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MAX17760

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

76V Synchronous Buck Converter with Internal FETs Enables High Efficiency and Low Temperature Rise

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Overview

Description

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

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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

Design Resources

MAX17760AEVKIT: Evaluation Kit for the MAX17760 in 5V Output-Voltage Application

Quality And Environmental

Request Reliability Report for: MAX17760

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C	Material Composition

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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