LTC1258CS8 datasheet(5/8 Pages) LINER

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LTC1258 Series

PIN FUNCTIONS

OUT (Pin 1): Reference Output. The output can source up

to 10mA and sink up to 2mA. It is stable with output bypass

capacitor ranging from 0

µF to 1µF.

IN (Pin 2): Positive Supply. Bypassing with a 0.1

µF

capacitor is recommended if the output loading changes.

(VOUT + 0.2V) ≤ VIN ≤ 12.6V.

DNC (Pin 3): (LTC1258-2.5/LTC1258-3/LTC1258-4.1/

LTC1258-5) Do Not Connect. Connected internally for

post package trim. This pin must be left unconnected.

FB (Pin 3): (LT1258) Resistor Divider Feedback Pin.

Connect a resistor divider from OUT to GND and the center

tap to FB. This pin sets the output potential.

OUT =









2 385

.; R1 is connected from OUT

to FB and R2 from FB to GND.

GND (Pin 4): Negative Supply or Ground Connection.

DNC (Pins 5, 6, 7, 8): Do Not Connect. Connected

internally for post package trim. These pins must be left

unconnected.

BLOCK DIAGRAM

–

1258 BD

OUT

3 (LTC1258)

2.385V

GND

NOTE: R1 AND R2 ARE NOT CONNECTED FOR LTC1258

LTC1258-2.5 PSRR vs Frequency

µV/DIV

1258 G10

1SEC/DIV

VIN = 2.7V

LTC1258-2.5 0.1Hz to 10Hz Noise

FREQUENCY (Hz)

10k

1258 G09

100

VIN = 2.7V

TYPICAL PERFORMANCE CHARACTERISTICS

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