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ADP2139 数据表(PDF) 10 Page - Analog Devices

部件名 ADP2139
功能描述  Compact, 800 mA, 3 MHz, Step-Down DC-to-DC Converter
PDF  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADP2139 数据表(HTML) 10 Page - Analog Devices

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ADP2138/ADP2139
Data Sheet
Rev. C | Page 10 of 20
CH1
1.00V Ω
CH4 5.00V
CH2 500mA Ω
M 40.0µs
A CH3
2.50V
T 10.40%
CH3 5.00V
T
4
1
1
1
3
2
SW
VOUT
IIN
EN
Figure 27. Startup, VOUT = 0.8 V, IOUT = 10 mA
CH1
5.00V Ω
CH4 5.00V
CH2 500mA Ω
M 40.0µs
A CH3
2.50V
T 10.40%
CH3 5.00V
T
4
1
1
1
3
2
SW
VOUT
IIN
EN
Figure 28. Startup, VOUT = 3.3 V, IOUT = 10 mA
T
4
4
1
1
2
A CH1
3.80mV
M 1.00µs
T 50.00%
CH1 10.0mV
Ω
CH4 2.00V
CH2
500mA Ω
SW
VOUT
IL
Figure 29. Typical Waveform, VOUT = 1.8 V, PSM Mode, IOUT = 10 mA
T
4
1
1
2
A CH4
1.32V
M 40.0µs
T 50.00%
CH1 10.0mV
Ω
CH2 500mA
Ω
CH4 2.00V
SW
VOUT
IL
Figure 30. Typical Waveform, VOUT = 1.8 V, PWM Mode, IOUT = 200 mA
CH1 100mV
CH4 2.00V
M 40.0µs
A CH3
1.36V
T 29.60%
CH3 2.00V
T
4
1
1
1
3
SW
MODE
VOUT
Figure 31. Mode Transition from PSM to PWM to PSM, VOUT = 1.8 V
130
120
100
110
90
80
70
60
50
40
30
20
10
0
0.001
0.01
0.1
1
IOUT (A)
1.8V, VIN = 5.5V, AUTO
1.8V, VIN = 3.6V, AUTO
1.8V, VIN = 2.3V, AUTO
1.8V, VIN = 5.5V, PWM
1.8V, VIN = 3.6V, PWM
1.8V, VIN = 2.3V, PWM
Figure 32. VOUT Peak-to-Peak Ripple vs. Output Current, VOUT = 1.8 V



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