l6733 STMicroelectronics, l6733 Datasheet

l6733

Manufacturer Part Number

l6733

Description

Advanced Modular Synchronous Pwm Controller

Manufacturer

STMicroelectronics

Datasheet

1.L6733.pdf (3 pages)

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Features

■

Applications

■

Table 1.

March 2008

For further information contact your local STMicroelectronics sales office.

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)

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

High-performance DC-DC modules

Redundant power supply with hot-plug

niPoL converters

Order codes

Device summary

L6733TR

L6733

Advanced modular synchronous PWM controller

VFQFPN32

Package

Rev 1

Description

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.

Oscillator is internally fixed to 200 kHz and

adjustable up to 1 MHz.

VFQFPN32 5x5 mm

Tape and reel

Packing

Tube

L6733

Data Brief

www.st.com

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l6733 Summary of contents

Page 1

... 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 ...

Page 2

... Revision history 1 Revision history Table 2. Document revision history Date 07-Mar-2008 2/3 Revision 1 Initial release L6733 Changes ...

Page 3

... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 3/3 Please Read Carefully: © 2008 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com L6733 ...

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