MAX679EUA datasheet(3/6 Pages) MAXIM

Part #	MAX679EUA

Description	Regulated 3.3V Charge Pump

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Manufacturer	MAXIM [Maxim Integrated Products]

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Regulated 3.3V Charge Pump

_______________________________________________________________________________________

3

0

EFFICIENCY

vs. OUTPUT CURRENT

20

10

OUTPUT CURRENT (mA)

10

50

70

60

40

30

0.01

1

100

90

80

100

0.1

FSET = IN (1MHz)

VIN = 3.0V

VIN = 3.5V

VIN = 2.4V

VIN = 2.0V

VIN = 1.8V

0

0.01

EFFICIENCY

vs. OUTPUT CURRENT

20

10

30

OUTPUT CURRENT (mA)

10

60

50

80

70

40

0.1

100

90

100

1

VIN = 3.5V

VIN = 3.0V

VIN = 2.4V

VIN = 2.0V

VIN = 1.8V

FSET = GND (330kHz)

2.8

0

OUTPUT VOLTAGE

vs. OUTPUT CURRENT

3.0

2.9

OUTPUT CURRENT (mA)

3.3

3.4

3.1

3.2

20

30

10

60

70

80

3.5

3.6

40

50

FSET = GND (330kHz)

DASHED LINES INDICATE

OUTPUT OUT OF REGULATION

VIN = 3.5V

VIN = 3.0V

VIN = 2.4V

VIN = 2.0V

VIN = 1.8V

2.9

0

OUTPUT VOLTAGE

vs. OUTPUT CURRENT

3.0

OUTPUT CURRENT (mA)

80 90

3.2

3.1

20 30

10

60 70

100

3.3

3.4

40 50

FSET = IN (1MHz)

DASHED LINES INDICATE

OUTPUT OUT OF REGULATION

VIN = 3.5V

VIN = 3.0V

VIN = 2.4V

VIN = 2.0V

VIN = 1.8V

0.1

1.8

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

3.2 3.4

10

1

2.2

2.0

3.0

3.6

100

2.6

2.8

2.4

SHDN = IN

SHDN = GND

0

-40

SHUTDOWN SUPPLY CURRENT

vs. TEMPERATURE

100

TEMPERATURE (°C)

60

300

400

200

-15

35

85

500

600

10

VIN = 2.4V

__________________________________________Typical Operating Characteristics

(Typical Operating Circuit with: VIN = V SHDN = 2V, CIN = 4.7µF, C1 = 0.33µF, COUT = 10µF, tested in-circuit, TA = +25°C, unless

otherwise noted.)

300

-40

PUMP FREQUENCY

vs. TEMPERATURE

310

TEMPERATURE (°C)

60

330

340

320

-15

35

85

350

360

10

FSET = GND (330kHz)

VIN = 2.5V

900

-40

PUMP FREQUENCY

vs. TEMPERATURE

940

920

960

TEMPERATURE (°C)

60

1020

1000

1060

1040

980

-15

35

85

1080

1100

10

FSET = IN (1MHz)

VIN = 2.5V

OUTPUT RIPPLE (2mA LOAD)

VOUT

50mV/div

AC COUPLED

100

µs/div

FSET = GND (330kHz)

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