ISL6729 Datasheet, PDF (1/8 Pages) Intersil Corporation – Low-Cost Single-Ended Current-Mode PWM for Microcontroller Based Power Converters

®
Data Sheet
July 2004
ISL6729
FN9152.1
Low-Cost Single-Ended Current-Mode
PWM for Microcontroller Based Power
Converters
The ISL6729 pulse width modulating (PWM) current mode
controller is designed for power conversion applications that
are based on a microcontroller or other device which can
generate a digital clock signal at the desired switching
frequency. Similar to the ISL684x family of products, the
ISL6729 provides the basic current mode PWM control
features, but eliminates the error amplifier, the oscillator, and
the reference. An external clock signal applied to the
oscillator input provides the time base and sets the
maximum duty cycle. The reduced feature set is ideal for
those applications where a microcontroller is available to
provide the monitor and control functions. The analog PWM
provides the cycle by cycle peak current mode control,
leaving the monitor and control overhead to the
microcontroller.
Ordering Information
PART NUMBER
ISL6729IB
ISL6729IBZ
(See Note)
ISL6729IU
ISL6729IUZ
(See Note)
TEMP. RANGE
(°C)
PACKAGE
-40 to 105 8 Ld SOIC
-40 to 105 8 Ld SOIC
(Pb-free)
-40 to 105 8 Ld MSOP
-40 to 105 8 Ld MSOP
(Pb-free)
PKG.
DWG. #
M8.15
M8.15
M8.118
M8.118
Add -T to part number for Tape and Reel packaging.
NOTE: Intersil Pb-free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is 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-020B.
PART NUMBER
ISL6729
RISING UVLO
4.75V
MAX. DUTY CYCLE
100%
Features
• 5V Operation
• 1A MOSFET gate driver
• 400µA startup current
• 30ns propagation delay current sense to output
• Fast transient response with peak current mode control
• Switching frequency to 2MHz
• 20ns rise and fall times with 1nF output load
• Maximum Duty Cycle Determined by Clock Input Duty
Cycle
• Tight tolerance current limit threshold
• Pb-free available
Applications
• Telecom and Datacom Power
• Wireless Base Station Power
• File Server Power
• Industrial Power Systems
• PC Power Supplies
• Isolated Buck and Flyback Regulators
• Boost Regulators
Pinout
ISL6729 (8-PIN SOIC, MSOP)
TOP VIEW
COMP 1
N/C 2
CS 3
CLKS 4
8 N/C
7 VDD
6 OUT
5 GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004 All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.