MAX8520 データシートの表示（PDF） - Maxim Integrated

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MAX8520

Smallest TEC Power Drivers for Optical Modules

Maxim Integrated 

Smallest TEC Power Drivers for Optical

Modules

Typical Operating Characteristics (continued)

(VDD = 5V, circuit of Figure 1, TA = +25°C unless otherwise noted)

SWITCHING FREQUENCY CHANGE vs. VDD

1200

FREQ = 1MHz

1000

800

600

400

FREQ = 500kHz

200

0

3.0 3.5 4.0 4.5 5.0 5.5

VDD (V)

SWITCHING FREQUENCY vs. REXT

1100

1000

900

800

VDD = 5V

700

VDD = 3.3V

600

500

400

60

80 100 120 140 160

REXT (kΩ)

REFERENCE VOLTAGE CHANGE vs. VDD

0.6

0.4 REF SOURCING 150µA

0.2

0

-0.2

-0.4

-0.6

-0.8

-1.0

-1.2

-1.4

3.0 3.5 4.0 4.5 5.0 5.5

VDD (V)

REFERENCE VOLTAGE CHANGE

vs. TEMPERATURE

5

4 REF SOURCING 150µA

3

2

1

0

-1

-2

-3

-4

-5

-40 -20

0 +20 +40 +60 +80

TEMPERATURE (°C)

REFERENCE VOLTAGE CHANGE

vs. LOAD CURRENT

0

-2

-4

-6

-8

-10

-12

0

0.2 0.4 0.6 0.8 1.0

LOAD CURRENT (mA)

STARTUP AND SHUTDOWN WAVEFORMS

MAX8520/21 toc17

VSHDN

5V/div

0V

IDD

200mA/div

0mA

200µs/div

ITEC

500mA/div

0mA

CTLI STEP RESPONSE

MAX8520/21 toc18

VCTLI

1V/div

1.5V

VDD STEP RESPONSE

MAX8520/21 toc19

VDD

2V/div

0A

ITEC

1A/div

1ms

10ms/div

0V

1A

ITEC

10mA/div

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