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| LTC3202 Datasheet, PDF (3/12 Pages) Linear Technology – Low Noise, High Efficiency Charge Pump for White LEDs | |||
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TYPICAL PERFOR A CE CHARACTERISTICS
LTC3202
VFB Set Point vs Input Supply
(200mV Setting)
0.21
ILOAD = 20µA
VD0 = VIN
VD1 = 0V
TA = 85°C
TA = 25°C
0.20
TA = â40°C
VFB Set Point vs Input Supply
(400mV Setting)
0.42
ILOAD = 40µA
VD0 = 0V
VD1 = VIN
TA = 85°C
TA = 25°C
0.40
TA = â40°C
0.19
2.7 3.0 3.3 3.6 3.9 4.2 4.5
INPUT SUPPLY (V)
3202 G01
VFB Set Point vs Input Supply
(600mV Setting)
0.63
ILOAD = 60µA
VD0 = VD1 = VIN
TA = 25°C, 85°C
0.60
TA = â40°C
0.57
2.7 3.0 3.3 3.6 3.9 4.2 4.5
INPUT SUPPLY (V)
3202 G03
Input Current vs Load Current
160
VIN = 3.6V
140
CIN = COUT = CFLY1 = CFLY2 = 1µF
TA = 25°C
120
100
VOUT = 4.5V
80
VOUT = 4V
60
40
20
0
0
20
40
60
80 100
LOAD CURRENT (mA)
3202 G05
0.38
2.7 3.0 3.3 3.6 3.9 4.2 4.5
INPUT SUPPLY (V)
3202 G02
VFB vs Load Current
0.8
VD0 = VD1 = VIN
CIN = COUT = CFLY1 = CFLY2 = 1µF
0.7 VOUT â VFB = 3.4V
TA = 25°C
0.6
VIN = 3.2V
0.5
VIN = 3V
0.4
0.3
0.2
0
25 50 75 100 125 150
LOAD CURRENT (mA)
3202 G04
Oscillator Frequency vs Supply
Voltage
1.9
1.7
TA = â40°C
1.5
TA = 25°C
1.3
TA = 85°C
1.1
0.9
2.7
3.0 3.3 3.6 3.9 4.2 4.5
SUPPLY VOLTAGE (V)
3202 G06
3202fa
3
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