General Description
The MAX16903 is a small, synchronous buck converter with integrated high-side and low-side switches. The device is designed to deliver 1A with input voltages from +3.5V to +28V, while using only 25μA quiescent current at no load. Voltage quality can be monitored by observing the PGOOD signal. The MAX16903 can operate in dropout by running at 97% duty cycle, making it ideal for automotive and industrial applications.

Benefits and Features
● Meets Stringent Automotive Quality and Reliability Requirements
    • +3.5V to +28V Input Voltage Range Allows Operation in “Cold Crank” Conditions
    • Tolerates Input-Voltage Transients to +42V
    • Enable-Pin Compatible from +3.3V Logic Level to +42V
    • 1A Minimum Output Current with Overcurrent Protection
    • -40°C to +125°C Automotive Temperature Range
    • AEC-Q100 Qualified
● Increased Efficiency and Reduced BOM Cost and Board Space
    • Integrated High- and Low-Side FETs
    • Fixed Output Voltages (see the Selector Guide and Contact the Factory for All Available Trimmed Output-Voltage Options)
    • 10-Pin TDFN-EP or 16-Pin TSSOP-EP Packages
● Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements
    • 25μA Quiescent Current During Skip Mode Operation
● High Switching Frequency Allows Use of Small, Low-Cost External Components
    • 2.1MHz Switching Frequency with Three Modes of Operation
    • Skip Mode for Efficient, Low-Power Operation
    • Forced Fixed-Frequency Operation
    • External Frequency Synchronization
● Reduced EMI Emissions at the Switching Frequency
    • Optional Spread-Spectrum Frequency Modulation

Applications
● Automotive
● Industrial
● High-Voltage Input-Power DC-DC Applications