60V, 1A, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter

Description

Create a design and simulate using EE-Sim^® tools:

Create a design and simulate using EE-Sim^®: MAX17502

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%V_IN) 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.

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%V_IN 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

Applications/Uses

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