MP2113 Datasheet, PDF (1/13 Pages) Monolithic Power Systems – 1.5A Synchronous Step-Down Converter with Dynamic Voltage Control

The Future of Analog IC Technology
MP2113
1.5A Synchronous Step-Down Converter
with Dynamic Voltage Control
DESCRIPTION
The MP2113 is a fully integrated, internally
compensated 1.5MHz fixed frequency PWM
step-down converter with dynamic output
voltage control. User can select two operation
modes, forced PWM and asynchronous mode.
Force PWM is ideal for high load operation
while asynchronous mode improves efficiency
at light load condition. Each mode has
independent output level that can be set by the
user to optimize the power efficiency. It is ideal
for powering portable equipment that runs from
a single cell Lithium-Ion (Li+) Battery, with an
input range from 2.7V to 6V. The MP2113 can
provide 1.5A of load current in forced PWM
mode and 50mA in asynchronous mode. Both
output voltage can be regulated to as low as
0.6V.
MP2113 integrates the high side switch, a
synchronous rectifier for forced PWM mode and
a Schottky diode for asynchronous mode
operation. With peak current mode control and
internal compensation, the MP2113 is stable
with ceramic capacitors and small inductors.
Fault condition protection includes cycle-by-
cycle current limiting and thermal shutdown.
MP2113 is available in the small 8-pin
2mmx3mm QFN package.
FEATURES
• User Selectable Operation Mode: Forced
PWM and Asynchronous Mode
• User Programmable Output Level for Each
Operation Mode
• Dynamic Output Voltage Control
• Up to 1.5A Output Current for Forced PWM
Mode, 50mA for Asynchronous Mode
• Internal Power MOSFET Switches and
Schottky diode
• Stable with Low ESR Output Ceramic
Capacitors
• Up to 95% Efficiency
• 1µA Shutdown Current.
• 1.5MHz Switching Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Short circuit protection
• Power-Good Output
• 2.7-6V Input Operation Range
• Output Adjustable from 0.6V to VIN
• Available in 8-pin 2x3mm QFN Package
APPLICATIONS
• DVD+/-RW Drives
• Smart Phones
• PDAs
• Digital Cameras
• Portable Instruments
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
V_IN 2.7-6V
C_IN
4.7uF
MP2113
IN
PGOOD
SW
CTRL
FB
EN
GND
DRN
L1
2.2uH
R4
500K
R3
200K
R1
301K
R2
604K
C_OUT
22uF
V_OUT
1.8V/1.5A
Efficiency vs. Load Current
95
90
Vin=3V
Vin=5V
85
Vin=6V
80
75
70
65
60
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5
LOAD CURRENT(A)
MP2113 Rev. 1.0
www.MonolithicPower.com
1
4/4/2011
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© 2011 MPS. All Rights Reserved.