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LTC1872 - Constant Frequency Current Mode Step-Up DC/DC Controller

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Full PDF Text Transcription

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LTC1872 Constant Frequency Current Mode Step-Up DC/DC Controller in SOT-23 FEATURES s s s s s s s DESCRIPTIO s s s s High Efficiency: Over 90% High Output Currents Easily Achieved Wide VIN Range: 2.5V to 9.8V VOUT Limited Only by External Components Constant Frequency 550kHz Operation Burst ModeTM Operation at Light Load Current Mode Operation for Excellent Line and Load Transient Response Low Quiescent Current: 270µA Shutdown Mode Draws Only 8µA Supply Current ± 2.5% Reference Accuracy Tiny 6-Lead SOT-23 Package The LTC®1872 is a constant frequency current mode stepup DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage lockout feature that shuts down the LTC1872 when the input voltage falls below 2.0V.
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