4.5V to 60V, Dual 3A, High-Efficiency, Synchronous Step-Down DC-DC Converter

The MAX17524 dual 3A, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated high-side MOSFETs operates over an input-voltage range of 4.5V to 60V. The device can deliver up to 3A on each output and generates output voltages from 0.9V up to 90% of VIN. This device features internal compensation.

The MAX17524 uses peak current-mode control, and can be operated in pulse-width modulation (PWM), pulse-frequency modulation (PFM), and discontinuous-conduction mode (DCM) to enable high efficiency under light-load conditions.

The feedback-voltage regulation accuracy is accurate to within ±1.4% over -40°C to +125°C. The device is available in a 32-pin (5mm x 5mm) Thin QFN (TQFN) package. Simulation models are available.

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 Components

* All-Ceramic Capacitors, Compact Layout

* Reduces Number of DC-DC Regulators to Stock

* Wide 4.5V to 60V Input

* Adjustable Output Range from 0.9V up to 90% of VIN

* Delivers up to 3A on Each Output Over the Temperature Range

* 100kHz to 1.1MHz Adjustable Frequency with External Clock Synchronization

* Available in a 32-Pin, 5mm x 5mm TQFN Package

* Independent Input-Voltage Pins for Each Output

* Reduces Power Dissipation

* Peak Efficiency of 94.4%

* PFM and DCM Modes Enable Enhanced Light-Load Efficiency

* Auxiliary Bootstrap Supply (EXTVCC) for Improved Efficiency

* 5.2μA Shutdown Current

* Operates Reliably in Adverse Industrial Environments

* Hiccup-Mode Overload Protection

* Independent Adjustable Soft-Start Pin and Programmable EN/UVLO Pin for Each Output

* Monotonic Startup with Prebiased Output Voltage

* Built-in Independent Output-Voltage Monitoring with Active-Low RESET for Each Output

* Overtemperature Protection

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