L6713A Datasheet, PDF (1/64 Pages) Holtek Semiconductor Inc – 2/3 Phase controller with embedded drivers for Intel VR10, VR11 and AMD 6 bit CPUs

L6713A
2/3 phase controller with embedded drivers for Intel VR10, VR11
and AMD 6 bit CPUs
Features
■ Load transient boost LTB Technology™ to
minimize the number of output capacitors
(patent pending)
■ Dual-edge asynchronous PWM
■ Selectable 2 or 3 phase operation
■ 0.5 % output voltage accuracy
■ 7/8 bit programmable output up to 1.60000 V -
Intel VR10.x, VR11 DAC
■ 6 bit programmable output up to 1.5500 V -
AMD 6 bit DAC
■ High current integrated gate drivers
■ Full differential current sensing across inductor
■ Embedded VRD thermal monitor
■ Differential remote voltage sensing
■ Dynamic VID management
■ Adjustable voltage offset
■ Low-side-less startup
■ Programmable soft-start
■ Programmable over voltage protection
■ Preliminary over voltage protection
■ Programmable over current protection
■ Adjustable switching frequency
■ Output enable
■ SS_END / PGOOD signal
■ TQFP64 10x10 mm package with exposed pad
Applications
■ High current VRD for desktop CPUs
■ Workstation and server CPU power supply
■ VRM modules
Table 1. Device summary
TQFP64 (Exposed pad)
Description
L6713A implements a two/three phase step-down
controller with 180º/120º phase-shift between
each phase with integrated high current drivers in
a compact 10x10 mm body package with exposed
pad.The 2 or 3 phase operation can be easily
selected through PHASE_SEL pin.
Load transient boost LTB Technology™ (patent
pending) reduces system cost by providing the
fastest response to load transition therefore
requiring less bulk and ceramic output capacitors
to satisfy load transient requirements.
LTB Technology™ can be disabled and in this
condition the device works as a dual-edge
asynchronous PWM.
The device embeds selectable DACs: the output
voltage ranges up to 1.60000 V (both Intel VR10.x
and VR11 DAC) or up to 1.5500 V (AMD 6BIT
DAC) 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). In case of over-current
the device turns off all MOSFET and latches the
condition.
System thermal monitor is also provided allowing
system protection from over-temperature
conditions.
Order codes
Package
Packaging
L6713A
L6713ATR
TQFP64 (Exposed pad)
Tube
Tape and reel
August 2008
Rev 3
1/64
www.st.com
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