MAX17501EATB+T

The MAX17501 high-efficiency, high-voltage, synchro­nous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input voltage range. This device is offered in a fixed 3.3V, 5V, or adjustable output voltage (0.9V to 92%VIN) while delivering up to 500mA of current. The output voltage is accurate to within ±1.7% over -40°C to +125°C. The MAX17501 is available in a compact TDFN package. Simulation models are available. The device features peak-current-mode control with pulse-width modulation (PWM). Users can choose devices with either pulse frequency modulation (PFM) or forced PWM scheme. PFM devices skip pulses at light load for higher efficiency, while forced-PWM devices operate with fixed switching frequency at any load for noise sensitive applications. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout. 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.

Applications

• Industrial Process Control
• HVAC and Building Control
• Base Station, VOIP, Telecom
• Home Theatre
• Battery-Powered Equipment
• General-Purpose Point-of-Load

Key features

• Eliminates External Components and Reduce Total Cost
• No Schottky-Synchronous Operation for High Efficiency and Reduced Cost
• Internal Compensation and Feedback Divider for 3.3V and 5V Fixed Outputs
• All-Ceramic Capacitors, Ultra-Compact Layout
• Reduces Number of DC-DC Regulators to Stock
• Wide 4.5V to 60V Input Voltage Range 0.9V to 92%VIN Adjustable Output Voltage Delivers Up to 500mA 600kHz and 300kHz Switching Frequency Options
• Available in a 10-Pin, 3mm×2mm TDFN Package
• Reduces Power Dissipation
• Peak Efficiency >90%
• PFM Feature for High Light-Load Efficiency
• Shutdown Current = 0.9μA (typ)
• Operates Reliably in Adverse Industrial Environments
• Hiccup-Mode Current Limit, Sink Current Limit, and Autoretry Startup Built-In Output-Voltage Monitoring (Open-Drain RESET Pin) Resistor-Programmable EN/UVLO Threshold Adjustable Soft-Start and Prebiased Power-Up High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range