L6726A

Device description

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Device description

L6726A is a single-phase PWM controller with embedded high-current drivers that provides

complete control logic and protections to realize in an easy and simple way a general DC-

DC step-down converter. Designed to drive N-channel MOSFETs in a synchronous buck

topology, with its high level of integration this 8-pin device allows reducing cost and size of

the power supply solution.

L6726A is designed to operate from a 5V or 12V supply bus. Thanks to the high precision

0.8V internal reference, the output voltage can be precisely regulated to as low as 0.8V with

±1% accuracy over line and temperature variations. The switching frequency is internally set

to 270kHz.

This device provides a simple control loop with externally compensated transconductance

error-amplifier and programmable soft start. Low-Side-Less feature allows the device to

perform soft-start over pre-charged output avoiding negative spikes at the load side.

In order to avoid load damages, L6726A provides programmable threshold over current

expensive and space-consuming sense resistor. L6726A also features FB disconnection

protection, preventing dangerous uncontrolled output voltages in case of floating FB pin.