MP2136 Datasheet, PDF (1/11 Pages) Monolithic Power Systems – 2.5V to 6V Input, 2MHz, 1A Synchronous Step-Down Converter

The Future of Analog IC Technology
DESCRIPTION
The MP2136 is a 2MHz constant frequency,
current mode, PWM step-down converter with
integrated main switch and synchronous
rectifier that is ideal for powering portable
equipment that runs from a single Li-Ion or Li-
Polymer battery.
The MP2136 can supply up to 1A load current
from a 2.5V to 6V input voltage. The output
voltage can be as low as 0.6V.
Additional features include <1µA shutdown
current, internal soft-start, cycle-by-cycle over
current protection, short circuit protection, and
thermal shutdown.
The MP2136 is available in a 6-pin, QFN6
2mm×2mm package.
MP2136
2.5V to 6V Input, 2MHz, 1A
Synchronous Step-Down Converter
FEATURES
• 2MHz Constant Switching Frequency
• 1A Available Load Current
• 2.5V to 6V Input Voltage Range
• Output Voltage as Low as 0.6V
• Current Mode Control
• Cycle-by-Cycle Over Current Protection
• Short Circuit Protection
• Thermal Shutdown
• <1µA Shutdown Current
• Internal Soft-Start
• Space-Saving 6-pin, QFN6 2mm×2mm
package
APPLICATIONS
• Cellular Phones
• Microprocessors and DSP Core Supplies
• PDAs and Smart Phones
• MP3 and Portable Media Players
• Digital Still and Video Cameras
• Portable Instruments
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
2.5V - 6V
OFF ON EN
C1
4.7uF
U1
3 _IN
4
SW
MP2136EG
L1
1.2uH
2 _EN
1 _NC
FB ⁶
5
GND
R1
300k
1%
R2
300k
1%
VOUT
C2 ^1.2V/1A
10uF
Efficiency vs.
Output Current
L=2.2uH Vo=1.2V
100
Vin=3.3V
90
80
70
Vin=6V
Vin=2.5V
60
Vin=5V
50
40
30
20
10
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
OUTPUT CURRENT (A)
MP2136 Rev. 0.9
www.MonolithicPower.com
1
8/23/2010
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