Data Sheet

10

Rev. 1.1, 2011-07-08

IFX91041

Module Enable and Thermal Shutdown

6

Module Enable and Thermal Shutdown

6.1

Description

With the enable pin the device can be set in off-state reducing the current consumption to less than 2µA.

The enable function features an integrated pull down resistor which ensures that the IC is shut down and the power

switch is off in case the pin EN is left open.

The integrated thermal shutdown function turns the power switch off in case of overtemperature. The typ. junction

shutdown temperature is 175°C, with a min. of 160°C. After cooling down the IC will automatically restart

operation. The thermal shutdown is an integrated protection function designed to prevent IC destruction when

operating under fault conditions. It should not be used for normal operation.

6.2

Electrical Characteristics Module Enable, Bias and Thermal Shutdown

Electrical Characteristics: Enable, Bias and Thermal Shutdown

V

Pos.

Parameter

Symbol

Limit Values

Unit

Conditions

Min.

Typ.

Max.

6.2.1

Current Consumption,

shut down mode

I

q,OFF

–0.1

2

µA

V

T

6.2.2

Current Consumption,

active mode

I

q,ON

––7

mA

V

V

FB connected to

V

OUT

6.2.3

Current Consumption,

active mode

I

q,ON

––10

mA

V

V

FB connected to

V

OUT

1)

6.2.4

Enable high signal valid

V

EN,lo

3.0

–

–

V

–

6.2.5

Enable low signal valid

V

EN,hi

––0.8

V

–

6.2.6

Enable hysteresis

V

EN,HY

50

200

400

mV

1)

1) Specified by design. Not subject to production test.

6.2.7

Enable high input current

I

EN,hi

––30

µA

V

6.2.8

Enable low input current

I

EN,lo

–0.1

1

µA

V

6.2.9

Over temperature shutdown

T

j,sd

160

175

190

°C

1)

6.2.10

Over temperature shutdown

hysteresis

T

j,sd_hyst

–15

–

K

1)