L6716

L6716 2/3/4 phase controller with embedded drivers for Intel VR11.1 Data Brief Features ■ ■ ■ ■ ■ ■ ■ Load transient boost LTB Technology™ 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 Technology™ 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 Please Read Carefully: 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 time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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