The MAX17550 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 25mA and generates output voltages from 0.8V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.75% over -40°C to +125°C.
The MAX17550 uses peak-current-mode control. The device can be operated in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) modes.
The device is available in a 10-pin (3mm x 2mm) TDFN and 10-pin (5mm x 3mm) µMAX® packages. Simulation models are available.
Applications
Battery-Powered Equipment
High-Voltage LDO Replacement
HVAC and Building Control
Industrial Sensors and Process Control
Features and Benefits
Reduces External Components and Total Cost
No Schottky—SynchronousInternal Compensation for Any Output Voltage
Built-In Soft-Start
All-Ceramic Capacitors, Compact Layout
Reduces Number of DC-DC Regulators to Stock
100kHz to 2.2MHz Adjustable Switching Frequency with External SynchronizationReduces Power Dissipation
22μA Quiescent Current
Peak Efficiency > 90%
PFM Enables Enhanced Light-Load Efficiency
1.2μA Shutdown Current