LTC1696ES6#PBF Linear Technology, LTC1696ES6#PBF Datasheet - Page 7

• Manufacturer Part Number: LTC1696ES6#PBF
• Description: IC, OVERVOLTAGE PROTECTION CTRL, SOT23-6
• Manufacturer: Linear Technology

Specifications of LTC1696ES6#PBF

• Input Voltage: 17V
• Output Voltage: 6.3V
• No. Of Outputs: 1
• Supply Voltage Range: 2.7V To 27V
• No. Of Pins: 6
• Operating Temperature Range: -40°C To +85°C
• Termination Type: SMD
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PI FU CTIO S
FB1 (Pin 1): First Feedback Input. FB1 monitors and
senses the first supply output voltage through an external
resistor divider. This voltage is then compared with an
internal reference voltage of 0.88V, which sets the thresh-
old for an overvoltage fault detection. If the sense voltage
exceeds the threshold level, the output response time at
the OUT pin is dependent on the feedback overdrive above
the threshold level. The higher the feedback overdrive, the
faster will be the response time.
GND (Pin 2): Power Ground. Return path for all device
currents.
V
rately from the power supply output that the chip is
monitoring. Its input range is from 2.7V to 27V. The
quiescent current is typically 100 A in standby mode
when the device is operating at 5V. The quiescent current
increases to 170 A when operating at 12V.
OUT (Pin 4): Output Current Limit Driver. Capable of
delivering continuous current, typically 80mA, at high
supplies. The output current decreases with lower supply
voltage. This pin directly drives the SCR crowbar at high
supply voltage. It can also provide gate drive for an
N-channel MOSFET or the base of an NPN transistor,
which drives the gate of an external SCR at low supply
voltage. It is normally in the inactive low state in the
standby mode. In the event of an overvoltage fault condi-
tion, the OUT pin is latched into the active high state. The
latched active high state is reset by pulling the TIMER/
RESET pin low through an N-channel MOSFET switch or if
the supply voltage at the V
age lockout threshold voltage of 1.94V.
CC
U
(Pin 3): Power Supply. The pin is connected sepa-
U
U
CC
pin goes below the undervolt-
FB2 (Pin 5): Second Feedback Input. FB2 monitors and
senses the second supply output voltage through an
external resistor divider. This voltage is then compared
with an internal reference voltage of 0.88V, which sets the
threshold for an overvoltage fault detection. If the sense
voltage exceeds the threshold level, the output response
time at the OUT pin is dependent on the feedback overdrive
above the threshold level. The higher the feedback over-
drive, the faster will be the response time.
TIMER/RESET (Pin 6): Glitch Filter Timer Capacitor, Reset
and External Trigger Input. The external capacitor con-
nected to this pin programs the internal glitch filter time
delay. The internal current source used to charge the timer
capacitor is typically 10 A with feedback overdrive of less
than 20mV above the feedback trip threshold from one
feedback input. The current source increases to 12 A
when the feedback overdrive increases to more than
100mV. It further increases to 18 A if larger overdrive
occurs from both feedback inputs. The default glitch filter
time delay without an external timer capacitor is fixed by
an internal capacitor of 5pF with the internal reference
voltage of 1.185V. The delay reduces with increases in first
and second feedback input overdrive. This pin also serves
as a reset input to clear the internal latch during an
overvoltage fault condition. If pulled low, it resets the
active high state of the internal latch. The reset signal to
this pin should be an open drain type. This pin can also be
driven high externally to activate the OUT pin active high
if the FB1 and FB2 voltages remain below the feedback trip
threshold.
LTC1696
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