Micrel, Inc.

MIC2790/1/3

August 23, 2013

3

Revision 1.0

Pin Description

Pin

Number

TSOT-23

(6L)

Pin

Number

1.6 × 1.6

(6L)

Pin

Number

2 × 2

(6L)

Pin

Number

2 × 2

(8L)

Pin

Name

Pin Function

1

6

6

7

/RESET

/RESET is an active-low output pin and is available in an open-

drain or push-pull configuration.

In the open-drain configuration, a pull-up resistor to VDD is

required and /RESET pin is asserted low when /MR is set to a

logic low or the SNS voltage decreases below the threshold

voltage. /RESET will remain low for the reset timeout delay after

The push-pull configuration does not require a pull-up resistor and

behaves exactly the same as the open-drain configuration.

1

6

6

8

RESET

Reset is an active-high push-pull output and is asserted high when

/MR is set to a logic low or the SNS voltage decreases below the

threshold voltage. RESET will remain high for the reset timeout

2

5

5

6

GND

Supply Ground.

3

4

4

5

/MR

Manual reset is an active-low input logic level pin and is internally

pulled to VDD through a 90k

Ω pull-up resistor. Pulling the /MR

input to a logic low asserts RESET and /RESET pins. /RESET will

remain low and RESET will remain high for the reset timeout delay

after /MR is pulled to logic high.

4

3

3

4

CTH

Programmable timeout delay. Connect a capacitor to ground to set

a user defined reset delay time.

5

2

2

3

SNS

Voltage monitor input. Connect sense pin to the voltage to be

monitored through a resistor divider. When this voltage decreases

below the threshold voltage, VTH, /RESET is asserted low and

RESET is asserted high.

6

1

1

2

VDD

Supply voltage pin. Bypass with a 1µF capacitor from this pin to

GND.

−

−

−

1

EN

Enable input function is only available in the MIC2793 version.

This pin enables the /MR input function and RESET and /RESET

outputs. When EN is in a logic low state, the reset outputs are de-

asserted. The EN pin has an internal 90k

Ω pull-up resistor to VDD.

−

EP

EP

EP

ePad

Exposed Pad. Connect to ground plane.