ISL62381 Datasheet, PDF (1/23 Pages) Intersil Corporation – High-Efficiency, Quad or Triple-Output System Power Supply Controller for Notebook Computers

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Data Sheet
ISL62381, ISL62382, ISL62383
August 7, 2008
FN6665.4
High-Efficiency, Quad or Triple-Output
System Power Supply Controller for
Notebook Computers
The ISL62381, ISL62382, ISL62383 family of controllers
generate supply voltages for battery-powered systems. The
ISL62381 and ISL62382 include two pulse-width modulation
(PWM) controllers, adjustable from 0.6V to 5.5V, and two
linear regulators, LDO5 and LDO3, that generate a fixed 5V
and an adjustable output respectively, and each can deliver
up to 100mA. The ISL62383 has the same outputs as the
ISL62381 and ISL62382, but without LDO3 linear regulator.
The channel 2 switching regulator will automatically take
over the LDO5 load when programmed to 5V output. This
provides a large power savings and boosts efficiency. The
ISL62381, ISL62382, ISL62383 family include on-board
power-up sequencing, two power-good (PGOOD) outputs,
digital soft-start, and internal soft-stop output discharge that
prevent 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
approximately 28kHz.
The ISL62381, ISL62382, is available in 32 Ld 5x5 TQFN
package, and ISL62383 is available in 28 Ld 4x4 TQFN
package. ISL62381, ISL62382, ISL62383 family can operate
over the extended temperature range (-10°C to +100°C).
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP
RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL62381HRTZ* 62381 HRTZ -10 to +100 32 Ld 5x5 TQFN L32.5x5A
ISL62382HRTZ* 62382 HRTZ -10 to +100 32 Ld 5x5 TQFN L32.5x5A
ISL62383HRTZ* 623 83HRTZ -10 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.
Features
• High Performance R³ Technology
• Fast Transient Response
• ±1% Output Voltage Accuracy: -10°C to +100°C
• Two Fully Programmable Switch-Mode Power Supplies
with Independent Operation
• Programmable Switching Frequency
• Integrated MOSFET Drivers and Bootstrap Diode
• Adjustable (+1.2V to +5V) LDO Output
• Fixed +5V LDO Output with Automatic Switchover to
SMPS2
• 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
• Fault Identification by PGOOD Pull-Down Resistance
• 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
• General Purpose Switching Buck Regulators
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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