Data Sheet

6

Rev. 1.1, 2014-10-30

IFX54441EJV50

IFX54441LDV50

Pin Configuration

3.2

Pin Definitions and Functions

Pin

Symbol

Function

1 (DSO-8 EP)

1,2 (TSON-10)

OUT

Output. Supplies power to the load. For this pin a minimum output capacitor of

3.3 µF is required to prevent oscillations. Larger output capacitors may be

required for applications with large transient loads in order to limit peak voltage

transients or when the regulator is applied in conjunction with a bypass capacitor.

For more details please refer to the section “Application Information” on

Page 19.

2 (DSO-8 EP)

4 (TSON-10)

SENSE

Output Sense. The SENSE pin is the input to the error amplifier. This allows to

achieve an optimized regulation performance in case of small voltage drops

R

p

that occur between regulator and load. In applications where such drops are

relevant they can be eliminated by connecting the SENSE pin directly at the load.

In standard configurations the SENSE pin can be connected directly to the OUT

pin. For further details please refer to the section “Kelvin Sense Connection”

on Page 19.

3, 7 (DSO-8 EP)

3, 8 (TSON-10)

NC

No Connect. The NC Pins have no connection to any internal circuitry. Connect

either to GND or leave open.

4 (DSO-8)

5 (TSON-10)

BYP

Bypass. The BYP pin is used to bypass the reference of the IFX54441 V50 to

achieve low noise performance. The BYP-pin is clamped internally to ±0.6 V (i.e.

one

V

unconnected.

1) A maximum value of 10 nF can be used for reducing output voltage noise over the bandwidth from 10 Hz to 100 kHz.

5 (DSO-8 EP)

7 (TSON-10)

EN

Enable. With the EN pin the IFX54441 V50 can be put into a low power shutdown

state. The output will be off when the EN is pulled low. The EN pin can be driven

by 5V logic or open-collector logic with pull-up resistor. The pull-up resistor is

V

must not be left floating.

2) Normally several microamperes.

3) Typical value is 1 µA.

6 (DSO-8 EP)

6,(TSON-10)

GND

Ground.

8 (DSO-8 EP)

9, 10 (TSON-10)

IN

Input. Via the input pin IN the power is supplied to the device. A capacitor at the

input pin is required if the device is more than 6 inches away from the main input

is designed to withstand reverse voltages on the Input pin with respect to GND

and Output. In the case of reverse input (e.g. due to a wrongly attached battery)

the device will act as if there is a diode in series with its input. In this way there will

be no reverse current flowing into the regulator and no reverse voltage will appear

at the load. Hence, the device will protect both - the device itself and the load.

4) In general the output impedance of a battery rises with frequency, so it is advisable to include a bypass capacitor in battery-

powered circuits. Depending on actual conditions an input capacitor in the range of 1 to 10 µF is sufficient.

9 (DSO-8 EP)

11 (TSON-10)

Tab

Exposed Pad. To ensure proper thermal performance, solder Pin 11 (exposed

pad) of TSON-10 to the PCB ground and tie directly to Pin 6. In the case of DSO-

8 EP as well solder Pin 9 (exposed pad) to PCB ground and tie directly to Pin 6.