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L6722

STMicroelectronics
Part Number L6722
Manufacturer STMicroelectronics
Description 3 Phase controller
Published Mar 19, 2009
Detailed Description www.DataSheet4U.com L6722 3 Phase controller for DC/DC converters Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 2A integrated gat...
Datasheet PDF File L6722 PDF File

L6722
L6722

Overview
www.
DataSheet4U.
com 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 VFQFPN36 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.
Applications ■ ■ ■ Memory supply for server and workstation MBs High density DC / DC converters High current pol Order codes Part number Package VFQFPN36 VFQFPN36 Rev 1 Packing Tube Tape & Reel 1/34 www.
st.
com 34 L6722 L6722TR May 2006 L6722 www.
DataSheet4U.
com Contents Typical application circuit and blo...


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