4

LT1460S3 (SOT-23)

2.5V Minimum Input-Output

Voltage Differential

2.5V Load Regulation, Sourcing

2.5V Load Regulation, Sinking

ELECTRICAL CHARACTERISTICS

Note 6: Load regulation is measured on a pulse basis from no load to the

specified load current. Output changes due to die temperature change

must be taken into account separately.

Note 7: Thermal regulation is caused by die temperature gradients created

by load current or input voltage changes. This effect must be added to

normal line or load regulation. This parameter is not 100% tested.

Note 8: Excludes load regulation errors.

Note 9: Peak-to-peak noise is measured with a single pole highpass filter

at 0.1Hz and 2-pole lowpass filter at 10Hz. The unit is enclosed in a still-air

environment to eliminate thermocouple effects on the leads. The test time

is 10 sec. RMS noise is measured with a single pole highpass filter at

10Hz and a 2-pole lowpass filter at 1kHz. The resulting output is full wave

rectified and then integrated for a fixed period, making the final reading an

average as opposed to RMS. A correction factor of 1.1 is used to convert

from average to RMS and a second correction of 0.88 is used to correct

for the nonideal bandpass of the filters.

Note 10: Long-term stability typically has a logarithmic characteristic and

therefore, changes after 1000 hours tend to be much smaller than before

that time. Total drift in the second thousand hours is normally less than

one third that of the first thousand hours with a continuing trend toward

reduced drift with time. Long-term stability will also be affected by

differential stresses between the IC and the board material created during

board assembly.

Note 11: Hysteresis in output voltage is created by package stress that

differs depending on whether the IC was previously at a higher or lower

temperature. Output voltage is always measured at 25

°C, but the IC is

cycled to 70

°C or 0°C before successive measurements. Hysteresis is

roughly proportional to the square of the temperature change. Hysteresis

is not normally a problem for operational temperature excursions where

the instrument might be stored at high or low temperature. See

Applications Information.

Characteristic curves are similar for most

LT1460S3s. Curves from the LT1460S3-2.5 and the LT1460-10 represent the extremes of the voltage options. Characteristic curves for

other output voltages fall between these curves, and can be estimated based on their voltage output.

INPUT-OUTPUT VOLTAGE (V)

0

0.1

10

125

°C

25

°C

100

0.5

1.0

1.5

2.0

2.5

1460S3 G01

1

–55

°C

OUTPUT CURRENT (mA)

0.1

– 2.0

– 1.0

0

1

10

100

1460s3 G02

– 3.0

– 2.5

– 1.5

– 0.5

– 3.5

– 4.0

–55

°C

25

°C

125

°C

OUTPUT CURRENT (mA)

0

0

20

40

60

80

100

120

123

4

–55

°C

1460S3 G03

5

125

°C

25

°C