Datasheet

LTC4267
5
4267fc
Input Current vs Input Voltage
25k Detection Range Input Current vs Input Voltage Input Current vs Input Voltage
Input Current vs Input Voltage
Signature Resistance vs
Input Voltage
Normalized UVLO Threshold vs
Temperature
Power Good Output Low Voltage
vs Current P
OUT
Leakage Current Current Limit vs Input Voltage
TYPICAL PERFOR
UW
CE CHARACTERISTICSA
V
PORTN
VOLTAGE (V)
0
0
INPUT CURRENT (mA)
0.1
0.2
0.3
0.4
0.5
–2
–4 –6 –8
4267 G01
–10
T
A
= 25°C
V
PORTN
VOLTAGE (V)
–12
9.0
INPUT CURRENT (mA)
9.5
10.5
11.0
11.5
–14
–16
4267 G03
10.0
–18
–20 –22
12.0
85°C
–40°C
CLASS 1 OPERATION
V
PORTN
VOLTAGE (V)
0
0
INPUT CURRENT (mA)
10
20
30
40
50
–10
–20 –30 –40
4267 G02
–50 –60
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
T
A
= 25°C
V
PORTN
VOLTAGE (V)
0
INPUT CURRENT (mA)
1
2
3
–45 –55
4267 G04
–60–40 –50
EXCLUDES ANY LOAD CURRENT
T
A
= 25°C
V
PORTN
VOLTAGE (V)
–1
22
V1:
V2:
SIGNATURE RESISTANCE (kΩ)
23
25
26
27
–3
–5
4267 G05
24
–7
–9
–6 –10
–2 –4
–8
28
RESISTANCE =
DIODES: S1B
T
A
= 25C
=
∆V
∆I
V2 – V1
I
2
– I
1
IEEE UPPER LIMIT
IEEE LOWER LIMIT
LTC4267 + 2 DIODES
LTC4267 ONLY
CURRENT (mA)
0
V
PG_OUT
(V)
2
3
8
4267 G07
1
0
2
4
6
10
4
T
A
= 25°C
P
OUT
PIN VOLTAGE (V)
0
0
V
OUT
CURRENT (µA)
30
60
120
90
20 40
4267 G08
60
V
IN
= 0V
T
A
= 25°C
V
PORTN
VOLTAGE (V)
–40
CURRENT LIMIT (mA)
200
–60
4267 G09
100
–45
–50
–55
400
300
85°C
85°C
– 40°C
– 40°C
HIGH CURRENT MODE
LOW CURRENT MODE
TEMPERATURE (C)
–40
–2
NORMALIZED UVLO THRESHOLD (%)
–1
0
1
2
–20 0 20 40
4267 G06
60 80
APPLICABLE TO TURN-ON
AND TURN-0FF THRESHOLDS