January 2005

3

M9999-101104

MIC2010/2070

Micrel

Pin Description

Pin Number

Pin Name

Pin Function

1

FAULT1

Fault Status (Output): Channel 1, active-low; weak pull-up to AUX. FAULT1

is asserted LOW when channel 1 is in a thermal shutdown state or overcur-

rent condition for more than 5ms. MIC2070 latches this output in its asserted

state upon overcurrent condition. Toggling EN1 or removing the load will

reset the circuit breaker latch, and deassert FAULT1.

2

EN1

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

input also resets the latched output of the MIC2070.

3

S3#

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

OUT1 and OUT2 via 100mΩ, 500mA MOSFET switches. When this input is

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

MOSFET switches with a current-limit threshold specified by external

resistors, RSET1 and RSET2.

4

RSET1

Current-Limt Set Resistor (Input): Channel 1. A resistor connected to this

input sets the current-limit threshold in AUX mode (S3# asserted). The

current-limit threshold is determined by approximately 18/RSET1.

5

AUX

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

6NC

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

7

RSET2

Current-Limit Set Resistor (Input): Channel 2. A resistor connected to this

input sets the current-limit threshold in AUX mode (S3# asserted). The

current-limit threshold is determined by approximately 18/RSET2.

8

GND

Ground

9, 10

OUT2

Channel 2 (Output): Both pins must be connected together externally.

11, 12

MAIN

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

externally.

13, 14

OUT1

Channel 1 (Output): Both pins must be connected together externally.

15

EN2

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

input also resets the latched output for the MIC2070.

16

FAULT2

Fault Status (Output): Channel 2, active-low; weak pull-up to AUX. FAULT2

is asserted LOW when channel 2 is in a thermal shutdown state or overcur-

rent condition for more than 5ms. MIC2070 latches this output in it's asserted

state upon overcurrent condition. Toggling EN2 or removing load will reset

the circuit breaker latch, and deassert FAULT2.