ISL62882 查看數據表（PDF） - Renesas Electronics

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ISL62882

Multiphase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs

Renesas Electronics 

ISL62882, ISL62882B

Pin Configurations

ISL62882

(40 LD TQFN)

TOP VIEW

ISL62882B

(48 LD TQFN)

TOP VIEW

40 39 38 37 36 35 34 33 32 31

PGOOD 1

PSI# 2

RBIAS 3

VR_TT# 4

NTC 5

VW 6

COMP 7

FB 8

FB2 9

ISEN2 10

GND PAD

(BOTTOM)

30 BOOT2

29 UGATE2

28 PHASE2

27 VSSP2

26 LGATE2

25 VCCP

24 LGATE1b

23 LGATE1a

22 VSSP1

21 PHASE1

11 12 13 14 15 16 17 18 19 20

48 47 46 45 44 43 42 41 40 39 38 37

NC 1

PGOOD 2

PSI# 3

RBIAS 4

VR_TT# 5

NTC 6

GND 7

VW 8

COMP 9

FB 10

FB2 11

NC 12

(BOTTOM)

36 BOOT2

35 UGATE2

34 PHASE2

33 VSSP2

32 LGATE2

31 NC

30 VCCP

29 LGATE1b

28 LGATE1a

27 VSSP1

26 PHASE1

25 UGATE1

13 14 15 16 17 18 19 20 21 22 23 24

Functional Pin Descriptions

ISL62882

-

1

ISL62882B

7

2

2

3

3

4

4

5

5

6

6

8

7

9

8

10

9

11

10

13

11

14

12

15

SYMBOL

GND

PGOOD

PSI#

RBIAS

VR_TT#

NTC

VW

COMP

FB

FB2

ISEN2

ISEN1

VSEN

DESCRIPTION

Signal common of the IC. Unless otherwise stated, signals are referenced to the GND pin.

Power-Good open-drain output indicating when the regulator is able to supply regulated voltage.

Pull-up externally with a 680 resistor to VCCP or 1.9k to 3.3V.

Low load current indicator input. When asserted low, indicates a reduced load current condition.

A resistor to GND sets internal current reference. Use 147k or 47k. The choice of Rbias value,

together with the ISEN2 pin configuration and the external resistance from the COMP pin to GND,

programs the controller to enable/disable the overshoot reduction function and to select the

CPU/GPU mode.

Thermal overload output indicator.

Thermistor input to VR_TT# circuit.

A resistor from this pin to COMP programs the switching frequency (8k gives approximately

300kHz).

This pin is the output of the error amplifier. Also, a resistor across this pin and GND adjusts the

overcurrent threshold.

This pin is the inverting input of the error amplifier.

There is a switch between the FB2 pin and the FB pin. The switch is on in 2-phase mode and is

off in 1-phase mode. The components connecting to FB2 are used to adjust the compensation

in 1-phase mode to achieve optimum performance.

Individual current sensing for Phase 2. When ISEN2 is pulled to 5V VDD, the controller will

disable Phase 2.

Individual current sensing for phase 1.

Remote core voltage sense input. Connect to microprocessor die.

FN6890 Rev 4.00

June 21, 2011

Page 2 of 41

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