ISL8500 查看數據表（PDF） - Renesas Electronics

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ISL8500

2A Standard Buck PWM Regulator

Renesas Electronics 

ISL8500

2A Standard Buck PWM Regulator

The ISL8500 is a high-performance, simple output controller

that provides a single, high frequency power solution for a

variety of point-of-load applications. The ISL8500 integrates

a 2A standard buck PWM controller and switching MOSFET.

The PWM controller in the ISL8500 drives an internal

switching N-Channel power MOSFET and requires an

external Schottky diode to generate an output voltage from

0.6V to 19V. The integrated power switch is optimized for

excellent thermal performance up to 2A of output current.

The standard buck input voltage range supports a fixed 5V

or variable 5.5V to 25V range. The PWM regulator switches

at a fixed frequency of 500kHz and utilizes simple voltage

mode control with input voltage feed forward to provide

flexibility in component selection and minimize solution size.

Protection features include overcurrent, undervoltage and

thermal overload protection integrated into the IC. The

ISL8500 power good signal output indicates loss of

regulation on the PWM output.

ISL8500 is available in a small 4mmx3mm Dual Flat No-Lead

(DFN) package.

Ordering Information

PART

NUMBER

(Note)

PART

TEMP.

PACKAGE PKG.

MARKING RANGE (°C) (Pb-free) DWG. #

ISL8500IRZ 500Z

-40 to +85 12 Ld DFN L12.4x3

ISL8500IRZ-T* 500Z

-40 to +85 12 Ld DFN L12.4x3

*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.

DATASHEET

FN6611

Rev 0.00

December 10, 2007

Features

• Standard Buck Controller with Integrated Switching Power

MOSFET

• Integrated Boot Diode

• Input Voltage Range

- Fixed 5V ±10%

- Variable 5.5V to 25V

• PWM Output Voltage Adjustable from 0.6V to 19V with

Continuous Output Current up to 2A

• ±1% VFB Tolerance

• Voltage Mode Control with Voltage Feed Forward

• Fixed 500kHz Switching Frequency

• Externally Adjustable Soft-Start Time

• Output Undervoltage Protection

• Enable Inputs

• PGOOD Output

• Overcurrent Protection

• Thermal Overload Protection

• Internal 5V LDO regulator

Applications

• General Purpose

• WLAN Cards-PCMCIA, Cardbus32, MiniPCI Cards-Compact

Flash Cards

• Hand-Held Instruments

• LCD Panel

• Set-top Box

Pinout

ISL8500

(12 LD DFN)

TOP VIEW

FB 1

COMP 2

SS 3

EN 4

PG 5

GND 6

DFN 4x3

GND

12 VIN

11 VIN

10 PHASE

9 PHASE

8 BOOT

7 VDD

FN6611 Rev 0.00

December 10, 2007

Page 1 of 15

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