Eight-Output ASIL D PMIC

The MAX25229 is a high-efficiency, eight-output, low-voltage PMIC. OUT1 is a 1.6A boost converter which can boost a 3.3V input supply to 5V at up to 500mA output current, while four synchronous step-down converters provide an output voltage range of 0.5V to 2.0V at up to 4A for 1-phase and 8A for 2-phase operation. Three 600mA PMOS LDOs operate from an input voltage range of 2.7V to 5.5V and provide an output voltage of 0.5V to 3.68V. All DC-DC converters achieve ±1% DC accuracy over load, line, and temperature range, while the LDOs achieve ±3% AC+DC accuracy.

This device features a 2.1MHz fixed-frequency PWM mode for better noise immunity and load-transient response. The high switching frequency operation allows for the use of all ceramic capacitors and minimizes external components. The spread-spectrum frequency modulation minimizes radiated electromagnetic emissions. Integrated low RDS(ON) switches improve efficiency at heavy loads and simplify the layout with respect to discrete solutions. The MAXQ™ architecture minimizes output capacitance for each output by individually optimizing each output for the application requirements and eliminating process variations that reduce performance.

The device is offered with factory-preset output voltages. See the Ordering Information table for options.

APPLICATIONS

* Domain ECU

* Advanced Driver-Assistance Systems

* Multiple Functions for Small Size

* Synchronous 5V Boost Converter

* Up to 700mA Output Current

* Four 4A Buck Converters

* OUT2–4: 0.5V to 2.0V

* OUT5: 0.5V to 3.3V

* Supports Dual-Phase Operation

* Three 600mA PMOS LDOs

* Can Be Configured as Voltage Monitors

* Five Programmable GPIO Pins

* Challenge-Response Watchdog

* I2C Fast-mode Plus-Compatible Interface

* 2.1MHz Internal Operation with Spread Spectrum

* High-Precision Performance

* ±1% Output Voltage Accuracy

* ±1% OV/UV Monitoring

* Excellent Load-Transient Performance

* MAXQ™ Architecture