概览
优势和特点
- Multiple Functions for Small Size
- Synchronous 750mA Boost Converter
- Fixed at 5V Output
- Dual Synchronous Buck Converters Up to 3.6A
- Factory-Configurable from 0.8V to 3.8V in 25mV Steps
- Programmable Windowed Watchdog
- 3.0V to 5.5V Operating Supply Voltage
- 2.2MHz Operation
- Individual Active-Low RESET_ Outputs
- High-Precision Performance
- ±1.9% Output-Voltage Accuracy (OUT1) and
- ±1.4% Output-Voltage Accuracy (OUT2, OUT3)
- ±1.3% OV/UV Monitoring (OUT1–OUT3, PV)
- Excellent Load-Transient Performance
- Diagnostics and Redundant Circuits
- ASIL-C Compliant
- Redundant Reference
- Fail Safe on Open Pins
- Shorted Pin Detection Active Low-RESET1–RESET3
- Input Overvoltage Detection
- Robust for the Automotive Environment
- Current Mode, Forced-PWM and Skip Operation
- Overtemperature and Short-Circuit Protection
- 24-Pin (4mm x 4mm) TQFN with Exposed Pad
- -40 °C to +125 °C Automotive Temperature Range
产品详情
The MAX20419 is a high-efficiency, 3-output, low-voltage DC-DC converter IC. OUT1 boosts the input supply to 5V at up to 750mA, while two synchronous step-down converters operate from a 3.0V to 5.5V input voltage range and provide a 0.8V to 3.8V output voltage range at up to 3.6A. The boost converter achieves ±1.9% and the buck converters achieve ±1.4% output error over load, line, and temperature range. The IC features a 2.2MHz fixed-frequency pulse-width modulation (PWM) mode for better noise immunity and load-transient response, and a pulse-frequency-modulation mode (skip) for increased efficiency during light-load operation. The 2.2MHz frequency operation allows the use of all-ceramic capacitors and minimizes external components. The programmable spread-spectrum frequency modulation minimizes radiated electromagnetic emissions. Integrated low RDS(ON) switches improve efficiency at heavy loads, and make the layout a much simpler task with respect to discrete solutions.
The IC is offered with factory-preset output voltages (see the Ordering Information/Selector Guide for available options). Other features include soft-start, overcurrent, and overtemperature protections. The MAX20419 also has several redundancy and diagnostic features for compatibility with ASIL-rated applications.
Applications
- ADAS
- Infotainment
- SOC Power
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). To request an NDA, click here.
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