TPS76615, TPS76618, TPS76625, TPS76627

TPS76628, TPS76630, TPS76633, TPS76650, TPS76601

ULTRA LOW QUIESCENT CURRENT 250-mA LOW-DROPOUT VOLTAGE REGULATORS

SLVS237 – AUGUST 1999

13

POST OFFICE BOX 655303

TYPICAL CHARACTERISTICS

Figure 25

0.01

0.10

1.00

10.00

0

0.2

0.4

0.6

0.8

1.0

Added Ceramic Capacitance –

µF

TYPICAL REGION OF STABILITY

vs

ADDED CERAMIC CAPACITANCE

101

100

10–1

10–2

VI = 4.3 V

CO = 4.7 µF

VO = 3.3 V

IO = 250 mA

TA = 25°C

Minimum ESR

Region of Instability

Region of Stability

Figure 26

Added Ceramic Capacitance –

µF

TYPICAL REGION OF STABILITY

vs

ADDED CERAMIC CAPACITANCE

0.01

0.10

1.00

10.00

0

0.2

0.4

0.6

0.8

1.0

101

100

10–1

10–2

VI = 4.3 V

CO = 10 µF

VO = 3.3 V

IO = 250 mA

TA = 25°C

Minimum ESR

Region of Instability

Region of Stability

IN

EN

OUT

+

GND

CO

ESR

RL

VI

To Load

Figure 27. Test Circuit for Typical Regions of Stability (Figures 21 through 24) (Fixed Output Options)

† 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.