MAX724 Datasheet | Maxim Integrated

Description The MAX724/MAX726 are monolithic, bipolar, pulsewidth modulation (PWM), switch-mode DC-DC regulators optimized for step-down applications. The MAX724 is rated at 5A, and the MAX726 at 2A. Few external ponents are needed for standard operation because the power switch, oscillator, and control circuitry are all on-chip. Employing a classic buck topology, these regulators perform high-current stepdown functions, but can also be configured as inverters, negative boost converters, or flyback converters. These regulators have excellent dynamic and transient response characteristics, while featuring cycle-by-cycle current limiting to protect against overcurrent faults and short-circuit output faults. The MAX724/MAX726 also have a wide 8V to 40V input range in the buck stepdown configuration. In inverting and boost configurations, the input can be as low as 5V. The MAX724/MAX726 are available in a 5-pin TO-220 package. The devices have a preset 100k Hz oscillator frequency and a preset current limit of 6.5A (MAX724) or 2.6A (MAX726). ___________________________Features o Input Range: Up to 40V o 5A On-Chip Power Switch (MAX724) 2A On-Chip Power Switch (MAX726) o Adjustable Output: 2.5V to 35V o 100k Hz Switching Frequency o Excellent Dynamic Characteristics o Few External ponents o 8.5m A Quiescent Current o TO-220 Package MAX724/MAX726 ______________Ordering Information PART MAX724CCK MAX724ECK MAX726CCK MAX726ECK TEMP. RANGE 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C PIN-PACKAGE 5 TO-220 5 TO-220 5 TO-220 5 TO-220 _______________________Applications Distributed Power from High-Voltage Buses High-Current, High-Voltage Step-Down Applications High-Current Inverter Negative Boost Converter Multiple-Output Buck Converter Isolated DC-DC Conversion __________Typical Operating Circuit __________________Pin Configuration FRONT VIEW INPUT 8V TO 40V 220µF VIN VSW 50µH MBR745 FB 2.21k GND 0.01µF OUTPUT 5V AT 5A 2.8k 470µF VC 2.7k MAX724...