CMPWR150 Просмотр технического описания (PDF) - ON Semiconductor

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CMPWR150

500mA/3.3V SmartOR™ Power Regulator

ON Semiconductor 

VOUT offset = 3.3V, VCC offset = 4.3V

PowerUpVa ux30v. bmp

CMPWR150

Figure 8. VCC Power-up (VAUX = 3.0V)

VCC Power-down (VAUX = 3.3V). Figure 9 shows the output response as VCC approaches the deselect threshold

during a power-down transition. VAUX of 3.3V remains present. When VCC reaches the deselect threshold (4.1V),

the regulator turns off. This causes a step change reduction in VCC current resulting in a small voltage increase

at the VCC input. This disturbance is approximately 100mV and the built-in hysteresis of 250mV ensures the

regulator remains disabled throughout the transient. The output voltage experiences a disturbance of

approximately 100mV during the transition.

VOUT offset = 3.3V, VCC offset = 4.3V

PowerDwnVa ux33v. bmp

Figure 9. VCC Power-down (VAUX = 3.3V)

Load Step Response. Figure 10 shows the output response of the regulator during a step load change from

5mA to 500mA (represented on Ch1). An initial transient overshoot of 50mV occurs and the output settles to its

final voltage within a few microseconds. The dc voltage disturbance on the output is approximately 75mV,

which demonstrates the regulator output impedance of 0.15Ω.

VOUT offset = 3.3V

Rev. 3 | Page 10 of 15 | www.onsemi.com

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