January 2005

3

MIC2012/2072

MIC2012

Micrel

Pin Description

Pin Number

Pin Number

Pin Name

Pin Function

(MIC2012)

(MIC2012-1, -2)

1

1

FAULT1

Fault Status (Output): Internal pull-up or open-drain. Asserted LOW when

Channel is in a thermal shutdown state or overcurrent condition for more

than 5ms. MIC2072 latches this output in its asserted state upon an over-

current condition. Toggling EN1 or removing the load will reset the circuit

breaker latch and deassert FAULT1.

n/a

2

EN1

Enable (Input): Channel 1, active-high (–1) or active-low (–2). Toggling this

input also resets the latched output of the MIC2072.

2

3

S3#

Control (Input): When this input is HIGH, the MAIN inputs are connected to

OUT1 and OUT2 via 100mΩ MOSFET switches. When this input is LOW

the AUX inputs are connected to OUT1 and OUT2 via 500mΩ MOSFET

switches.

3

5

AUX

Auxiliary 5V Supply (Input): Also used as power supply for internal circuitry.

n/a

4, 6, 7

NC

No Connection: This pin may be connected to other pins without restriction.

4

8

GND

Ground

5

9, 10

OUT2

Channel 2 (Output): For MIC2012-1, -2 both pins must be externally con-

nected together.

6

11, 12

MAIN

5V Main Supply (Input): All MAIN inputs must be connected together exter-

nally.

7

13, 14

OUT1

Channel 1 (Output): For MIC2012-1, -2 both pins must be externally con-

nected together.

n/a

15

EN2

Enable (Input): Channel 2, active-high (–1) or active-low (–2). Toggling this

input also resets the latched output of the MIC2072.

8

16

FAULT2

Fault Status (Output): Internal pull-up or open-drain. Asserted LOW when

Channel 2 is in a thermal shutdown state or overcurrent condition for more

than 5ms. MIC2072 latches this output in its asserted state upon an over-

current condition. Toggling EN2 or removing the load will reset the circuit

breaker latch and deassert FAULT2.