MP1498 Datasheet, PDF (1/18 Pages) Monolithic Power Systems – High-Efficiency, 2A, 16V, 1.4MHz Synchronous, Step-Down Converter

The Future of Analog IC Technology
DESCRIPTION
The MP1498 is a high-frequency, synchronous,
rectified, step-down, switch-mode converter
with built-in internal power MOSFETs. It offers a
very compact solution to achieve 2A continuous
output current with excellent load and line
regulation over a wide input supply range. The
MP1498 has synchronous mode operation for
higher efficiency over the output current load
range.
Current-mode operation provides a fast
transient response and eases loop stabilization.
Protective features include over-current
protection, thermal shutdown, and external SS
control.
The MP1498 requires a minimal number of
readily-available external components and is
available in a space-saving 8-pin TSOT23
package.
MP1498
High-Efficiency, 2A, 16V, 1.4MHz
Synchronous, Step-Down Converter
FEATURES
 Wide 4.5V-to-16V Operating Input Range
 100mΩ/40mΩ Low R_DS(ON) Internal Power
MOSFETs
 Proprietary Switching-Loss–Reduction
Technique
 High-Efficiency Synchronous Mode
Operation
 Fixed 1.4MHz Switching Frequency
 Can Synchronize to a 300kHz-to-3MHz
External Clock
 Externally-Programmable Soft-Start
 OCP and Hiccup
 Thermal Shutdown
 Output Adjustable from 0.8V
 Available in an 8-pin TSOT-23 Package
APPLICATIONS
 Notebook Systems and I/O Power
 Digital Set-Top Boxes
 Flat-Panel Televisions and Monitors
 Distributed Power Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
C1
22 F
2 _IN
BST ⁵
R3
MP1498
20
6 _EN/SYNC
SW ³
EN/
SYNC
7 _VCC
C3
0.1 F
C5
22nF
1 _SS
GND
4
FB ⁸
C4
0.1 F
L1
2.2 H _C2
22 F
3.3V/2A
R1
40.2k
R5
24k
R2
13k
100
95
90
85
80
75
70
65
60
55
50
0.0 0.4 0.8 1.2 1.6 2.0
MP1498 Rev. 1.01
www.MonolithicPower.com
1
12/18/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
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