L6716
2/3/4 phase controller with embedded drivers for Intel® VR11.1
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 overvoltage protection
■ Programmable overcurrent protection
■ Programmable overvoltage protection
■ Adjustable switching frequency
■ SS_END and OUTEN signal
■ VFQFPN-48 7x7 mm package with exposed
pad
Applications
■ High current VRM/VRD for desktop / server /
workstation CPUs
■ High density DC/DC converters
VFQFPN-48 - 7 x 7 mm
Description
The device implements a two-to-four phases step-
down 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
overcurrent and under / overvoltage (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 overcurrent, the system works in
constant current mode until UVP.
Table 1.
Device summary
Order codes
L6716
L6716TR
Package
VFQFPN-48
Packing
Tray
Tape and reel
January 2010
Doc ID 14521 Rev 3
1/57
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