MAX25255AFDA/VY+

The MAX25254/MAX25255 are small, synchronous dual buck converters with integrated high-side and low-side switches. The ICs are designed to deliver up to 8A per channel with input voltages from 3V to 36V while using only 12μA quiescent current at no load. Voltage quality can be monitored by observing the PGOOD signals. The MAX25254/MAX25255 can regulate the output voltage in the dropout region by running at 99% of the duty cycle, making them ideal for automotive and industrial applications. The MAX25254/MAX25255 offer fixed and adjustable output voltage options. Four fixed frequency options allow for small external components and reduced output ripple, and also guarantee no AM interference. The MAX25254/MAX25255 can enter skip mode at light loads with ultra-low quiescent current of 12μA at no load. The MAX25254/MAX25255 can be ordered with spread spectrum enabled for optimum EMI performance. Two buck converters within the MAX25254D and MAX25255D can be configured for dual-phase operation with up to 16A output load capability. Furthermore, the MAX25254D/MAX25255D and the MAX25254Q can be used in parallel to provide quad-phase operation that supports up to 32A (max) output current. The MAX25254/MAX25255 features the MAXQ power architecture, which provides precision transient performance and phase margin. This allows obtaining maximum power, performance, and precision while minimizing system cost for any specific application. The MAX25254/MAX25255 are available in a small, 4.50mm x 5.75mm, 23-pin FC2QFN package and use very few external components.

Applications

• Front-End Power Supply for Head Units
• ASIL Applications
• General-Purpose Dual Buck Converters
• Telematics Modules Front Camera Power

Key features

• Dual Buck Converter
• Wide Input Range from 3.0V to 36V (42V, max)
• Low Shutdown Supply Current (6.5μA, max)
• Low Operating Quiescent Current with One Channel ON (12μA, typ)
• Programmable VOUT from 0.8V to 14V
• Up to 8A per Channel
• 180° Out-of-Phase Operation between Two Converters
• 24ns (typ) Minimum On-Time
• MAXQ Power Architecture
• Dual/Quad-Phase Operation
• Ability to Operate Two ICs in Parallel for Quad-Phase Operation
• ±10% Current Sharing Accuracy
• Supports up to 16A in Dual-Phase and 32A in Quad-Phase
• Diagnostics and Redundant Circuits (MAX25255)
• ASIL B Compliant
• Redundant Reference
• Die Temperature Monitor
• Precision Overvoltage and Undervoltage Protection
• General
• 23-Pin, 4.50mm×5.75mm FC2QFN Package
• -40°C to +125°C Operating Ambient Temperature
• AEC-Q100 Rating
• 200kHz, 400kHz, 1MHz, or 2MHz Switching Frequency Options
• Spread Spectrum