Data Sheet
MAX25320
ASIL D Compliant, Dual 1A Low-Voltage Buck Converter
General Description
Benefits and Features
The MAX25320 is a high-efficiency dual switching regulator
which delivers up to 1A load current per output from 0.5V to
1.59375V in 6.25mV steps and 1.6V to 3.6V in 25mV steps.
The IC operates from a 3.3V supply, making it ideal for
on-board point-of-load and post regulation applications. Total
output error is less than ±1% over load, line, and temperature.
● High Feature Set in Small Footprint
• High-Efficiency, Dual 1A DC-DC Converters
• 3.3V Operating Supply Voltage
• Factory Preset Output Voltage
• 2.1MHz Switching Frequency
• Individual Enable Inputs
• RESET and INT Open-Drain Outputs
• Spread-Spectrum Oscillator
• I C Interface
• Peak Current Mode Architecture
• PWM and SKIP Mode Operation
• 4mm x 4mm, 20-Pin TQFN
The MAX25320 features fixed-frequency PWM mode or SKIP
mode operation with a switching frequency of 2.1MHz. The
high-frequency operation allows for an all-ceramic capacitor
design and also allows for small-size external components.
2
®
The device features the MAXQ technology, which provides
precision transient performance and phase margin. This
allows obtaining the maximum power, performance, and
precision from the converter over a very wide range of con-
figurations.
● High Precision
• ±1% OV/UV Accuracy
• ±1% Output Voltage Accuracy
• Excellent Load Transient Performance
• MAXQ Power Architecture
The MAX25320 provides an enable input and output. The
output voltage is preset at the factory to allow customers to
achieve ±1% output-voltage accuracy without using expensive
0.1% resistors. The device offers factory-programmable soft-
start and RESET times.
● ASIL D Compliant
• Redundant Reference
• BIST Diagnostics
2
• PEC on I C
The device includes overtemperature shutdown and overcur-
rent limiting. It is designed to operate from -40°C to +125°C
ambient temperature range.
• Programmable OV/UV Thresholds
● High Efficiency
• Up to 91% Efficiency 3.3V to 1.8V
• Up to 85% Efficiency 3.3V to 0.825V
Applications
● Secondary Regulator for SoC/MCU Supply
● -40°C to +125°C Operating Temperature Range
● AEC-Q100 Qualified
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Rev. 1
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