3-34

TELCOM SEMICONDUCTOR, INC.

TYPICAL PERFORMANCE CHARACTERISTICS OF INTERNAL DC-TO-DC CONVERTER

LOAD CURRENT (mA)

OUTPUT CURRENT (mA)

–5

–4

–3

–2

–1

0

1

2

3

4

5

0

1020

3040

50

60

70

0

6

8

10

4

214

16

18

12

20

80

Output Voltage vs Load Current

–0

–1

–3

–2

–4

–5

–7

–6

–8

Output Voltage vs. Output Current

OSCILLATOR CAPACITANCE (pF)

100

10

1

110

100

1000

Oscillator Frequency vs. Capacitance

LOAD CURRENT (mA)

0

3

456

12

7

8

9

10

0

25

50

75

100

125

150

175

200

Output Ripple vs. Load Current

TEMPERATURE (

°C)

70

80

90

100

60

50

40

–50

025

–25

50

75

100

Output Source Resistance vs. Temperature

V+ = 5V

V+ = 5V

Slope 60

Ω

Osc. Freq. = 100kHz

CAP = 1

µF

CAP = 10

µF

V+ = 5V

TEMPERATURE (

°C)

125

150

100

75

50

–50

025

–25

50

75

125

100

Oscillator Frequency vs. Temperature

V+ = 5V

PRECISION ANALOG FRONT ENDS

TC500

TC500A

TC510

TC514