MIC2085(2004) Ver la hoja de datos (PDF) - Micrel

Número de pieza

componentes Descripción

Fabricante

MIC2085
(Rev.:2004)

Single Channel Hot Swap Controllers

Micrel 

MIC2085/2086

Pin Description (Cont.)

Pin Number

MIC2086

18

Pin Number

MIC2085

15

Pin Name

SENSE

19,20

16

VCC

Micrel

Pin Function

Circuit Breaker Sense Input: A resistor between this pin and VCC sets the

current limit threshold. Whenever the voltage across the sense resistor

exceeds the slow trip current limit threshold (VTRIPSLOW), the GATE voltage

is adjusted to ensure a constant load current. If VTRIPSLOW (48mV) is

exceeded for longer than time period tOCSLOW, then the circuit breaker is

tripped and the GATE pin is immediately pulled low. If the voltage across the

sense resistor exceeds the fast trip circuit breaker threshold, VTRIPFAST, at

any point due to fast, high amplitude power supply faults, then the GATE pin

is immediately brought low without delay. To disable the circuit breaker, the

SENSE and VCC pins can be tied together.

The default VTRIPFAST for either device is 95mV. Other fast trip thresholds

are available: 150mV, 200mV, or OFF(VTRIPFAST disabled). Please contact

factory for availability of other options.

Positive Supply Input: 2.3V to 16.5V. The GATE pin is held low by an

internal undervoltage lockout circuit until VCC exceeds a threshold of 2.18V.

If VCC exceeds 16.5V, an internal shunt regulator protects the chip from

VCC and SENSE pin voltages up to 33V.

M0235-121903

4

January 2004

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