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Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - power management - special purpose 16 µA QFN 44 (4x7)
11121314151617181920
LTC3675/LTC3675-1
13
36751fc
For more information www.linear.com/LTC3675
Typical perForMance characTerisTics
LED Driver, LED Current
vs Temperature
High Voltage Boost Regulator,
Efficiency vs Load Always-On LDO, Load Regulation
Buck-Boost Regulator,
V
OUT6
vs Temperature
Buck-Boost Regulator, Forward
Current Limit vs Temperature
Buck-Boost Regulator, Switch
R
DSON
vs Temperature
LED Driver, Dual String
Efficiency, 10 LEDs per String
LED Driver, Dual String
Efficiency, 4 LEDs per String
LED Driver, Forward Current
Limit vs Temperature
TEMPERATURE (°C)
V
OUT6
(V)
3.40
3.36
3.38
3.32
3.34
3.26
3.24
3.30
3.28
3.22
3.20
–15–35
36751 G40
5 25 65 85 105 125–55 45
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 5.5V
PWM MODE, LOAD = 500mA
TEMPERATURE (°C)
I
FWD6
(A)
2.90
2.80
2.85
2.70
2.75
2.55
2.50
2.65
2.60
2.45
2.40
–15–35
36751 G41
5 25 65 85 105 125–55 45
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
TEMPERATURE (°C)
R
DSON
(Ω)
0.60
0.50
0.55
0.40
0.45
0.25
0.20
0.35
0.30
0.15
0.10
0.05
0
–15–35
36751 G42
5 25 65 85 105 125–55 45
NMOS R
DSON
, V
IN
= 2.7V
PMOS R
DSON
, V
IN
= 2.7V
PMOS R
DSON
, V
IN
= 4.2V
NMOS R
DSON
, V
IN
= 4.2V
DAC CODE (DECIMAL)
EFFICIENCY (%)
100
80
90
60
70
30
20
50
40
10
0
10010
36751 G43
10001
V
IN
= 4.2V
V
IN
= 2.7V
R
LED_FS
= 20kΩ
DAC CODE (DECIMAL)
80
90
60
70
30
20
50
40
10
0
10010
36751 G44
10001
V
IN
= 4.2V
V
IN
= 2.7V
R
LED_FS
= 20kΩ
TEMPERATURE (°C)
I
FWD6
(A)
2.10
2.00
2.05
1.85
1.80
1.95
1.90
1.75
1.70
1.65
1.60
–15–35
36751 G45
5 25 65 85 105 125–55 45
V
IN
= 3.6V
V
IN
= 2.7V
V
IN
= 5.5V
TEMPERATURE (°C)
I
LED
(mA)
10.25
10.15
10.20
10.00
9.95
10.10
10.05
9.90
9.85
9.80
9.75
–15–35
36751 G46
5 25 65 85 105 125–55 45
V
IN
= 5.5V
V
IN
= 2.7V
V
IN
= 3.6V
SINGLE LED STRING CURRENT
MODE0 = MODE1 = 0
LOAD CURRENT (mA)
80
90
60
70
30
20
50
40
10
0
10010
36751 G47
10001
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 5.5V
MODE1 = 1, MODE0 = 0
V
OUT
= 12V
LOAD CURRENT (mA)
V
OUT
(V)
1.220
1.210
1.215
1.195
1.190
1.205
1.200
1.185
1.180
101
36751 G48
1000.1
V
IN
= 2.7V
V
IN
= 5.5V
V
IN
= 3.6V