Analog Devices MAX17502 | Demoboard MAXREFDES1009

Description

The MAX17502 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 1A of current. The output voltage is accurate to within ±1.7% over -40°C to +125°C. The MAX17502 is available in compact TDFN and TSSOP packages. Simulation models are available. The device features peak-current-mode control with pulse-width modulation (PWM) and operates with fixed switching frequency at any load. 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 active-low RESET pin provides a delayed power-good signal to the system upon achieving successful regulation of the output voltage.

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 1A◦600kHz and 300kHz Switching Frequency Options◦Available in a 10-Pin, 3mm × 2mm TDFN and 14-Pin, 5mm × 4.4mm TSSOP Packages
• Reduces Power Dissipation ◦Peak Efficiency > 90%◦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 Active-Low 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

Typical applications

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

More information

• IC product information