Datasheet

ADP1650
Rev. C | Page 9 of 32
08837-036
CH4
CH2
CH2 2V
CH4 500mA Ω1V
1A Ω M40µs A CH1 680mV
4
3
2
1
T 16%
LED_OUT
GPIO1 (TxMASK1)
I
BAT
I
LED
Figure 12. Exit from TxMASK1 Mode
2.94
2.95
2.96
2.97
2.98
2.99
3.00
3.01
3.02
3.03
3.04
2.7 3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4
f
SW
(MHz)
INPUT VOLTAGE (V)
–40°C
+25°C
+85°C
+125°C
08837-038
Figure 13. Switching Frequency vs. Supply Voltage (3 MHz Mode)
0
1
2
3
4
5
6
–40 –20 0 20 40 60 80 100 120
STANDBY CURRENT (µA)
TEMPERATURE (°C)
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.5V
08837-043
Figure 14. Standby Current vs. Temperature
0
10
20
30
40
50
60
70
80
90
100
0.30.50.70.91.11.31.5
EFFICIEN
C
Y (%)
LED CURRENT (A)
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 3.4V
V
IN
= 3.2V
0
8837-044
Figure 15. Flash Mode Efficiency vs. LED Current
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1
EFFICIEN
C
Y (%)
OUTPUT CURRENT (A)
V
IN
= 2.7V
V
IN
= 3.0V
V
IN
= 3.6V
V
IN
= 4.2V
08837-045
Figure 16. Voltage Regulation Mode Efficiency vs. Load Current
08837-059
0 50 100 150 200 250 300 350 400 450 500 550
ADC RESULT (Binary)
ADC INPUT VOLTAGE (mV)
0010
0000
0100
0110
1000
1010
1100
1110
1111
Figure 17. ADC External Voltage Mode Transfer Characteristic