MP2259 Datasheet, PDF (1/9 Pages) Monolithic Power Systems – 1A, 16V, 1.4MHz Step-Down Converter

The Future of Analog IC Technology
DESCRIPTION
The MP2259 is a monolithic integrated step-
down switch mode converter with an internal
power MOSFET. It achieves 1A 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.
The MP2259 requires a minimum number of
readily available standard external components.
The MP2259 is available in TSOT23-6 and
SOT23-6 packages.
MP2259
1A, 16V, 1.4MHz
Step-Down Converter
FEATURES
• 1A Output Current
• 0.5Ω Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 92% Efficiency
• 0.1μA Shutdown Mode
• Fixed 1.4MHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.5V to 16V Operating Input Range
• Output Adjustable from 0.81V to 14V
• Available in TSOT23-6 and SOT23-6 Packages
APPLICATIONS
• Hand Disk Drive
• xDSL Modems Cable
• Set-Top Box
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
V_IN
12V
OFF ON
5
IN
1
BST
CB
10nF
6
SW
MP2259
D1
B230A
4
EN
GND
2
3
FB
V_OUT
3.3V @ 1A
Efficiency vs
Load Current
100
95
VOUT = 5V
90
85
80
VOUT = 3.3V
75
70
65
60
VIN = 12V
55
50
10
100
1000
LOAD CURRENT (mA)
MP2259-EC01
MP2259 Rev. 0.92
www.MonolithicPower.com
1
9/15/2011
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.