MAX25249B
Overview
Features and Benefits
- Multiple Functions for Small Size
- 1A Synchronous High-Voltage Buck Converter
- Input Voltage Range 5V to 36V
- 3V to 4V, and 5V Output Voltage in 50mV Steps
- Two Synchronous Low-Voltage Buck Converters
- OUT2 and OUT3 Provide up to 1.2A
- 0.8V to 3.9875V in 12.5mV Steps
- LDO for Camera Sensor; 50dB at 1kHz
- 2.2MHz Operation
- Active-Low RESET Output – Push-Pull or Open-Drain
- 1A Synchronous High-Voltage Buck Converter
- High
Precision
- ±1.5% Output Voltage Accuracy
- ±1.3% OV/UV Monitoring Accuracy
- Diagnostics and Features
- ASIL B Compliant
- Redundant Reference
- Robust for the Automotive Environment
- Current-Mode, Forced-PWM Operation
- Overtemperature and Short-Circuit Protection
- 3.5mm x 3.5mm 20-Pin TQFN
- -40°C to +125°C Grade 1 Automotive Temperature Range
- AEC-Q100 Qualified
Product Details
The MAX25249/MAX25249B are high-efficiency, four-output PMICs that integrate three DC-DC converters and a high-PSRR LDO, with OV/UV monitoring on all outputs. OUT1 is a 1A high-voltage synchronous step-down converter operating from power over coax or car battery. OUT2 and OUT3 low-voltage synchronous step-down converters operate from OUT1 and provide a 0.8V to 3.9875V output voltage range. OUT2 can deliver 1.2A for high-megapixel cameras and high-speed serializers. OUT3 can deliver 1.2A to power the secondary rails of the imager, serializer, and MCU. OUT4 is a low-voltage, low-noise, high-PSRR LDO for imager power. All buck converters achieve ±1.5% output voltage accuracy over load, line, and temperature range. Overvoltage and undervoltage faults are monitored with ±1.3% accuracy around the set voltage, and errors are communicated through active-low RESET.
The devices feature a 2.2MHz fixed-frequency PWM mode for better noise immunity and load-transient response. The high-frequency operation allows for 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 layout simpler than discrete solutions.
Sequencing through the use of EN23 and EN4 pins and factory-settable output voltages increases flexibility for different image sensors and configurations. Other features include soft-start, overcurrent, and overtemperature protections. The MAX25249/MAX25249B are compliant with ASIL B ratings and are specified for operation over the -40°C to +125°C automotive temperature range.
Applications
- Front/Rear/Surround View Camera
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX25249BATPA/VY+ | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| MAX25249BATPA/VY+T | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| MAX25249BATPB/VY+ | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| MAX25249BATPB/VY+T | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| MAX25249BATPD/VY+ | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| MAX25249BATPD/VY+T | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| MAX25249BATPE/VY+ | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| MAX25249BATPE/VY+T | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| MAX25249BATPF/VY+ | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| MAX25249BATPF/VY+T | Material Declaration | Reliability Data | 20-LFCSP_SS-3.5X3.5X0.75 | |
| Wafer Fabrication Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.