PRELIMINARY EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX20029/MAX20029B/ Automotive Quad/Triple Low-Voltage MAX20029C/MAX20029D Step-Down DC-DC Converters General Description Benefits and Features Quad Step-Down DC-DC Converters with Integrated The MAX20029/MAX20029B/MAX20029C/MAX20029D FETs power-management ICs (PMICs) integrate four low-volt- Operate from 3.0V to 5.5V Supply Voltage age, high-efficiency, step-down DC-DC converters. Each of the four outputs is factory or resistor programmable 0.7V to 4.0V Fixed or Adjustable Output Voltage between 1V to 4.0V (MAX20029/MAX20029B) or 0.7V 2.2MHz Switching Frequency to 3.8V (MAX20029C/MAX20029D). The MAX20029/ MAX20029/MAX20029C: Up to Four 1.5A Channels MAX20029C has two 0.5A/1A/1.5A channels and two MAX20029B/MAX20029D: Up to One 3A + Two 1.5A 0.5A/1.5A channels, while the MAX20029B/MAX20029D Channels has two 0.5A/1.5A channels and by combining channels Designed to Improve Automotive EMI Performance 1 and 2, a single 2A/3A channel. The PMICs operate from 3.0V to 5.5V, making them ideal for automotive point-of- Forced-PWM Operation load and post-regulation applications. Two Channels 180 Out-of-Phase The PMICs feature fixed-frequency PWM-mode operation SYNC Input with a switching frequency of 2.2MHz. High-frequency Spread-Spectrum Option operation allows for an all-ceramic capacitor design Soft-Start and Supply Sequencing Reduces Inrush and small-size external components. The low-resistance Current on-chip switches ensure high efficiency at heavy loads Individual Enable Inputs and Power-Good Outputs to while minimizing critical inductances, making the layout Simplify Sequencing a much simpler task with respect to discrete solutions. OV Input-Voltage Monitoring Internal current sensing and loop compensation reduce Overtemperature and Short-Circuit Protection board space and system cost. 28-Pin (5mm x 5mm x 0.8mm) TQFN-EP Package The PMICs offer a spread-spectrum option to reduce -40C to +125C Operating Temperature Range radiated emissions. Two of the four buck converters operate 180 out-of-phase with the internal clock. This feature reduces the necessary input capacitance and improves EMI as well. All four buck converters operate in Ordering Information appears at end of data sheet. constant PWM mode outside the AM band. The PMICs offer a SYNC input to synchronize to an external clock. The PMICs provide individual enable inputs and power-good/ reset outputs, as well as factory-programmable PG times. The PMICs offer several important protection features including: input overvoltage protection, input undervoltage lockout, cycle-by-cycle current limiting, and overtemperature shutdown. The MAX20029/MAX20029B/MAX20029C/MAX20029D PMICs are available in a 28-pin TQFN package with an exposed pad and are specified for operation over the -40C to +125C automotive temperature range. Applications Automotive Industrial 19-100083 Rev 11 2/20PRELIMINARY MAX20029/MAX20029B/ Automotive Quad/Triple Low-Voltage MAX20029C/MAX20029D Step-Down DC-DC Converters Simplified Block Diagram V OUT1 MAX20029 10k EN PG CONTROL 5V V A SYNC SS OSC 1F GND 5V 4 CHANNELS PV 2.2F 1.5H LX STEP-DOWN V OUT PWM OUT 22F 1.0V TO 4.0V UP TO 1.5A PGND OUTS EN EP Maxim Integrated 2 www.maximintegrated.com