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ISL6263CHRZ-T

5-Bit VID Single-Phase Voltage Regulator with Current Monitor for GPU Core Power

Renesas Electronics 

ISL6263C

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5-Bit VID Single-Phase Voltage Regulator with Current Monitor for GPU Core

Power

DATASHEET

FN6745

Rev 1.00

July 8, 2010

The ISL6263C IC is a Single-Phase Synchronous-Buck

PWM voltage regulator for GPU core power application. It

features Intersil’s Robust Ripple Regulator (R3)

Technology™. Integrated current monitor, differential remote

sense amplifier, MOSFET driver and bootstrap diode result

in smaller implementation area and lower component cost.

Intersil’s R3 Technology™ combines the best features of

both fixed-frequency PWM and hysteretic PWM, delivering

excellent light-load efficiency and superior load transient

response by commanding variable switching frequency

during the transitory event. For maximum conversion

efficiency, the ISL6263C automatically enters diode

emulation mode (DEM) when the inductor current attempts

to flow negative. DEM is highly configurable and easy to

set-up. A PWM filter can be enabled, which prevents the

switching frequency from entering the audible spectrum as a

result of extremely light load while in DEM.

The GPU core voltage can be dynamically programmed from

0.41200V to 1.28750V by the five VID input pins without

requiring sequential stepping of the VID states. The

ISL6263C requires only one capacitor for both the soft-start

slew-rate and the dynamic VID slew-rate by internally

connecting the SOFT pin to the appropriate current source.

The voltage Kelvin sensing is accomplished with an

integrated unity-gain true differential amplifier.

Ordering Information

PART NUMBER

PART

(Notes 2, 3)

MARKING

TEMP

RANGE

(°C)

PACKAGE PKG.

(Pb-Free) DWG. #

ISL6263CHRZ ISL6263 CHRZ -10 to +100 32 Ld 5x5 QFN L32.5x5

ISL6263CHRZ-T ISL6263 CHRZ -10 to +100 32 Ld 5x5 QFN L32.5x5

(Note 1)

NOTES:

1. Please refer to TB347 for details on reel specifications.

2. These Intersil Pb-free plastic packaged products employ special Pb-

free material sets, molding compounds/die attach materials, and 100%

matte tin plate plus anneal (e3 termination finish, which is RoHS

compliant and compatible with both SnPb and Pb-free soldering

operations). Intersil Pb-free products are MSL classified at Pb-free

peak reflow temperatures that meet or exceed the Pb-free

requirements of IPC/JEDEC J STD-020.

3. For Moisture Sensitivity Level (MSL), please see device information

page for ISL6263C. For more information on MSL please see techbrief

TB363.

Features

• Precise Single-Phase Core Voltage Regulator

- 0.5% System Accuracy 0°C to +100°C

- Differential Remote GPU Die Voltage Sense

• Real-Time GPU Current Monitor Output

• Applications up to 25A

• Input Voltage Range: +5.0V to +25.0V

• Programmable PWM Frequency: 200kHz to 500kHz

• Pre-Biased Output Start-Up Capability

• 5-Bit Voltage Identification Input (VID)

- 0.41200V to 1.28750V

- 25.75mV Steps

- Sequential or Non-Sequential VID Change On-the-Fly

• Configurable PWM Modes

- Forced Continuous Conduction Mode

- Automatic Entry and Exit of Diode Emulation Mode

- Selectable Audible Frequency PWM Filter

• Integrated MOSFET Drivers and Bootstrap Diode

• Choice of Current Sense Schemes

- Lossless Inductor DCR Current Sense

- Precise Resistive Current Sense

• Overvoltage, Undervoltage and Overcurrent Protection

• Pb-Free (RoHS Compliant)

Pinout

ISL6263C

(32 LD 5x5 QFN)

TOP VIEW

RBIAS 1

32 31

30 29 28 27

26 25

24 VID1

SOFT 2

23 VID0

OCSET 3

22 PVCC

VW 4

COMP 5

THERMAL PAD

(BOTTOM)

21 LGATE

20 PGND

FB 6

19 PHASE

VDIFF 7

18 UGATE

VSEN 8

17 BOOT

9 10 11 12 13 14 15 16

FN6745 Rev 1.00

July 8, 2010

Page 1 of 18

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