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LM4040 Arkusz danych(PDF) 8 Page - Diodes Incorporated |
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LM4040 Arkusz danych(HTML) 8 Page - Diodes Incorporated |
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8 / 10 page  LM4040 LM4040 Document number: DS33195 Rev. 5 - 2 8 of 10 www.diodes.com November 2010 © Diodes Incorporated A Product Line of Diodes Incorporated Application Information In a conventional shunt regulator application (Figure 1), an external series resistor (RS) is connected between the supply voltage, VS, and the LM4040. RS determines the current that flows through the load (IL) and the LM4040 (IR). Since load current and supply voltage may vary, RS should be small enough to supply at least the minimum acceptable IR to the LM4040 even when the supply voltage is at its minimum and the load current is at its maximum value. When the supply voltage is at its maximum and IL is at its minimum, RS should be large enough so that the current flowing through the LM4040 is less than 15 mA. RS is determined by the supply voltage, (VS), the load and operating current, (IL and IR), and the LM4040’s reverse breakdown voltage, VR. R L R S S I I V V R + − = Printed circuit board layout considerations LM4040s in the SOT23 package have the die attached to pin 1, which results in an electrical contact between pin 2 and pin 3. Therefore, pin 1 of the SOT-23 package must be left floating or connected to pin 2. LM4040s in the SC70-5 package have the die attached to pin 2, which results in an electrical contact between pin 2 and pin 1. Therefore, pin 2 must be left floating or connected to pin1. Ordering Information 25°C Tol Voltage (V) Order Code Package Part Mark Reel Size Tape Width Quantity per Reel 0.2% 2.5 LM4040B25FTA SOT23 R2B 7”, 180mm 8mm 3000 LM4040B25H5TA SC70-5 R2B 7”, 180mm 8mm 3000 3.0 LM4040B30FTA SOT23 R3B 7”, 180mm 8mm 3000 LM4040B30H5TA SC70-5 R3B 7”, 180mm 8mm 3000 5.0 LM4040B50FTA SOT23 R5B 7”, 180mm 8mm 3000 LM4040B50H5TA SC70-5 R5B 7”, 180mm 8mm 3000 0.5% 2.5 LM4040C25FTA SOT23 R2C 7”, 180mm 8mm 3000 LM4040C25H5TA SC70-5 R2C 7”, 180mm 8mm 3000 3.0 LM4040C30FTA SOT23 R3C 7”, 180mm 8mm 3000 LM4040C30H5TA SC70-5 R3C 7”, 180mm 8mm 3000 5.0 LM4040C50FTA SOT23 R5C 7”, 180mm 8mm 3000 LM4040C50H5TA SC70-5 R5C 7”, 180mm 8mm 3000 1% 2.5 LM4040D25FTA SOT23 R2D 7”, 180mm 8mm 3000 LM4040D25H5TA SC70-5 R2D 7”, 180mm 8mm 3000 3.0 LM4040D30FTA SOT23 R3D 7”, 180mm 8mm 3000 LM4040D30H5TA SC70-5 R3D 7”, 180mm 8mm 3000 5.0 LM4040D50FTA SOT23 R5D 7”, 180mm 8mm 3000 LM4040D50H5TA SC70-5 R5D 7”, 180mm 8mm 3000 RS VS IR + IL IR IL VR |
Podobny numer części - LM4040 |
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Podobny opis - LM4040 |
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