sc2677 Semtech Corporation, sc2677 Datasheet
sc2677
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sc2677 Summary of contents
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... POWER MANAGEMENT Description The SC2677 is a versatile 2 phase, synchronous, volt- age mode PWM controller that may be used in two dis- tinct ways. First, the SC2677 is ideal for applications where point of use output power exceeds any single in- put power budget. Alternatively, the SC2677 can be used as a dual switcher ...
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... Pin 19: (PWRGD) Power good signal. This is an open collector output pulled low internally if output voltage is outside the power good window. Pin 20: (GND) Analog GND. Return of the analog signals and bias of the chip. 4 SC2677 ...
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... POWER MANAGEMENT Block Diagram NOTES (1) Channel 1 is the Master and Channel 2 is the Slave in current sharing configuration. (2) For dual output operation, tie +IN2 to VREF and the two PWM channels are independent. © 2004 Semtech Corp. 1.25V 50uA 5 SC2677 www.semtech.com ...
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... POWER MANAGEMENT Evaluation Schematic 2 Channels with Current Sharing 2 Channels with Current Sharing 2 Channels with Current Sharing 2 Channels with Current Sharing 2 Channels with Current Sharing © 2004 Semtech Corp. 6 SC2677 www.semtech.com ...
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... Main Loop(s) Main Loop(s) Main Loop(s) Main Loop(s) The SC2677 is a dual, voltage mode synchronous Buck controller. The two separate channels are identical and share only IC supply pins (Vcc and GND), output driver ground (PGND) and pre-driver supply voltage (BSTC). They also share a common oscillator generating a sawtooth waveform for channel 1 and an dephased sawtooth for channel 2 ...
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... The IC must have a ceramic decoupling capacitor across its supply pins, mounted as close to the device as possible. The small ceramic, noise-filtering capacitors on the current sense lines should also be placed as close to the IC as possible. 8 SC2677 www.semtech.com ...
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... Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 9 SC2677 ...