NCP5006
http://onsemi.com
10
Figure 14. Overall Efficiency vs. Power Supply @
I
out
= 40 mA, L = 22 mH
Figure 15. Feedback Voltage Stability
V
bat
(V)
205
200
FEEDBACK VOLTAGE (mV)
195
TEMPERATURE (°C)
199
202
203
201
020 10
198
197
196
−40 40−20 60 80
204
5
0
FEEDBACK VARIATION (%)
−5
TEMPERATURE (°C)
−1
2
3
1
0 20 100
−2
−3
−4
−40 40−20 60 80
4
V
bat
= 3.1 V thru 5.5 V
V
bat
= 3.1 V thru 5.5 V
Figure 16. Feedback Voltage Variation
0
10
20
30
40
50
60
70
80
90
100
2.50 3.00 3.50 4.00 4.50 5.00 5.50
5 LED/40 mA
3 LED/40 mA
4 LED/40 mA
2 LED/40 mA
Feedback Variation vs. Temperature
Feedback Variation vs. Nominal
(V
bat
= 3.0 V, 6.0 V, T = 255C)
Figure 17. Standby Current
1.4
2.7
IStby (mA)
0.0
V
bat
(V)
0.6
1.0
0.8
5
0.4
0.2
1.2
−40°C thru 125°C
3.3 3.9 4.5 5.1
Standby Current vs. V
bat
4 LED
5 LED
Figure 18. Typical Operating Frequency
0
0.5
1.0
1.5
2.0
2.5
2.5 3.0 3.5 4.0 4.5 5.0 5.5
2 LED
f (mHz)
V
bat
(V)
3 LED
Figure 19. Overvoltage Protection
26
24
−40
OVERVOLTAGE PROTECTION (V)
22
TEMPERATURE (°C)
25
0 100
23
40 80
V
bat
= 5.5 V
V
bat
= 2.7 V
V
bat
= 3.6 V
20 13
−20 60 120
Frequency = f(V
bat
) @ I
out
= 20 mA−L
out
= 22 mH OVP vs. Temperature
bat
out
out
m
All curve conditions: L = 22 mH, C
in
= 4.7 mF, C
out
= 1.0 mF,
Typical curve @ T° = +25°C
