Product Summary

The PM6686 is a dual step-down cotroller with adjustable voltages, adjustable LDO and auxiliary charge pump controller for notebook. It is specifically designed to provide extremely high efficiency conversion, with lossless current sensing technique. The constant on-time architecture assures fast load transient response and the embedded voltage feed-forward provides nearly constant switching frequency operation. Pulse skipping technique increases efficiency at very light load. Its applications include Notebook computers, Main (3.3 V/5 V), chipset (1.5 V/1.05 V), DDR1/2/3, graphic cards power supply, PDAs, mobile devices, tablet PC or slates, 3-4 cells Li+ battery powered devices.

Parametrics

PM6686 absolute maximum ratings: (1)VIN to PGND: -0.3 to 38V; (2)phase to pgnd: -0.3 to 38V; (3)PVCC to PGND: -0.3 to 6V; (4)power dissipation: 2W; (5)maximum withstanding voltage range: ±1250V.

Features

PM6686 features: (1)Frequency selectable; (2)Soft-start internally fixed at 2 ms and soft-stop; (3)Selectable pulse skipping at light loads; (4)Selectable minimum frequency (33 kHz) in pulse skip mode; (5)Independent Power Good and EN signals; (6)Latched OVP and UVP; (7)Charge pump feedback.

Diagrams

PM6686 block diagram

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