LT1763CS8-3#TRPBF Linear Technology, LT1763CS8-3#TRPBF Datasheet - Page 19

IC LDO REG LOW NOISE 3V 8-SOIC

LT1763CS8-3#TRPBF

Manufacturer Part Number
LT1763CS8-3#TRPBF
Description
IC LDO REG LOW NOISE 3V 8-SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LT1763CS8-3#TRPBF

Regulator Topology
Positive Fixed
Voltage - Output
3V
Voltage - Input
Up to 20V
Voltage - Dropout (typical)
0.3V @ 500mA
Number Of Regulators
1
Current - Output
500mA
Current - Limit (min)
520mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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APPLICATIONS INFORMATION
The top resistor of the resistor divider must be chosen to
limit the current into the ADJ pin to less than 5mA when
the ADJ pin is at 7V. The 13V difference between output
and ADJ pin divided by the 5mA maximum current into the
ADJ pin yields a minimum top resistor value of 2.6k.
In circuits where a backup battery is required, several
different input/output conditions can occur. The output
voltage may be held up while the input is either pulled
to ground, pulled to some intermediate voltage or is left
open-circuit. Current fl ow back into the output will follow
the curve shown in Figure 7.
100
90
80
70
60
50
40
30
20
10
0
0
Figure 7. Reverse Output Current
T
V
CURRENT FLOWS
INTO OUTPUT PIN
V
J
IN
OUT
LT1763-3
LT1763-2.5
= 25°C
1
= 0V
LT1763-1.8
= V
2
ADJ
OUTPUT VOLTAGE (V)
3
(LT1763)
LT1763
4
5
When the IN pin of the LT1763-X is forced below the OUT
pin, or the OUT pin is pulled above the IN pin, input cur-
rent will typically drop to less than 2μA. This can happen
if the input of the device is connected to a discharged
(low voltage) battery and the output is held up by either
a backup battery or a second regulator circuit. The state
of the SHDN pin will have no effect on the reverse output
current when the output is pulled above the input.
LT1763-3.3
6
7
LT1763-1.5
LT1763-5
8
9
1763 F07
10
LT1763 Series
19
1763fg

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