LTC4358

5

4358fa

PIN FUNCTIONS

DRAIN: The exposed pad is the drain of the internal

N-channel MOSFET. This pin must be connected to OUT

(Pin 9/Pin 10).

GATE: Gate Drive Output. If reverse current flows, a fast

pulldown circuit quickly connects the GATE pin to the IN

pin, turning off the MOSFET. Leave open if unused.

GND: Device Ground.

IN: Input Voltage and Fast Pulldown Return. IN is the

anode of the ideal diode. The voltage sensed at this pin is

used to control the source-drain voltage drop across the

internal MOSFET. If reverse current starts to flow, a fast

pulldown circuit quickly turns off the internal MOSFET. The

fast pulldown current is returned through this pin.

NC: No Connection. Not internally connected.

OUT: Output Voltage. The OUT pin is the cathode of the ideal

diode and the common output when multiple LTC4358s

are configured as an ideal diode-OR. The voltage sensed

at this pin is used to control the source-drain voltage drop

across the MOSFET. Connect this pin to the drain of the

internal N-channel MOSFET (Pin 15/Pin 17).

through an RC hold-up circuit.

(DE/FE PACKAGES)

4358 BD

CHARGE PUMP

+

–

FPD

COMP

GATE

AMP

25mV

25mV

IN

OUT

DRAIN

GATE

GND

IN

+

–

BLOCK DIAGRAM