3.20

3.25

3.3

3.35

3.40

0

2

4

6

8

10

V

I = 12 V

I

REG3 – 3.3-V Linear Regulator Output Current – mA

0

20

40

60

80

100

4.90

4.95

5.00

5.05

5.10

I

REG5 – 5-V Linear Regulator Output Current – mA

V

I = 12 V

270

280

300

310

320

330

290

R

RF = 330 kW

-50

0

50

100

150

T

J – Junction Temperature – °C

0

0.05

0.10

0.15

0.20

0.25

-50

0

50

100

150

T

J – Junction Temperature – °C

TPS51222

www.ti.com............................................................................................................................................................................................... SLUS908 – JANUARY 2009

TYPICAL CHARACTERISTICS (continued)

VREG3 OUTPUT VOLTAGE

VREG5 OUTPUT VOLTAGE

vs

vs

OUTPUT CURRENT

OUTPUT CURRENT

Figure 9.

Figure 10.

SWITCHING FREQUENCY

FORWARD VOLTAGE OF BOOST SW

vs

vs

JUNCTION TEMPERATURE

JUNCTION TEMPERATURE

Figure 11.

Figure 12.

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