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

 

Part Number	Replacement	Explanation

Description

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

The MAX17760 features a peak-current-mode control architecture. The device 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.

MAX17760: Simplified Application Circuit Enlarge+

Key Features

• 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 V_IN
  • 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

Applications/Uses

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