Data Sheet

LT4423

analog.com

Rev. 0

5 of 18

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

Figure 3. Pin Configurations

Table 3. Pin Descriptions

PIN

NAME

DESCRIPTION

1, 2, 3, 11 IN

Positive Input Supply and Ideal Diode Anode. Connect the IN pin to the power source

that supplies power to the load. The exposed pad is also connected to IN. Use a copper

plane connected to the exposed pad for thermal management (see Applications

Information – Layout and Thermal Considerations for sizing details). Bypass IN with a

0.1µF or larger capacitor to suppress undesired reverse turn-off in applications with

load transient ringing.

4

SHDN

Shutdown Control Input. Driving SHDN low disables the ideal diode and load switch

between IN and OUT, placing the part in a low quiescent current mode. SHDN may be

connected to IN for automatic turn-on applications. Do not leave SHDN open.

5, 6

GND

Device Ground.

7

STATUS

Open-Drain Status Output. When IN or OUT is greater than 1.9V, STATUS pulls low

when 1) SHDN is pulled low, 2) when OUT exceeds IN by approximately 20mV, or 3)

when thermal protection circuitry is active. Connect STATUS to a pull-up resistor

connected to OUT or an external supply. Leave STATUS open or connect to GND if not

used.

8, 9, 10

OUT

Ideal Diode Cathode Output. In diode-OR applications using multiple LT4423s, connect

the common output node to OUT. Bypass OUT with a 0.1µF or larger capacitor to

suppress undesired reverse turn-off in applications with load transient ringing.