Automotive Low-Voltage 2-Channel Step-Down Controller

The MAX20012B is a dual-output, high-efficiency synchronous step-down controller IC that operates with a 3.0V to 5.5V input voltage range and provides a 0.5V to 1.5875V output voltage range. The controller architecture enables up to 12A of load current per phase. Channel 1 has an option to operate with two phases to deliver higher load current, making this device ideal for automotive point-of-load (PoL) and post-regulation applications.

The IC achieves ±2% output error over load, line, and temperature ranges. The IC features a 2.2MHz fixed-frequency 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 the use of all-ceramic capacitors and minimizes external components. The programmable spread-spectrum frequency modulation minimizes radiated electromagnetic emissions.

The MAX20012B is offered with factory-preset output voltages (see the Selector Guide for options). The I2C interface supports dynamic voltage adjustment with programmable slew rates for each channel. Other features include programmable soft-start, overcurrent, and overtemperature protections.

Applications

* Automotive * Core Processor System/GPU Power

* 2-Channel High-Efficiency DC-DC Controller in a Small Solution Size

* 3.0V to 5.5V Operating Supply Voltage

* OUT1 Supports 24A (with Two Phases)

* OUT2 Supports 12A

* High-Precision Regulator for Applications Processors

* ±2% Output-Voltage Accuracy

* Differential Remote Voltage Sensing

* I2C-Controlled Output Voltage: 0.5V to 1.27V in 10mV Steps

* 0.625V to 1.5875V in 12.5mV Steps

* Excellent Load-Transient Performance

* Low-Noise Features Reduce EMI

* 2.2MHz Operation

* Spread-Spectrum Option

* Frequency-Synchronization Input/Output

* Current-Mode, Forced-PWM, and Skip Operation

* Robust for the Automotive Environment

* Individual Enable Inputs and PGOOD Outputs

* Low RDS(ON) External FETs

* Overtemperature and Short-Circuit Protection

* 32-Pin (5mm × 5mm) TQFN with Exposed Pad

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

* AECQ-100 Qualified