SS6639 datasheet(6/12 Pages) SSC

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SS6639

n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

Output Current (mA)

100

120

140

160

0.0

0.2

0.4

0.6

0.8

1.0

1.2

Fig. 11 SS6639-33 Start-up & Hold-on Voltage (L=33

µH)

Start up

Hold on

Output Current (mA)

Fig. 12 SS6639-50 Start-up & Hold-on Voltage (L=33uH)

100

120

140

160

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

Start up

Hold on

Output Current (mA)

100

120

140

160

0.0

0.2

0.4

0.6

0.8

1.0

1.2

Fig. 13 SS6639-33 Start-up & Hold-on Voltage (L=33

µH)

Start up

Hold on

Output Current (mA)

Fig. 14 SS6639-50 Start-up & Hold-on Voltage (L=33uH)

100

120

140

160

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

Start up

Hold on

Output Current (mA)

-40

-20

100

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Fig. 15 SS6639 Output Voltage vs. Temperature

VOUT = 3.3V

VOUT = 3.0V

VOUT = 2.7V

VOUT =5.0V

Output Current (mA)

-40

-20

100

105

110

115

120

125

130

135

Fig. 16 SS6639 Switching Frequency vs.Temperature

VOUT = 5.0V

VOUT = 3.3V

VOUT = 3.0V

VOUT = 2.7V

Rev.2.01 6/26/2003

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