MAX870D datasheet(3/8 Pages) MAXIM

Part #	MAX870D

Description	Switched-Capacitor Voltage Inverters

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Manufacturer	MAXIM [Maxim Integrated Products]

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Switched-Capacitor Voltage Inverters

_______________________________________________________________________________________

3

0

0.5

1.0

1.5

2.0

2.5

3.0

1.5

2.5

2.0

3.0

3.5

4.0

4.5

5.0

5.5

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

MAX870

MAX871

60

10

1.5

2.5

3.0

2.0

OUTPUT RESISTANCE

vs. SUPPLY VOLTAGE

50

SUPPLY VOLTAGE (V)

3.5

4.0

5.5

4.5

5.0

40

20

30

MAX870

MAX871

0

15

10

5

20

25

30

35

40

45

50

-40

10

-15

35

60

85

MAX870

OUTPUT RESISTANCE vs. TEMPERATURE

TEMPERATURE (°C)

VIN = 1.5V

VIN = 3.3V

VIN = 5.0V

45

0

0.5

3.0

2.5

MAX870

OUTPUT CURRENT vs. CAPACITANCE

35

40

CAPACITANCE (

µF)

1.0

1.5

2.0

3.5

30

25

20

10

5

15

VIN = 3.15V, VOUT = -2.5V

VIN = 1.9V, VOUT = -1.5V

VIN = 4.75V, VOUT = -4.0V

35

0

0.5

2.0

MAX871

OUTPUT CURRENT vs. CAPACITANCE

25

30

CAPACITANCE (

µF)

1.0

1.5

2.5

20

15

10

5

VIN = 3.15V, VOUT = -2.5V

VIN = 1.9V, VOUT = -1.5V

VIN = 4.75V, VOUT = -4.0V

450

0

0.5

2.0 2.5 3.0

4.0

3.5

4.5

MAX870

OUTPUT VOLTAGE RIPPLE

vs. CAPACITANCE

50

350

400

CAPACITANCE (

µF)

1.5

1.0

5.0

300

250

200

150

100

VIN = 4.75V, VOUT = -4.0V

VIN = 3.15V, VOUT = -2.5V

VIN = 1.9V, VOUT = -1.5V

0

20

10

40

30

60

50

70

-40

10

-15

35

60

85

MAX871

OUTPUT RESISTANCE vs. TEMPERATURE

TEMPERATURE (°C)

VIN = 1.5V

VIN = 3.3V

VIN = 5.0V

0

150

100

50

200

250

300

350

400

450

500

0

1.0

0.5

1.5

2.0

2.5

MAX871

OUTPUT VOLTAGE RIPPLE

vs. CAPACITANCE

CAPACITANCE (

µF)

VIN = 4.75V, VOUT = -4.0V

VIN = 3.15V, VOUT = -2.5V

VIN = 1.9V, VOUT = -1.5V

__________________________________________Typical Operating Characteristics

(Circuit of Figure 1, VIN = +5V, C1 = C2 = C3, TA = +25°C, unless otherwise noted.)

-5.0

-4.0

-4.5

-3.0

-3.5

-2.0

-2.5

-1.5

-0.5

-1.0

0

10

15

20

5

25

30

35

40

45

MAX870

OUTPUT VOLTAGE

vs. OUTPUT CURRENT

OUTPUT CURRENT (mA)

VIN = 2.0V

VIN = 3.3V

VIN = 5.0V

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