MP2144 Datasheet, PDF (1/14 Pages) Monolithic Power Systems – 2A, 5.5V, 1.2MHz, 40A IQ, COT Synchronous Step Down Switcher

The Future of Analog IC Technology
MP2144
2A, 5.5V, 1.2MHz, 40μA I_Q, COT
Synchronous Step Down Switcher
DESCRIPTION
The MP2144 is a monolithic, step-down, switch-
mode converter with internal power MOSFETs.
It can achieve up to 2A continuous output
current from a 2.5V–to-5.5V input voltage with
excellent load and line regulation. The output
voltage can be regulated to as low as 0.6V.
The constant-on-time control scheme provides
fast transient response and eases loop
stabilization. Fault condition protections include
cycle-by-cycle current limiting and thermal
shutdown.
The MP2144 is available in small TSOT23-8
package and requires only a minimal number of
readily available standard external components.
The MP2144 is ideal for a wide range of
applications including high-performance DSPs,
FPGAs, smartphones, portable instruments,
and DVD drivers.
FEATURES
• Wide 2.5V-to-5.5V Operating Input Range
• Output Voltage as Low as 0.6V
• 100% Duty Cycle in Dropout
• Up to 2A Output Current
• Low IQ: 40µA
• 90mΩ and 60mΩ Internal Power MOSFET
Switches
• Default 1.2MHz Switching Frequency
• EN and Power-Good for Power Sequencing
• Cycle-by-Cycle Over-Current Protection
• Auto Discharge at Power-Off
• Short-Circuit Protect with Hiccup Mode
• Stable with Low-ESR Output Ceramic
Capacitors
• Available in a TSOT23-8 Package
APPLICATIONS
• Low Voltage I/O System Power
• Handheld/Battery-powered Systems
• Wireless/Networking Cards
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
VIN
2.5V to 5.5V
C1
10 F
EN
PG
2
VIN
SW ³
5
OUT
MP2144
8
EN
7
FB
1 _PG
GND
4, 6
L1
1
R1
200
R2
200k
VOUT
100
1.2V/2A
90
80
C2
70
10
60
50
40
30
20
10
0
0.001 0.01 0.1
1
10
MP2144 Rev. 1.03
www.MonolithicPower.com
1
12/20/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.