Wide-VIN 2.2MHz dual-phase boost controller with VOUT tracking

The LM5125A-Q1 is

a stackable, dual-phase,

synchronous boost controller. The

device provides a regulated output voltage for lower or equal input voltage also supporting

VI to VOUT bypass mode to save power. Stack two devices with or without

external clock.

Dynamically program VOUT using

the analog or digital ATRK/DTRK function. VI is supported down to 2.5V after start-up as the

internal VCC supply is automatically switched from VBIAS to VOUT for

VBIAS < 4.5V. The fixed switching frequency is set between 100kHz and 2.2MHz

through a resistor on the RT pin or the SYNCIN clock. The switching modes FPWM or diode

emulation can be changed during operation.

The implemented protections peak current

limit, average input current limit, average inductor current monitor, over and undervoltage

protection, and the thermal shutdown protect the device and the application.