LTC1798CS8-3 Linear Technology, LTC1798CS8-3 Datasheet - Page 5

• Manufacturer Part Number: LTC1798CS8-3
• Description: IC REF LDO BANDGAP MCRPWR 8SOIC
• Manufacturer: Linear Technology

Specifications of LTC1798CS8-3

• Reference Type: Series
• Voltage - Output: 3V
• Tolerance: ±0.15%
• Temperature Coefficient: 40ppm/°C
• Voltage - Input: 3.2 ~ 12.6 V
• Number Of Channels: 1
• Current - Quiescent: 6.5µA
• Current - Output: 10mA
• 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
• Current - Cathode: -

TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
DNC (Pins 1, 5, 7, 8): Do Not Connect. Connected
internally for post package trim. These pins must be left
unconnected.
IN (Pin 2): Positive Supply. Bypassing with a 0.1µF capaci-
tor is recommended if the output loading changes. (V
+ 0.2V) ≤ V
DNC (Pin 3): (LTC1798-2.5/LTC1798-3/LTC1798-4.1/
LTC1798-5) Do Not Connect. Connected internally for post
package trim. This pin must be left unconnected.
FB (Pin 3): (LTC1798) Resistor Divider Feedback Pin.
Connect a resistor divider from OUT to GND and the center
tap to FB. This pin sets the output potential.
5µV/DIV
LTC1798-2.5
0.1Hz to 10Hz Noise
V
IN
= 2.7V
IN
≤ 12.6V.
1SEC/DIV
1798 G10
1400
1200
1000
800
600
400
200
0
0
LTC1798-5 Input Current
vs Input Voltage in Dropout
1
T
A
2
= –55°C
OUT
INPUT VOLTAGE (V)
3
4
GND (Pin 4): Negative Supply or Ground Connection.
OUT (Pin 6): Reference Output. The output can source
up to 10mA and sink up to 2mA. It is stable with output
bypass capacitor ranging from 0µF to 1µF .
5
to FB and R2 from FB to GND. Selecting R2 ≥ 10k will
make I
T
T
V
6
A
A
OUT
= 25°C
= 125°C
7
=
8
OUT
2 385
1798 G11
9
.
< 250µA.
10
V



R
1
250
200
150
100
R
50
+
0
2
R
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
LTC1798-2.5 Input Current
vs Input Voltage in Dropout
LTC1798 Series
2



T
;
A
= 125°C
R1 is connected from OUT
INPUT VOLTAGE (V)
T
T
A
A
= 25°C
= –55°C
1798 G12
1798fc
5