Rainbow-electronics MAX865 Manual do Utilizador descarregar pdf (Página 3)

MAX865

Compact, Dual-Output Charge Pump

_______________________________________________________________________________________

-10

0 2 6 14

OUTPUT VOLTAGE vs.

OUTPUT CURRENT

-4

-6

-8

MAX865-04

OUTPUT CURRENT (mA)

OUTPUT VOLTAGE, V+, V- (V)

4 8 10

-2

V-

C1 = C2 = C3 = C4 = 3.3µF

= 4.75V

V-

BOTH V+ AND

V- LOADED EQUALLY

V+

400

350

0 20 25 50

OUTPUT VOLTAGE RIPPLE

vs. PUMP CAPACITANCE

100

300

MAX865-05

PUMP CAPACITANCE (µF)

OUTPUT VOLTAGE RIPPLE (mVp-p)

5 10 15 30 35

200

150

250

40 45

C1 = C2 = C3 = C4

A: V+, IN = 4.75V, V+ +

V-

= 16V

B: V+, IN = 3.15V, V+ +

V-

= 10V

C: V+, IN = 1.90V, V+ +

V-

= 6V

D: V-, IN = 4.75V, V+ +

V-

= 16V

E: V-, IN = 3.15V, V+ +

V-

= 10V

F: V-, IN = 1.90V, V+ +

V-

= 6V

0 20 25 50

OUTPUT CURRENT

vs. PUMP CAPACITANCE

MAX865-06

PUMP CAPACITANCE (µF)

OUTPUT CURRENT, V+ TO V- (mA)

5 10 15 30 35

40 45

= 4.75V, V+ +

V-

= 16V

C1 = C2 = C3 = C4

= 3.15V, V+ +

V-

= 10V

= 1.90V, V+ +

V-

= 6V

1000

900

2.0 3.5 4.0 6.0

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

300

200

100

800

700

MAX865-07

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

2.5

3.0

4.5

400

600

500

5.0 5.5

C1 = C2 = C3 = C4 = 3.3µF

300

-55 5

125

OUTPUT RESISTANCE

vs. TEMPERATURE

100

250

MAX865-08

TEMPERATURE (°C)

OUTPUT RESISTANCE (Ω)

-35

-15

200

150

105

C1 = C2 = C3 = C4 = 3.3µF

V-, V

= 3.3V

V+, V

= 3.3V

V+, V

= 5.0V

V-, V

= 5.0V

-40 0 20 100

PUMP FREQUENCY

vs. TEMPERATURE

MAX865-09

TEMPERATURE (°C)

PUMP FREQUENCY (kHz)

-20 40

C1 = C2 = C3 = C4 = 3.3µF

= 5.0V

= 3.3V

= 2.0V

250

2.0 3.0 3.5 6.0

OUTPUT RESISTANCE

vs. SUPPLY VOLTAGE

200

MAX865-10

SUPPLY VOLTAGE (V)

OUTPUT RESISTANCE (Ω)

2.5 4.0 4.5

150

100

5.0 5.5

C1 = C2 = C3 = C4 = 3.3µF

V-

V+

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 1, V

= 5V, T

= +25°C, unless otherwise noted.)

1 2 3 4 5 6 7 8

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