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MAX20471/MAX20472
Low-Voltage Synchronous
Boost Converter
General Description
Benefits and Features
● Synchronous Boost Converter
The MAX20471 and MAX20472 are high-efficiency, low-
voltage DC-DC converters that boost a 3.0V to 4.0V input
supply to between 3.8V and 5.25V (factory configurable)
at 500mA or 1A. The boost converters achieve ±1.5%
output error over load, line, and temperature ranges.
• 3.8V to 5.25V Factory-Preset Output in
50mV Steps
• 500mA or 1A Output Versions
● 3.0V to 4.0V Operating Supply Voltage
● True Output Shutdown
● 2.2MHz Switching Operation
● Open-Drain Reset Output Pin (RESET)
● Spread-Spectrum Enable Pin (EN)
● High Precision
The ICs feature a 2.2MHz fixed-frequency, forced pulse-
width modulation (FPWM) mode for better noise immunity
and load-transient response, as well as a pulse-frequency
modulation (skip) mode for increased efficiency during
light-load operation. The 2.2MHz frequency operation
enables the use of all-ceramic capacitors and minimizes
external components. The programmable spread-spectrum
frequency modulation minimizes radiated electromagnetic
• ±1.5% Output-Voltage Accuracy
• 93 ±2% Undervoltage Monitoring
• 107 ±2% Overvoltage Monitoring
• Good Load-Transient Performance
emissions. Integrated low R
switches improve effi-
DS(ON)
ciency at heavy loads, which make the layout a much sim-
pler task with respect to discrete solutions.
● Robust for the Automotive Environment
• Current-Mode Control, Forced-PWM, and Skip
Operation
• Overtemperature and Overcurrent Protection
• 12-Pin (3mm x 3mm) TDFN
Other features of the parts include true output shutdown,
soft-start ramping, overcurrent limiting, and overtempera-
ture protection.
• 12-Pin (3mm x 3mm) SWTDFN
• 8-Pin (0.150”) SOIC (MAX20471 Only)
• -40°C to +125°C Automotive Temperature Range
Applications
● Automotive Point of Load
● Automotive CAN Transceivers
Ordering Information appears at end of data sheet.
19-100163; Rev 9; 8/19