ISL8102 Intersil Corporation, ISL8102 Datasheet

ISL8102

Manufacturer Part Number

ISL8102

Description

Two-Phase Buck PWM Controller

Manufacturer

Intersil Corporation

Datasheet

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Two-Phase Buck PWM Controller with

High Current Integrated MOSFET Drivers

The ISL8102 is a two-phase PWM control IC with integrated

MOSFET drivers. It provides a precision voltage regulation

system for multiple applications including, but not limited to,

high current low voltage point-of-load converters, embedded

applications and other general purpose low voltage medium

to high current applications. The integration of power

MOSFET drivers into the controller IC marks a departure

from the separate PWM controller and driver configuration of

previous multi-phase product families. By reducing the

number of external parts, this integration allows for a cost

and space saving power management solution.

Output voltage can be programmed using the on-chip DAC

or an external precision reference. A two bit code programs

the DAC reference to one of 4 possible values (0.6V, 0.9V,

1.2V and 1.5V). A unity gain, differential amplifier is provided

for remote voltage sensing, compensating for any potential

difference between remote and local grounds. The output

voltage can also be offset through the use of single external

resistor. An optional droop function is also implemented and

can be disabled for applications having less stringent output

voltage variation requirements or experiencing less severe

step loads.

A unique feature of the ISL8102 is the combined use of both

DCR and r

positioning and overcurrent protection are accomplished

through continuous inductor DCR current sensing, while

balance. Using both methods of current sampling utilizes the

best advantages of each technique.

Protection features of this controller IC include a set of

sophisticated overvoltage and overcurrent protection.

Overvoltage results in the converter turning the lower

MOSFETs ON to clamp the rising output voltage and protect

the load. An OVP output is also provided to drive an optional

crowbar device. The overcurrent protection level is set

through a single external resistor. Other protection features

include protection against an open circuit on the remote

sensing inputs. Combined, these features provide advanced

protection for the output load.

Ordering Information

* Add “-T” suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate

termination finish, which are 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.

DS(ON)

ISL8102CRZ (Note)

ISL8102IRZ (Note)

ISL8102EVAL1

PART NUMBER*

current sensing is used for accurate channel-current

DS(ON)

current sensing. Load line voltage

ISL8102CRZ

ISL8102IRZ

Evaluation Platform

PART MARKING

Data Sheet

1-888-INTERSIL or 1-888-468-3774

TEMPERATURE (°C)

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

-40 to 85

0 to 70

Features

• Integrated Multi-Phase Power Conversion

• Precision Output Voltage Regulation

• Precision Channel Current Sharing

• Optional Load Line (Droop) Programming

• Variable Gate-Drive Bias - 5V to 12V

• Internal or External Reference Voltage Setting

• Overcurrent Protection

• Multi-tiered Overvoltage Protection

• Selectable Operation Frequency up to 1.5MHz per phase

• Digital Soft-Start

• Capable of Start-up in a Pre-Biased Load

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• High Current DDR/Chipset core voltage regulators

• High Current, Low voltage DC/DC converters

• High Current, Low voltage FPGA/ASIC DC/DC converters

- 1 or 2 Phase Operation

- Differential Remote Voltage Sensing

- ±0.8% System Accuracy Over Temperature

- ±0.5% System Accuracy Over Temperature

- Usable for output voltages not exceeding 2.3V

- Adjustable Reference-Voltage Offset

- Uses Loss-Less r

- Uses Loss-Less Inductor DCR Current Sampling

- On-Chip Adjustable Fixed DAC Reference voltage with

- Reference can be Changed Dynamically

- Can use an External Voltage Reference

- OVP Pin to Drive Optional Crowbar Device

(for REF=0.6V and 0.9V)

(for REF=1.2V and 1.5V)

2-bit Logic Input Selects from Four Fixed Reference

Voltages (0.6V, 0.9V, 1.2V, 1.5V)

October 19, 2005

All other trademarks mentioned are the property of their respective owners.

32 Ld 5x5 QFN (Pb-free)

Intersil (and design) is a registered trademark of Intersil Americas Inc.

PACKAGE

DS(ON)

Current Sampling

L32.5x5

ISL8102

PKG. DWG. #

FN9247.0

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