4.5V–60V, 1A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

The MAX17572 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 1A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.2% over -40°C to +125°C. The MAX17572 uses peak current-mode control.

The device is available in a 12-pin (3mm x 3mm) TDFN package. Simulation models are available.

Design Solution: Design 20W–30W Power Supplies with Over 90% Efficiency for 24V+ Industrial Automation Systems ›

Applications

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

* 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 0.9V to 0.9 x VIN Output

* Continuous 1A Current Over Temperature

* 400kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization

* Reduces Power Dissipation

* Peak Efficiency > 92%

* Auxiliary Bootstrap LDO for Improved Efficiency

* 4.65μA Shutdown Current

* Operates Reliably in Adverse Industrial Environments

* Hiccup Mode Overload Protection

* Adjustable Soft-Start

* Built-In Output-Voltage Monitoring with Active-Low RESET

* Programmable EN/UVLO Threshold

* Monotonic Startup into Prebiased Load

* Overtemperature Protection

* High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range