L6728AH datasheet(1/33 Pages) STMICROELECTRONICS

номер детали	L6728AH

подробное описание детали	High frequency single phase PWM controller with Power Good

PDF	33 Pages

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производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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1 / 33 page

May 2009

Doc ID 15726 Rev 1

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33

L6728AH

High frequency single phase PWM controller with Power Good

Features

■ Flexible power supply from 5 V to 12 V

■ Power conversion input as low as 1.5 V

■ 0.8 V internal reference

■ 0.8% output voltage accuracy

■ High-current integrated drivers

■ Power Good output

■ Sensorless and programmable OCP across

low-side RDS(on)

■ OV / UV protections

■ VSEN disconnection protection

■ Oscillator internally fixed at 600 kHz

■ LS-LESS to manage pre-bias start-up

■ Adjustable output voltage

■ Disable function

■ Internal soft-start

■ VFDFPN 10 package

Applications

■ Memory and termination supply

■ Subsystem power supply (MCH, IOCH, PCI)

■ CPU and DSP power supply

■ Distributed power supply

■ General DC / DC converters

Description

L6728AH is a single-phase step-down controller

with integrated high-current drivers that provides

complete control logic and protection to realize in

a simple way general DC-DC converters by using

a compact VFDFPN 10 package.

Device flexibility allows managing conversions

with power input VIN as low as 1.5 V and device

supply voltage ranging from 5 V to 12 V.

L6728AH provides simple control loop with

voltage mode EA. The integrated 0.8 V reference

allows regulating output voltages with ±0.8%

accuracy over line and temperature variations.

Oscillator is internally fixed to 600 kHz.

L6728AH provides programmable dual level over

current protection as well as over and under

voltage protection. Current information is

monitored across the low-side MOSFET RDS(on)

saving the use of expensive and space-

consuming sense resistors.

PGOOD output easily provides real-time

information on output voltage status, through

VSEN dedicated output monitor.

VFQFPN 10

Table 1.

Device summary

Order codes

Package

Packing

L6728AH

VFDFPN 10

Tube

L6728AHTR

Tape and reel

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Аналогичный номер детали - L6728AH

производитель	номер детали	датащи	подробное описание детали
STMicroelectronics	L6728A	1Mb / 32P	High frequency single phase PWM controller with Power Good 01-Oct-2008
STMicroelectronics	L6728ATR	1Mb / 32P	High frequency single phase PWM controller with Power Good 01-Oct-2008

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Аналогичное описание - L6728AH

производитель	номер детали	датащи	подробное описание детали
STMicroelectronics	L6726A	436Kb / 24P	Single phase PWM controller 26-Oct-2006
International Rectifier	IR3629	586Kb / 23P	HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER WITH POWER GOOD OUTPUT
STMicroelectronics	L6728	1Mb / 32P	Single phase PWM controller with PowerGOOD 17-Sep-2007
	L6726A	464Kb / 24P	Single phase PWM controller 30-Jul-2007
	L6728_0706	1Mb / 31P	Single phase PWM controller with Power Good 05-Jun-2008
	L6728A	1Mb / 32P	High frequency single phase PWM controller with Power Good 01-Oct-2008
Microsemi Corporation	NX2305	579Kb / 19P	SINGLE SUPPLY 12V SYNCHRONOUS PWM CONTROLLER WITH NMOS LDO CONTROLLER, POWER GOOD & ENABLES
STMicroelectronics	L6726A	992Kb / 35P	Single phase PWM controller 23-Mar-2010
	L6728D	1Mb / 33P	Single-phase PWM controller with Power Good 03-Feb-2010
	L6728H	1Mb / 32P	Single phase PWM controller with Power Good 20-May-2009

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