MAX727 Datasheet | Maxim Integrated

Description The MAX727/MAX728/MAX729 are monolithic, bipolar, pulse-width modulation (PWM), switch-mode, step-down DC-DC regulators. Each is rated at 2A. 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. These regulators have excellent dynamic and transient response characteristics, while featuring cycle-by-cycle current limiting to protect against overcurrent faults and shortcircuit 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 2.6A. See the MAX724/ MAX726 data sheet for more applications information. ___________________________Features o Input Range: Up to 40V o 2A On-Chip Power Switch o Fixed Outputs: 5V (MAX727) 3.3V (MAX728) 3V (MAX729) o 100k Hz Switching Frequency o Excellent Dynamic Characteristics o Few External ponents o 8.5m A Quiescent Current o TO-220 Package MAX727/MAX728/MAX729 ______________Ordering Information PART MAX727CCK MAX727ECK MAX728CCK MAX728ECK MAX729CCK MAX729ECK 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 Applications Multiple-Output Buck Converter __________Typical Operating Circuit __________________Pin Configuration FRONT VIEW INPUT 8V TO 40V VIN 220µF VSW 100µH OUTPUT 5V AT 2A VC 2.7k GND 0.01µF SENSE MBR745 470µF MAX727 MAX728 MAX729 5 4 3 2 1 VIN VSW GND VC SENSE 5-PIN TO-220 CASE IS CONNECTED TO GROUND. STANDARD PACKAGE HAS STAGGERED LEADS. CONTACT FACTORY FOR STRAIGHT LEADS. STEP-DOWN...