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SGM2006-2.7 Datasheet(PDF) 9 Page - SG Micro Corp |
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SGM2006-2.7 Datasheet(HTML) 9 Page - SG Micro Corp |
9 / 11 page SGM2006/A 9 Application Notes When LDO is used in handheld products, Attention must be paid to voltage spike which would damage SGM2006. In such applications, voltage spike will be generated at changer interface and VBUS pin of USB interface when changer adapters and USB equipments are hot-inserted. Besides this, handheld products will be tested on the production line on the condition of no battery. Test Engineer will apply power from the connector pin which connects with positive pole of the battery. When external power supply is turned on suddenly, the voltage spike will be generated at the battery connector. The voltage spike will be very high, it always exceeds the absolute maximum input voltage (6.0V) of LDO. In order to get robust design. Design Engineer needs to clear up this voltage spike. Zener diode is a cheap and effective solution to eliminate such voltage spike. For example, BZM55B5V6 is a 5.6V small package Zener diode which can be used to remove voltage spike in cell phone design. The schematic is shown in below: SGM2006 4 4.7uF VOUT 2 1 Vcc Input EN GND BP/FP IN Control 3 5 VOUT C2 0.01uF C1 1uF BZM55B5V6 |
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