MAX668-MAX669 datasheet(6/18 Pages) MAXIM

Part #	MAX668-MAX669

Description	1.8V to 28V Input, PWM Step-Up Controllers in 關MAX

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Manufacturer	MAXIM [Maxim Integrated Products]

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1.8V to 28V Input, PWM Step-Up

Controllers in µMAX

6

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuits of Figures 2, 3, 4, and 5; TA = +25°C; unless otherwise noted.)

1.240

1.242

1.243

1.241

1.245

1.246

1.244

1.248

1.249

1.247

1.250

-40

-20

0

20

40

60

80

100

REFERENCE VOLTAGE vs.

TEMPERATURE

TEMPERATURE (

°C)

VCC = 5V

0

100

150

50

250

300

200

400

450

350

500

0

100

200

300

400

500

SWITCHING FREQUENCY vs. ROSC

ROSC (kΩ)

VCC = 5V

0

100

300

400

500

600

-40

0

-20

20

40

60

80

100

SWITCHING FREQUENCY vs.

TEMPERATURE

TEMPERATURE (

°C)

200

100k

Ω

165k

Ω

499k

Ω

VIN = 5V

100

1000

10,000

EXT RISE/FALL TIME vs.

CAPACITANCE

CAPACITANCE (pF)

60

0

10

20

30

40

50

tR, VCC = 3.3V

tF, VCC = 3.3V

tR, VCC = 5V

tF, VCC = 5V

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MAX668-MAX669 Datasheet(PDF) 6 Page - Maxim Integrated Products

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