MAX1968EUI datasheet(7/16 Pages) MAXIM

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VDD STEP RESPONSE

MAX1968 toc18

10ms/div

ITEC

20mA/div

VDD

2V/div

CTLI STEP RESPONSE

MAX1968 toc17

1ms/div

ITEC

2A/div

1.5V

VCTLI

1V/div

STARTUP AND SHUTDOWN WAVEFORMS

MAX1968 toc16

2ms/div

ITEC

500mA/div

VCTLI = 2V

IDD

200mA/div

VSHDN

5V/div

REFERENCE LOAD REGULATION

VDD = 5V

LOAD CURRENT (mA)

0.8

0.6

0.2

0.4

-0.2

-1.2

-1.0

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

-0.4

1.0

SINK

SOURCE

REFERENCE LOAD REGULATION

VDD = 3.3V

LOAD CURRENT (mA)

0.8

0.6

0.2

0.4

-0.2

-1.2

-1.0

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

-1.4

-0.4

1.0

SINK

SOURCE

REFERENCE VOLTAGE CHANGE

vs. TEMPERATURE

TEMPERATURE (

°C)

-20

-4

-2

-1

-5

-40

-3

060

REFERENCE VOLTAGE CHANGE

vs. VDD

VDD (V)

5.0

4.5

4.0

3.5

-3.0

-2.5

-1.5

-1.0

0.5

1.0

-3.5

3.0

5.5

-2.0

-0.5

SWITCHING FREQUENCY CHANGE

vs. VDD

VDD (V)

5.0

4.5

4.0

3.5

3.0

5.5

FREQ = 500kHz

SWITCHING FREQUENCY

vs. TEMPERATURE

TEMPERATURE (

°C)

-20

470

490

510

530

550

570

590

610

630

650

450

-40

FREQ = 500kHz

VCTLI = 1.5V

RTEC = 1

Ω

Power Drivers for Peltier TEC Modules

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VDD = 5V, VCTLI = 1V, VFREQ = GND, RLOAD = 1

Ω, circuit of Figure 1, TA = +25°C, unless otherwise noted.)

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