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L6716
2/3/4 phase controller with embedded drivers for Intel VR11.1
Data Brief
Features

Load transient boost LTB TechnologyTM to minimize the number of output capacitors 2 or 3-phase operation with internal driver 4-phase operation with external PWM driver signal PSI input with programmable strategy Imon output 0.5 % output voltage accuracy 8 bit programmable output up to 1.60000 V Intel VR11.1 DAC - backward compatible with VR10/VR11 Full differential current sense across inductor Differential remote voltage sensing Adjustable voltage offset LSLess startup to manage pre-biased output Feedback disconnection protection Preliminary over voltage protection Programmable over current protection Programmable over voltage pretection Adjustable switching frequency SS_END and OUTEN signal VFQFPN48 7 mm x 7 mm package with exposed pad VFQFPN48 7 mm x 7 mm (exposed pad)
Description
The device implements a two-to-four phases stepdown controller with three integrated high current drivers in a compact 7x7 mm body package with exposed pad. Load transient boost LTB TechnologyTM reduces system cost by providing the fastest response to load transition therefore requiring less bulk and ceramic output capacitors to satisfy load transient requirements. The device embeds VR11.x DACs: the output voltage ranges up to 1.60000 V managing D-VID with 0.5 % output voltage accuracy over line and temperature variations. The controller assures fast protection against load over current and under / over voltage (in this last case also before UVLO). Feedback disconnection prevents from damaging the load in case of disconnections in the system board. In case of over-current, the system works in constant current mode until UVP.

Applications

High current VRM/VRD for desktop / server / workstation CPUs High density DC-DC converters Device summary
Order codes L6716
Table 1.
Package VFQFPN48 7 mm x 7 mm
Packaging Tube Tape and reel
L6716TR
May 2008
Rev 1
1/3
www.st.com 3
For further information contact your local STMicroelectronics sales office.
Revision history
L6716
1
Revision history
Table 2.
Date 2-May-2008
Document revision history
Revision 1 Initial release Changes
2/3
L6716
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