Dual 6A, High-Efficiency, Low-Voltage Buck Converter

The MAX20429 is a high-efficiency, dual switching regulator that delivers up to 6A (peak) load current per output from 0.5V to 1.5875V in 12.5mV steps and 1.6V to 3.8V in 50mV steps. The IC operates from 3V to 5.5V, making it ideal for on-board point-of-load and post-regulation applications. Total output error is less than ±1.0% over load, line, and temperature.

The MAX20429 features fixed-frequency, PWM mode operation with a switching frequency of 2.1MHz or 3.2MHz. High-frequency operation allows for an all-ceramic capacitor design with small external components.

The low-resistance on-chip switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout a much simpler task with respect to discrete solutions. Following a simple layout and footprint ensures first-pass success in new designs.

The device features MAXQ™ technology, which provides precision transient performance and phase margin. This allows obtaining the maximum power, performance, and precision from the converter over a very wide range of configurations.

The MAX20429 has separate enable inputs and status outputs for each buck converter. The output voltage is preset at the factory to allow customers to achieve ±1% output-voltage accuracy without using expensive 0.1% resistors. The device offers factory-programmable soft-start and active-low RESET times.

The device includes overtemperature shutdown and overcurrent limiting and is designed to operate over the –40°C to +125°C ambient temperature range.

Applications

* Secondary Regulator for SoC/MCU Supply

* High-Feature Set in an Ultra-Small Footprint

* High-Efficiency DC-DC Converter

* Two Independent Outputs, up to 6A per Output

* 3.0V to 5.5V Operating Supply Voltage

* Resistor-Adjustable Output Voltage

* Optional Factory-Preset Output Voltage

* 2.1MHz/3.2MHz Options

* Enable Input

* Individual Active-Low RESET Outputs

* Spread-Spectrum Option

* Peak Current-Mode Architecture

* 3mm x 3.5mm FCQFN

* High-Precision

* 108/92% OV/UV Monitor

* ±3% UV Accuracy

* ±4% OV Accuracy

* ±1% Output Voltage Accuracy

* Excellent Load-Transient Performance

* PWM and SKIP Mode Operation

* MAXQ Power Architecture

* High Efficiency

* Up to 96% Efficiency 5V to 3.3V

* Up to 90% Efficiency 5V to 1V

* -40°C to +125°C Operating Temperature Range

* AEC-Q100 Qualified