MAX1720EUT datasheet(3/8 Pages) MAXIM

Part #	MAX1720EUT

Description	SOT23, Switched-Capacitor Voltage Inverters with Shutdown

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Manufacturer	MAXIM [Maxim Integrated Products]

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SOT23, Switched-Capacitor

Voltage Inverters with Shutdown

_______________________________________________________________________________________

3

-5

-4

-3

-2

-1

0

020 25

10 15

530 35 404550

OUTPUT VOLTAGE

vs. OUTPUT CURRENT

OUTPUT CURRENT (mA)

VIN = +1.5V

VIN = +2V

VIN = +3.3V

VIN = +5V

0

20

10

40

30

60

50

70

90

80

100

010 1520

525 3035

45

40

50

MAX1720

EFFICIENCY vs. OUTPUT CURRENT

OUTPUT CURRENT (mA)

VIN = +1.5V

VIN = +3.3V

VIN = +2V

VIN = +5V

0

20

10

40

30

60

50

70

90

80

100

010 1520

525 3035

45

40

50

MAX1719/MAX1721

EFFICIENCY vs. OUTPUT CURRENT

OUTPUT CURRENT (mA)

VIN = +1.5V

VIN = +2V

VIN = +3.3V

VIN = +5V

Typical Operating Characteristics

(Circuit of Figure 1, VIN = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = C3, TA = +25°C, unless other-

wise noted.)

ELECTRICAL CHARACTERISTICS

(VIN = +5V, SHDN = GND (MAX1719), SHDN = IN (MAX1720/MAX1721), C1 = C2 = 10µF (MAX1720), C1 = C2 = 1µF

(MAX1719/MAX1721), circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)

VIN (MIN)

≤ VIN ≤ +2.5V

RL = 10k

Ω

+2.5V

≤ VIN ≤ +5.5V

VIN (MIN)

≤ VIN ≤ +2.5V

+2.5V

≤ VIN ≤ +5.5V

IOUT = 0

SHDN = IN (MAX1719), SHDN = GND

(MAX1720/MAX1721), OUT is internally

forced to GND in shutdown

MAX1720

IOUT = 10mA

CONDITIONS

0.2

V

0.6

VIL

SHDN/ SHDN Input Logic Low

VIN - 0.2

V

2.1

VIH

SHDN/ SHDN Input Logic High

Ω

12

RO, SHDN

OUT to GND Shutdown

Resistance

65

Ω

RO

Output Resistance (Note 1)

MAX1719/MAX1721

1.6

5.5

MAX1719/MAX1721

1.5

5.5

MAX1720

%

99

Voltage Conversion Efficiency

60

200

kHz

621

fOSC

Oscillator Frequency

µA

100

ICC

Quiescent Current (Note 3)

750

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

V

VIN

Supply Voltage Range

MAX1720

Note 1: Capacitor contribution (ESR component plus (1/fOSC) · C) is approximately 20% of output impedance.

Note 2: All specifications from -40°C to +85°C are guaranteed by design, not production tested.

Note 3: The MAX1719/MAX1720/MAX1721 may draw high supply current during startup, up to the minimum operating supply voltage.

To guarantee proper startup, the input supply must be capable of delivering 90mA more than the maximum load current.

Continuous, long-term

25

mARMS

IOUT

Output Current

MAX1719/MAX1721

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