TPS71247DRCT datasheet(7/21 Pages) TI

Part #	TPS71247DRCT

Description	Dual 250 mA Output, UltraLow Noise, High PSRR, Low-Dropout Linear Regulator

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V

OUT2

V

OUT1

I

OUT1

2 mV/div

100 mV/div

200 mA/div

20

µs/div

250 mA

10 mA

C

OUT2 = 10 µF

C

OUT1 = 10 µF

60

50

40

30

20

10

0

0.1

1

10

100

1k

Frequency (Hz)

C

OUT1 = COUT2 = 10 µF

I

OUT1 = 0 mA to 500 mA Sinusoidal Load

I

OUT2 = 25 mA

50 ms/div

V

IN

V

OUT1

V

OUT2

I

OUT1 = IOUT2 = 250 mA

20 mV/div

1 V/div

V

OUT2

V

OUT1

V

EN1

50

µs/div

C

NR = 0.001 µ F

C

NR = 0.01 µ F

I

OUT1 = IOUT2 = 250 mA

C

OUT1 = COUT 2 = 10 µF

250

200

150

100

50

0

1

10

100

1k

10k

100k

C

NR (pF)

C

OUT = 2.2 µF

I

OUT = 250 mA

C

OUT = 10 µF

I

OUT = 250 mA

C

OUT = 2.2 µF

I

OUT = 0 mA

C

OUT = 10 µF

I

OUT = 0 mA

V

OUT = 2.8 V

350

300

250

200

150

100

50

0

100

1k

10k

100k

Frequency (Hz)

I

OUT = 250 mA

C

NR = 0.1 µF

V

OUT = 2.8 V

I

OUT = 1 mA

TPS71202, TPS71219

TPS71229, TPS71247

TPS71256, TPS71257

www.ti.com

SBVS049D – MAY 2004 – REVISED AUGUST 2010

TYPICAL CHARACTERISTICS (continued)

For all voltage versions at TJ = 25°C, VIN = VOUT(nom) + 1 V, IOUT = 1 mA,VEN = 1.2 V, COUT = 2.2 mF, and CNR = 0.01 mF,

unless otherwise noted.

TPS71256

LOAD TRANSIENT RESPONSE

TPS71256

AND VOUT2 CROSSTALK

CHANNEL-TO-CHANNEL ISOLATION vs FREQUENCY

Figure 13.

Figure 14.

TPS71256

TURN-ON/OFF RESPONSE

TPS71229

AND VOUT2 CROSSTALK

POWER-UP/POWER-DOWN

Figure 15.

Figure 16.

NOISE SPECTRAL DENSITY

TOTAL NOISE vs CNR

COUT = 2.2 mF

Figure 17.

Figure 18.

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Product Folder Link(s): TPS71202 TPS71219 TPS71229 TPS71247 TPS71256 TPS71257

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