ADP1871ARMZ-0.6-R7 datasheet(15/44 Pages) AD

tên linh kiện	ADP1871ARMZ-0.6-R7

Giải thích chi tiết về linh kiện	Synchronous Buck Controller with Constant On-Time and Valley Current Mode

PDF	44 Pages

Scroll/Zoom	100%

nhà sản xuất	AD [Analog Devices]

Trang chủ	http://www.analog.com

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15 / 44 page

ADP1870/ADP1871

Rev. 0 | Page 15 of 44

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

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%

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%

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%

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%

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%

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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