MAX17574ATG+T

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 up to 90%VIN. The feedback voltage regulation accuracy over -40℃ to +125℃ is ±0.9%. The MAX17574 features a peak-current-mode control architecture. The device can be operated in the pulsewidth 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. The MAX17574 is available in a 24-pin (4mm × 5mm) TQFN package. Simulation models are available.

Applications

• Industrial Control Power Supplies
• General-Purpose Point-of-Load
• Distributed Supply Regulation
• Base Station Power Supplies
• Wall Transformer Regulation High-Voltage, Single-Board Systems

Key features

• Reduces External Components and Total Cost
• No Schottky-Synchronous Operation
• Internal Compensation for Any Output Voltage
• All-Ceramic Capacitors, Compact Layout
• Reduces Number of DC-DC Regulators to Stock
• Wide 4.5V to 60V Input
• Adjustable Output Voltage Range from 0.9V up to 90% of VIN
• Delivers up to 3A Current Over Temperature
• 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
• Reduces Power Dissipation
• Peak Efficiency >90%
• PFM and DCM Modes Enable Enhanced Light-Load Efficiency
• Auxiliary Bootstrap LDO for Improved Efficiency
• 2.8μA Shutdown Current
• Hiccup Mode Overload Protection
• Adjustable Soft-Start and Prebiased Power-Up
• Built-In Output-Voltage Monitoring with RESET
• Programmable EN/UVLO Threshold
• Monotonic Startup Into Prebiased Load
• Overtemperature Protection
• High Industrial -40℃ to +125℃ Ambient Operating Temperature Range/-40℃ to +150℃ Junction Temperature Range