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GM7130HV-ATA5TG Datasheet(PDF) 7 Page - Gamma Microelectronics Inc. |
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GM7130HV-ATA5TG Datasheet(HTML) 7 Page - Gamma Microelectronics Inc. |
7 / 10 page 7 GM7130HV 3A STEP DOWN VOLTAGE SWITCHING REGULATORS Test Circuit and Layout Guidelines Careful layout is important with any switching regulators. Rapidly switching currents associated with wiring inductance generate voltage transients which can cause problems. To minimize inductance and ground loops, the lengths of the leads indicated by heavy lines in Figure 1& 2 below should be kept as short as possible. Single point grounding (as indicated ) or ground plane construction should be used for best results. W hen using the Adjustable version, place the programming resistors as close as possible to GM7130HV, to keep the sensitive feedback wiring short. Figure 1 Fixed Ouput Votlage Versions CIN = 100μF, 75V, Aluminum Electrolytic COUT = 1000μF, 25V, Aluminum Electrolytic D1 = Schottky, MBR360 L1 = 100 μH Figure 2 Adjustable Ouput Votlage Versions CIN = 100μF, 75V, Aluminum Electrolytic COUT = 1000μF, 25V, Aluminum Electrolytic D1 = Schottky L1 = 100 μH VOUT = VREF (1 + R2/R1) where VREF = 1.23V and R1 is between 1K to 5K VIN Unregulatedd DC Input CIN 100μF COUT 100 0μF L1 10 0μH D1 VOUT L O A D 4 Feedback 2 Output 3 GND 1 VIN GM7130HV-x.x VIN Unregulatedd DC Input CIN 100μF COUT 1000 μF L1 10 0μH D1 MBR360 VOUT 5.0V L O A D 4 FB 2 VOUT 3 GND 1 VIN GM7130HV-ADJ R2 R1 5 ON/OFF 5 ON/OFF D1 MBR360 |
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