ADP2102 Analog Devices, ADP2102 Datasheet - Page 9

• Manufacturer Part Number: ADP2102
• Description: Low Duty Cycle, 600 mA, 3 MHz Synchronous Step-Down DC-to-DC Converter
• Manufacturer: Analog Devices

1.08
1.07
1.06
1.05
1.04
1.03
1.02
1.01
1.00
4.5
4.0
3.5
3.0
2.5
2.0
1.5
400
350
300
250
200
150
100
50
2.7
0
0
2.7
Figure 24. Switch On Resistance vs. Input Voltage
Figure 22. Switching Frequency vs. Load Current
3.0
3.0
100
3.3
0.8V
1.875V
3.3
Figure 23. Valley Current Limit
3.6
200
3.6
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
1V
PMOS SWITCH
NMOS SWITCH
3.9
1.8V
3.9
300
4.2
1.2V
4.2
1.5V
4.5
400
4.5
1.25V
4.8
4.8
1.375V
5.1
T
T
500
T
A
A
A
= 25°C
= 25°C
5.1
= 25°C
5.4
5.4
600
5.7
Rev. B | Page 9 of 24
Figure 27. PSM Mode Entry—Exit Operation (10 mA to 50 mA to 10 mA)
1
3
4
1
2
400
350
300
250
200
150
100
Figure 26. PSM Mode Operation at Very Light Loads (10 mA)
50
CH1 500mA Ω
CH1 50.0mV
CH3
0
–40
T
Figure 25. Switch On Resistance vs. Temperature
50.0mA Ω
CH2: V
PSM
–20
CH1: IL
CH4: LX
OUT
B W
B
B W
W
0
CH2
CH4 2.00V
PMOS SWITCH
NMOS SWITCH
TEMPERATURE (°C)
2.00V
20
CH1: V
CH3: IL
CCM
B W
B W
T
40
OUT
M 100µs A CH3
M 1.00µs
T
51.00%
60
A CH4
80
T
T
A
A
100
= 25°C
= 25°C
PSM
ADP2102
86.0mA
2.76V
120