TPS79425DGNT datasheet(6/23 Pages) TI1

Part #	TPS79425DGNT

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

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IOUT = 10 mA

IOUT = 250 mA

VIN = 4.3 V,

VOUT = 3.3 V,

CIN = 1 µF,

COUT = 2.2 µF,

CNR = 0.01 µF

40

20

10

100

1 k

10 k

60

70

Frequency (Hz)

90

100 k

1 M

10 M

0

30

50

80

IOUT = 10 mA

IOUT = 250 mA

VIN = 4.3 V,

VOUT = 3.3 V,

CIN = 1 µF,

COUT = 10 µF,

CNR = 0.01 µF

40

20

10

100

1 k

10 k

60

70

Frequency (Hz)

90

100 k

1 M

10 M

0

30

50

80

IOUT = 10 mA

IOUT = 250 mA

VIN = 4.3 V,

VOUT = 3.3 V,

CIN = 1 µF,

COUT = 2.2 µF,

CNR = 0.1 µF

40

20

10

100

1 k

10 k

60

70

Frequency (Hz)

90

100 k

1 M

10 M

0

30

50

80

0

250

−50

0

50

0

30

60

90

120

150

180

210

Time (

µs)

VIN = 4.3 V,

COUT = 10 µF

di

dt +

0.02A

ms

V_Enable

3

Time (

µs)

0

240

160

80

320 400

560

480

640 720 800

1

2

0

2

4

CNR = 0.0047 µF

VIN = 4.3 V,

VOUT = 3.3 V,

IOUT = 250 mA,

COUT = 2.2 µF

CNR = 0.001 µF

Time (

µs)

−30

−20

−10

0

10

4.5

5.0

5.5

6.0

0

100

200

300

400

500

IOUT = 250 mA,COUT = 10 µF,

CNR = 0.1 µF, dv/dt = 1 V/µs

0

50

100

150

200

0

250

TA = 125°C

TA = 25°C

TA = −40°C

IOUT (mA)

25 50

75 100 125 150 175 200 225

0

50

100

150

200

250

2.5

3.5

4.0

TA = 125°C

TA = 25°C

VIN (V)

COUT = 10 µF,

CNR = 0.01 µF,

IOUT = 250 mA

3.0

4.5

5.0

TA = −40°C

−0.5

0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

0

1.4

2.8

4.2

5.6

7.0

8.4

9.8

VOUT

VIN

t (ms)

VOUT = 2.5 V,

RL = 10 Ω

TPS794xx

SLVS349E – NOVEMBER 2001 – REVISED DECEMBER 2005

TYPICAL CHARACTERISTICS (continued)

TPS79433

RIPPLE REJECTION

vs FREQUENCY

Figure 11.

Figure 12.

Figure 13.

TPS79433

OUTPUT VOLTAGE,

TPS79433

ENABLE VOLTAGE

LINE TRANSIENT

LOAD TRANSIENT

vs TIME (START-UP)

RESPONSE

Figure 14.

Figure 15.

Figure 16.

TPS79425

TPS79433

TPS79401

POWER-UP/

DROPOUT VOLTAGE

POWER-DOWN

vs OUTPUT CURRENT

vs INPUT VOLTAGE

Figure 17.

Figure 18.

Figure 19.

6

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