General Description

The MAX25252 is a high-efficiency, five-output ASIL B

PMIC with three DC-DC converters, and two high-PSRR

LDOs, with OV/UV monitoring on all outputs. OUT1 is a

1A high-voltage, synchronous step-down converter operating from power over coax. OUT2 and OUT3 are low

voltage synchronous step-down converters and provide a

0.75V to 3.9375V output voltage range. OUT2 and OUT3

can deliver up to 1.7A current respectively for the highmegapixel cameras and high-speed serializers. LDO4 and

LDO5 deliver up to 0.4A and 0.9A of current to power the

secondary rails of the imager and a serializer. All outputs

achieve ±1.5% output accuracy over load, line, and temperature range. Overvoltage and undervoltage for each

output are monitored and their statuses are communicated through RESET and I2C.

The device features temperature monitoring with external

NTC. The IC accurately measures PCB temperature and

flags the temperature warning through RESET.

The device features a 2.1MHz fixed-frequency PWM

mode for better noise immunity and load transient response. The 2.1MHz frequency operation allows for the

use of all ceramic capacitors and minimizes external components. The programmable spread-spectrum frequency

modulation minimizes radiated electromagnetic emissions.

The I2C programmable output voltages and sequencing

increases flexibility for different image sensors and configurations. Other features include soft-start, overcurrent,

and overtemperature protections.

Applications

● Surround-View Cameras

● Rear-View Cameras

● Side-View Cameras

● Forward-Looking Cameras

Benefits and Features

● Multiple Functions for Small Size

• 1A Synchronous High-Voltage Buck Converter

• Input Voltage Range 3.5V to 22V

• 2.5V to 5V Output Voltage in 100mV Steps

• Two Synchronous Low-Voltage Buck Converters

• Delivers up to 1.7A Current

• 0.75V to 3.9375V Output Voltage in 12.5mV

Steps

• High-PSRR, Low-Voltage LDO for Camera Sensor

• Delivers up to 0.4A Current

• 0.75V to 3.9375V Output Voltage in 12.5mV

Steps

• Low-Voltage LDO

• Delivers up to 0.9A Current

• 0.75V to 3.9375V Output Voltage in 12.5mV

Steps

• 2.1MHz Operation

• RESET Output for OV/UV Detection and Other

Diagnostics

• SUP Voltage OV/UV Indication

● High Precision for ASIL B Applications

• ±1.5% Output Voltage Accuracy (OUT1-OUT5)

• ±1% OV/UV Monitoring Accuracy

● High-Precision Temperature Monitoring

• 12-Bit ADC for Accurate Board Temperature

• ±0.096% Voltage Measurement Accuracy

● Robust for the Automotive Environment

• ASIL B Compliant

• Current-Mode, Forced-PWM Operation

• Overtemperature and Short-Circuit Protection

• 5mm x 5mm, 28-Pin Side-Wettable TQFN

• -40°C to +125°C Automotive Temperature Range

• AEC-Q100 Qualified