MP2362 — DUAL 2A, 23V, 380KHZ STEP-DOWN CONVERTER

MP2362 Rev. 0.93

www.MonolithicPower.com

4

1/25/2010

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PIN FUNCTIONS

Pin #

Name

Description

1

SYNCA

Synchronization Input for Channel A. It is internally pulled down to ground with a 11kΩ

resistor. Leave it open if unused.

2

NC

No Connect

3

BSA

High-Side Driver Boost Pin. Connect a 10nF capacitor from this pin to SWA.

4

INA

Supply Voltage Channel A. The MP2362 operates from a +4.75V to +23V unregulated input.

Input Ceramic Capacitors should be close to this pin.

5

SWA

Switch Channel A. This connects the inductor to either INA through M1A or to PGA through M2A.

6

PGA

Power Ground Channel A. This is the Power Ground Connection to the input capacitor

ground.

7

SGA

Signal Ground Channel A. This pin is the signal ground reference for the regulated output

voltage. For this reason care must be taken in its layout. This node should be placed outside

of the D1 to C1 ground path to prevent switching current spikes from inducing voltage noise

into the part.

8

FBB

Feedback Voltage for Channel B. This pin is the feedback voltage. The output voltage is ratio scaled

through a voltage divider, and the center point of the divider is connected to this pin. The voltage is

compared to the on board 1.22V reference.

9

COMPB

Compensation Channel B. This is the output of the transconductance error amplifier. A series

RC is placed on this pin for proper control loop compensation. Please refer to more in the

datasheet.

10

ENB

Enable/UVLO Channel B. A voltage greater than 2.62V enables operation. Leave ENB

unconnected for automatic startup. An Under Voltage Lockout (UVLO) function can be

shutdown the ENB pin voltage needs to be less than 700mV.

11

SYNCB

Synchronization Input for Channel B. It is internally pulled down to ground with a 11kΩ

resistor. Leave it open if unused.

12

BSB

High-Side Driver Boost Pin. Connect a 10nF capacitor from this pin to SWB.

13

NC

No Connect.

14

INB

Supply Voltage Channel B. The MP2362 operates from a +4.75V to +23V unregulated input.

Input Ceramic Capacitors should be close to this pin.

15

SWB

Switch Channel B. This connects the inductor to either INB through M1B or to PGB through M2B.

16

PGB

Power Ground Channel B. This is the Power Ground Connection to the input capacitor

ground.

17

SGB

Signal Ground Channel B. This pin is the signal ground reference for the regulated output

voltage. For this reason care must be taken in its layout. This node should be placed outside

of the D1 to C1 ground path to prevent switching current spikes from inducing voltage noise

into the part.

18

FBA

Feedback Voltage for Channel A. This pin is the feedback voltage. The output voltage is ratio scaled

through a voltage divider, and the center point of the divider is connected to this pin. The voltage is

compared to the on board 1.22V reference.

19

COMPA

Compensation Channel A. This is the output of the transconductance error amplifier. A series

RC is placed on this pin for proper control loop compensation. Please refer to more in the

datasheet.

20

ENA

Enable/UVLO Channel A. A voltage greater than 2.62V enables operation. Leave ENA

unconnected for automatic startup. An Under Voltage Lockout (UVLO) function can be

shutdown the ENA pin voltage needs to be less than 700mV.