4.5V to 76V, 300mA, High-Efficiency, Synchronous Step-Down DC-DC Converter

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions.The MAX17760/MAX17760A are high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converters with integrated MOSFETs that operate over a 4.5V to 76V input-voltage range. They can deliver up to 300mA current. Output voltage is programmable from 0.8V up to 88% of input voltage (VIN). Built-in control loop compensation eliminates the need for external components.

The MAX17760/MAX17760A feature a peak-current-mode control architecture. The devices can be operated in either the forced pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. Forced PWM mode provides constant frequency operation at all loads for frequency sensitive applications, while PFM mode provides superior light-load efficiency by skipping pulses. The device integrates an open drain active-low RESET output voltage monitor, adjustable input undervoltage lockout (EN/UVLO) and programmable soft-start. The feedback voltage regulation accuracy over -40°C to +125°C is +1.6% to -1.7%. The MAX17760 is available in a compact 12-pin (3mm x 3mm) TDFN package. Simulation models are available.

Applications

* Industrial Control Power Supplies

* General Purpose Point-of-Load

* Distributed Supply Regulation

* Base Station Power Supplies

* Wall Transformer Regulation

* High Voltage Single-Board Systems

* 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 76V Input

* Adjustable Output Range from 0.8V up to 88% of VIN

* Up to 300mA Output Current

* 200kHz, 300kHz, 400kHz, and 600kHz Programmable Switching Frequency with External Clock Synchronization

* Reduces Power Dissipation

* 93% Peak Efficiency

* PFM Mode Enables Enhanced Light-Load Efficiency

* EXTVCC Bootstrap Input for Improved Efficiency

* 5µA Shutdown Current

* Operates Reliably in Adverse Industrial Environments

* Built-in Hiccup Mode Overload Protection

* Programmable Soft-Start and Prebiased Power-up

* Built-in Output-Voltage Monitoring with active-low RESET

* Programmable EN/UVLO Threshold

* Overtemperature Protection

* CISPR 22 Class B Compliant

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