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ISL6223

Mobile Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller

Renesas Electronics 

ISL6223

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Mobile Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM

Controller

DATASHEET

FN9013

Rev 3.00

July 9, 2008

The ISL6223 multi-phase PWM control IC together with its

companion gate drivers, the HIP6601, HIP6602 or HIP6603

and Intersil MOSFETs provides a precision voltage

regulation system for advanced mobile microprocessors. A

single-stage regulator that directly converts a battery voltage

to a microprocessor core voltage can be designed when high

voltage drivers are employed. Multiphase power conversion

is a marked departure from earlier single phase converter

configurations previously employed to satisfy the ever

increasing current demands of modern microprocessors.

Multi-phase converters, by distributing the power and load

current, result in smaller and lower cost transistors with

fewer input and output capacitors. These reductions accrue

from the higher effective conversion frequency with higher

frequency ripple current due to the phase interleaving

process of this topology. For example, a two phase converter

operating at 350kHz will have a ripple frequency of 700kHz.

Moreover, greater converter bandwidth of this design results

in faster response to load transients.

Outstanding features of this controller IC include

programmable VID codes from the microprocessor that

range from 0.925V to 2.00V with a system accuracy of 1%.

Pull up currents on these VID pins eliminates the need for

external pull up resistors. In addition “droop” compensation,

used to reduce the overshoot or undershoot of the CORE

voltage, is easily programmed with a single resistor.

Another feature of this controller IC is the PGOOD monitor

circuit which is held low until the CORE voltage increases,

during its Soft-Start sequence, to 0.9V. Overvoltage, the

CORE voltage going above 2.35V, results in the converter

shutting down and turning the lower MOSFETs ON to clamp

and protect the microprocessor. Under voltage is also

detected and results in PGOOD low if the CORE voltage

falls below 0.9V. Overcurrent protection reduces the

regulator current to less than 25% of the programmed trip

value. An external capacitor connected to the DACOUT pin

and ground slows down the transition of the DAC output to

avoid triggering the overcurrent protection when the VID

code changes. These features provide monitoring and

protection for the microprocessor and power system.

Features

• Mobile VID Compatible Multi-Phase Power Conversion

• Precision Channel Current Sharing

- Loss Less Current Sampling - Uses rDS(ON)

• Precision CORE Voltage Regulation

- 1% System Accuracy Over Temperature

• Microprocessor Voltage Identification Input

- 5-Bit VID Input

- 1.30V to 2.00V in 50mV Steps

- 0.925V to 1.275V in 25mV Steps

- Programmable “Droop” Voltage

• Fast Transient Recovery Time

• Over Current Protection

• High Ripple Frequency (Channel Frequency Times

Number of Channels, Two) . . . . . . . . . . .100kHz to 3MHz

• Pb-free available (RoHS compliant)

Ordering Information

PART

NUMBER

PART

MARKING

TEMP.

(°C)

PKG.

PACKAGE DWG. #

ISL6223CA ISL 6223CA 0 to +70 20 Ld SSOP M20.15

ISL6223CAZA ISL6 223CAZ 0 to +70 20 Ld SSOP M20.15

(Note)

(Pb-free)

*Add “-T” suffix for tape and reel. Please refer to TB347 for details on

reel specifications.

NOTE: 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.

Pinout

ISL6223 (SSOP)

TOP VIEW

VID4 1

VID3 2

VID2 3

VID1 4

VID0 5

COMP 6

FB 7

FS/DIS 8

GND 9

VSEN 10

20 VCC

19 PGOOD

18 NC

17 NC

16 ISEN1

15 PWM1

14 PWM2

13 ISEN2

12 NC

11 DACOUT

FN9013 Rev 3.00

July 9, 2008

Page 1 of 15

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