LTC3214 Linear Technology, LTC3214 Datasheet - Page 4

• Manufacturer Part Number: LTC3214
• Description: 500mA Camera LED Charge Pump
• Manufacturer: Linear Technology

LTC3214
TYPICAL PERFOR A CE CHARACTERISTICS
4
100
90
80
70
60
50
40
30
20
10
0
2.9
Efficiency vs V
LED = AOT2015
V
F
100mA
3.1
= 2.9V TYP AT 100mA
3.3
50mV/DIV
200mA
V
3.5
CPO
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
IN
2.9
V
Input Shutdown Current
vs Input Voltage
300mA
IN
1.5x Mode CPO Output Ripple
V
I
3.7
CPO
IN
(V)
T
= 3.6V
3.1
A
= 200mA
= 25°C
3.9
3.3
50mA
4.1
INPUT VOLTAGE (V)
W
3.5
4.3
500ns/DIV
3215 G08
3.7
U
T
A
4.5
= –40°C
3.9
4.1
T
A
= 85°C
3300
3200
3100
3000
2800
2700
2900
4.3
3214 G06
3214 G11
I
vs I
0
SET
4.5
LED
/I
LED
100
25°C
Current
–40°C
85°C
Current Ratio
I
LED
200
CURRENT (mA)
A/C COUPLED
300
50mV/DIV
V
910
900
890
880
870
860
850
840
830
CPO
400
2.9
Oscillator Frequency
vs Supply Voltage
2x Mode CPO Output Ripple
V
I
CPO
IN
(T
3214 G09
= 3.6V
3.1
A
= 400mA
T
500
= 25°C unless otherwise specified)
A
= 25°C
3.3
SUPPLY VOLTAGE (V)
3.5
500ns/DIV
600
500
400
300
200
100
0
3.7
T
2.9
I
A
LED
= –40°C
3.9
3.1
Current vs Input Voltage
T
4.1
3.3
A
= 85°C
4.3
3.5
3214 G07
3214 G12
V
4.5
IN
3.7
(V)
36.6k
72.2k
3.9
7.15k
17.4k
11.8k
4.1
4.3
3214 G10
3214f
4.5