Features: · Input Range: Up to 40V
· 5A On-Chip Power Switch (MXL1074)
2A On-Chip Power Switch (MXL1076)
· Adjustable Output: 2.5V to 35V
· 100kHz Switching Frequency
· Excellent Dynamic Characteristics
· Few External Components
· 8.5mA Quiescent Current
· TO-220 PackageApplication·Distributed Power from High-Voltage Buses
·High-Current, High-Voltage Step-Down Applications
·High-Current Inverter
·Negative Step-Up Converter
·Multiple-Output Step-Down Converter
·Isolated DC-DC ConversionPinout
SpecificationsInput Voltage .......................................................................45V
Switch Voltage with Respect to Input Voltage .....................50V
Switch Voltage with Respect to Ground Pin (VSW negative)
(Note 1) .............................................................................35V
Feedback Pin Voltage ...............................................-0.3V, +10V
Operating Temperature Ranges
MXL1074CT/MXL1076CT ...................................0°C to +70°C
MXL1074ET/MXL1076ET ................................-40°C to +85°C
Junction Temperature Ranges
MXL1074CT/MXL1076CT .................................0°C to +125°C
MXL1074ET/MXL1076ET ..............................-40°C to +125°C
Storage Temperature Range ..........................-65°C to +160°C
Lead Temperature (soldering, 10sec) ............................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe 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.
MXL1074 Data Sheet
