Synchronous step-down converter for dual step-down converter

Maxim Integrated MAX25255 Synchronous step-down converter is a dual step-down converter with integrated high side and low side switches. Maxim IC provides up to 8A current per channel and input voltage ranges from 3V to 36V.

These devices consume only 12μA static current when unloaded. Voltage quality can be monitored by observing the PGOOD signal. The MAX25255 adjusts the output voltage in the differential pressure region by operating at 99% duty cycle.

Features

● Dual step-down converter
-   Wide input voltage range: 3.0V to 36V (42V, Max)
-   Low power supply current (6.5µA, Max.)
-   Low operating static current, one channel open (12µA, typical value)
-   Programmable VOUT: 0.8V to 14V
-   Up to 8A per channel
-   The two converters operate 180° out of phase
-   Minimum on-off time: 24ns (typical value)

● Double/quadruple phase operation
-   It can operate two ics in parallel to realize four-phase operation
-   ±10% current sharing accuracy
-   Supports up to 16A current in two-phase and 32A current in four-phase

● Diagnostic and redundancy circuit (MAX25255)
-   Meet ASIL B requirements
-   Redundant reference
-   Nude temperature monitor
-   Precision undervoltage and overvoltage protection

● Summary
-   23 pins, 4.50mm x 5.75mm FC2QFN package
-   Ambient operating temperature range: -40°C to +125°C
-   Comply with AEC-Q100 standard
-   Switching frequency options: 200kHz, 400kHz, 1MHz, or 2MHz
-   Spread spectrum

Applications

● Front-end power supply for audio host
● ASIL
● Universal double step-down converter
● Telematics module
● Front camera power supply