MP2116 –2A, 6V, 100% DUTY CYCLE SYNCHROOUS STEP-DOWN CONVERTER WITH 0.5A LDO

MP2116 Rev.1.0

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4

1/17/2013

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PIN FUNCTIONS

Pin #

Name

Description

1

FB1

Feedback Input for the switcher output VOUT1.

2

EN1

Enable Input for the switcher.

3

IN1

Main Input Supply Pin. Input supply for both the switcher and the low dropout (LDO)

linear regulator, except the LDO output power device.

4

SW1

Switch node of the switcher.

5

GND

(Exposed Pad)

Ground. Exposed pad must be connected to GND pin.

6

IN2

Input Supply for the linear regulator LDO output power device. Bypass with a 2.2uF

from IN2 to GND.

7

OUT2

Output of the 500mA LDO. The LDO is designed to be stable with an external 4.7µF

ceramic capacitor (minimum).

8

PWROK

Power OK Open Drain Output. HIGH output indicates that both outputs are within

±10%

of the regulation value. LOW output indicates that the output is out of

±10% window.

PWROK is pulled down in shutdown. The PWROK window comparators have 50μs

deglitch timer for the switcher and 150µs deglitch timer for the linear regulator LDO to

avoid false trigger during load transient.

9

EN2

Enable Input for the low-dropout LDO

10

FB2

Feedback Input for the LDO output VOUT2.