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CMPWR150 Datasheet(PDF) 9 Page - ON Semiconductor |
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CMPWR150 Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 15 page CMPWR150 Rev. 3 | Page 9 of 15 | www.onsemi.com Figure 6. Transient Characteristics Test Set-up V CC Power-up (VAUX = 3.3V). Figure 7 shows the output response as V CC approaches the select threshold during a power-up when V AUX is present (3.3V). The output capacitor is already fully charged. When VCC reaches the select threshold, the in-rush current is minimal and the V CC disturbance is only 130mV. The built-in hysteresis of 250mV ensures the regulator remains enabled throughout the transient. V OUT offset = 3.3V, V CC offset = 4.3V PowerUpVaux33v.bmp Figure 7. V CC Power-up (VAUX = 3.3V) V CC Power-up (VAUX =3.0V). Figure 8 shows the output response as V CC approaches the select threshold during power-up. The auxiliary voltage, V AUX is set to a low level of 3.0V. When VCC reaches the select threshold, a modest level of in-rush current is required to further charge the output capacitor resulting in V CC disturbance of 200mV. The built-in hysteresis of 250mV ensures the regulator remains enabled throughout the transient. |
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