Datasheet

LTC4263-1
3
42631fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power MOSFET
R
ON
On-Resistance I = 350mA, Measured From OUT to V
SS
l
1.5 2.4
3.0
Ω
Ω
I
OUT_LEAK
OUT Pin Leakage V
OUT
– V
SS
= V
DD48
– V
SS
= 57V
l
110 μA
R
PU
OUT Pin Pull-Up Resistance to V
DD48
0V ≤ (V
DD48
– V
OUT
) ≤ 5V
l
360 500 640
kΩ
Current Control
I
CUT
Overload Current Threshold
l
540 570 600 mA
I
LIM
Short-Circuit Current Limit V
OUT
– V
SS
= 5V
V
DD48
– V
OUT
= 30V
l
l
615
615
645
645
675
675
mA
mA
I
FB
Foldback Current Limit V
DD48
– V
OUT
= 0V (Note 6)
V
DD48
– V
OUT
= 10V
l
l
45
165
90
220
180
275
mA
mA
I
MIN
DC Disconnect Current Threshold
l
5.2 7.5 9.8 mA
I
FAULT
High Speed Fault Current Limit (Note 7)
l
750 1000 1200 mA
Detection
I
DET
Detection Current First Point, V
DD48
– V
OUT
= 10V
Second Point, V
DD48
– V
OUT
= 3.5V
l
l
235
160
255
180
275
200
μA
μA
V
DET
Detection Voltage Compliance V
DD48
– V
OUT
, Open Port
V
DD48
– V
SS
= 57V
l
21 V
R
DETMIN
Minimum Valid Signature Resistance
l
15.5 17 18.5
kΩ
R
DETMAX
Maximum Valid Signature Resistance
l
27.5 29.7 32
kΩ
R
OPEN
Open-Circuit Threshold
l
500 2000
kΩ
AC Disconnect
R
OSC
OSC Pin Input Impedance 2V ≤ (V
OSC
– V
SS
) ≤ 3V
l
175 250 325
kΩ
I
OSC
OSC Pin Output Current V
OSC
– V
SS
= 2V
l
–140 140 μA
f
OSC
OSC Pin Frequency V
OSC
– V
SS
= 2V
l
103 110 115 Hz
A
VACD
Voltage Gain OSC to ACOUT 2V ≤ (V
OSC
– V
SS
) ≤ 3V
l
0.95 1.0 1.05 V/V
I
ACDMAX
AC Disconnect Output Current V
OSC
– V
SS
= 2V, 0V ≤ (V
ACOUT
– V
SS
) ≤ 4V
l
–1 1 mA
I
ACDMIN
Remain Connected AC Pin Current V
OSC
– V
SS
= 2V
l
130 160 190 μA
V
ACDEN
AC Disconnect Enable Signal V
OSC
– V
SS
, Port On
l
1.5 V
Digital Interface (Note 8)
V
OLED
LED Output Low Voltage I
LED
= 10mA
l
1.1 2.2 V
V
ILD
Digital Input Low Voltage MIDSPAN, SD
LEGACY
l
l
0.8
0.4
V
V
V
IHD
Digital Input High Voltage MIDSPAN, SD
LEGACY
l
l
2.2
2.2
V
V
V
OZ
Voltage of Legacy Pin if Left Floating
l
1.1 1.25 1.4 V
I
OLEG
Current In/Out of Legacy Pin 0V ≤ (V
LEGACY
– V
SS
) ≤ 5V
l
–60 60 μA
I
FLT
Maximum Allowed Leakage at Legacy
Pin When Floating
l
–10 10 μA
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
DD48
– V
SS
= 48V and V
DD5
not driven externally. All voltages are
relative to V
SS
unless otherwise noted. (Note 2, Note 5)