Datasheet

LTC4267-1
5
42671fa
For more information www.linear.com/4267-1
Typical perForMance characTerisTics
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
V
PORTN
VOLTAGE (V)
0
0
INPUT CURRENT (mA)
0.1
0.2
0.3
0.4
0.5
–2
–4 –6 –8
42671 G01
–10
T
A
= 25°C
V
PORTN
VOLTAGE (V)
0
0
INPUT CURRENT (mA)
10
20
30
40
50
–10
–20 –30 –40
42671 G02
–50 –60
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
T
A
= 25°C
V
PORTN
VOLTAGE (V)
–12
9.0
INPUT CURRENT (mA)
9.5
10.5
11.0
11.5
–14
–16
42671 G03
10.0
–18
–20 –22
12.0
85°C
–40°C
CLASS 1 OPERATION
V
PORTN
VOLTAGE (V)
0
INPUT CURRENT (mA)
1
2
3
–45 –55
42671 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
42671 G05
24
–7
–9
–6 –10
–2 –4
–8
28
RESISTANCE =
DIODES: S1B
T
A
= 25°C
=
∆V
ΔI
V2 – V1
I
2
– I
1
IEEE UPPER LIMIT
IEEE LOWER LIMIT
LTC4267-1 + 2 DIODES
LTC4267-1 ONLY
TEMPERATURE (°C)
–40
–2
NORMALIZED UVLO THRESHOLD (%)
–1
0
1
2
–20 0 20 40
42671 G06
60 80
APPLICABLE TO TURN-ON
AND TURN-0FF THRESHOLDS
CURRENT (mA)
0
V
PG_OUT
(V)
2
3
8
42671 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
42671 G08
60
V
IN
= 0V
T
A
= 25°C
V
PORTN
VOLTAGE (V)
–40
CURRENT LIMIT (mA)
200
–60
42671 G09
100
–45
–50
–55
400
300
85°C
85°C
– 40°C
– 40°C
HIGH CURRENT MODE
LOW CURRENT MODE