TPS749XX datasheet(9/26 Pages) TI

No. de pieza	TPS749XX

Descripción Electrónicos	3.0A Low Dropout Linear Regulator with Programmable Soft-Start

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TYPICAL CHARACTERISTICS

100mV/div

1V/div

Time(50 s/div)

m

C

=2.2 F(Ceramic)

OUT

m

C

=10 F(Ceramic)

OUT

m

5.0V

1V/ s

m

3.3V

C

=1nF

SS

100mV/div

1V/div

Time(50 s/div)

m

C

=10 F(Ceramic)

OUT

m

3.8V

1V/ s

m

1.8V

C

=1nF

SS

100mV/div

2A/div

Time(50 s/div)

m

C

=22 F(Ceramic)

OUT

m

C

=100 F(Ceramic)

OUT

m

C

=470 F(OSCON)

OUT

m

50mA

3A

1A/ s

m

C

=1nF

SS

0.5V/div

V

OUT

V

EN

1V/div

Time(1ms/div)

C

SS =2.2nF

C

SS =1nF

C

SS =0nF

1.2V

0V

Time(20ms/div)

V

(500mV/div)

PG

V

OUT

V

=V

IN

BIAS

EN

TPS749xx

SBVS082B – JUNE 2007 – REVISED OCTOBER 2007

At TJ = +25°C, VIN = VOUT(TYP) + 0.3V, VBIAS = 5V, IOUT = 1A, VEN = VIN = 1.8V, VOUT = 1.5V, CIN = 1μF, CBIAS = 4.7μF, and

COUT = 10μF, unless otherwise noted.

VBIAS LINE TRANSIENT

VIN LINE TRANSIENT

Figure 20.

Figure 21.

OUTPUT LOAD TRANSIENT RESPONSE

TURN-ON RESPONSE

Figure 22.

Figure 23.

POWER-UP/POWER-DOWN

Figure 24.

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