Click here to ask about the production status of specific part numbers. MAX25232 36V, 3A Mini Buck Converters with 3.5A I Q General Description Benefits and Features The MAX25232 is a small, synchronous buck converter Synchronous DC-DC Converter with Integrated FETs with integrated high-side and low-side switches. The de- MAX25232ATCA/ATCB/ATCG/ATCH = 2.5A I OUT vice is designed to deliver up to 3A with 3.5V to 36V input MAX25232ATCD/ATCE/ATCF = 3A I OUT voltages while using only 3.5A quiescent current at no 3.5A Quiescent Current in Standby Mode load. Small Solution Size Saves Space The device provides an accurate output voltage of 2% 65ns Minimum On-Time in FPWM mode within the normal 6V to 18V operation in- 2.1MHz or 400kHz Operating Frequency put range. With 65ns minimum on-time capability, the con- Fixed 5V/3.3V Output Voltage with 2% Output verter is capable of large input-to-output conversion ra- Accuracy in FPWM Mode (5V/3.3V) tios. Voltage quality can be monitored by observing the Other Fixed V Options Between 3V - 5.5V (in OUT PGOOD signal. The device can operate in dropout by run- 50mV steps) Available for Precise Output Voltage ning at 99% duty cycle, making it ideal for automotive and Setting industrial applications. The IC comes in fixed output volt- External Resistor Divider Options to Adjust the age and adjustable output voltage (MAX25232ATCF and Output Voltage Between 3V and 10V MAX25232ATCG only) options. For MAX25232ATCF and Fixed 3.5ms Internal Soft-Start MAX25232ATCG, output voltage can be set between 3V Innovative Current-Mode-Control Architecture and 10V using an external resistor-divider. Frequency is Minimizes Total Board Space and BOM Count internally fixed at 2.1MHz, which allows for small external PGOOD Output and High-Voltage EN Input Simplify components and reduced output ripple, and guarantees Power Sequencing no AM interference. A 400kHz option is also offered to pro- Protection Features and Operating Range Ideal for vide minimum switching losses and maximum efficiency. Automotive Applications The device automatically enters skip mode at light loads 3.5V to 36V Operating V Range IN with ultra-low 3.5A quiescent current at no load. The de- 40V Load-Dump Protection vice offers pin-enabled spread-spectrum-frequency mod- 99% Duty-Cycle Operation with Low Dropout ulation designed to minimize EMI-radiated emissions due -40C to +125C Automotive Temperature Range to the modulation frequency. AEC-Q100 Qualified The MAX25232 variants are available in a small (3mm x 3mm) 12-pin TDFN package with an exposed pad, and re- Ordering Information appears at end of data sheet. quires very few external components. Applications Automotive Industrial High-Voltage DC-DC Converters 19-100723 Rev 3 4/21MAX25232 36V, 3A Mini Buck Converters with 3.5A I Q Simplified Block Diagram SPS SYNC MAX25232 REF EN HVLDO BANDGAP OSC BST BIAS SUP CLK CURRENT SENSE SOFTSTART + SLOPE COMP LOGIC LX OUT CONTROL BIAS PWM EAMP FB FB SW1 COMP V/RESET SW2 GND MAX25232ATCF MAX25232ATCG PGOOD www.maximintegrated.com Maxim Integrated 2