6.6 Typical Characteristics (continued)

at operating temperature TJ = 25°C, VIN = VOUT(NOM) + 1.0 V or 2.5 V (whichever is greater), IOUT = 1 mA, ON/OFF pin tied to

VIN, CIN = 1.0 µF, and COUT = 4.7 µF (unless otherwise noted)

IOUT (mA)

0

20

40

60

80

100

120

140

160

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

VI = 4.3 V

VO = 3.3 V

CO = 4.7uF

Temperature

-55 °C

-40 °C

0 °C

25 °C

85 °C

125 °C

150 °C

Figure 6-7. Output Regulation vs Load Current for New Chip

VIN (V)

4

6

8

10

12

14

16

-2

-1.5

-1

-0.5

0

0.5

1

1.5

VO = 3.3 V

Iout= 1mA

CO = 4.7uF

Temperature

-55

C

-40

C

0

C

25

C

85

C

125

C

150

C

Figure 6-8. Output Regulation vs Input Voltage for New Chip

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

−500

0

500

1000

1500

2000

Time − (ms)

VI = 6 V

VO = 3.3 V

Ci = 1 mF

Cbyp = 0.01 mF

Figure 6-9. Short-Circuit Current vs Time for Legacy Chip

200

s/div

0

200

400

600

800

1000

-6

-600

-5

0

-4

600

-3

1200

-2

1800

-1

2400

0

3000

1

3600

2

4200

3

4800

4

5400

5

6000

VIN = 6 V

Cbyp = 10 nF

VO = 3.3 V

VO

I SC

VIN = 6 V

Figure 6-10. Short-Circuit Current vs Time for New Chip

−100

100

300

500

700

Time − (ms)

VI = 16 V

VO = 3.3 V

Ci = 1 mF

Cbyp = 0.01 mF

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

Figure 6-11. Short-Circuit Current vs Time for Legacy Chip

200

s/div

0

200

400

600

800

1000

-6

-600

-5

0

-4

600

-3

1200

-2

1800

-1

2400

0

3000

1

3600

2

4200

3

4800

4

5400

5

6000

VIN = 16 V

Cbyp = 10 nF

VO = 3.3 V

VO

I SC

Figure 6-12. Short-Circuit Current vs Time for New Chip

LP2985, LP2985A

SLVS522R – JULY 2004 – REVISED JULY 2023

www.ti.com

10

Submit Document Feedback

Copyright © 2023 Texas Instruments Incorporated

Product Folder Links: LP2985 LP2985A