ISL62391 Datasheet, PDF (1/20 Pages) Intersil Corporation – High-Efficiency, Triple-Output System Power Supply Controller for Notebook Computers

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Data Sheet
ISL62391, ISL62392
December 22, 2008
FN6666.4
High-Efficiency, Triple-Output System
Power Supply Controller for Notebook
Computers
The ISL62391, ISL62392 controller generates 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 includes
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 and ISL62392 are identical except for how
their overvoltage protection is handled. The ISL62391
utilizes a tri-state overvoltage scheme, whereas the
ISL62392 employs a soft-crowbar method.
The ISL62391, ISL62392 is available in a 28 Ld 4x4 TQFN
package and operates over the extended temperature range
(-40°C to +100°C).
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP
RANGE
(°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL62391HRTZ 623 91HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4
ISL62391HRTZ-T* 623 91HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4
ISL62392HRTZ 623 92HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4
ISL62392HRTZ-T* 623 92HRTZ -10 to +100 28 Ld 4x4 TQFN L28.4x4
ISL62391IRTZ 623 91IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4
ISL62391IRTZ-T* 623 91IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4
ISL62392IRTZ 623 92IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4
ISL62392IRTZ-T* 623 92IRTZ -40 to +100 28 Ld 4x4 TQFN L28.4x4
*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.
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
(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
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2008. All Rights Reserved
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