LT4256-2CS8 Linear Technology, LT4256-2CS8 Datasheet - Page 2

• Manufacturer Part Number: LT4256-2CS8
• Description: IC CTRLR HOTSWAP HV AUTO 8SOIC
• Manufacturer: Linear Technology
• Type: Hot-Swap Controllerr

Specifications of LT4256-2CS8

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: 10.8 V ~ 80 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ABSOLUTE AXI U RATI GS
LT4256-1/LT4256-2
(Note 1)
Supply Voltage (V
SENSE, PWRGD ....................................... – 0.3 to 100V
GATE (Note 2) ................................ – 0.3V to V
Maximum Input Current (GATE) ......................... 200µA
FB, UV ........................................................ – 0.3 to 44V
TIMER ..................................................... – 0.3V to 4.3V
Maximum Input Current (TIMER) ....................... 100µA
Operating Temperature
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
temperature range, otherwise specifications are at T
SYMBOL
V
I
V
V
I
V
V
I
I
I
∆V
V
V
V
I
I
I
I
V
D
2
ELECTRICAL CHARACTERISTICS
CC
INUV
INSNS
PU
PD
PWRGD
INFB
TIMERPU
TIMERPD
CC
UVLH
UVHYS
UVRTH
SENSETRIP
FB
FBHYS
OLPGD
THTIMER
TIMER
GATE
LT4256C ................................................. 0°C to 70°C
LT4256I ............................................. – 40°C to 85°C
PARAMETER
Operating Voltage
Operating Current
Undervoltage Threshold
Hysteresis
UV Input Current
Fault Latch Reset Threshold Voltage
SENSE Pin Trip Voltage (V
SENSE Pin Input Current
GATE Pull-Up Current
GATE Pull-Down Current
External N-Channel Gate Drive (Note 2)
FB Voltage Threshold
FB Hysteresis Voltage
PWRGD Output Low Voltage
PWRGD Pin Leakage Current
FB Input Current
TIMER Pull-Up Current
TIMER Pull-Down Current
TIMER Shut-Down Threshold
Duty Cycle (RETRY Mode)
CC
W
) ................................ – 0.3 to 100V
W W
CC
– V
SENSE
)
U
A
= 25°C. V
CC
CONDITIONS
V
UV ≥ 1.2V
UV = 0V
FB = 0V
FB ≥ 2V
V
Charge Pump On, ∆V
Any Fault, V
V
20V ≤ V
FB High-to-Low Transition
FB Low-to-High Transition
I
I
V
FB = 4.5V
TIMER = 3V, During Fault
TIMER = 3V
C
O
O
CC
SENSE
GATE
PWRGD
TIMER
= 1.6mA
= 5mA
+ 10V
The
Low-to-High Transition
– V
= 10nF
= V
CC
●
= 80V
CC
CC
denotes the specifications which apply over the full operating
CC
≤ 80V
GATE
, 10.8V ≤ V
= 48V unless otherwise noted.
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
= 3V
PWRGD
GATE
GND
CC
UV
FB
T
JMAX
≤ 20V
= 7V
1
2
3
4
8-LEAD PLASTIC SO
= 125°C, θ
S8 PACKAGE
TOP VIEW
JA
= 110°C/W
http://www.linear.com/leadfree/
8
7
6
5
●
●
●
●
●
●
●
●
●
●
●
●
●
●
V
SENSE
GATE
TIMER
CC
10.8
3.96
0.25
3.95
MIN
–16
– 63
0.4
5.5
4.5
4.2
0.3
1.5
4.3
1.5
45
40
10
U
S8 PART MARKING
– 105
–0.1
–1.5
0.85
11.6
3.99
4.45
0.45
0.25
–0.1
4.65
TYP
– 32
1.8
0.4
8.8
0.6
0.1
14
55
40
62
LT4256-1CS8
LT4256-1IS8
LT4256-2CS8
LT4256-2IS8
4
3
3
ORDER PART
NUMBER
42561
42561I
42562
42562I
W
–147
MAX
4.04
0.55
12.5
12.8
4.03
4.65
– 63
3.9
1.2
0.6
0.4
4.5
–1
–3
– 1
80
22
65
70
80
1
1
5
5
425612fa
UNITS
U
mA
mV
mV
mA
µA
µA
µA
µA
µA
µA
µA
µA
%
V
V
V
V
V
V
V
V
V
V
V
V