MAXREFDES1045

説明

The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input. The converter can deliver up to 3A current. Output voltage is programmable from 0.9V to 90%VIN. The feedback voltage regulation is accurate to within ±0.9% over -40°C to +125°C. The MAX17574 features a peak-current-mode control architecture. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM) control schemes. A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input voltage level. An open-drain RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage.

機能と利点

• Reduces Number of External Components and Total Cost
• Reduces Number of DC-DC Regulators to Stock
• Reduces Power Dissipation
• Operates Reliably in Adverse Industrial Environments