MP2932 - 6-PHASE PWM CONTROLLER WITH 8-BIT ADC CODE

MP2932 Rev.1.02

www.MonolithicPower.com

6

4/30/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

Pin #

Name

Description

34

ISEN3-

Phase 3 current sense amplifier differential input.

35

ISEN3+

36

PWM3

Phase 3 PWM output.

37

PWM6

Phase 6 PWM output.

38

ISEN6+

Phase 6 current sense amplifier differential input

39

ISEN6-

40

EN_PWR

Enable pin. It is used to synchronize power-up of the controller and MOSFET driver

ICs.

41

EN_VTT

Enable pin. It is controlled by output of VTT voltage regulator in the mother board.

42

FS

PWM frequency set pin. A resistor from FS to GND will set the switching frequency.

43

SS

Soft start oscillator frequency set pin. A resistor from SS to GND will set up the soft-

start ramp rate.

44

OVP

Overvoltage protection output indication pin. It can be pulled to VCC and is latched

when an overvoltage condition is detected.

45

VR_RDY

Open drain logic output. When soft start completed and output voltage is regulated in

the value determined by ID setting, VR_RDY is logic high.

46

VR_FAN

Open drain logic output. It is open when VR temperature reaches certain value

47

VR_HOT

Open drain logic output. It is open when VR temperature reaches certain value

48

TM

NTC resistor in this pin is used to monitor inductor temperature. Connect this pin

through an NTC thermistor to GND and a resistor to VCC of the controller. The voltage

at this pin is reverse proportional to the VR temperature.