0.1

0.01

10

1

0

0.2

REGIONOFINSTABILITY

0.1

0.3

0.4 0.5

0.6 0.7

0.8 0.9

1

V

=3.3V

OUT1

C

=220 F

m

O

15mW

I

OutputCurrent

-

-

O

A

0.1

0.01

10

1

0

0.2

REGIONOFINSTABILITY

0.1

0.3

0.4 0.5

0.6 0.7

0.8 0.9

1

V

=3.3V

OUT1

C

=22 F

m

O

50mW

I

OutputCurrent

-

-

O

A

0.1

0.01

10

1

0

0.2

0.1

0.3

0.4 0.5

0.6 0.7

0.8 0.9

1

REGIONOFINSTABILITY

V

=1.8V

OUT2

C

=680 F

m

O

15mW

I

OutputCurrent

-

-

O

A

0.1

0.01

10

1

0

0.2

REGIONOFINSTABILITY

0.1

0.3

0.4 0.5

0.6 0.7

0.8 0.9

1

V

=1.8V

OUT2

C

=47 F

m

O

50mW

I

OutputCurrent

-

-

O

A

TPS70445, TPS70448

TPS70451, TPS70458

TPS70402

www.ti.com

SLVS307F – SEPTEMBER 2000 – REVISED APRIL 2010

TYPICAL CHARACTERISTICS (continued)

TYPICAL REGION OF STABILITY

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE(1)

EQUIVALENT SERIES RESISTANCE(1)

vs

vs

OUTPUT CURRENT

OUTPUT CURRENT

Figure 29.

Figure 30.

TYPICAL REGION OF STABILITY

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE(1)

EQUIVALENT SERIES RESISTANCE(1)

vs

vs

OUTPUT CURRENT

OUTPUT CURRENT

Figure 31.

Figure 32.

(1) 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.

Copyright © 2000–2010, Texas Instruments Incorporated

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