Datasheet

LT3751
5
3751fc
Typical perForMance characTerisTics
V
CC
Pin Current V
TRANS
Supply Current CHARGE Pin Current
CHARGE Pin Minimum
Enable Voltage
CHARGE Pin Maximum
Disable Voltage DONE, FAULT Pin Voltage Low
V
OUT
Comparator Trip Voltage UVLO1 Trip Voltage UVLO1 Trip Current
PIN VOLTAGE (V)
0
PIN CURRENT (mA)
7
6
4
2
5
3
1
0
168 20
3751 G01
24124
–40°C
25°C
125°C
PIN VOLTAGE (V)
0
I
VTRANS
CURRENT (µA)
150
145
135
120
125
140
130
115
110
4020 50
3751 G02
603010
–40°C
25°C
125°C
RV
TRANS
, RV
OUT
, R
DCM
= 25k
V
CC
, CHARGE = 5V
I
VTRANS
= I
RVTRANS
+ I
RVOUT
+ I
RDCM
PIN VOLTAGE (V)
0
CURRENT (µA)
450
400
300
150
200
350
250
100
50
0
168 20
3751 G03
24124
–40°C
25°C
125°C
–40
CHARGE PIN VOLTAGE (V)
1.3
1.2
1.0
0.7
0.8
1.1
0.9
0.6
40 600 80 100
3751 G04
12020
TEMPERATURE (°C)
–20
V
CC
= 5V
V
CC
= 12V
V
CC
= 24V
–40
CHARGE PIN VOLTAGE (V)
1.2
1.1
0.9
0.6
0.7
1.0
0.8
0.5
40 600 80 100
3751 G05
12020
TEMPERATURE (°C)
–20
V
CC
= 5V
V
CC
= 12V
V
CC
= 24V
–40
PIN LOW VOLTAGE (mV)
400
350
200
250
50
100
300
150
0
40 600 80 100
3751 G06
12020
TEMPERATURE (°C)
–20
1mA SINK
100µA SINK
10µA SINK
–40
V
DRAIN
– V
TRANS
VOLTAGE (V)
30.8
30.4
29.2
29.6
30.0
28.8
28.4
40 600 80 100
3751 G07
12020
TEMPERATURE (°C)
–20
RV
TRANS
, RV
OUT
= 25.5k (R
TOL
= 1%)
R
BG
= 833Ω
V
TRANS
= 5V
V
TRANS
= 12V
V
TRANS
= 24V
V
TRANS
= 48V
V
TRANS
= 72V
–40
UVLO1 PIN VOLTAGE (V)
1.236
1.234
1.228
1.230
1.232
1.226
1.224
40 600 80 100
3751 G08
12020
TEMPERATURE (°C)
–20
V
CC
= 5V
V
CC
= 12V
V
CC
= 24V
–40
UVLO1 PIN CURRENT (µA)
50.5
50.4
49.9
50.2
50.1
50.0
50.3
49.8
49.7
40 600 80 100
3751 G09
12020
TEMPERATURE (°C)
–20
V
CC
= 5V
V
CC
= 12V
V
CC
= 24V