Step Down Controller 32-Pin VFQFPN T/R

PM6680A is a dual step-down controller specifically designed to provide extremely high efficiency conversion, with losses 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. An embedded integrator control loop compensates the DC voltage error due to the output ripple. Pulse skipping technique increases efficiency at very light load. Moreover a minimum switching frequency of 33kHz is selectable to avoid audio noise issues. The PM6680A provides a selectable switching frequency, allowing three different values of switching frequencies for the two operation of the two switching sections. The output voltages OUT1 and OUT2 can be adjusted from 0.9V to 5V and from 0.9V to 3.3V respectively.

6V to 36V input voltage range

Adjustable output voltages

5V LDO delivers 100mA peak current

1.237V ±1% reference voltage available externally

Current sensing using low side MOSFETs R_DS(on)

Valley current sensing

Soft-start internally fixed at 2ms

Soft output discharge

Latched OVP and UVP

Selectable pulse skipping at light loads

Selectable minimum frequency (33kHz) in pulse skip mode

5mW maximum quiescent power

Independent power good signals

Output voltage ripple compensation

Thermal shutdown