ADP1621(RevB) 查看數據表（PDF） - Analog Devices

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ADP1621
(Rev.:RevB)

Constant-Frequency, Current-Mode Step-Up DC/DC Controller

Analog Devices 

Data Sheet

TA = 25°C LOAD = 0.3A

VIN = 3.3V CCM OPERATION

VOUT = 5V

4

CH4 = INDUCTOR CURRENT

2

CH2 = DRAIN VOLTAGE

1

CH1 = GATE

CH1 5V

CH2 5V

M2µs

CH4 500mAΩ

A CH1 2.9V

Figure 23. CCM Switching Waveform

TA = 25°C

VIN = 3.3V

VOUT = 5V

fSW = 220kHz

SOFT-START = 9.3ms

CH1 = VOUT

2

1

3

CH1 1V

CH3 5V

CH2 = SDSN

CH2 5V

M2ms

CH3 = GATE

A CH1 4.5V

Figure 24. Soft Start Waveform

ADP1621

LOAD CURRENT

FROM 0.2A TO 1.2A

4

1

OUTPUT, AC-COUPLED

TA = 25°C

VIN = 3.3V

VOUT = 5V

CH1 50mV

CH4 1AΩ

M200µs

A CH4 700V

Figure 26. Load Transient Response of the Circuit Shown in Figure 1

TA = 25°C

VOUT = 5V

NO LOAD AT VOUT

1

CH1 = VOUT, AC-COUPLED

CH2 = VIN FROM 3V TO 4V

2

CH1 50mV CH2 2V

M400µs

A CH2 3.8V

Figure 27. Line Transient Response of the Configuration Shown in Figure 1

with No Load

TA = 25°C

VOUT = 5V

LOAD AT VOUT = 1A

1

CH1 = VOUT, AC-COUPLED

CH2 = VIN FROM 3V TO 4V

2

CH1 50mV CH2 2V

M400µs

A CH2 3.8V

Figure 25. Line Transient Response of the Configuration Shown in Figure 1

with a 1 A Load

Rev. B | Page 11 of 32

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