Rainbow-electronics MAX1804 Manual do Utilizador descarregar pdf (Página 3)

MAX1804

External Four-Input Feedback Integrator for

Power Supplies

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= 0°C to +85°C, V

+ = 3.3V, V

ADJ

= 1.2V, V

OUT

= 2V, C

+ = 0.1µF, C

COMP

= 470pF. Typical values are at T

= 25°C, unless oth-

erwise noted.)

PARAMETER CONDITIONS

MIN

TYP

MAX

U N IT S

SHDN INPUT

Logic Input Voltage High V

V+

= 2.7V to 5.5V 2.0 V

Logic Input Voltage Low V

V+

= 2.7V to 5.5V 0.6 V

Logic Input Current -1 1 µA

ELECTRICAL CHARACTERISTICS

= -40°C to +85°C, V

+ = 3.3V, V

ADJ

= 1.2V, V

OUT

= 2V, C

+ = 0.1µF, C

COMP

= 470pF.) (Note 1)

PARAMETER CONDITIONS

MIN TYP MAX

U N IT S

Supply Voltage Range (V+) 2.7 5.5 V

Shutdown Supply Current (V+) SHDN = GND 1 µA

Quiescent Supply Current (V+) SHDN = V+ 35 µA

UVLO Threshold, Rising 2.6 V

UVLO Threshold, Falling 2.3 V

INTEGRATOR INPUTS IN1–IN4

IN_ Voltage Range 0 5.5 V

IN_ Offset V

V+

= 2.7V to 5.5V -20 20

IN_ Scale Factor

ADJ

= 0.7V to 1.4V

3.98 4.02

V/V

IN_ Transconductance

IN_

= 4.75V to 4.85V, V

COMP

= 1.3V 12

µS

IN_ Bias Current

IN_

= 4.8V 2.7 µA

IN_ Shutdown Current

SHDN = GND 0.2 µA

IN_ Leakage Current

V+

= 0, V

SHDN

= 0 0.2 µA

IN_ Disable Threshold

ADJ

= 0.7V to 1.4V, V

ADJ

x 4, falling edge 87 93

ADJ INPUT

ADJ Voltage Range

0.7 1.4 V

ADJ Bias Current

-30 30 nA

ADJ Shutdown Current

SHDN = GND 0.2 µA

ADJ Leakage Current

V+

= 0, V

SHDN

= 0 0.2 µA

COMP OUTPUT

COMP Source Current

COMP

= 1.3V, V

IN_

= 4.6V 1.6 2.4 µA

COMP Sink Current

COMP

= 1.3V, V

IN_

= 5.0V 1.6 2.4 µA

COMP Output Voltage Low

Sink 1µA, V

IN_

= 5.0V 0.2 V

COMP Output Voltage High

Source 1µA, V

IN_

= 0.6V 2.4 V

OUT Output Voltage Low

OUT

= 10µA, V

IN_

= 4.6V 0.2 V

SHDN

= 0 0.1

V+

= 0 0.1

OUT Output Leakage Current

= 5.0V 0.1

µA

OUT Transconductance V

COMP

= 1V to 2V 3 23 µS

1 2 3 4 5 6 7 8 9 10 11

Power Supplies 1

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