ADP1879ACPZ-1.0-R7 datasheet(15/40 Pages) AD

15 / 40 page

Data Sheet

ADP1878/ADP1879

Rev. A | Page 15 of 40

Figure 52. Negative Step During Heavy Load Transient Behavior—Forced PWM

at Light Load, 12 A (See Figure 95 Application Circuit)

Figure 53. Output Short-Circuit Behavior Leading to Hiccup Mode

Figure 54. Magnified Waveform During Hiccup Mode

Figure 55. Start-Up Behavior at Heavy Load, 12 A, 300 kHz

(See Figure 95 Application Circuit)

Figure 56. Power-Down Waveform During Heavy Load

Figure 57. Output Voltage Ripple Waveform During PSM Operation

at Light Load, 2 A

CH1 10A Ω

CH2 200mV

CH3 20V

CH4 5V

M10µs

A CH1

5.60A

T 23.8%

OUTPUT VOLTAGE

12A NEGATIVE STEP

SW NODE

LOW

SIDE

CH1 2V BW CH2 5A Ω

CH3 10V

CH4 5V

M4ms

A CH1

920mV

T 49.4%

OUTPUT VOLTAGE

INDUCTOR CURRENT

SW NODE

LOW SIDE

CH1 5V BW CH2 10A Ω

CH3 10V

CH4 5V

M10µs

A CH2

8.20A

T 36.2%

OUTPUT VOLTAGE

INDUCTOR CURRENT

SW NODE

LOW SIDE

CH1 2V BW CH2 5A Ω

CH3 10V

CH4 5V

M2ms

A CH1

720mV

T 32.8%

OUTPUT VOLTAGE

INDUCTOR CURRENT

SW NODE

LOW SIDE

CH1 2V BW CH2 5A Ω

CH3 10V

CH4 5V

M4ms

A CH1

720mV

T 41.6%

OUTPUT VOLTAGE

INDUCTOR CURRENT

SW NODE

LOW SIDE

CH1 50mV BW CH2 5A Ω

CH3 10V BW

CH4 5V

M2µs

A CH2

3.90A

T 35.8%

OUTPUT VOLTAGE

INDUCTOR CURRENT

SW NODE

LOW SIDE

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