Datasheet

LTC4264
4
4264f
TYPICAL PERFORMANCE CHARACTERISTICS
Input Current vs Input Voltage
25k Detection Range
Input Current vs Input Voltage Input Current vs Input Voltage
Signature Resistance
vs Input Voltage
Class Operation vs Time On Resistance vs Temperature
Active Low PWRGD
Output Low Voltage vs Current
Current Limit vs Input Voltage
Active High PWRGD
Output Low Voltage vs Current
INPUT VOLTAGE (V)
0
0
INPUT CURRENT (mA)
0.1
0.2
0.3
0.4
0.5
–2
–4 –6 –8
4264 G01
–10
T
A
= 25°C
INPUT VOLTAGE (V)
0
0
INPUT CURRENT (mA)
20
40
60
80
100
–10
–20 –30
*OPTIONAL CLASS CURRENT
–40
4264 G02
–50 –60
T
A
= 25°C
CLASS 5*
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
INPUT VOLTAGE (V)
–12
9.0
INPUT CURRENT (mA)
9.5
10.5
11.0
11.5
–14
–16
4264 G03
10.0
–18
–20 –22
12.0
85°C
–40°C
CLASS 1 OPERATION
INPUT VOLTAGE (V)
–1
22
V1:
V2:
SIGNATURE RESISTANCE (kΩ)
23
25
26
27
–3
–5
4264 G04
24
–7
–9
–6 –10
–2 –4
–8
28
RESISTANCE =
DIODES: HD01
T
A
= 25°C
=
∆V
∆I
V2 – V1
I
2
– I
1
IEEE UPPER LIMIT
IEEE LOWER LIMIT
LTC4264 + 2 DIODES
LTC4264 ONLY
INPUT
VOLTAGE
10V/DIV
CLASS
CURRENT
20mA/DIV
TIME (10µs/DIV)
4264 G05
T
A
= 25°C
JUNCTION TEMPERATURE (°C)
–50
0
RESISTANCE (Ω)
0.2
0.4
0.6
0.8
1.0
–25
02550
4264 G06
75 100
CURRENT (mA)
0
V
PWRGD_OUT
– V
IN
(V)
2
3
8
4264 G07
1
0
2
4
6
10
4
T
A
= 25°C
INPUT VOLTAGE (V)
–40
200
CURRENT LIMIT (mA)
400
600
800
–40°C
–40°C
85°C
85°C
–45 –50
4264 G09
–55 –60
HIGH CURRENT MODE
LOW CURRENT MODE
I
IN
(mA)
0
0
PWRGD (V)
0.4
1.0
0.5
1
4264 G08
0.2
0.8
0.6
1.5
2
T
A
= 25°C
GND – V
OUT
= 4V