ADP1870ACPZ-0.3-R7 Analog Devices Inc, ADP1870ACPZ-0.3-R7 Datasheet - Page 15

• Manufacturer Part Number: ADP1870ACPZ-0.3-R7
• Description: 300kHz, Light Load Eff Enabled
• Manufacturer: Analog Devices Inc

Specifications of ADP1870ACPZ-0.3-R7

• Frequency - Max: 300kHz
• Pwm Type: Current Mode
• Number Of Outputs: 1
• Duty Cycle: 84%
• Voltage - Supply: 2.95 V ~ 20 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 10-WFDFN, CSP Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ADP1870ACPZ-0.3-R7; ADP1870ACPZ-0.3-R7TR

Figure 52. Negative Step During Heavy Load Transient Behavior—Forced PWM
Figure 53. Output Short-Circuit Behavior Leading to Hiccup Mode
2
1
3
4
1
2
4
3
1
2
3
4
CH1 10A Ω
CH3 20V
CH1 2V
CH3 10V
CH1 5V
CH3 10V
INDUCTOR CURRENT
OUTPUT VOLTAGE
at Light Load, 12 A (See Figure 94 Application Circuit)
Figure 54. Magnified Waveform During Hiccup Mode
SW NODE
SW NODE
LOW SIDE
B
B
W
W
LOW
SIDE
CH2 200mV
CH4 5V
CH2 5A Ω
CH4 5V
CH2 10A Ω
CH4 5V
B
W
M10µs
M4ms
M10µs
T
T
T
12A NEGATIVE STEP
OUTPUT VOLTAGE
23.8%
49.4%
36.2%
INDUCTOR CURRENT
OUTPUT VOLTAGE
LOW SIDE
SW NODE
A CH1
A CH1
A CH2
920mV
5.60A
8.20A
Rev. A | Page 15 of 44
Figure 57. Output Voltage Ripple Waveform During PSM Operation
1
2
4
3
1
2
4
3
1
2
3
4
Figure 55. Start-Up Behavior at Heavy Load, 12 A, 300 kHz
CH1 2V
CH3 10V
CH1 2V
CH3 10V
CH1 50mV
CH3 10V
Figure 56. Power-Down Waveform During Heavy Load
OUTPUT VOLTAGE
LOW SIDE
SW NODE
B
B
W
W
B
W
B
(See Figure 94 Application Circuit)
W
CH2 5A Ω
CH4 5V
CH2 5A Ω
CH4 5V
CH2 5A Ω
CH4 5V
INDUCTOR CURRENT
OUTPUT VOLTAGE
at Light Load, 2 A
LOW SIDE
SW NODE
OUTPUT VOLTAGE
INDUCTOR CURRENT
LOW SIDE
SW NODE
M2ms
M4ms
M2µs
T
T
T
ADP1870/ADP1871
32.8%
41.6%
35.8%
INDUCTOR CURRENT
A CH1
A CH1
A CH2
720mV
720mV
3.90A