TPS70745, TPS70748, TPS70751, TPS70758, TPS70702

DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS

WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS

SLVS291 – MAY 2000

18

POST OFFICE BOX 655303

TYPICAL CHARACTERISTICS

Figure 32

IO – Output Current – mA

TYPICAL REGION OF STABILITY

vs

OUTPUT CURRENT

0.1

0.01

0

50

100

150

200

250

10

1

VO = 3.3 V

CO = 10 µF

TJ = 25°C

REGION OF INSTABILITY

REGION OF INSTABILITY

50 m

Ω

Figure 33

IO – Output Current – mA

TYPICAL REGION OF STABILITY

vs

OUTPUT CURRENT

0

50

100

150

200

250

REGION OF INSTABILITY

0.1

10

1

250 m

Ω

VO = 3.3 V

CO = 6.8 µF

TJ = 25°C

REGION OF INSTABILITY

Figure 34

IO – Output Current – mA

TYPICAL REGION OF STABILITY

vs

OUTPUT CURRENT

0.1

0.01

0

25

50

75

100

125

10

1

REGION OF INSTABILITY

50 m

Ω

REGION OF INSTABILITY

VO = 1.8 V

CO = 10 µF

TJ = 25°C

Figure 35

IO – Output Current – mA

TYPICAL REGION OF STABILITY

vs

OUTPUT CURRENT

0

25

50

75

100

125

REGION OF INSTABILITY

0.1

1

VO = 1.8 V

CO = 6.8 µF

TJ = 25°C

10

REGION OF INSTABILITY

250 m

Ω

† Equivalent series resistance (ESR) refers to the total series resistance, including the ESR of the capacitor, any series resistance added

externally, and PWB trace resistance to CO.