Datasheet

Data Sheet ADP1649
Rev. 0 | Page 9 of 28
Figure 11. Exit from TxMASK1 Mode
Figure 12. Switching Frequency vs. Supply Voltage (3 MHz Mode)
Figure 13. Standby Current vs. Temperature
Figure 14. Flash Mode Efficiency vs. LED Current
Figure 15. Voltage Regulation Mode Efficiency vs. Load Current
Figure 16. ADC External Voltage Mode Transfer Characteristic
CH1 2.00V CH2 500mA
CH4 2.00VCH3 500mA
M20.00µs A CH1 1.20V
3
4
2
1
T 80.00µs
LED_OUT
I
BAT
I
LED
GPIO (TxMASK1)
10779-011
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
10779-012
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
10779-013
0
10
20
30
40
50
60
70
80
90
100
0.3 0.5 0.7 0.9 1.0
EFFICIENCY (%)
LED CURRENT (A)
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 3.4V
V
IN
= 3.2V
10779-014
40
50
60
70
80
90
100
0.01 0.1 1
EFFICIENCY (%)
OUTPUT CURRENT (A)
V
IN
= 2.7V
V
IN
= 3.0V
V
IN
= 3.3V
V
IN
= 3.6V
V
IN
= 4.2V
10779-015
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
10779-016