50mA, Frequency-Selectable,

Switched-Capacitor Voltage Converters

_______________________________________________________________________________________

5

90

70

80

0

0.33

MAX861

OUTPUT CURRENT vs. CAPACITANCE

HIGH-FREQUENCY MODE

CAPACITANCE (

µF)

4.7

40

20

1

2.2

22

60

10

10

30

50

FC = OUT

LV = GND

INVERTER MODE

80

70

0

0.33

MAX861

OUTPUT CURRENT vs. CAPACITANCE

MEDIUM-FREQUENCY MODE

CAPACITANCE (

µF)

4.7

40

20

1

2.2

22

60

10

10

30

50

FC = GND

LV = GND

INVERTER MODE

______________________________________________________________Pin Description

____________________________Typical Operating Characteristics (continued)

(All curves generated using the inverter circuit shown in the

INVERTER

DOUBLER

Doubled Positive Output

Flying-Capacitor Negative Terminal

Ground

Low-Voltage-Operation Input. Connect to OUT.

Active-Low Shutdown Input. Connect to GND pin if not

used. Connect to OUT to disable the charge pump.

Positive Input Supply

Flying-Capacitor Positive Terminal

Frequency Control, see Table 1

FUNCTION

Positive Input Supply

8

Flying-Capacitor Negative Terminal

C1-

4

Negative Output

OUT

5

Low-Voltage-Operation Input. Connect to GND.

LV

6

used. Connect to GND to disable the charge pump.

–

S

—

H

—

D

—

N

–

7

Ground

GND

3

Flying-Capacitor Positive Terminal

C1+

2

Frequency Control, see Table 1

FC

1

NAME

PIN