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The MAX25203DATJA is a dual-phase synchronous boost controller for automobiles, featuring programmable gate drive and I2C. It is suitable for applications such as automotive infotainment systems and automotive audio amplifiers.

Typical application scenarios

The MAX25203DATJA is widely used in:

Infotainment system

Automobile audio amplifier

It can remain in the adjusted state during cold crank or start-stop operation until the battery input is 1.8V. In addition, the MAX25203DATJA can also be used to generate voltage display backlight and Class D audio amplifier ‌.

Features

Meet the strict OEM module power consumption and performance specifications

The output voltage accuracy on the FB side is ±1.5%

The output voltage can be adjusted between 12V and 65V (70V, absolute maximum value).

The power supply cut-off current is 5μA

High efficiency and current sharing

The efficiency is over 98%

A one-time programmable (OTP) gate drive voltage ranging from 6.5V to 10V enables users to optimize external MOSFETs and enhance efficiency

The current sharing accuracy among each phase is ±5%, which can improve the system efficiency

Programmable current limit blanking can handle high-peak loads without the need for overly large inductors

The EMI suppression function can effectively reduce interference to sensitive radio frequency bands without compromising the wide input voltage range

Spread spectrum option

Real-time frequency synchronization input

The programmable frequency of the resistor ranges from 220kHz to 2.1MHz

Synchronous output provides a 90° out-of-phase clock for four-phase operation

Integrated and heat-resistant performance enhanced packaging saves circuit board space and cost

Current mode controller with forced continuous and jump modes

The 32-pin TQFN-EP package is wettable on the side

Protection functions and I2C diagnosis can enhance the reliability of the system

Operate under-voltage locking

Short-circuit protection with True ShutdownTM

Under-voltage locking of the power supply is achieved through I2C

Monitor the temperature of the die through I2C

Monitor the currents of each phase through I2C

Overview

The MAX25203DATJA automotive dual-phase synchronous boost controller enables the infotainment system to remain regulated during cold start or start-stop operations until the battery input voltage drops to 1.8V. They can also be used to generate backlight voltages and Class D audio amplifier voltages. These devices can be started with an input voltage power supply ranging from 4.5V to 42V. After startup, they can operate at A voltage as low as 1.8V and have a low turn-off power supply current of 5μA.

The MAX25203DATJA operates at a frequency as high as 2.1MHz, allowing for the use of smaller external components and reducing output ripple, while ensuring no AM band interference. The switching frequency can be adjusted by a resistor (from 220kHz to 2100kHz), and it can also be synchronized instantly to an external clock.

The MAX25203DATJA features a spread spectrum option for frequency modulation, thereby minimizing EMI interference. The 90° out-of-phase clock output can synchronize the second MAX25203D to achieve four-phase operation.

When the power supply voltage exceeds the output regulation voltage, the efficiency of the direct operation exceeds 98%. Programmable current limit blanking can handle high-peak loads without the need for overly large inductors.

The MAX25203DATJA features a power readiness monitor and undervoltage locking function. The protection functions include weekly periodic flow value and thermal shutdown. These devices operate within the automotive temperature range of -40°C to +125°C.

To obtain an exclusive quote for MAX25203DATJA, please contact MAX25203DATja via www.hkmjd.com.