LTC3212 Datasheet, PDF (4/12 Pages) Linear Technology – RGB LED Driver and Charge Pump

LTC3212
Typical Performance Characteristics
1x Mode Charge Pump
Resistance vs Temperature
6.5
I_CPO = 50mA
6.0
V_IN = 3V
5.5
5.0
V_IN = 3.6V
4.5
V_IN = 4.2V
4.0
3.5
3.0
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3212 G04
2x Mode CPO Open-Loop Output
Resistance
35
33
31
85°C
29
27
25°C
25
23
–40°C
21
19
17 ^{C1, C2, C3 = 1µF}
V_CPO = 4.8V
15
2.7
3.0
3.3
V_IN (V)
3.6
4.0
3212 G05
2x Mode CPO Voltage
vs CPO Current
5.2
3.6V
5.0
4.8
3.5V
3.4V 3.3V
3.2V
4.6
3.1V
4.4
V_IN = 3.0V
4.2
C1, C2, C3 = 1µF
4.0
0 10 20 25 30 35 40 45 50 55 60 65 70
CPO CURRENT (mA)
3212 G06
Oscillator Frequency
vs V_IN Voltage
892
V_IN Shutdown Current
vs V_IN Voltage
6
1x Mode No-Load V_IN Current
vs V_IN Voltage
350
890
5
340
888
4
330
886
3
320
884
2
310
882
1
300
880
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_IN (V)
3212 G07
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_IN (V)
3212 G08
290
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_IN (V)
3212 G09
2x Mode V_IN Current
vs V_IN Voltage
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_IN (V)
3212 G10
Start-Up and Mode Switch
SOFT-START
CPO
1V/DIV
0V
5V 2x
3.6V MODE
DROPOUT
1x _DELAY
MODE
LEDEN
2V/DIV
0V
V_IN = 3.6V
3.6V
200µs/DIV
3212 G11
3212fb