LT6654

6

6654fc

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: If the parts are stored outside of the specified temperature range,

the output may shift due to hysteresis.

Note 3: Temperature coefficient is measured by dividing the maximum

change in output voltage by the specified temperature range.

Note 4: 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 5: Excludes load regulation errors.

Note 6: Peak-to-peak noise is measured with a 1-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 seconds. RMS noise is measured on a spectrum analyzer in

a shielded environment where the intrinsic noise of the instrument is

removed to determine the actual noise of the device.

Note 7: 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 8: 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 the hot or cold temperature limit before successive

measurements. Hysteresis measures the maximum output change for the

averages of three hot or cold temperature cycles. For instruments that

are stored at well controlled temperatures (within 20 or 30 degrees of

operational temperature), it is usually not a dominant error source. Typical

hysteresis is the worst-case of 25°C to cold to 25°C or 25°C to hot to

25°C, preconditioned by one thermal cycle.

Note 9: The stated temperature is typical for soldering of the leads during

manual rework. For detailed IR reflow recommendations, refer to the

Applications Information section.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Long-Term Drift of Output Voltage (Note 7)

LT6654S6

LT6654LS8

60

15

ppm/√kHr

ppm/√kHr

Hysteresis (Note 8)

S6

ΔT = 0°C to 70°C

ΔT = –40°C to 85°C

ΔT = –40°C to 125°C

ΔT = –55°C to 125°C

LS8

ΔT = 0°C to 70°C

ΔT = –40°C to 85°C

ΔT = –40°C to 125°C

ΔT = –55°C to 125°C

15

30

40

50

3

11

15

20

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

The

ELECTRICAL CHARACTERISTICS