LT1790

11

1790fb

1.25V TYPICAL PERFORMANCE CHARACTERISTICS

TEMPERATURE (°C)

–50

1.247

1.248

1.249

1.250

1.251

–10

30

70

110

17091.25 G01

1.252

1.253

–30

10

50

90

FOUR TYPICAL PARTS

INPUT-OUTPUT VOLTAGE (V)

10

17901.25 G02

0.1

1

0.5

2.5

2

1.5

1

0

TEMPERATURE (°C)

–50

0

0.1

0.3

0.4

0.5

1.0

0.7

–10

30

50

130

17091.25 G03

0.2

0.8

0.9

0.6

–30

10

70

90 110

5mA

100μA

1mA

OUTPUT CURRENT (mA)

0.1

–2000

–1600

–1200

–800

–400

110

17901.25 G04

0

–1800

–1400

–1000

–600

–200

OUTPUT CURRENT (mA)

0.1

0

400

800

1200

1600

110

17901.25 G05

2000

200

600

1000

1400

1800

INPUT VOLTAGE (V)

60

80

100

15

17901.25 G06

40

20

50

70

90

30

10

0

5

0

10

20

Output Voltage Temperature Drift

Load Regulation (Sourcing)

Minimum Input-Output Voltage

Differential (Sourcing)

Minimum Input-Output Voltage

Differential (Sinking)

Load Regulation (Sinking)

Supply Current vs Input Voltage

Note 8: Peak-to-peak noise is measured with a single pole highpass filter

at 0.1Hz and a 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. Integrated RMS noise is measured from 10Hz to 1kHz

with the HP3561A analyzer.

Note 9: Long-term drift typically has a logarithmic characteristic and

therefore changes after 1000 hours tend to be smaller than before that

time. Long-term drift is affected by differential stress between the IC and

the board material created during board assembly. See the Applications

Information section.

Note 10: Hysteresis in the 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 85°C or –40°C before a successive measurements. Hysteresis

is roughly proportional to the square of the temperature change.

Hysteresis is not a problem for operational temperature excursions where

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

Applications Information section.

ELECTRICAL CHARACTERISTICS

Each of the voltage options have similar performance curves. For the 3V, 3.3V and the 4.096V options,

the curves can be estimated based on the 2.5V and 5V curves.