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ISL62391CHRTZ

High-Efficiency, Triple-Output System Power Supply Controller for Notebook Computers

Renesas Electronics 

DATASHEET

ISL62391, ISL62392, ISL62391C, ISL62392C

High-Efficiency, Triple-Output System Power Supply Controller for Notebook

Computers

FN6666

Rev 8.00

August 25, 2015

The ISL62391, ISL62392, ISL62391C and ISL62392C

controller generate supply voltages for battery-powered

systems. It includes two pulse-width modulation (PWM)

controllers, adjustable from 0.6V to 5.5V, and a linear

regulator (LDO3) that generates a fixed 3.3V and can deliver

up to 100mA. The ISL62391, ISL62392, ISL62391C and

ISL62392C include on-board power-up sequencing, a

power-good (PGOOD) output, digital soft-start, and internal

soft-stop output discharge that prevents negative voltages on

shutdown.

The patented R3 PWM control scheme provides a low jitter

system with fast response to load transients. Light-load

efficiency is improved with period-stretching discontinuous

conduction mode (DCM) operation. To eliminate noise in audio

frequency applications, an ultrasonic DCM mode is included,

which limits the minimum switching frequency to 28kHz.

The ISL62391, ISL62391C and ISL62392, ISL62392C are

identical except for how their overvoltage protection is

handled. The ISL62391 and ISL62391C utilize a tri-state

overvoltage scheme, whereas the ISL62392 and ISL62392C

employ a soft-crowbar method.

The ISL62391, ISL62392, ISL62391C and ISL62392C are

available in a 28 Ld 4x4 TQFN package and operate over

the extended temperature range (-40°C to +100°C).

Features

• High Performance R3 Technology

• Fast Transient Response

• ±1% Output Voltage Accuracy

• 2 Fully Programmable Switch-Mode Power Supplies

• Programmable Switching Frequency

• Fixed 3.3V LDO Output

• Internal Soft-Start and Soft-Stop Output Discharge

• Wide Input Voltage Range: 5.5V to 25V

• Full and Ultrasonic Pulse-Skipping Mode

• Power-Good Indicator

• Overvoltage, Undervoltage and Overcurrent Protection

• Thermal Monitor and Protection

• Pb-Free (RoHS Compliant)

Applications

• Notebook and Sub-Notebook Computers

• PDAs and Mobile Communication Devices

• 3-Cell and 4-Cell Li+ Battery-Powered Devices

Pinout

ISL62391, ISL62392, ISL62391C, ISL62392C

(28 LD 4X4 TQFN)

TOP VIEW

28 27 26 25 24 23 22

PGOOD 1

21 BOOT2

FSET2 2

20 LGATE2

FCCM 3

19 PGND

VCC 4

18 PVCC

LDO3EN 5

17 VIN

FSET1 6

FB1 7

CENTER PAD:

GND

16 LDO3

15 LGATE1

8 9 10 11 12 13 14

FN6666 Rev 8.00

August 25, 2015

Page 1 of 22

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