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HM1483C データシート(PDF) 5 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

部品番号 HM1483C
部品情報  Wide Range Synchronous Buck Controller
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メーカー  HMSEMI [Shenzhen Huazhimei Semiconductor Co., Ltd]
ホームページ  http://www.hmsemi.com/
Logo HMSEMI - Shenzhen Huazhimei Semiconductor Co., Ltd

HM1483C データシート(HTML) 5 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

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Pin Functions
FB (Pin 1): Feedback Pin. Receive the feedback voltage from an external resistive divider across the out-
put. In the adjustable version, the output voltage is fixed. The Output voltage is set by R2 and R3:
VOUT = 1.21V • [1 + (R2/R3)].
RT (Pin 2): The internal oscillator is set with a single resistor between this pin and the GND pin.
ILIM (Pin 3): Monitors current through the low-side switch and triggers current limit operation if the inductor
valley current exceeds a user defined value that is set by RLIM and the Sense current sourced out of this pin
during operation.
VIN (Pin 4): Main Supply Pin. The
operates from 8V to 30V unregulated input. It must be closely
decoupled to GND, with a 100μF or greater ceramic capacitor to prevent large voltage spikes from appear-
ing at the input.
SW (Pin 5, 6): Switch Node Connection to Inductor.
GND (Pin 7, 8): Ground Pin.
Block Diagram
HM1483C


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