Analog Devices / Maxim Integrated MAX20459 Automotive Step-Down Converter

Analog Devices MAX20459 Automotive High-Current Step-Down Converter integrates a 3A high-efficiency, automotive-grade, step-down converter, a USB Type-C DFP controller, and automatic BC1.2 DCP, Apple^®, plus Samsung^® dedicated charger-detection circuitry. The MAX20459 includes a USB load current-sense amplifier and configurable feedback-adjustment circuit designed to provide automatic USB voltage compensation.

The Analog Devices MAX20459 Automotive Converter is optimized for high-frequency operation and features programmable frequency selection from 310kHz to 2.2MHz, allowing optimization of efficiency, noise, and board space based on application requirements. The MAX20459 provides flexible configuration and advanced diagnostic options for both standalone and supervised applications. The converter can operate as a true one-chip solution, offering advanced fault auto-recovery and enables programming using external resistors and/or internal I²C registers.

The MAX20459 is designed to minimize the required external components and layout area. The device is available in a small 5mm x 5mm 32-pin TQFN package.

Features

One-chip type-C solution directly from car battery to portable device
- USB Type-C-compliant DFP controller
- Integrated iPhone^®/iPad^®, Samsung^® and BC1.2 DCP charger detection
- 4.5V to 28V Input (40V load dump), synchronous buck converter
- 5V to 7V, 3A Output capability
- Standalone device or I²C configuration options and fault autorecovery
Optimal USB charging and communication for portable devices
- User-programmable voltage gain adjusts output for up to 500mΩ cable resistance
- User-programmable USB current limit
Low-noise features prevent interference with AM band and portable devices
- Fixed-frequency 310kHz to 2.2MHz operation
- Fixed-PWM option at no load
- Spread spectrum for EMI reduction
- SYNC Input/output for frequency parking

Robust design keeps vehicle system and portable device safe in an automotive environment
- Short-to-battery protection on V_BUS, HVD± pins
- ±15kV Air/±8kV contact (330pF, 330Ω)
- ±15kV Air/±8kV contact ISO 10605 (330pF, 2kΩ)
- ±15kV Air/±8kV contact IEC 61000-4-2 (150pF, 330Ω)
- Overtemperature protection, warning, and intelligent current foldback
- AEC-Q100 qualified
- -40ºC to +125ºC Operating temperature range

Applications

Dedicated USB charging port (DCP)
Host and hub module dedicated charging ports
Dedicated charging modules

Analog Devices / Maxim Integrated MAX20459 Automotive Step-Down Converter

Features

Applications

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