LTC3708EUH#PBF
数据手册.pdfLINEAR TECHNOLOGY LTC3708EUH#PBF 直流/直流控制器, 2相, 4.5V至36V, 2路输出, 同步降压, QFN-32
The is a 2-phase dual synchronous step-down Switching Regulator with output voltage up/down tracking capability. The IC allows either coincident or ratiometric tracking. Multiple LTC3708s can be daisy-chained in applications requiring more than two voltages to be tracked. Power supply sequencing is accomplished using an external soft-start timing capacitor. The LTC3708 uses a constant on-time, valley current-mode control architecture to deliver very low duty factors without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in input supply voltage. An internal phase-locked loop allows the IC to be synchronized to an external clock. Fault protection is provided by an output overvoltage comparator and an optional short-circuit shutdown timer. The regulator current limit level is user programmable. A wide supply range allows voltages as high as 36V to be stepped down to 0.6V output.
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- Very fast transient response
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- Programmable output voltage up/down tracking
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- 2-phase operation reduces input capacitance
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- 0.6V ±1% Output voltage reference
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- External frequency synchronization
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- Monotonic soft-start
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- Onboard high current MOSFET drivers
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- Adjustable cycle-by-cycle current limit
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- Instant output overvoltage protection
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- Optional short-circuit shutdown timer
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- Power good output with 100µs Masking