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AS1345A Datasheet(PDF) 4 Page - ams AG |
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AS1345A Datasheet(HTML) 4 Page - ams AG |
4 / 29 page AS1345 – 4 ams Datasheet, Confidential: 2013-Nov [1-51] P i n Assi gnments Figure 4: Pin Assignments (Top View) Figure 5: Pin Descriptions Pin Number Pin Name Description TDFN WLP 1A1 VDD Supply Voltage. Connect to a 2.9V to 5.0V input supply. Bypass this pin with a 10μF capacitor. 2A2 EN Enable Pin. Logic controlled shutdown input, 1.8V CMOS compatible; 1 = Normal operation 0 = Shutdown On request a 100k Ω pull-down resistor can be enabled (factory set). 3A3 FB Feedback Pin. Feedback input to the gm error amplifier. For an adjustable output voltage connect a resistor divider to this pin. The output can be adjusted from 5.0V to 18V by: VOUT = VREF x (1 + R2/R3) If the fixed output voltage version is used, connect this pin to VOUT. 4A4 POK POK. Open Drain Output. POK remains low while VOUT is less than 90% of nominal VOUT. Connect a 100k Ω pull-up resistor from this pin to VDD. 5B4 SWIN Shutdown Disconnect Switch In. Input pin of the internal P-channel MOSFET. Pin Assignments 1 2 3 4 AS1345 TDFN 8-pin 2x2mm LX GND VDD EN FB POK SWOUT SWIN A1 VDD B3 SWOUT A4 POK A3 FB A2 EN B2 LX B1 GND Pin A1 indicator B4 SWIN 8 7 6 5 |
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