MP5410—LOW START-UP VOLTAGE BOOST CONVERTER WITH FOUR SPDT SWITCHES

MP5410 Rev.1.01

www.MonolithicPower.com

4

3/28/2011

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PIN FUNCTIONS

Pin #

Name

Pin Function

1

L

Inductor Output Pin. L is the output node of the internal disconnecting switch. Connect the

inductor to this pin.

2

EN

On/Off control input. A logic high input turns on the chip. A logic low input turns off the chip.

This pin should not be left floating.

3

S1

Channel B SPDT Switch Control Input. If the chip is enabled, a logic low input switches B to

GND and a logic high input switches B to OUT. This pin should not be left floating.

4

S0

Channel A SPDT Switch Control Input. If the chip is enabled, a logic low input switches A to

GND and a logic high input switches A to OUT. This pin should not be left floating.

5

A

Channel A SPDT Switch Output.

6

B

Channel B SPDT Switch Output.

7

C

Channel C SPDT Switch Output.

8

D

Channel D SPDT Switch Output.

9

S3

Channel D SPDT Switch Control Input. If the chip is enabled, a logic low input switches D to

GND and a logic high input switches D to OUT. This pin should not be left floating.

10

S2

Channel C SPDT Switch Control Input. If the chip is enabled, a logic low input switches C to

GND and a logic high input switches C to OUT. This pin should not be left floating.

11

FB

Regulation Feedback Input. Connect to an external resistive voltage divider from the output

to FB to set the boost converter output voltage. Floating this pin to achieve fixed 10V output.

12

ISET

Constant Peak Current Set. Connect to an external resistor to GND to set the boost

converter peak current.

13

GND

Ground.

14

IN

Input Supply Pin. IN pin powers the internal circuitry and is the input node of the internal

disconnecting switch. Must be locally bypassed.

15

SW

Output Switch Node. SW is the drain node of the internal low-side N-Channel MOSFET.

Connect the inductor to SW to complete the step-up converter.

16

OUT

Step-up Converter Output.

Exposed

Pad

Connect exposed pad to GND plane in PCB for proper thermal performance.