LTC1255CS8 Linear Technology, LTC1255CS8 Datasheet - Page 10

• Manufacturer Part Number: LTC1255CS8
• Description: IC MOSFET DVR HI-SIDE DUAL 8SOIC
• Manufacturer: Linear Technology

Specifications of LTC1255CS8

• Configuration: High-Side
• Input Type: Non-Inverting
• Delay Time: 180µs
• Number Of Configurations: 2
• Number Of Outputs: 2
• Voltage - Supply: 9 V ~ 24 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Peak: -
• High Side Voltage - Max (bootstrap): -

APPLICATIO S I FOR ATIO
LTC1255
The switches can either be turned OFF by the controlling
logic during these transients or latched OFF above 30V by
holding the drain sense pin low as shown in Figure 9.
Switch status can be ascertained by means of an XNOR
gate connected to the input and switch output through
100k current limiting resistors (see Typical Applications
section for more detail on this scheme). The switch is reset
after the overvoltage event by cycling the input low and
then high again.
The power MOSFET switch should be selected to have a
breakdown voltage sufficiently higher than the 40V supply
clamp voltage to ensure that no current is conducted to the
load during the transient.
TYPICAL APPLICATIO S
10
10k** MTD3055E
SOLENOID
14V
14V/1A
TRUTH TABLE
IN
0
1
0
1
OUT
0
0
1
1
0.036
U U
OVERCURRENT
SWITCH OFF
OPEN LOAD**
SWITCH ON
CONDITION
1N5400
12V
MMBZ5242B
Dual Automotive High-Side Switch with Overvoltage Protection,
1/4 74C266
FAULT
100k
U
1
0
0
1
W
†
FAULT
TO P
10k
XNOR Status and 12 A Standby Current
FROM
P, ETC.
U
+
**
*
†
1 F
50V
LIMITS V
FURTHER DETAIL.
OPTIONAL OPEN LOAD DETECTION REQUIRES 10k PULL-UP RESISTORS.
(ULTRA LOW STANDBY QUIESCENT CURRENT IS SACRIFICED)
POWER FROM 5V LOGIC SUPPLY.
DS1
G1
IN1
LTC1255
GND
V
S
S
TRANSIENTS TO <40V. SEE MANUFACTURER DATA SHEET FOR
100
DS2
IN2
G2
P, ETC.
FROM
FROM
P, ETC.
MR2535L*
Figure 9. Overvoltage Transient Protection
*OPTIONAL OVERVOLTAGE (30V) LATCH-OFF COMPONENTS
14V
FAULT
TO P
10k
10k
+
1/4 74C266
100k
IN1
1 F
50V
1/2 LTC1255
GND
†
V
S
100
1N5400
DS1
12V
MMBZ5242B
G1
LTC1255 • TA03
30V*
1N5256B
1N5242B
D1
MR2535L
12V
1k*
LTC1255 • F09
MTD3055E
0.036
14V/1A
SOLENOID
LOAD
IRF530
R
0.036
SENSE
10k**