MAX789 Datasheet | Maxim Integrated

Description The MAX787/MAX788/MAX789 are monolithic, bipolar, pulse-width modulation (PWM), switch-mode, step-down DC-DC regulators. Each is rated at 5A. Very few external ponents are needed for standard operation because the power switch, oscillator, feedback, and control circuitry are all on-chip. Employing a classic buck topology, these regulators perform high-current step-down functions. The MAX787/MAX788/MAX789 have excellent dynamic and transient response characteristics, while featuring cycle-by-cycle current limiting to protect against overcurrent faults and short-circuit output faults. They also have a wide 8V to 40V input range. Each regulator is available in a 5-pin TO-220 package. These devices have a preset 100k Hz oscillator frequency and a preset current limit of 6.5A. See the MAX724/ MAX726 data sheet for more applications information. ___________________________Features o Input Range: Up to 40V o 5A On-Chip Power Switch o Fixed Outputs: 5V (MAX787) 3.3V (MAX788) 3V (MAX789) o 100k Hz Switching Frequency o Excellent Dynamic Characteristics o Few External ponents o 8.5m A Quiescent Current o TO-220 Package MAX787/MAX788/MAX789 ______________Ordering Information PART MAX787CCK MAX787ECK MAX788CCK MAX788ECK MAX789CCK MAX789ECK TEMP. RANGE 0°C to +70°C -40°C to +85°C 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 5 TO-220 5 TO-220 _______________________Applications Distributed Power from High-Voltage Buses High-Current, High-Voltage Step-Down Multiple-Output Buck Converter ___________Product Selection Guide PART MAX724 MAX726 MAX727 VOUT (V) Adjustable Adjustable 5 3.3 3 5 3.3 3 IOUT MAX (A) 5 2 2 2 2 5 5 5 __________Typical Operating Circuit MAX728 MAX729 MAX787 MAX788 INPUT 8V TO 40V VIN 220µF VSW 50µH OUTPUT 5V AT 5A __________________Pin Configuration FRONT VIEW MAX787 VC 2.7k GND 0.01µF SENSE MBR745 470µF MAX787 MAX788 MAX789 5 4 3 2 1 VIN VSW GND VC SENSE 5-PIN TO-220...