LTC4213 datasheet(7/20 Pages) LINER

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LTC4213

4213f

PI FU CTIO S

READY (Pin 1): READY Status Output. Open drain output

that goes high impedance when the external MOSFET is on

and the circuit breaker is armed. Otherwise this pin pulls

low.

ON (Pin 2): ON Control Input. The LTC4213 is in reset

mode when the ON pin is below 0.4V. When the ON pin

increases above 0.8V, the device starts up and the GATE

pulls up with a 100µA current source. When the ON pin

drops below 0.76V, the GATE pulls down. To reset a circuit

breaker fault, the ON pin must go below 0.4V.

ISEL (Pin 3): Threshold Select Input. With the ISEL pin

grounded, float or tied to VCC the VCB is set to 25mV, 50mV

or 100mV, respectively. The corresponding VCB(FAST)

values are 100mV, 175mV and 325mV.

GND (Pin 4): Device Ground.

GATE (Pin 5): GATE Drive Output. An internal charge

pump supplies 100µA pull-up current to the gate of the

external N-channel MOSFET. Internal circuitry limits the

voltage between the GATE and SENSEN pins to a safe gate

drive voltage of less than 8V. When the circuit breaker

trips, the GATE pin abruptly pulls to GND.

SENSEN (Pin 6): Circuit Breaker Negative Sense Input.

Connect this pin to the source of the external MOSFET.

During reset or fault mode, the SENSEN pin discharges the

output to ground with 280µA.

SENSEP (Pin 7): Circuit Breaker Positive Sense Input.

Connect this pin to the drain of external N-channel MOSFET.

The circuit breaker trips when the voltage across SENSEP

and SENSEN exceeds VCB. The input common mode range

of the circuit breaker is from ground to VCC + 0.2V when

VCC < 2.5V. For VCC ≥ 2.5V, the input common mode range

is from ground to VCC + 0.4V.

VCC (Pin 8): Bias Supply Voltage Input. Normal operation

is between 2.3V and 6V. An internal under-voltage lockout

circuit disables the device when VCC < 2.07V.

Exposed Pad (Pin 9): Exposed pad may be left open or

connected to device ground.

LTC4213 Datasheet(PDF) 7 Page - Linear Technology