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PM6692：Two phase controller for Intel MVP7 GPU and CPU power supply

The PM6692 is a two phase step-down switching controller with embedded gate drivers. It has been designed to supply the CPU and GPU of the Intel® mobile platform, according with INTEL MVP7 specifications.

The controller is based on clocked constant on-time (CkCOT) architecture that allows nearly constant switching frequency over load.

The controller ensures 180° phase shift PWM operation when all the 2 phases are enabled.

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. 1NTC 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 PM6692 a very flexible and cost-effective solution for IMVP7 CPU power supply.

Key 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 RSENSE
• CkCOT (clocked constant on time control loop) allows almost fixed pwm switching frequency
• Output voltage ripple compensation
• Phase overlap in load transient
• Tunable overshoot threshold (TOT) allows to reduce overshoot in load transient
• Skip mode and dual low side gate allows to increase efficiency at light load
• Average OCP for all phases and cycle by cycle OCP for each phase
• Embedded gate drivers and bootstrap diodes
• Adjustable VID transitions feature

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