VREG5(100mV/div)

VO1(100mV/div)

2ms/div

–20

20

40

80

–40

0

60

100

1 k

10 k

100 k

1 M

f – Frequency – Hz

–180

45

45

90

180

–90

0

135

–135

–80

–60

V

O= 3.3 V

V

I = 12 V

I

O = 8 A

Phase

Gain

0

2

6

10

12

I

OUTx – Output Current – A

4

8

1.5

2.5

3.0

1.0

2.0

0

0.5

V

IMON1

V

IMON2

TPS51222

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

TYPICAL CHARACTERISTICS (continued)

3.3-V BODE-PLOT – GAIN AND PHASE

vs

FREQUENCY

5.0-V SWITCH-OVER WAVEFORMS

Figure 29.

Figure 30.

CURRENT MONITOR VOLTAGE

vs

OUTPUT CURRENT

Figure 31.

16

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