MAX1992ETG datasheet(8/36 Pages) MAXIM

Part #	MAX1992ETG

Description	Quick-PWM Step-Down Controllers

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Manufacturer	MAXIM [Maxim Integrated Products]

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Quick-PWM Step-Down Controllers with Inductor

Saturation Protection and Dynamic Output Voltages

8

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(MAX1992 Circuit of Figure 1, MAX1993 Circuit of Figure 9, VIN = 12V, VDD = VCC = 5V, SKIP = VCC, TON = open, TA = +25°C,

unless otherwise noted.)

1.8V OUTPUT VOLTAGE

vs. LOAD CURRENT

LOAD CURRENT (A)

4

3

2

1

1.81

1.82

1.83

1.84

1.85

1.80

05

SKIP = GND

SKIP = VCC

VIN = 7V

VIN = 20V

SWITCHING FREQUENCY

vs. LOAD CURRENT

LOAD CURRENT (A)

4

3

1

2

50

100

150

200

250

300

350

400

0

05

SKIP = GND

SKIP = VCC

SWITCHING FREQUENCY

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

24

20

16

12

8

4

240

280

320

360

400

200

028

NO LOAD

4A LOAD

SWITCHING FREQUENCY

vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

240

280

320

360

400

200

-40

85

4A LOAD

NO LOAD

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

24

20

16

12

8

4

4.3

4.6

4.9

5.2

5.5

4.0

028

MAXIMUM OUTPUT CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

-15

10

4.9

5.0

5.1

5.2

4.8

-40

85

NO-LOAD SUPPLY CURRENT

vs. INPUT VOLTAGE

(FORCED-PWM MODE)

INPUT VOLTAGE (V)

24

20

12

16

8

4

1

2

3

4

5

6

7

8

9

10

0

028

IBIAS

IIN

SKIP = VCC

NO-LOAD SUPPLY CURRENT

vs. INPUT VOLTAGE

(SKIP MODE)

INPUT VOLTAGE (V)

24

20

16

12

8

4

0.3

0.6

0.9

1.2

1.5

0

028

IIN

IBIAS

SKIP = AGND

REFERENCE LOAD REGULATION

IREF (

μA)

80

60

40

20

0

1.994

1.998

2.002

2.006

2.010

1.990

-20

100

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