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Phase Shift

(Right Scale)

Closed-Loop Gain

(Left Scale)

VCC = 5 V

Cref = 470 pF

TA = 25°C

50

30

20

0

70

40

100

1 k

10 k

100 k

1 M

60

f − Frequency − Hz

10

0

°

−10

°

−20

°

−30

°

−40

°

−50

°

−60

°

−70

°

−80

°

−90

°

Cref

Vref

39 k

Ω

39 k

Ω

+

−

Test Circuit

60

40

20

0

0

5

10

80

100

Collector Output Saturation Voltage − V

120

15

20

110

90

70

50

30

10

TA = −20°C

TA = 25°C

VCC = 3.6 V

TA = 85°C

TL1451A-EP

DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS

SLVS614 – DECEMBER 2005

TYPICAL CHARACTERISTICS (continued)

Figure 22. Closed-Loop Gain and Phase Shift vs Frequency

Figure 23. Output Sink Current vs Collector Output Saturation Voltage

16