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ISL85001

1A Standard Buck PWM Regulator

Renesas Electronics 

ISL85001

1A Standard Buck PWM Regulator

The ISL85001 is a high-performance, simple output controller

that provides a single, high frequency power solution for a

variety of point-of-load applications. The ISL85001 integrates a

1A standard buck PWM controller and switching MOSFET.

The PWM controller in the ISL85001 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 for up to 1A 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 ISL85001

power-good signal output indicates loss of regulation on the

PWM output.

ISL85001 is available in a small 4mmx3mm Dual Flat No-Lead

(DFN) package.

Related Literature

• For a full list of related documents, visit our website

- ISL85001 product page

FN6769

Rev.3.00

Apr 14, 2017

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 1A

• ±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

• Pb-free (RoHS compliant)

Applications

• General purpose

• WLAN Cards-PCMCIA, Cardbus32, MiniPCI cards-compact flash

cards

• Hand-held instruments

• LCD panel

• Set-top box

FN6769 Rev.3.00

Apr 14, 2017

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