ISL6260CCRZ Datasheet, PDF (2/28 Pages) Intersil Corporation – Multiphase PWM Regulator for IMVP-6+ Mobile CPUs

ISL6260C
Pinout
ISL6260C
(40 LD QFN)
TOP VIEW
40 39 38 37 36 35 34 33 32 31
PSI# 1
PMON 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
Functional Pin Description
PSI#
Low load current indicator input. When asserted low,
indicates a reduced load-current condition. For ISL6260C,
when PSI# is asserted low, PWM2 will be disabled.
PMON
An analog output. PMON sends out an analog signal
proportional to the product of VCCSENSE voltage and the
droop voltage.
RBIAS
147k Resistor to VSS sets internal current reference.
VR_TT#
Thermal overload output indicator.
NTC
Thermistor input to VR_TT# circuit.
SOFT
A capacitor from this pin to Vss sets the maximum slew rate
of the output voltage. It affects both soft start and VID
transitioning slew rate. 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
microprocessor die.
RTN
Remote voltage sensing return. Connect to ground at
microprocessor 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.
2
FN9259.3
June 21, 2010