Mp2012 (U176); General Description; Features; Pinning - Sharp LC-22DV510E Service Manual

LC-22DV510
LC-24DV510
17.
18.

MP2012 (U176)

17.1
18.1.

General Description

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
17.2
condition protection includes cycle-by-cycle current limiting and thermal shutdown.
18.2.

Features


2.7-6V Input Operation Range

Output Adjustable from 0.8V to VIN

1μA Max Shutdown Current.

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
17.3

Available in 6-pin 3x3mm QFN
18.3.

Pinning

Pin
#
1
2
3
4
5
6
Name Description
FB Feedback input. An external resistor divider from the output
to GND, tapped to the FB pin sets the output voltage.
GND, Exposed Ground pin. Connect exposed pad to ground plane for
Pad proper thermal performance.
SW Switch node to the inductor.
PVIN Input supply pin for power FET.
VIN Input Supply pin for controller. Put small decoupling
ceramic near this pin.
EN Enable input, "High" enables MP2012. EN is pulled to GND
with 1Meg internal resistor.
58