The MAX17019 is a high-input-voltage quad-output controller (up to 38V). The MAX17019 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 voltage 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, 6mm x 6mm thin QFN package.
关键特性
应用/使用
Fixed-Frequency, Current-Mode Controllers
5.5V to 38V Input Range (Step-Down)
1x Step-Down Controller
1x Internal 5AP-P Step-Down Regulator
1x Internal 3AP-P Step-Down Regulator
1x 2A Source/Sink Linear Regulator with Dynamic REFIN
Internal BST Diodes
Internal 5V 50mA Linear Regulator
Fault Protection—Undervoltage, Overvoltage, Thermal, Peak Current Limit
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