MAX864 datasheet(3/12 Pages) MAXIM

Teilenummer	MAX864

Bauteilbeschribung	Dual-Output Charge Pump with Shutdown

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Hersteller	MAXIM [Maxim Integrated Products]

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__________________________________________Typical Operating Characteristics

(VIN = 5.0V, capacitor values in Table 1, TA = +25°C, unless otherwise noted.)

10

-10

05

10

20

25

40

OUTPUT VOLTAGE

vs. OUTPUT CURRENT

-8

6

8

OUTPUT CURRENT (mA)

15

30

35

-2

4

2

0

-4

-6

V- LOADED

C1–C4 = 1

µF

VIN = 4.75V

FC1 = 1

FC0 = 1 (185kHz)

V- LOADED

V+ LOADED

BOTH V+ AND

V- LOADED EQUALLY

100

0

010

520

35

EFFICIENCY vs. OUTPUT CURRENT

@ 7kHz PUMP FREQUENCY

20

80

V+

V-

90

OUTPUT CURRENT (mA)

15

25

30

70

40

60

50

30

10

VIN = 5.0V

VIN = 3.3V

C1–C4 = 33

µF

FC1 = 0, FC0 = 0

V+

0

010

520

35

EFFICIENCY vs. OUTPUT CURRENT

@ 33kHz PUMP FREQUENCY

20

80

V+

V-

90

OUTPUT CURRENT (mA)

15

25

30

70

40

60

50

30

10

VIN = 5.0V

VIN = 3.3V

V+

C1–C4 = 6.8

µF

FC1 = 0, FC0 = 1

0

010

520

35

EFFICIENCY vs. OUTPUT CURRENT

@ 100kHz PUMP FREQUENCY

20

80

V+

V-

OUTPUT CURRENT (mA)

15

25

30

70

40

60

50

30

10

VIN = 5.0V

V+

VIN = 3.3V

C1–C4 = 2.2

µF

FC1 = 0, FC0 = 0

0

010

520

35

EFFICIENCY vs. OUTPUT CURRENT

@ 185kHz PUMP FREQUENCY

20

80

V+

V-

OUTPUT CURRENT (mA)

15

25

30

70

40

60

50

30

10

VIN = 5.0V

V+

VIN = 3.3V

C1–C4 = 1

µF

FC1 = 1, FC0 = 1

160

40

1.0

2.0

4.0

6.0

OUTPUT RESISTANCE

vs. SUPPLY VOLTAGE

60

140

SUPPLY VOLTAGE (V)

3.0

5.0

100

120

80

ROUT-

FC1 = 1, FC0 = 1

(185kHz @ 5V)

ROUT+

140

35

-55 -35 -15

45

65

125

OUTPUT RESISTANCE

vs. TEMPERATURE

50

125

TEMPERATURE (°C)

5

25

85 105

80

110

95

65

V-, VIN = 3.0V

V-, VIN = 4.5V

V+, VIN = 3.0V

V+, VIN = 4.5V

4.5

0

5

10 15

30

25

35

50

OUTPUT CURRENT vs. PUMP CAPACITANCE

(VIN = 1.9V, V+ + V- = 6V)

0.5

3.5

4.0

PUMP CAPACITANCE (

µF)

20

40 45

2.0

3.0

2.5

1.5

1.0

f = 7kHz

C1 = C2 = C3 = C4

f = 33kHz

f = 185kHz

f = 100kHz

9

0

5

10 15

30

25

35

50

OUTPUT CURRENT vs. PUMP CAPACITANCE

(VIN = 3.15V, V+ + V- = 10V)

1

7

8

PUMP CAPACITANCE (

µF)

20

40 45

4

6

5

3

2

C1 = C2 = C3 = C4

f = 185kHz

f = 7kHz

f = 33kHz

f = 100kHz

Dual-Output Charge Pump with Shutdown

_______________________________________________________________________________________

3

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