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LTC2954CDDB-1 View Datasheet(PDF) - Linear Technology

Part Name
Description
MFG CO.
LTC2954CDDB-1
Linear
Linear Technology Linear
'LTC2954CDDB-1' PDF : 18 Pages View PDF
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LTC2954
TYPICAL APPLICATIONS
External Pull-Up Resistor On PB
An internal pull-up resistor on the PB pin makes an ex-
ternal pull-up resistor unnecessary. Leakage current on
the PB board trace, however, will affect the open circuit
voltage on the PB pin. If the leakage is too large (>2μA),
the PB voltage may fall close to the threshold window. To
mitigate the effect of the board leakage, a 10k resistor to
VIN is recommended (see Figure 9).
Reverse Battery Protection
To protect the LTC2954 from a reverse battery connec-
tion, place a 1k resistor in series with the VIN pin (see
Figure 10).
VIN
VIN
R7
10k
PB
EXTERNAL BOARD
LEAKAGE CURRENT
>2μA
IF EXTERNAL PARASITIC BOARD
LEAKAGE >2μA, USE EXTERNAL
PULL-UP RESISTOR
LTC2954-1/
LTC2954-2
2.4V
100k
GND
PINS OMITTED
FOR CLARITY
2954 F09
Figure 9. External Pull-Up Resistor On PB Pin
2954fb
14
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