LTC2951ITS8-2#TRPBF Linear Technology, LTC2951ITS8-2#TRPBF Datasheet - Page 14
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LTC2951ITS8-2#TRPBF
Manufacturer Part Number
LTC2951ITS8-2#TRPBF
Description
IC PB ON/OFF CONTROLLER TSOT23-8
Manufacturer
Linear Technology
Datasheet
1.LTC2951CDDB-1TRMPBF.pdf
(20 pages)
Specifications of LTC2951ITS8-2#TRPBF
Applications
Push Button, On/Off Controller
Voltage - Supply
2.7 V ~ 26.4 V
Current - Supply
6µA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
TSOT-23-8, TSOT-8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
LTC2951-1/LTC2951-2
TYPICAL APPLICATIONS
Voltage Monitoring with KILL Input
The KILL pin can be used as a voltage monitor. Figure
5 shows an application where the KILL pin has a dual
function. It is driven by a low leakage open-drain output
of the µP . It is also connected to a resistor divider that
monitors battery voltage (V
falls below the set value, the voltage at the KILL pin falls
below 0.6V and the EN pin is quickly pulled low. Note
that the resistor values should be as large as possible,
but small enough to keep leakage currents from tripping
the 0.6V KILL comparator.
14
2951 F06
V
IN
V
IN
IN
2951 F05
9V
). When the battery voltage
9V
C4
0.1µF
C4
0.1µF
V
PB
GND
Figure 5. Input Voltage Monitoring with KILL Input
V
C3*
PB
0.01µF
GND
5.4V THRESHOLD
IN
IN
KILLT
LTC2951-1
KILLT
LTC2951-1
C
0.033µF
C
0.033µF
KILLT
KILLT
Figure 6. No µP Application
*
*
OFFT
KILL
INT
OFFT
EN
KILL
INT
EN
C
0.033µF
C
0.033µF
OFFT
806k
100k
OFFT
1%
1%
R3
R2
*
*
The DC/DC converter shown has an internal pull-up cur-
rent on its SHDN pin. A pull-up resistor on EN is thus not
needed.
Operation without µP
Figure 6 shows how to connect the KILL pin when there
is no circuitry available to drive it. The minimum pulse
width detected is 30µs. If there are glitches on the resis-
tor pull-up voltage that are wider than 30µs and transition
below 0.6V, then an appropriate bypass capacitor should
be connected to the KILL pin.
V
SHDN**
V
SHDN**
IN
LT1767-3.3
IN
LT1767-3.3
**SHDN INTERNALLY PULLED UP BY THE LT1767-3.3
R1
10k
**SHDN INTERNALLY PULLED UP BY THE LT1767-3.3
*OPTIONAL
*OPTIONAL
V
V
OUT
INT
KILL
(OPEN DRAIN)
OUT
+
µP
R1
100k
3.3V
C3*
0.01µF
3.3V
295112fb