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EP3102-S50B Datasheet(PDF) 2 Page - Eorex Corporation |
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EP3102-S50B Datasheet(HTML) 2 Page - Eorex Corporation |
2 / 10 page eorex EP3102 Nov. 2006 www.eorex.com 2/10 Pin Assignment Ordering Information Buck Regulator Package VOUT Packing EP3102 -X X X S : SOP-8L Blank: Adj 50 = 5.0V 33 = 3.3V 12 = 12V R: Taping & Reel B: Bag Pin Description Pin Name Function 1 VIN This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply the switching currents needed by the regulator. 2 SW Internal switch. The voltage at this pin switches between (+VIN-VSAT) and approximately-0.5V, with a duty cycle of approximately VOUT/VIN. To minimize coupling to sensitive circuitry, the PC board copper area connected to this pin should be kept a minimum. 3 FB Senses the regulated output voltage to complete the feedback loop. 4 EN Low enable. Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply current to approximately 150uA. Pulling this pin below a threshold voltage of approximately 1.3V turns the regulator on, and pulling this pin above 1.3V (up to a maximum of 40V) shuts the regulator down. If this shutdown feature is not needed, the EN pin can be wired to the ground pin or it can be left open, in either case the regulator will be in the ON condition. 5~8 GND Circuit ground. |
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