L6733TR STMICROELECTRONICS [STMicroelectronics], L6733TR Datasheet

L6733TR

Manufacturer Part Number

L6733TR

Description

Advanced modular synchronous PWM controller

Manufacturer

STMICROELECTRONICS [STMicroelectronics]

Datasheet

1.L6733TR.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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L6733TR Summary of contents

Page 1

... Redundant power supply with hot-plug ■ niPoL converters Table 1. Device summary Order codes L6733 L6733TR March 2008 For further information contact your local STMicroelectronics sales office. VFQFPN32 5x5 mm 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 ...

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

Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any ...

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