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LC-40SH340E
LC-40SH340K
17.
18.
MP2012 (U176)
17.1
18.1.
The MP2012 is a fully integrated, internally compensated 1.2MHz fixed frequency PWM step-down
converter. 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 MP2012 can provide up to 1.5A of load current with output voltage
as low as 0.8V. It can also operate at 100% duty cycle for low dropout applications. With peak current mode
control and internal compensation, the MP2012 is stable with ceramic capacitors and small inductors. Fault
condition protection includes cycle-by-cycle current limiting and thermal shutdown.
17.2
18.2.
x
x
x
x
x
x
x
x
x
x
x
x
x
17.3
18.3.
Pin
#
1
2
3
4
5
6
General Description
Features
2.7-6V Input Operation Range
Output Adjustable from 0.8V to VIN
—$ 0D[ 6KXWGRZQ &Xrrent.
Up to 95% Efficiency
100% Duty Cycle for Low Dropout
Applications
1.2MHz Fixed Switching Frequency
Stable with Low ESR Output Ceramic
Capacitors
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Short Circuit Protection
Available in 6-pin 3x3mm QFN
Pinning
Name
FB
GND, Exposed
Pad
SW
PVIN
VIN
EN
Description
Feedback input. An external resistor divider from the output
to GND, tapped to the FB pin sets the output voltage.
Ground pin. Connect exposed pad to ground plane for
proper thermal performance.
Switch node to the inductor.
Input supply pin for power FET.
Input Supply pin for controller. Put small decoupling
ceramic near this pin.
Enable input, "High" enables MP2012. EN is pulled to GND
with 1Meg internal resistor.
56
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