Datasheet

LTC4219
5
4219fb
I
DD
vs V
DD
INTV
CC
Load Regulation
EN1, EN2 Low Threshold
vs Temperature
V
DD
(V)
0
1.0
I
DD
(mA)
1.2
1.4
1.6
1.8
2.0
5 101520
4219 G01
25 30
–40°C
25°C
85°C
I
LOAD
(mA)
0
0
0.5
1.5
1.0
INTV
CC
(V)
3.5
2.0
2.5
3.0
4219 G02
–14–12–10–8–6–4–2
V
DD
= 5V
V
DD
= 3.3V
TEMPERATURE (°C)
–50
UV LOW-HIGH THRESHOLD (V)
1.234
1.232
1.230
1.228
1.226
–25 0 25
4219 G03
50 75 100
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, V
DD
= 12V unless otherwise noted.
EN1, EN2 Hysteresis
vs Temperature
Timer Pull-Up Current
vs Temperature
Current Limit Delay
(t
PHL(ILIM)
vs Overdrive)
Current Limit Threshold Foldback,
LTC4219-5
Current Limit Adjustment
(I
OUT
vs R
SET
)
TEMPERATURE (°C)
–50
UV HYSTERESIS (V)
0.10
0.08
0.06
0.04
–25 0 25
4219 G04
50 75 100
TEMPERATURE (°C)
–50
TIMER PULL-UP CURRENT (µA)
–110
–105
–100
–95
–90
–25 0 25
4219 G05
50 75 100
OUTPUT CURRENT (A)
0
CURRENT PROPAGATION DELAY (µs)
1000
100
10
1
0.1
10
4219 G06
20 30
V
OUT
(V)
0
CURRENT LIMIT VALUE (A)
6
5
4
3
2
1
0
1234
4219 G07
5
R
SET
(Ω)
1k
CURRENT LIMIT THRESHOLD VALUE (A)
6
5
4
3
2
1
0
10k 100k
4219 G09
1M 10M
Current Limit Threshold Foldback,
LTC4219-12
V
OUT
(V)
0
CURRENT LIMIT VALUE (A)
6
5
4
3
2
1
0
369
4219 G08
12