MXL1074

19-0102; Rev 3; 9/95 5A/2A Step-Down, PWM, Switch-Mode DC-DC Regulators _______________General Description The MXL1074/MXL1076 are monolithic, bipolar, pulsewidth modulation (PWM), switch-mode DC-DC regulators optimized for step-down applications. The MXL1074 is rated at 5A, while the MXL1076 is rated at 2A. Few external components 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 step-down functions, but can also be configured as an inverter, a negative boost converter, or a flyback converter. The regulators have excellent dynamic and transientresponse characteristics, while featuring cycle-by-cycle current limiting to protect against overcurrent faults and short-circuit output faults. The MXL1074/MXL1076 also have a wide 8V to 40V input range in the step-down configuration. In inverting and step-up configurations, the input can be as low as 5V. The MXL1074/MXL1076 are available in a 5-pin TO-220 package. The devices have a preset 100kHz oscillator frequency and a preset current limit of 6.5A for the MXL1074, and 2.6A for the MXL1076. The MXL1074/ MXL1076 are pin compatible with the LT1074/LT1076. ____________________________Features o Input Range: Up to 40V o 5A On-Chip Power Switch (MXL1074) 2A On-Chip Power Switch (MXL1076) o Adjustable Output: 2.5V to 35V o 100kHz Switching Frequency o Excellent Dynamic Characteristics o Few External Com...