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 components 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 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 100kHz oscillator frequency and a preset current limit of 2.6A. See the MAX724/ MAX726 data sheet for more applications information. Applications * Distributed Power from High-Voltage Buses * High-Current, High-Voltage Step-Down Applications * Multiple-Output Buck Converter * Input Range: Up to 40V * 2A On-Chip Power Switch * Fixed Outputs: * 5V (MAX727) * 3.3V (MAX728) * 3V (MAX729) * 100kHz Switching Frequency * Excellent Dynamic Characteristics * Few External Components * 8.5mA Quiescent Current * TO-220 Package