LT1268CT#PBF

LT1268CT#PBF is a monolithic high power switching regulator. Identical to the popular LT1070, except for switching frequency (150KHz) and higher switch current, they can be operated in all standard switching configurations including buck, boost, flyback, and inverting. A high current, high efficiency switch is included on the die along with all oscillator, control, and protection circuitry. Integration of all functions allows the LT1268 to be built in standard 5-pin power packages. This makes it extremely easy to use and provides “bust proof” operations similar to that obtained with 3-pin linear regulators. The LT1268 operate with supply voltages from 3.5V to 30V and draw only 7mA quiescent current. By utilizing current mode switching techniques, it provides excellent AC and DC load and line regulation. Applications include high efficiency boost converter, PC power supply with multiple outputs, battery upconverter, negative-to-positive converter.

• Wide input voltage range from 3.5V to 30V, self-protected against overloads
• Switch current limit is 15A maximum at (duty cycle = 50%, TJ ≤ 100°C)
• Feedback input current is 350nA typical at (VFB = VREF)
• Error amplifier voltage gain is 800V/V typical at (0.9V ≤ VC ≤ 1.4V)
• Supply current is 5mA typical at (3V ≤ VIN ≤ VMAX, VC = 0.6V)
• Output switch-ON resistance is 0.12 ohm typical at (TJ ≤ 100°C)
• Switching frequency is 150KHz typical at (VIN = 15V, VC = 0.5V, VFB = VREF)
• Maximum switch duty cycle is 85% typical at (VIN = 15V, VC = 0.5V, VFB = VREF)
• Operating temperature range from 0°C to 125°C
• 5-lead TO-220 package

Notes

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