MAX17019 is a high-input-voltage quad-output controller (up to 38V). It provides a compact, low-cost controller capable of providing four independent regulators—a main stage, a 3AP-P internal step-down, a 5AP-P internal step-down, and a 2A source/sink linear regulator. The input voltage is up to 38V. This makes it an excellent choice for automotive applications. The internal switching regulators include 5V synchronous MOSFETs that can be powered directly from a single Li+ cell or from the main 3.3V/5V power stages. Finally, the linear regulator is capable of sourcing and sinking 2A to support DDR termination requirements or to generate a fixed output voltage. The step-down converters use a peak current-mode, fixed-frequency control scheme—an easy to implement architecture that does not sacrifice fast-transient response. This architecture also supports peak current-limit protection and pulse-skipping operation to maintain high efficiency under light-load conditions. Separate enable inputs and independent open-drain power-good outputs allow flexible power sequencing. A soft-start function gradually ramps up the output volt- age to reduce the inrush current. Disabled regulators enter high-impedance states to avoid negative output voltage created by rapidly discharging the output through the low-side MOSFET. The MAX17019 also includes output undervoltage, output overvoltage, and thermal-fault protection. The MAX17019 is available in a 48-pin QFN package.
The MAX17019 provides four independent regulators: a main step‑down, internal 3 A and 5 A step‑down converters, and a 2 A source/sink linear regulator. It operates from 5.5 V to 38 V input and includes fault protection such as undervoltage, overvoltage, thermal shutdown, and peak‑current limit.
The device is offered in a 48‑pin 6 mm × 6 mm thin QFN package and includes detailed electrical characteristics, PCB layout guidelines, and application notes for automotive battery‑powered devices, embedded control systems, and set‑top boxes.
| 5 V Linear Regulator Output Voltage | 4.75 V to 5.2 V |
|---|---|
| Reference Output Voltage | 1.237 V to 1.263 V |
| Oscillator Frequency | 0.9 MHz to 11 MHz |
| Maximum Duty Cycle (All Switching Regulators) | 80 % to 93.5 % |
It provides output undervoltage, overvoltage, thermal‑shutdown, and peak‑current‑limit protection.
The device is supplied in a 48‑pin 6 mm × 6 mm thin QFN package.
The oscillator can be set between 0.9 MHz and 11 MHz.