Datasheet

ADP2105/ADP2106/ADP2107 Data Sheet
Rev. D | Page 12 of 36
190
180
170
160
150
140
130
120
110
100
SWITCH ON RESISTANCE (mΩ)
2.7 3.0 3.3 3.6 3.9 4.2 4.5 5.1 5.44.8
INPUT VOLTAGE (V)
PMOS POWER SWITCH
NMOS SYNCHRONOUS RECTIFIER
06079-093
Figure 29. Switch On Resistance vs. Temperature—ADP2105
–40
06079-083
JUNCTION TEMPERATURE (°C)
SWITCH ON RESISTANCE (mΩ)
–20
0 20 40
60
80 100 120
0
20
40
60
80
100
120
140
PMOS POWER SWITCH
NMOS SYNCHRONOUS RECTIFIER
Figure 30. Switch On Resistance vs. Temperature—ADP2106 and ADP2107
06079-030
CH1 50mV
6%CH4 200mAΩCH3 2V
M 2µs A CH3 3.88V
T
3
4
1
INDUCTOR CURRENT
OUTPUT VOLTAGE (AC-COUPLED)
LX (SWITCH)
NODE
Figure 31. PFM Mode of Operation at Very Light Load (10 mA)
06079-033
CH1 50mV
17.4%CH4 200mAΩCH3 2V
M 400ns A CH3 3.88V
T
3
4
1
LX (SWITCH) NODE
OUTPUT VOLTAGE (AC-COUPLED)
INDUCTOR CURRENT
Figure 32. DCM Mode of Operation at Light Load (100 mA)
06079-034
CH1 20mV
13.4%CH4 1AΩCH3 2V
M 2µs A CH3 1.84V
T
3
4
1
LX (SWITCH) NODE
OUTPUT VOLTAGE (AC-COUPLED)
INDUCTOR CURRENT
Figure 33. Minimum Off Time Control at Dropout
06079-031
CH1 20mV
17.4%CH4 1AΩCH3 2V
M 1µs A CH3 3.88V
T
3
4
1
OUTPUT VOLTAGE (AC-COUPLED)
INDUCTOR CURRENT
LX (SWITCH) NODE
Figure 34. PWM Mode of Operation at Medium/Heavy Load (1.5 A)