L6733 Datasheet, PDF (1/3 Pages) STMicroelectronics – Advanced modular synchronous PWM controller

L6733
Advanced modular synchronous PWM controller
Data Brief
Features
■ High current embedded drivers with
programmable supply voltage
■ Operative supply voltage range: 4.5 V to 16 V
with selectable UVLO threshold
■ Adjustable output voltage: 0.6 V reference
■ 0.8 % accuracy over line ant temperature
variations (0 °C to 125 °C)
VFQFPN32 5x5 mm
Description
■ External reference tracking
■ Integrated remote sense amplifier
■ Current sharing bus control
■ DCM to optimize efficiency at light-load
■ Hot-plug control capability
■ Margin mode and synchronization
■ Pre-bias start-up management
■ Thermal shut-down
■ Over current protection thermal compensation
■ Programmable over/under voltage protection
■ FB disconnection protection
■ Power good output
■ Programmable oscillator: 200 kHz to 1 MHz
■ VFQFPN32 package; 5x5 mm
Applications
■ High-performance DC-DC modules
■ Redundant power supply with hot-plug
■ niPoL converters
L6733 is a single-phase PWM controller designed
to drive N-channel power MOSFETs in a
synhronous rectified buck topology also providing
DCM operations to optimize efficiency in light-
load conditions.
The device is specifically designed to implement
redundant and parallelable DC-DC converters.
Current-sharing bus control and OR-Ing fet
driving circuitry are embedded featuring proper
protection management. Synchronization is also
available helping further in reducing input
capacitance in paralleled converters.
Programmable margin mode control through
single pin allow saving external logic.
L6733 provides an integrated 0.6 V reference
allowing regulating output voltages with ±0.8 %
accuracy over line and temperature variations
(0 °C to 125 °C) recovering connector and PCB
losses through the remote amplifier provided.
Programmable dual level over current protection
as well as over and under voltage protection are
provided. Current information is monitored across
the main inductor DCR saving the use of
expensive and space-consuming sense resistors.
Table 1. Device summary
Oscillator is internally fixed to 200 kHz and
adjustable up to 1 MHz.
Order codes
Package
Packing
L6733
L6733TR
VFQFPN32
Tube
Tape and reel
March 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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