MP1474
High-Efficiency, 2A, 16V, 500kHz
Synchronous, Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
The MP1474 is a high-frequency, synchronous,
rectified, step-down, switch-mode converter
with built-in power MOSFETs. It offers a very
compact solution to achieve a 2A continuous
output current with excellent load and line
regulation over a wide input supply range. The
MP1474 has synchronous mode operation for
higher efficiency over the output current load
range.
Current-mode operation provides fast transient
response and eases loop stabilization.
Full protection features include over-current
protection and thermal shut down.
The MP1474 requires a minimal number of
readily-available standard external components,
and is available in a space-saving 8-pin
TSOT23 package.
FEATURES
Wide 4.5V-to-16V Operating Input Range
100mΩ/40mΩ Low R
DS(ON)
Internal Power
MOSFETs
High-Efficiency Synchronous Mode
Operation
Fixed 500kHz Switching Frequency
Synchronizes from a 200kHz-to-2MHz
External Clock
Power-Save Mode at Light Load
Internal Soft-Start
Power Good Indicator
OCP Protection and Hiccup
Thermal Shutdown
Output Adjustable from 0.8V
Available in an 8-pin TSOT-23 Package
Notebook Systems and I/O Power
Digital Set-Top Boxes
Flat-Panel Television and Monitors
Distributed Power Systems
APPLICATIONS
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
4.5V-16V
VIN
C1
22
2
IN
BST
5
R3
20
C4
Efficiency vs.
Output Current
100
95
3.3V/2A
L1
C2
47
R1
40.2k
V
OUT
=3.3V, I
OUT
=0.01A-2A
MP1474
6
EN/SYNC
VCC
FB
1
PG
GND
4
SW
3
90
85
80
75
70
65
60
55
50
0.0
V
IN
=12V
V
IN
=16V
V
IN
=5V
EN/
SYNC
C5
0.1
R5
100k
7
8
R6
16k
R2
13k
0.4
0.8
1.2
1.6
OUTPUT CURRENT (A)
2.0
MP1474 Rev. 1.0
9/26/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
1
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