ISL6260 View Datasheet(PDF) - Intersil

Part Name

Description

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ISL6260

Multiphase Core Regulator for IMVP-6 Mobile CPUs

Intersil 

ISL6260, ISL6260B

Functional Pin Description

40 39 38 37 36 35 34 33 32 31

PSI# 1

PGD_IN 2

RBIAS 3

VR_TT# 4

NTC 5

SOFT 6

OCSET 7

VW 8

COMP 9

FB 10

GND PAD

(BOTTOM)

30 VID2

29 VID1

28 VID0

27 PWM1

26 PWM2

25 PWM3

24 FCCM

23 ISEN1

22 ISEN2

21 ISEN3

11 12 13 14 15 16 17 18 19 20

PSI#

Low load current indicator input. When asserted low,

indicates a reduced load-current condition. For ISL6260B,

when PSI# is asserted low, PWM2 will be disabled.

PGD_IN

Digital Input. When asserted high, indicates VCCP and

VCC_MCH voltages are within regulation. PGD_IN signal

high is needed for the CLK_EN# to be low and PGOOD to

be high.

RBIAS

147K Resistor to VSS sets internal current reference.

VR_TT#

Thermal overload output indicator.

NTC

Thermistor input to VRTT# circuit.

SOFT

A capacitor from this pin to Vss sets the maximum slew rate

of the output voltage. Soft pin is the non-inverting input of the

error amplifier.

OCSET

Overcurrent set input. A resistor from this pin to VO sets

DROOP voltage limit for OC trip. A 10µA current source is

connected internally to this pin.

VW

A resistor from this pin to COMP programs the switching

frequency. (7kΩ gives approximately 300kHz). VW pin

sources current.

COMP

This pin is the output of the error amplifier.

FB

This pin is the inverting input of error amplifier.

VDIFF

This pin is the output of the differential amplifier.

VSEN

Remote core voltage sense input. Connect to micro-

processor die.

RTN

Remote voltage sensing return. Connect to ground at micro-

processor die.

DROOP

Output of droop amplifier. Output = VO + DROOP.

DFB

Inverting input to droop amplifier.

VO

An input to the IC that reports the local output voltage.

VSUM

This pin is connected to the current summation junction.

VIN

Battery supply voltage, used for feed forward.

VSS

Signal ground; Connect to local controller ground.

VDD

5V bias power.

ISEN3

Individual current sensing for channel 3.

ISEN2

Individual current sensing for channel 2.

ISEN1

Individual current sensing for channel 1.

FCCM

Forced Continuous Conduction Mode (FCCM) enable pin to

MOSFET drivers. It will disable diode emulation.

PWM3

PWM output for channel 3.

2

FN9162.1

January 3, 2006

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