TL499A

WIDE-RANGE POWER-SUPPLY CONTROLLERS

SLVS029F – JANUARY 1984 – REVISED MAY 2000

5

POST OFFICE BOX 655303

APPLICATION INFORMATION

TL499A

L = 50

µH

SERIES IN1

SW REG IN2

RCL = 500 Ω

OUTPUT

CF = 470 µF

RE1

RE2 = 4.7 kΩ

CP = 0.01 µF

SERIES IN1

SW REG IN2

REF

SW CURRENT

CTRL

OUTPUT

SW IN

GND (PWR)

GND

+

1

3

8

7

6

5

8

1

2

3

4

Figure 1. TL499A Basic Configuration

Table 1. Maximum Output Current vs Input and Output Voltages

OUTPUT

SWITCHING REGULATOR INPUT VOLTAGE (SW REG IN2)

(V)

OUTPUT

VOLTAGE

1.1

1.2

1.3

1.5

1.7

2

2.5

3

5

6

9

(V)

OUTPUT CURRENT

(mA)

30

65

90

25

50

80

100

20

20

25

30

80

100

100

15

15

20

30

45

55

100

100

100

12

10

15

20

25

30

40

55

70

100

100

100

10

15

20

25

30

35

45

65

80

100

100

9

20

25

25

35

40

50

70

90

100

100

6

30

35

40

45

55

75

95

100

5

35

40

45

55

70

85

100

100

Circuit of Figure 1, except:

4.5

35

45

50

60

75

95

100

100†

RCL = 150 Ω

3

55

65†

75†

95†

100†

CF = 330 µF

2.9

60†

70†

75†

100†

100†

CP = 0.1 µF

† The difference between the output and input voltage for these combinations is greater than the minimum

output-to-input differential-voltage specification at 70

°C (1.2 V), but less than the minimum at 85°C (1.9 V).