Transcription of LTC3789 – High Efficiency, Synchronous, 4-Switch Buck ...
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LTC3789 – High Efficiency, Synchronous, 4-Switch Buck ...
LTC378913789fcFor more information applicaTionFeaTuresapplicaTionsDescripTi onHigh Efficiency, Synchronous, 4-Switch Buck-Boost ControllerThe LT C 3789 is a high performance buck-boost switch-ing regulator controller that operates from input volt-ages above, below or equal to the output voltage. The constant-frequency, current mode architecture allows a phase-lockable frequency of up to 600kHz, while an output current feedback loop provides support for battery charging. With a wide 4V to 38V (40V maximum) input and output range and seamless, low noise transitions between operating regions, the LTC3789 is ideal for automotive, telecom and battery-powered operating mode of the controller is determined through the MODE/PLLIN pin.
UVLO Undervoltage Lockout INTVCC Ramping Down 3.4 3.6 V UVLO Hyst Undervoltage Hysteresis 0.4 V ISENSE + ISENSE – SENSE Pins Current VSENSE – = VSENSE + = 0V 0.2 ±1 µA IIOSENSE + IIOSENSE – IOSENSE Pins Current VIOSENSE – = VIOSENSE + = 10V 10 14 µA ISS Soft-Start Charge Current VSS = 0V 2 3 4 µA VRUN(ON) RUN Pin On-Threshold …
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