4.5V–60V, 5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

The MAX17506 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated high-side MOSFET operates over a 4.5V to 60V input. The converter can deliver up to 5A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.4% over -40°C to 125°C.

The MAX17506 uses peak current-mode control. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), and discontinuous conduction mode (DCM) control schemes.

The device is available in a 20-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 Power Supplies * Wall Transformer Regulation

* Reduces External Components and Total Cost

* No Schottky-Synchronous Operation

* Internal Compensation for Any Output Voltage

* Built-In Soft-Start

* All-Ceramic Capacitors, Compact Layout

* Reduce Number of DC-DC Regulators to Stock

* Wide 4.5V to 60V Input

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

* 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization

* Reduces Power Dissipation

* Peak Efficiency > 95%

* PFM/DCM Modes Enables Enhanced Light-Load Efficiency

* Auxiliary Bootstrap LDO for Improved Efficiency

* 3.5µA Shutdown Current

* Operates Reliably in Adverse Industrial Environments

* Hiccup or Latchoff Mode Overload Protection

* DL to LX Short Detection Feature

* 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 / -40°C to +150°C Junction Temperature Range