100

1k

10k

100k

1M

FREQUENCY (Hz)

IL = 1 mA

COUT = 0.47 PF

COUT = 1 PF

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

100

1k

10k

100k

1M

FREQUENCY (Hz)

ILOAD = 150 mA

COUT = 1 PF

COUT = 0.47 PF

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

TIME (100 Ps/DIV)

800

VIN = 6V

600

400

200

0

TIME (100 Ps/DIV)

3.1

2.5

CIN = 1 PF

COUT = 0.47 PF

IL = 1 to 150 mA

2

2.5

3

3.5

4

4.5

5

5.5

6

VIN

TJ = 125°C

TJ = 25°C

TJ = -40°C

20

30

40

50

60

70

80

90

100

TIME (100 Ps/DIV)

800

VIN = 2.5V

600

400

200

0

LP3990-Q1

www.ti.com

SNVSA66A – OCTOBER 2014 – REVISED DECEMBER 2015

Typical Characteristics (continued)

Unless otherwise specified, CIN = 1-µF ceramic, COUT = 0.47-µF ceramic, VIN = VOUT(NOM) + 1 V, TA = 25°C, VOUT(NOM) = 1.5 V;

VEN = VIN.

ILOAD = 150 mA

Figure 6. Short Circuit Current

Figure 5. Ground Current vs VIN

Figure 7. Short Circuit Current

Figure 8. Line Transient

Figure 10. Power Supply Rejection Ratio

Figure 9. Power Supply Rejection Ratio

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