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ADP1871 Datasheet(PDF) 15 Page - Analog Devices |
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ADP1871 Datasheet(HTML) 15 Page - Analog Devices |
15 / 44 page ![]() ADP1870/ADP1871 Rev. 0 | Page 15 of 44 CH1 10A Ω CH2 200mV B W CH3 20V CH4 5V M10µs A CH1 5.60A T 23.8% 1 2 3 4 OUTPUT VOLTAGE 12A NEGATIVE STEP SW NODE LOW SIDE Figure 52. Negative Step During Heavy Load Transient Behavior—Forced PWM at Light Load, 12 A (See Figure 93 Application Circuit) CH1 2V BW CH2 5A Ω CH3 10V CH4 5V M4ms A CH1 920mV T 49.4% 1 2 3 4 OUTPUT VOLTAGE INDUCTOR CURRENT SW NODE LOW SIDE Figure 53. Output Short-Circuit Behavior Leading to Hiccup Mode CH1 5V BW CH2 10A Ω CH3 10V CH4 5V M10µs A CH2 8.20A T 36.2% 1 2 3 4 OUTPUT VOLTAGE INDUCTOR CURRENT SW NODE LOW SIDE Figure 54. Magnified Waveform During Hiccup Mode CH1 2V BW CH2 5A Ω CH3 10V CH4 5V M2ms A CH1 720mV T 32.8% 1 2 3 4 OUTPUT VOLTAGE INDUCTOR CURRENT SW NODE LOW SIDE Figure 55. Start-Up Behavior at Heavy Load, 12 A, 300 kHz (See Figure 93 Application Circuit) CH1 2V BW CH2 5A Ω CH3 10V CH4 5V M4ms A CH1 720mV T 41.6% 1 2 3 4 OUTPUT VOLTAGE INDUCTOR CURRENT SW NODE LOW SIDE Figure 56. Power-Down Waveform During Heavy Load CH1 50mV BW CH2 5A Ω CH3 10V BW CH4 5V M2µs A CH2 3.90A T 35.8% 1 2 3 4 OUTPUT VOLTAGE INDUCTOR CURRENT SW NODE LOW SIDE Figure 57. Output Voltage Ripple Waveform During PSM Operation at Light Load, 2 A |
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