MC34063A

DC- TO- DC转换器控制电路 DC-to-DC CONVERTER CONTROL CIRCUITS

The Series is a monolithic control circuit containing the primary functions required for dc-to-dc converters. These Buck Boost Inverting Switching Regulators consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series was specifically designed to be incorporated in Step down Buck, Step up Boost and Voltage-Inverting applications with a minimum number of external components. Refer to Application Notes AN920A/D and AN954/D for additional design information. The MC33063 is an extended temperature version. The NCV33063 is an extended temp version for automotive.

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Operation from 3.0 V to 40 V Input

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Wide input voltage range usable for many applications

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Low Standby Current

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<100uA Collector Off-State Current

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Current Limiting

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Adjustable current limit provides improved protection

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Output Switch Current to 1.5 A

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Large 1.5A peak current capability provides up to ~1A of average current output

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Output Voltage Adjustable

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External resistor divider for various output voltage options

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Frequency Operation to 100 kHz

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Optimize frequency for size or efficiency

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Precision 2% Reference

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Accurate system level performance

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4x4mm DFN package option

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Exposed pad package allows for higher output current and improved thermal performance

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**MC34063A = 0 to +70degC******

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**MC33063A = -40 to +85degC******

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**MC33063AV / NCV33063A = -40 to +125degC******

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