Datasheet
LTC3675/LTC3675-1
8
36751fc
For more information www.linear.com/LTC3675
Typical perForMance characTerisTics
Enable Threshold vs Temperature
Enable Pin Precision Threshold
vs Temperature
1A Buck Regulators,
Efficiency vs Load
1A Buck Regulators,
Efficiency vs Load
1A Buck Regulators,
Load Regulation
1A Buck Regulators,
Line Regulation
Undervoltage Threshold
vs Temperature
Input Supply Current
vs Temperature
Oscillator Frequency
vs Temperature
T
A
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
UV THRESHOLD (V)
2.70
2.60
2.65
2.45
2.40
2.55
2.50
2.35
2.30
–15–35
36751 G01
5 25 65 85 105 125–55 45
V
IN_FALLING
V
IN_RISING
TEMPERATURE (°C)
I
VIN_ALLOFF
(µA)
50
40
45
30
35
15
10
25
20
5
0
–15–35
36751 G02
5 25 65 85 105 125–55 45
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 5.5V
ALL REGULATORS AND LED
DRIVER IN SHUTDOWN
TEMPERATURE (°C)
f
OSC
(MHz)
2.50
2.40
2.45
2.30
2.35
2.15
2.10
2.25
2.20
2.05
2.00
–15–35
36751 G03
5 25 65 85 105 125–55 45
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 5.5V
TEMPERATURE (°C)
EN THRESHOLD (V)
900
800
850
700
750
550
650
600
450
500
400
–15–35
36751 G04
5 25 65 85 105 125–55 45
EN RISING
EN FALLING
ALL REGULATORS AND LED
DRIVER DISABLED, V
IN
= 3.6V
TEMPERATURE (°C)
EN THRESHOLD (mV)
420
410
415
400
405
385
395
390
380
–15–35
36751 G05
5 25 65 85 105 125–55 45
EN RISING
THRESHOLD MEASURED WITH A
REGULATOR ENABLED, V
IN
= 3.6V
EN FALLING
LOAD CURRENT (mA)
EFFICIENCY (%)
100
60
70
80
90
40
50
10
30
20
0
36751 G06
10 100 10001
V
IN
= 2.7V Burst Mode OPERATION
V
IN
= 3.6V Burst Mode OPERATION
V
IN
= 5.5V Burst Mode OPERATION
V
IN
= 2.7V PULSE SKIPPING-MODE
V
IN
= 3.6V PULSE SKIPPING-MODE
V
IN
= 5.5V PULSE SKIPPING-MODE
V
OUT
= 1.2V
LOAD CURRENT (mA)
EFFICIENCY (%)
100
60
70
80
90
40
50
10
30
20
0
36751 G07
10 100 10001
V
IN
= 2.7V Burst Mode OPERATION
V
IN
= 3.6V Burst Mode OPERATION
V
IN
= 5.5V Burst Mode OPERATION
V
IN
= 2.7V PULSE SKIPPING-MODE
V
IN
= 3.6V PULSE SKIPPING-MODE
V
IN
= 5.5V PULSE SKIPPING-MODE
V
OUT
= 2.5V
LOAD CURRENT (mA)
V
OUT1
(V)
1.220
1.204
1.208
1.212
1.216
1.196
1.200
1.184
1.192
1.188
1.180
36751 G08
10 100 10001
V
IN
= 2.7V
PULSE-SKIPPING MODE
V
IN
= 3.6V
V
IN
= 5.5V
V
IN
(V)
V
OUT1
(V)
1.220
1.212
1.196
1.188
1.204
1.180
1.216
1.200
1.192
1.208
1.184
36751 G09
3.1 5.14.7 5.53.93.5 4.32.7
PULSE-SKIPPING MODE
LOAD = 100mA
LOAD = 500mA