L6722 datasheet(1/34 Pages) STMICROELECTRONICS

部件名	L6722

功能描述	3 Phase controller for DC/DC converters

PDF	34 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 34 page

May 2006

Rev 1

1/34

34

L6722

3 Phase controller for DC/DC converters

Features

■ 2A integrated gate drivers

■ 0.8V reference

■ 1% output voltage accuracy

■ Adjustable reference offset

■ Precise current sharing and OCP across LS

MOSFETS

■ Constant over current protection

■ Feedback disconnection

■ LSLESS allows managing pre-bias startup

■ Preliminary of protection

■ Oscillator internally fixed at 100kHz, externally

adjustable

■ Power good

■ Integrated remote sense buffer

■ VFQFPN36 package with exposed pad

Applications

■ Memory supply for server and workstation MBs

■ High density DC / DC converters

■ High current pol

Description

L6722 implements a three-phase step-down

controller with 120º phase-shift between each

phase with integrated high-current drivers in a

compact VFQFPN36 package with exposed pad.

L6722 manages output voltages down to 0.8V

with ±1% output voltage accuracy over line and

temperature variations. Additional programmable

offset can be added to the reference voltage with

a single external resistor in order to perform

margining tests.

The controller assures fast protection against load

over current and over / under voltage. In case of

over-current the system works in Constant

Current mode until UVP. Preliminary OVP allows

full load protection in case of startup with failed

HS. Feedback-disconnection protection prevents

from damaging the load in case of misconnections

in the remote sense. Pre-bias start-up is also

managed thanks to LSLESS.

Combined use of DCR and RdsON current

sensing assures precision in voltage positioning

(by reading droop current across inductors DCR)

and safe current sharing and OCP per each

phase (by reading the current across LS RdsON).

Droop function can be anyway disabled to

perform precise and load-insensitive regulation.

VFQFPN36

www.st.com

Order codes

Part number

Package

Packing

L6722

VFQFPN36

Tube

L6722TR

VFQFPN36

Tape & Reel

类似零件编号 - L6722

制造商	部件名	数据表	功能描述
STMicroelectronics	L6725	533Kb / 27P	Low cost adjustable step-down controller 26-Jun-2006
	L6725	803Kb / 32P	Voltage mode PWM controller with bootstrap anti-discharging system 28-Jun-2007
	L6725A	803Kb / 32P	Voltage mode PWM controller with bootstrap anti-discharging system 28-Jun-2007
	L6725ATR	803Kb / 32P	Voltage mode PWM controller with bootstrap anti-discharging system 28-Jun-2007
	L6725TR	533Kb / 27P	Low cost adjustable step-down controller 26-Jun-2006

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