Datasheet

LT3959
6
3959fa
For more information www.linear.com/LT3959
Typical perForMance characTerisTics
INTV
CC
vs Temperature INTV
CC
Load Regulation INTV
CC
Line Regulation
INTV
CC
Dropout Voltage
vs Current, Temperature
Internal Switch On-Resistance
vs Temperature
Internal Switch On-Resistance
vs INTV
CC
EN/UVLO Threshold
vs Temperature
SW Minimum On- and Off-Times
vs Temperature
EN/UVLO Hysteresis Current
vs Temperature
TEMPERATURE (°C)
–50
ON-RESISTANCE (mΩ)
60
40
50
30
1251007550
3959 G17
0
–25
25
20
INTC
CC
(V)
2
ON-RESISTANCE (mΩ)
50
45
40
35
54 4.5
3959 G18
3
2.5
3.5
30
TEMPERATURE (°C)
–50
EN/UVLO VOLTAGE (V)
1.27
1.25
1.23
1.21
1.19
1.17
0 125
3959 G10
–25
25 50 75 100
EN/UVLO RISING
EN/UVLO FALLING
TEMPERATURE (°C)
–50
EN/UVLO (µA)
2.4
2.2
2.0
1.8
1.6
0 125
3959 G12
–25
25 50 75 100
INTV
CC
LOAD (mA)
0
INTV
CC
VOLTAGE (V)
4
5
4.5
25
3959 G14
3.5
5
15
10
20
3
DRIVE LDO
V
IN
LDO (DRIVE = 0V)
INTV
CC
LOAD (mA)
0
DROPOUT VOLTAGE (mV)
200
400
300
25
3959 G16
100
5
15
10
20
0
V
IN
= 12V
DRIVE = 4V
125°C
25°C
–40°C
TEMPERATURE (°C)
–50
INTV
CC
(V)
5.0
4.8
4.6
4.4
4.0
3.8
4.2
3.6
0 125
3959 G13
–25
25 50 75 100
DRIVE LDO
V
IN
LDO
T
A
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
–50
MINIMUM ON/OFF TIME (ns)
200
190
180
170
160
150
140
130
0 125
3959 G11
–25
25 50 75 100
MINIMUM
OFF TIME
MINIMUM
ON TIME
V
IN
(V)
0
INTV
CC
VOLTAGE (V)
5.0
4.5
4.0
4535 40
3959 G15
3.5
5
15
10 20
3025
3.0
DRIVE LDO
DRIVE = 6V
DRIVE = 0V
V
IN
LDO