ADP2107 Analog Devices, ADP2107 Datasheet - Page 12

• Manufacturer Part Number: ADP2107
• Description: 2 Amp Synchronous, Step-Down DC-to-DC Converter
• Manufacturer: Analog Devices

ADP2105/ADP2106/ADP2107
Figure 30. Switch On Resistance vs. Temperature—ADP2106 and ADP2107
3
4
1
Figure 31. PFM Mode of Operation at Very Light Load (10 mA)
190
180
170
160
150
140
130
120
110
100
Figure 29. Switch On Resistance vs. Temperature—ADP2105
140
120
100
80
60
40
20
CH1
CH3 2V
2.7
0
–40
OUTPUT VOLTAGE (AC-COUPLED)
INDUCTOR CURRENT
NMOS SYNCHRONOUS RECTIFIER
50mV
3.0
–20
CH4 200mAΩ
3.3
PMOS POWER SWITCH
0
JUNCTION TEMPERATURE (°C)
PMOS POWER SWITCH
3.6
INPUT VOLTAGE (V)
NMOS SYNCHRONOUS RECTIFIER
20
LX (SWITCH)
3.9
NODE
M 2µs
T
40
6%
4.2
60
4.5
A CH3
80
4.8
100
5.1
3.88V
120
5.4
Rev. C | Page 12 of 36
Figure 34. PWM Mode of Operation at Medium/Heavy Load (1.5 A)
3
4
3
4
3
4
1
1
1
Figure 32. DCM Mode of Operation at Light Load (100 mA)
CH1
CH3 2V
CH1
CH3 2V
CH1
CH3 2V
Figure 33. Minimum Off Time Control at Dropout
50mV
20mV
20mV
CH4 200mAΩ
CH4 1AΩ
CH4 1AΩ
OUTPUT VOLTAGE (AC-COUPLED)
OUTPUT VOLTAGE (AC-COUPLED)
OUTPUT VOLTAGE (AC-COUPLED)
INDUCTOR CURRENT
INDUCTOR CURRENT
INDUCTOR CURRENT
LX (SWITCH) NODE
LX (SWITCH) NODE
LX (SWITCH) NODE
M 400ns
M 2µs
M 1µs
T
T
T
17.4%
13.4%
17.4%
A CH3
A CH3
A CH3
3.88V
1.84V
3.88V