
Distributed Power Systems
Networking Systems
FPGA, DSP, ASIC Power Supplies
Green Electronics/Appliances
Notebook Computers
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
INPUT
5V to 16V
C5
10nF
21
7
IN
EN
BS
SW
3
8 SS
MP28315
FB 5
GND
COMP
46
C6
(optional)
C3
3.9nF
D1
B130
(optional)
OUTPUT
3.3V
3A
MP28315_TAC_S01
Efficiency vs
Load Current
100
95
90 VIN = 12V
VIN = 5V
85
80
75
70
65
60
55
50
0.1
1.0
LOAD CURRENT (A)
10
MP28315_EC01
MP28315 Rev. 1.2
12/12/2007
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
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