MAX17551AUB+T

The MAX17551 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4V to 60V input. The converter can deliver up to 50mA and generates output voltages from 0.8V up to 0.9×VIN. The feedback (FB) voltage is accurate to within ±1.75% over -40°C to +125°C. The MAX17551 uses peak-current-mode control and can be operated in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) modes. The device is available in a 10-pin (3mm×2mm) TDFN and 10-pin (3mm×3mm) μMAX packages. Simulation models are available.

Applications

• Industrial Sensors and Process Control
• High-Voltage LDO Replacement
• Battery-Powered Equipment
• HVAC and Building Control

Key features

• Reduces External Components and Total Cost
• No Schottky–Synchronous
• Internal Compensation for Any Output Voltage
• Built-In Soft-Start
• All-ceramic capacitors, Compact Layout
• Reduces Number of DC-DC Regulators to Stock
• Wide 4V to 60V Input
• Adjustable 0.8V to 0.9×VIN Output
• 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
• Reduces Power Dissipation
• 22μA Quiescent Current
• Peak Efficiency >90%
• PFM Enables Enhanced Light-load Efficiency
• 1.2μA Shutdown Current
• Operates Reliable in Adverse Environments
• Peak Current Limit Protection
• Built-In Output Voltage Monitoring RESET
• Programmable EN/UVLO Threshold
• Monotonic Startup in to Prebiased Load
• Overtemperature Protection
• High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range