Техническая Спецификация для Linear Technology DC1203A - LTC4357 Positive High Voltage Ideal Diode Controller DC1203A DC1203A

Модели

DC1203A

LTC4357

4357fd

pin Functions

Exposed Pad: Exposed pad may be left open or connected

to GND.
GATE: Gate Drive Output. The GATE pin pulls high, enhanc-

ing the N-channel MOSFET when the load current creates

more than 25mV of voltage drop across the MOSFET.

When the load current is small, the gate is actively driven

to maintain 25mV across the MOSFET. If reverse current

develops more than –25mV of voltage drop across the

MOSFET, a fast pull-down circuit quickly connects the

GATE pin to the IN pin, turning off the MOSFET.
GND: Device Ground.
IN: Input Voltage and GATE Fast Pull-Down Return. IN is

the anode of the ideal diode and connects to the source

of the N-channel MOSFET. The voltage sensed at this pin

is used to control the source-drain voltage across the

MOSFET. The GATE fast pull-down current is returned

through the IN pin. Connect this pin as close as possible

to the MOSFET source.
NC: No Connection. Not internally connected.
OUT: Drain Voltage Sense. OUT is the cathode of the ideal

diode and the common output when multiple LTC4357s

are configured as an ideal diode-OR. It connects to the

drain of the N-channel MOSFET. The voltage sensed at

this pin is used to control the source-drain voltage across

the MOSFET.
V

: Positive Supply Input. The LTC4357 is powered from

the V

pin. Connect this pin to OUT either directly or

through an RC hold-up circuit.

4357 BD

CHARGE PUMP

–

+ –

FPD

COMP

GATE

AMP

25mV

GATE

17V

OUT

GND

+–

block DiagraM