Datasheet

LT3791
8
3791fa
V
(BST1-SW1)
, V
(BST2-SW2)
UVLO
vs Temperature
BG1, BG2 Driver On-Resistance
vs Temperature
TG1, TG2 Driver On-Resistance
vs Temperature
PWMOUT On-Resistance
vs Temperature V
C
Voltage vs Duty Cycle
V
(SNSP-SNSN)
Buck Threshold
vs V
C
V
(SNSP-SNSN)
Buck Threshold
vs Temperature
V
(SNSP-SNSN)
Boost Threshold
vs V
C
V
(SNSP-SNSN)
Boost Threshold
vs Temperature
TEMPERATURE (°C)
–50
V
(BST1-SW1)
, V
(BST2,SW2)
(V)
3.5
3.7
150
3791 G28
3.3
3.1
0
50
100
–25
25
75
125
3.9
3.4
3.6
3.2
3.8
RISING
FALLING
TEMPERATURE (°C)
–50
BG1, BG2 RESISTANCE (Ω)
2.5
3.0
3.5
150
3791 G29
2.0
1.5
0
0
50
100
–25
25
75
125
0.5
1.0
4.5
4.0
PULL-UP
PULL-DOWN
TEMPERATURE (°C)
–50
TG1, TG2 RESISTANCE (Ω)
2.0
3.0
150
3791 G30
1.0
0
0
50
100
–25
25
75
125
4.0
1.5
2.5
0.5
3.5
PULL-UP
PULL-DOWN
TEMPERATURE (˚C)
–50
PWMOUT RESISTANCE (Ω)
8
10
12
100 125
3791 G31
6
4
–25 0 25 50 75 150
2
0
14
PULL-UP
PULL-DOWN
DUTY CYCLE (%)
0
V
C
(V)
0.6
0.8
1.0
60
100
3791 G32
0.4
0.2
0
20 40 80
1.2
1.4
1.6
BG2
BG1
V
(SNSP-SNSN)
= 0V
V
C
(V)
0.6
–60
V
(SNSP-SNSN)
(mV)
–40
–20
0
20
60
0.8
1.0 1.2 1.4
3791 G33
1.6 1.8
40
TEMPERATURE (°C)
–50
–60
V
(SNSP-SNSN)
THRESHOLD (mV)
–40
–20
0
20
0 50
100
150
3791 G34
40
60
–25 25
75
125
V
C(MIN)
V
C(MAX)
V
C
(V)
0.6
60
40
20
0
–20
–40
–60
–80
1.2 1.6
3791 G35
0.8 1.0
1.4 1.8
V
(SNSP-SNSN)
(mV)
TEMPERATURE (˚C)
–50
V
(SNSP-SNSN)
THRESHOLD (mV)
0
20
40
100 125
3791 G36
–20
–40
–25 0 25 50 75 150
–60
–80
60
V
C(MAX)
V
C(MIN)
Typical perForMance characTerisTics
T
A
= 25°C, unless otherwise noted.