ISL6431IB-T datasheet, PDF - EEWORLD Datasheet

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ISL6431IB-T: DescriptionSWITCHING CONTROLLER, 340kHz SWITCHING FREQ-MAX, PDSO8, PLASTIC, MS-012AA, SOIC-8; CategoryPower/power management The power supply circuit; File Size179KB，10 Pages; ManufacturerRenesas Electronics Corporation; Websitehttps://www.renesas.com/

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ISL6431IB-T Overview

SWITCHING CONTROLLER, 340kHz SWITCHING FREQ-MAX, PDSO8, PLASTIC, MS-012AA, SOIC-8

ISL6431IB-T Parametric

Parameter Name	Attribute value
Maker	Renesas Electronics Corporation
Parts packaging code	SOIC
package instruction	SOP,
Contacts	8
Reach Compliance Code	unknow
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER
control mode	VOLTAGE-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	5.5 V
Minimum input voltage	4.5 V
Nominal input voltage	5 V
JESD-30 code	R-PDSO-G8
length	4.9 mm
Number of functions	1
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Certification status	Not Qualified
Maximum seat height	1.75 mm
surface mount	YES
Switch configuration	PUSH-PULL
Maximum switching frequency	340 kHz
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
width	3.9 mm

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ISL6431

Data Sheet

June 2001

File Number

9018

Advanced Pulse-Width Modulation (PWM)

Controller for Home Gateways

The ISL6431 is a high efficiency, fixed frequency,

synchronous buck PWM controller. It is designed for use in

applications that convert 5V to lower distributed voltages

required for set-top box, cable modem, DSL modem and

residential home gateway core processor, memory and

peripheral power supplies.

This device makes simple work out of implementing a

complete control and protection scheme for a DC-DC

stepdown converter. Designed to drive N-channel MOSFETs

in a synchronous buck topology, the ISL6431 integrates the

control, output adjustment, monitoring and protection

functions into a single 8-pin package.

The ISL6431 provides simple, single feedback loop, voltage-

mode control with fast transient response. The output

voltage can be precisely regulated to as low as 0.8V, with a

maximum tolerance of ±1.5% over temperature and line

voltage variations. A fixed frequency oscillator reduces

design complexity, while balancing typical application cost

and efficiency.

The error amplifier features a 15MHz gain-bandwidth

product and 6V/µs slew rate which enables high converter

bandwidth for fast transient performance. The resulting

PWM duty cycles range from 0% to 100%.

Protection from overcurrent conditions is provided by

monitoring the r

DS(ON)

of the upper MOSFET to inhibit PWM

operation appropriately. This approach simplifies the

implementation and improves efficiency by eliminating the

need for a current sense resistor.

Features

• Operates from +5V Input

• 0.8V to V

Output Range

- 0.8V Internal Reference

- ±1.5% Over Line Voltage and Temperature

• Drives N-Channel MOSFETs

• Simple Single-Loop Control Design

- Voltage-Mode PWM Control

• Fast Transient Response

• Lossless, Programmable Overcurrent Protection

- Uses Upper MOSFET’s r

DS(ON)

• Small Converter Size

- 300kHz Fixed Frequency Oscillator

- Internal Soft Start

- 8 Lead SOIC Package

• High Conversion Efficiency

• Synchronous/Standard Buck Configuration

Applications

• Cable Modems, Set Top Boxes, and DSL Modems

• DSP and Core Communications Processor Supplies

• Power Supplies for Microprocessors and Embedded

Controllers

• Memory Supplies

• Personal Computer Peripherals

• Industrial Power Supplies

• 5V-Input DC-DC Regulators

Ordering Information

PART NUMBER

ISL6431CB

ISL6431IB

ISL6431EVAL1

TEMP. RANGE

(

0 to 70

-40 to 85

PACKAGE

8 Ld SOIC

PKG.

NO.

M8.15

• Low-Voltage Distributed Power Supplies

Pinout

BOOT 1

UGATE 2

GND 3

LGATE 4

8 PHASE

7 COMP/OCSET

6 FB

5 VCC

Evaluation Board

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

1-888-INTERSIL or 321-724-7143

Intersil and Design is a trademark of Intersil Americas Inc.

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