MP9186 – 20V, 6A SYNCHRONOUS STEP-DOWN CONVERTER

MP9186 Rev. 1.0

www.MonolithicPower.com

11

2/4/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

Startup and Shutdown

If both VIN and EN exceed their respective

thresholds, the chip is enabled. The reference

block starts first, generating a stable reference

voltage and currents, and then the internal

regulator is enabled. The regulator provides a

stable supply for the remaining circuitries.

Three events can shut down the chip: EN low,

VIN low and thermal shutdown. In shutdown, the

signaling path is first blocked to avoid any fault

triggering. The COMP voltage and the internal

supply rail are then pulled down. The floating

driver is not subject to this shutdown command.