TPS79018DBVT datasheet(8/20 Pages) TI1

8 / 20 page

TPS79015, TPS79018, TPS79025, TPS79028, TPS79030

ULTRALOW-POWER LOW-NOISE 50-mA

LOW-DROPOUT LINEAR REGULATORS

SLVS299B – SEPTEMBER 2000 – REVISED MAY 2001

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

100

10k

100k

f – Frequency – Hz

VI = 4 V

Co = 10 µF

C(byp) = 0.1 µF

TPS79030

OUTPUT SPECTRAL NOISE DENSITY

FREQUENCY

IO = 50 mA

100

200

300

400

500

600

700

IO = 1 mA

Figure 9

Figure 10

200

400

600

800

1000

1200

1400

1600

1800

100

10k

100k

C(byp) = 0.001 µF

C(byp) = 0.01 µF

C(byp) = 0.1 µF

f – Frequency – Hz

TPS79030

OUTPUT SPECTRAL NOISE DENSITY

FREQUENCY

VI = 4 V

IO = 50 mA

Co = 10 µF

150

100

0.00001

0.0001

0.001

0.01

200

250

ROOT MEAN SQUARED OUTPUT NOISE

BYPASS CAPACITANCE

300

0.1

C(bypass) – Bypass Capacitance – µF

VO = 3 V

VO = 1.5 V

Figure 11

Co = 10 µF

Figure 12

100

f – Frequency – Hz

10k

OUTPUT IMPEDANCE

FREQUENCY

1.6

0.2

1.4

0.4

1.8

0.6

1.2

0.8

100k

VI = 4 V

Co = 10 µF

TJ = 25°C

IO = 50 mA

IO = 1 mA

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