42V, 500mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter

The MAX17541G high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over 4.5V to 42V input. The converter can deliver up to 500mA and generates output voltages from 0.9V up to 0.92 x VIN. The feedback (FB) voltage is accurate to within ±1.7% over -40°C to +125°C.

The MAX17541G uses peak-current-mode control with pulse-width modulation (PWM) and operates with fixed 600kHz switching frequency at any load. The device is available in a 10-pin (3mm × 2mm) TDFN package. Simulation models are available.

Applications

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

* Reduces External Components and Total Cost

* No Schottky-Synchronous Operation

* All-Ceramic Capacitors, Ultra-Compact Layout

* Reduces Number of DC-DC Regulators to Stock

* Wide 4.5V to 42V Input

* Adjustable 0.9V to 92%VIN Output

* Delivers up to 500mA

* 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 (Active-Low RESET Pin)

* 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