1

FN6666.5

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

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Copyright Intersil Americas Inc. 2008, 2011. All Rights Reserved

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

ISL62391, ISL62392, ISL62391C, ISL62392C

High-Efficiency, Triple-Output System

Power Supply Controller for Notebook

Computers

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.

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

• 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

Ordering Information

PART

NUMBER

(Note)

PART

MARKING

TEMP

RANGE (°C)

PACKAGE

(Pb-Free)

PKG.

DWG. #

ISL62391HRTZ*

623 91HRTZ

-10 to +100

28 Ld 4x4 TQFN

L28.4x4

ISL62392HRTZ*

623 92HRTZ

-10 to +100

28 Ld 4x4 TQFN

L28.4x4

ISL62391CHRTZ*

62391C HRTZ

-10 to +100

28 Ld 4x4 TQFN

L28.4x4

ISL62392CHRTZ*

62392C HRTZ

-10 to +100

28 Ld 4x4 TQFN

L28.4x4

ISL62391IRTZ*

623 91IRTZ

-40 to +100

28 Ld 4x4 TQFN

L28.4x4

ISL62392IRTZ*

623 92IRTZ

-40 to +100

28 Ld 4x4 TQFN

L28.4x4

ISL62391CIRTZ*

62391C IRTZ

-40 to +100

28 Ld 4x4 TQFN

L28.4x4

ISL62392CIRTZ*

62392C IRTZ

-40 to +100

28 Ld 4x4 TQFN

L28.4x4

*Add “-T*” suffix for tape and reel. 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.

PGOOD

FSET2

FCCM

VCC

LDO3EN

FSET1

FB1

BOOT2

LGATE2

PGND

PVCC

VIN

LDO3

LGATE1

1

2

3

4

5

6

7

21

20

19

18

17

16

15

28

27

26

25

24

23

22

8

9

10

11

12

13

14

CENTER PAD:

GND

Data Sheet

April 7, 2011