PM6691
Single phase controller for Intel MVP7 GPU and CPU power supply
Data brief
Features
■ 4.5 V to 28 V input voltage range
■ 0.25 V to 1.52 V output voltage range, 8 bit
SVID
■ IMVP7 spec compliant
■ Selectable PWM switching frequency,
maximum temperature, maximum currents,
boot voltage, VID transitions slew rate slow
■ Adjustable load line (LL), 1 NTC needed for LL
thermal compensation
■ Lossless current sense with inductor DCR or
accurate inductor current sense with R
■
CkCOT (clocked constant on time control loop)
SENSE
allows almost fixed pwm switching frequency
■ Output voltage ripple compensation
■ Tunable overshoot threshold (TOT) allows to
reduce overshoot in load transient
■ Skip mode allows to increase efficiency at light
load
■ Average and cycle by cycle OCP for each
phase
■ Embedded gate drivers and bootstrap diodes
■ Adjustable VID transitions feature
Applications
■ Intel
Table 1. Device summary
®
mobile CPU and GPU core IMVP7
Order codes Package Packaging
PM6691
PM6691TR Tape and reel
QFN28 - 4x4
(exposed pad)
Tr ay
Description
The PM6691 is a single phase step-down
switching controller with embedded gate drivers. It
has been designed to supply the CPU and GPU
of the Intel
INTEL MVP7 specifications.
The controller is based on clocked constant ontime (CkCOT) architecture that allows nearly
constant switching frequency over load.
An embedded integrator control loop
compensates the DC voltage error due to the
output voltage ripple. Load line of the output
voltage can be adjusted by setting a resistor
divider and it can be thermally compensated by
using 1 NTC.
Current monitor IMON provides an analog output
current proportional to the CPU load current. One
NTC can be used to sense the maximum
temperature of the switching regulator and
provide the temperature information to the CPU
through SVID bus.
Adjustable VID transitions feature, TOT feature,
extremely low shutdown and quiescent current
make the PM6691 a very flexible and costeffective solution for IMVP7 CPU power supply.
®
mobile platform, according with
QFN28 - 4x4
(exposed pad)
March 2011 Doc ID 018639 Rev 1 1/3
For further information contact your local STMicroelectronics sales office.
www.st.com
3
Revision history PM6691
Revision history
Table 2. Document revision history
Date Revision Changes
24-Mar-2011 1 Initial release
2/3 Doc ID 018639 Rev 1
PM6691
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Doc ID 018639 Rev 1 3/3
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