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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX25250 Datasheet

Four Output Mini PMIC

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MAX25250
Four Output Mini PMIC for Camera Applications
General Description
The MAX25250 is a high-efficiency, four-output PMIC that
integrates 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 oper-
ating from power over coax or car battery. OUT2 and
OUT3 low-voltage synchronous step-down converters op-
erate 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
and errors are communicated through RESET.
This device features a 2.2MHz fixed-frequency PWM
mode for better noise immunity and load-transient re-
sponse. The high-frequency operation allows for the use
of all ceramic capacitors and minimizes external com-
ponents. The programmable spread-spectrum frequency
modulation minimizes radiated electromagnetic emis-
sions. Integrated low-RDS(ON) switches improve efficiency
at heavy loads and make layout simpler than discrete so-
lutions.
Sequencing through the use of EN23 and EN4 pins and
factory-settable output voltages increases flexibility for dif-
ferent image sensors and configurations. Other features
include soft-start, overcurrent, and overtemperature pro-
tection. The MAX25250 is specified for operation over the
-40°C to +125°C automotive temperature range.
Applications
● Surround-View Cameras
● Rear-View Cameras
Benefits and Features
● Multiple Functions for Small Size
• 1A Synchronous High-Voltage Buck Converter
• Input Voltage Range 5V to 22V
• 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
• RESET Output – Open-Drain
• High-Precision
• ±1.5% Output Voltage Accuracy
• OV/UV Monitoring
● 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
Ordering Information appears at end of data sheet.
19-100966; Rev 0; 4/21


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX25250 Datasheet

Four Output Mini PMIC

No Preview Available !

MAX25250
Four Output Mini PMIC for Camera Applications
Simplified Block Diagram
OUT1
EN23
EN4
RESET
MAX25250
HV
BUCK CONVERTER
(5-22VIN)
LV
BUCK CONVERTER
LOGIC, INTERNAL
SEQUENCING,
DIAGNOSTICS
LV
BUCK CONVERTER
OV/UV
COMPARATORS
LV
PMOS LDO
OUT2
OUT3
OUT4
www.maximintegrated.com
Maxim Integrated | 2


Part Number MAX25250
Description Four Output Mini PMIC
Maker Maxim Integrated
PDF Download

MAX25250 Datasheet PDF






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