2.2MHz Sync Boost and Dual Step-Down Converters

The MAX20014 is a high-efficiency three-output low-voltage DC-DC converter. OUT1 boosts the input supply up to 8.5V at up to 750mA, while two synchronous step-down converters operate from a 3.0V to 5.5V input voltage range and provides a 0.8V to 3.8V output voltage range at up to 3A. The boost converter achieves ±2% and the buck converters achieve ±1.5% output error over load, line, and temperature range.

The device features a 2.2MHz fixed-frequency pulse-width modulation (PWM) mode for better noise immunity and load transient response, and a pulse-frequency modulation mode (skip) for increased efficiency during light-load operation. The 2.2MHz frequency operation allows for the use of all-ceramic capacitors and minimizes external components footprint. The programmable spread-spectrum frequency modulation minimizes radiated electromagnetic emissions. Integrated low RDS(ON) switches improve efficiency at heavy loads and make the layout a much simpler task with respect to discrete solutions.

The device is offered with factory-preset output voltages or resistor-adjustable output voltages. Other features include soft-start, overcurrent, and overtemperature protections.

Design Solution: How to Shrink Your ADAS ECUs: Wrap the Power Management Around the Signal Chain ›

Applications

* All Automotive

* Multiple Functions for Small Size

* Synchronous 750mA Boost Converter

* Fixed from 3.8V to 8.5V in 100mV Steps

* Dual Synchronous Buck Converters Up to 3A

* Factory-Configurable Output Voltages from 0.8V to 3.8V in 25mV Steps

* Resistor Adjustable

* 3.0V to 5.5V Operating Supply Voltage

* 2.2MHz Operation

* Undervoltage Threshold of 93% ±3%

* Overvoltage Threshold of 107% ±3%

* Individual Active-Low RESET Outputs

* High-Precision

* ±1.5% Output-Voltage Accuracy

* Good Load Transient Performance for Buck Converters

* Robust for the Automotive Environment

* Current Mode, Forced-PWM, and Skip Operation

* Overtemperature and Short-Circuit Protection

* 4mm × 4mm 24-Pin TQFN

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