TPS77012DBVT datasheet(10/16 Pages) TI

10 / 16 page

TPS77001, TPS77012, TPS77015, TPS77018, TPS77025

TPS77027, TPS77028, TPS77030, TPS77033, TPS77050

ULTRA LOW-POWER 50-mA LOW-DROPOUT LINEAR REGULATORS

SLVS210C – JUNE 1999 – REVISED SEPTEMBER 1999

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 17

025

100

IO – Output Current – mA

TPS77033

TYPICAL REGIONS OF STABILITY

EQUIVALENT SERIES RESISTANCE (ESR)†

OUTPUT CURRENT

VIN = 4.3 V

CO = 4.7 µF

ESR = 0.3

Ω

3.3 V LDO

1015

3035

Region of Instability

Region of Stability

0.1

Figure 18

0.1

0.2

0.3

0.4

0.5

Added Ceramic Capacitance –

µF

0.6

0.7 0.8

0.9

100

Region of Instability

Region of Stability

VIN = 4.3 V

CO = 4.7 µF

IL = 50 mA

TPS77033

TYPICAL REGIONS OF STABILITY

EQUIVALENT SERIES RESISTANCE (ESR)

ADDED CERAMIC CAPACITANCE

Figure 19

IO – Output Current – mA

025

100

TPS77033

TYPICAL REGIONS OF STABILITY

EQUIVALENT SERIES RESISTANCE (ESR)†

OUTPUT CURRENT

VIN = 4.3 V

CO = 10 µF

ESR = 0.3

Ω

3.3 V LDO

354045

Region of Stability

Region of Instability

Figure 20

Added Ceramic Capacitance –

µF

0.1

0.2

0.3

0.4

0.5

0.6

0.7 0.8

0.9

100

Region of Instability

Region of Stability

VIN = 4.3 V

CO = 10 µF

IL = 50 mA

TPS77033

TYPICAL REGIONS OF STABILITY

EQUIVALENT SERIES RESISTANCE (ESR)

ADDED CERAMIC CAPACITANCE

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