ADP2105_15 datasheet(10/36 Pages) AD

Part #	ADP2105

Description	1 Amp/1.5 Amp/2 Amp Synchronous, Step-Down DC-to-DC Converters

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Manufacturer	AD [Analog Devices]

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10 / 36 page

ADP2105/ADP2106/ADP2107

Data Sheet

Rev. D | Page 10 of 36

10k

1

0.8

INPUT VOLTAGE (V)

10

100

1k

1.2

1.6

2.0

2.4

2.8

3.2

3.6

4.0

4.4

4.8

5.2

–40°C

+125°C

+25°C

Figure 17. Quiescent Current vs. Input Voltage

–40

125

TEMPERATURE (°C)

–20

0

20

40

60

80

100

120

0.795

0.796

0.797

0.798

0.799

0.800

0.801

0.802

Figure 18. Feedback Voltage vs. Temperature

1.75

1.25

2.7

5.7

INPUT VOLTAGE (V)

1.70

1.65

1.60

1.55

1.50

1.45

1.40

1.35

1.30

3.0

3.3

3.6

3.9

4.2

4.5

4.8

5.1

5.4

ADP2105 (1A)

TA = 25°C

Figure 19. Peak Current Limit of ADP2105

190

180

170

160

150

140

130

120

110

100

2.7

3.0

3.3

3.6

3.9

4.2

4.5

5.1

5.4

4.8

INPUT VOLTAGE (V)

PMOS POWER SWITCH

NMOS SYNCHRONOUS RECTIFIER

Figure 20. Switch On Resistance vs. Input Voltage—ADP2105

120

0

2.7

5.4

INPUT VOLTAGE (V)

100

80

60

40

20

3.0

3.3

3.6

3.9

4.2

4.5

4.8

5.1

NMOS SYNCHRONOUS RECTIFIER

PMOS POWER SWITCH

TA = 25°C

Figure 21. Switch On Resistance vs. Input Voltage—ADP2106 and ADP2107

1260

1190

2.7

5.4

INPUT VOLTAGE (V)

1250

1240

1230

1220

1210

1200

3.0

3.3

3.6

3.9

4.2

4.5

4.8

5.1

–40°C

+25°C

+125°C

Figure 22. Switching Frequency vs. Input Voltage

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