Typical Operating Characteristics (continued)

Ω, UVLO floating,

OUTPUT SHORT-CIRCUIT RESPONSE

MAX5923 toc23

200

µs/div

200mA/div

20V/div

+60V Simple Swapper Hot-Swap Switch

_______________________________________________________________________________________

7

OUTPUT SHORT-CIRCUIT RESPONSE

MAX5923 toc22

4

µs/div

10A/div

20V/div

PIN

NAME

FUNCTION

—

AGND

Analog Ground. This is the return of analog power input. AGND can vary ±4V from DGND. AGND and

DGND must be connected together at a single point in the system.

1, 2

DRAIN

and open-circuit detection threshold. These two pins must be connected together.

3IN

Input Voltage. Connect to a positive voltage source between 16V to 60V from IN to AGND. This is the

current-sense resistor positive terminal. Bypass to AGND with a 100µF, 100V electrolytic capacitor

and 0.1µF, 100V ceramic capacitor. Place the ceramic capacitor close to this pin.

4, 12, 18, 19

N.C.

No Connection. Not internally connected. Leave pins open. Pins are left unconnected to provide

additional spacing between the high-voltage pins and other pins.

5

AGND_S

Analog Ground Sense. Connect a 1

Ω resistor from AGND_S to AGND. This resistor protects the IC

during an output short-circuit condition.

6

UVLO

Undervoltage Lockout Adjustment Input. Referenced to AGND. Connect to the center point of a

resistive divider from IN to AGND to adjust the UVLO threshold. Leave open for default value.

7

FAULT

Fault Signal Open-Drain Logic Output. Reference to DGND. FAULT is latched low when:

•

An overtemperature condition occurs and/or,

•

8

POK

9

ZC

Zero-Current Fault Signal. Open-drain logic output. Reference to DGND. ZC is latched low when there

detection circuit is enabled immediately after the POK signal goes high.

10

TP1

Must be left open or connected to AGND

11

TP3

Must be left open or connected to AGND

Pin Description