MP103 Rev. 1.01

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9

1/23/2014

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PIN FUNCTIONS

Pin #

Name

Description

1

RT

Temperature sensing input pin. Connected through a NTC resistor to GND. Once the

voltage of the RT pin drops below a fixed limit of 0.8V, DR output and LDO will be disabled.

Let this pin float if external temperature sensing function is not used.

2

GND

Ground.

3

FB

Output voltage feedback. Connect to a capacitor to VOUT to improve low dropout stability.

Internally voltage divider set the output to be 12V. Connect to the tap of a resistor divider to

adjust the output voltage.

4

5

VB

Connect a cap from this pin to GND to store the energy for the low drop-out stage.

6

DR

BJT driver pin.The driver is capable of providing 0.2A source current to drive external BJT.

7

NC

Not connected.

8

VIN

Voltage input supply. Providing energy when the voltage falls within the charging window.

Exposed

Pad

Connect to a large copper surface connected to GND to enhance thermal dissipation.