LTC1153CS8 Linear Technology, LTC1153CS8 Datasheet - Page 6

• Manufacturer Part Number: LTC1153CS8
• Description: IC ELECTR CIRCUIT BREAKER 8-SOIC
• Manufacturer: Linear Technology

Specifications of LTC1153CS8

• Applications: Overvoltage Protection, Circuit Breaker
• Current - Supply: 180µA
• Voltage - Supply: 4.5 V ~ 18 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

LTC1153
PI FU CTIO S
Drain Sense Pin
The drain sense pin is compared against the supply pin
voltage. If the voltage at this pin is more than 100mV
below the supply pin, the input latch will trip and the
MOSFET switch will be turned off.
This pin is also a high impedance CMOS gate with ESD
protection and therefore should not be forced beyond the
power supply rails.
Some loads, such as large supply capacitor, lamps, or
motors require high inrush currents. An RC time is added
between the sense resistor and the drain sense pin to
ensure that the drain sense circuitry does not false trigger
BLOCK
6
STATUS
TIMER
INPUT
CAP
U
U
LOW STANDBY
TTL-TO-CMOS
REGULATOR
AUTO-RESET
CONVERTER
I D AGRA
CURRENT
TIMER
GND
V
S
U
W
ANALOG
ANALOG SECTION
REGULATORS
REFERENCE
VOLTAGE
100mV
DIGITAL
COMP
SHOT
ONE
FAULT DETECTION
OUTPUT DRIVER
AND STATUS
DELAY
10 s
during start-up. This trip delay can be set from a few
microseconds to many seconds. However, very long de-
lays may put the MOSFET switch in risk of being destroyed
by a short-circuit condition. (see Applications Information
Section).
Status Pin
The status pin is an open-drain output which is driven low
whenever the breaker is tripped. A 51k pull-up resistor
should be connected between this output and a logic
supply. The status pins of multiple LTC1153s can be OR’d
together if independent fault sensing is not required. No
connection is required to this pin when not in use.
R
S
LATCH
INPUT
AND DISCHARGE
CONTROL LOGIC
TTL-TO-CMOS
GATE CHARGE
AND CHARGE
OSCILLATOR
CONVERTER
SHUTDOWN
PUMP
GATE CHARGE
FAST/SLOW
LOGIC
DRAIN
SENSE
SHUTDOWN
GATE
LTC1153 • BD01