The MAX16922 Power Management Integrated Circuit (PMIC) is designed for medium voltage automotive applications and integrates multiple power supplies in a small package. The device consists of a high voltage buck converter (OUT1) and three cascaded low voltage DC-DC converters (OUT2, OUT3, OUT4). OUT1/OUT2 is a step-down DC-DC converter (converter is a device that converts one signal into another. In automated instrumentation and automatic control systems, one signal is often converted into another The standard or reference signal is compared to connect the two types of meters. Therefore, the converter is often the middle of the two instruments. OUT3/OUT4 is a linear regulator. The device also includes a reset output (/RESET) and a high-voltage enable input (EN). MAX16922 classic application circuit
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The high-efficiency, step-down DC-DC converter (OUT1) with an output current of 1.2A operates at up to 28V with load-shedding protection with transient voltages up to 45V. The high efficiency, step-down DC-DC converter (OUT2) with an output current of 600mA operates at up to 5.5V. The voltage difference between the two 300mA LDO linear regulators is only 130mV (typ). The power-good/RESET output monitors the voltage of OUT1 and OUT2.
OUT1 and OUT2 use 2.2MHz faster PWM (pulse width modulation is the abbreviation of English "Pulse Width Modulation", referred to as pulse width modulation, is a very effective technology to control the analog circuit by using the digital output of the microprocessor. Widely used in many fields from measurement and communication to power control and conversion) switching frequency and small external components. The high voltage converter (OUT1) automatically enters the skip mode at light loads to avoid overvoltage faults at the output. The low-voltage synchronous DC-DC converter (OUT2) can operate in forced PWM mode (to avoid AM band interference) or high efficiency automatic PWM mode.
The MAX16922 features thermal shutdown and overcurrent limiting. The device operates over the -40°C to +125°C temperature range. 