TPS74301RGWRG4 datasheet(8/27 Pages) TI

Part #	TPS74301RGWRG4

Description	1.5A Ultra-LDO with Programmable Sequencing

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20mV/div

1V/div

Time(50 s/div)

m

4.3V

C

=2x470 F(OSCON)

OUT

m

C

=100 F(Cer.)

OUT

m

C

=10 F(Cer.)

OUT

m

1V/ s

m

3.3V

C

=0 F

OUT

m

4.3V

10mV/div

500mV/div

Time(50 s/div)

m

C

=2x470 F(OSCON)

OUT

m

C

=100 F(Cer.)

OUT

m

C

=10 F(Cer.)

OUT

m

C

=0 F

OUT

m

2.5V

1.5V

V

=1.2V

OUT

1V/ s

m

50mV/div

1A/div

Time(50 s/div)

m

50mA

C

=2x470 F(OSCON)

OUT

m

C

=100 F(Cer.)

OUT

m

C

=10 F(Cer.)

OUT

m

1A/ s

m

C

=0 F

OUT

m

1.5A

Time(20ms/div)

V

PG

V

TRACK

I

=500mA

OUT

V

OUT

Time(20ms/div)

V

(500mV/div)

PG

V

OUT

V

=V

IN

BIAS

EN

=V

2.85

2.65

2.45

2.25

2.05

1.85

1.65

1.45

1.25

0

0.5

1.0

I

(A)

OUT

1.5

+125 C

°

+25 C

°

-

°

40 C

TPS74301

SBVS065E – DECEMBER 2005 – REVISED MAY 2007

TYPICAL CHARACTERISTICS (continued)

At TJ = +25°C, VOUT = 1.5V, VIN = VOUT(TYP) + 0.3V, VBIAS = 3.3V, IOUT = 50mA, EN = VIN, CIN = 1µF, CBIAS = 4.7µF, and COUT = 10µF,

unless otherwise noted.

VBIAS LINE TRANSIENT

VIN LINE TRANSIENT (1.5A)

Figure 15.

Figure 16.

OUTPUT LOAD TRANSIENT RESPONSE

TRACKING RESPONSE

Figure 17.

Figure 18.

POWER-UP/POWER-DOWN

IBIAS vs IOUT AND TEMPERATURE

Figure 19.

Figure 20.

8

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