LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
TYPICAL PERFORMANCE CHARACTERISTICS
V
GATEH
vs Temperature
3.6
3.4
3.2
V
GATEH
(V)
V
GATEL
(V)
3.0
2.8
2.6
2.4
2.2
2.0
–55 –35 –15
5 25 45 65 85 105 125
TEMPERATURE (°C)
425212 G31
V
GATEL
vs Temperature
0.8
UV/0V = 4V
0.7 TIMER = 0V
GATE THRESHOLD
0.6 BEFORE RAMP-UP
UV THRESHOLD (V)
0.5
0.4
0.3
0.2
0.1
0
–55 –35 –15
5 25 45 65 85 105 125
TEMPERATURE (°C)
425212 G14
UV Threshold vs Temperature
3.375
3.275
3.175
3.075
2.975
2.875
2.775
–55 –35 –15
V
UV
V
GATEH
= V
IN
– V
GATE
,
I
IN
= 2mA
(MS ONLY)
V
UVH
V
UVL
5 25 45 65 85 105 125
TEMPERATURE (°C)
425212 G15
OV Threshold vs Temperature
6.45
6.25
6.05
OV THRESHOLD (V)
I
SENSE
(A)
5.85
5.65
5.45
5.25
5.05
4.85
–55 –35 –15
5 25 45 65 85 105 125
TEMPERATURE (°C)
425212 G16
I
SENSE
vs Temperature
–10
0.01
–12
–14
–16
–I
SENSE
(mA)
–18
–20
–22
–24
UV/0V = 4V
TIMER = 0V
GATE = HIGH
V
SENSE
– V
EE
= 50mV
5 25 45 65 85 105 125
TEMPERATURE (°C)
425212 G17
I
SENSE
vs (V
SENSE
– V
EE
)
V
OVH
0.1
1.0
V
OVL
10
UV/0V = 4V
TIMER = 0V
GATE = HIGH
T
A
= 25°C
1.5
2.0
V
OV
–26
–28
100
–30
–55 –35 –15
1000
–1.5 –1.0 –0.5
0
0.5 1.0
(V
SENSE
– V
EE
) (V)
425212 G18
TIMER Threshold
vs Temperature
5.0
4.5
4.0
TIMER THRESHOLD (V)
3.5
I
TMR
(μA)
3.0
2.5
2.0
1.5
1.0
0.5
0
–55 –35 –15
5 25 45 65 85 105 125
TEMPERATURE (°C)
425212 G19
I
TMR
(Initial Cycle, Sourcing)
vs Temperature
10
TIMER = 2V
50
45
40
I
TMR
(mA)
35
30
25
20
15
5 25 45 65 85 105 125
TEMPERATURE (°C)
425212 G20
I
TMR
(Initial Cycle, Sinking)
vs Temperature
TIMER = 2V
V
TMRH
9
8
7
6
5
4
3
2
1
0
–55 –35 –15
V
TMRL
10
–55 –35 –15
5 25 45 65 85 105 125
TEMPERATURE (°C)
425212 G21
425212fd
7
LINER [ LINEAR TECHNOLOGY ]
