TPS79430DCQR datasheet(5/23 Pages) TI1

Part #	TPS79430DCQR

Description	ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 250-mA LOW-DROPOUT LINEAR REGULATORS

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TYPICAL CHARACTERISTICS

150

155

160

165

170

175

180

185

190

IOUT = 1 mA

VIN = 3.8 V,

COUT = 10 µF

TJ (°C)

IOUT = 250 mA

−40 −25 −10 5

20 35 50 65 80 95 110 125

3.250

3.255

3.260

3.265

3.270

3.275

3.280

3.285

3.290

0

50

100

200

250

IOUT (mA)

2.765

2.770

2.775

2.780

2.785

2.790

2.800

−40 −25 −10 5

20 35 50 65 80 95 110 125

TJ (°C)

2.795

IOUT = 1 mA

IOUT = 200 mA

VIN = 3.8 V

COUT = 10 µF

0

0.05

0.10

0.15

0.20

0.25

0.30

0.35

IOUT = 250 mA

IOUT = 1 mA

COUT = 2.2 µF,

CNR = 0.1 µF,

VIN = 3.8 V

Frequency (Hz)

100

1000

10000

100000

0

0.2

0.4

0.6

0.8

1.2

1.4

1.6

100

1000

10000

100000

COUT = 10 µF,

IOUT = 250 mA

VIN = 3.8 V

Frequency (Hz)

CNR = 0.1 µF

CNR = 0.01 µF

CNR = 0.0047 µF

CNR = 0.001 µF

1.0

1.8

0

0.05

0.10

0.15

0.20

0.25

0.30

0.35

IOUT = 250 mA

IOUT = 1 mA

COUT = 10 µF,

CNR = 0.1 µF,

VIN = 3.8 V

Frequency (Hz)

100

1000

10000

100000

0

10

20

30

40

50

60

0.001

0.0047

0.1

CNR (µF)

0.01

IOUT = 250 mA,

COUT = 10 µF

0

50

100

150

200

250

TJ (°C)

−40 −25 −10 5

20 35 50 65 80 95 110 125

IOUT = 1 mA

IOUT = 250 mA

VIN = 3.8 V,

COUT = 10 µF

0.100

0.020

10

100

1 k

10 k

1

10

100 k

1 M

10 M

IOUT = 1 mA

IOUT = 250 mA

VIN = 4.3 V,

COUT = 10 µF,

Frequency (Hz)

TPS794xx

SLVS349E – NOVEMBER 2001 – REVISED DECEMBER 2005

TPS79433

TPS79428

OUTPUT VOLTAGE

GROUND CURRENT

vs OUTPUT CURRENT

vs JUNCTION TEMPERATURE

Figure 2.

Figure 3.

Figure 4.

TPS79428

OUTPUT SPECTRAL

NOISE DENSITY

vs FREQUENCY

Figure 5.

Figure 6.

Figure 7.

TPS79428

TPS79433

TPS79428

ROOT MEAN SQUARED

OUTPUT IMPEDANCE

DROPOUT VOLTAGE

OUTPUT NOISE vs CNR

vs FREQUENCY

vs JUNCTION TEMPERATURE

Figure 8.

Figure 9.

Figure 10.

5

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