Datasheet LTC4360-1, LTC4360-2 (Analog Devices) - 5

LTC4360-1/LTC4360-2
PIN FUNCTIONS GATE:
Gate Drive for External N-Channel MOSFET. An 5.8V. After an overvoltage event, this pin must fall below internal charge pump provides a 10µA pull-up current VIN(OV) – ∆VOV to release the overvoltage lockout. During to charge the gate of the external N-channel MOSFET. An lockout, GATE is held low and the PWRGD pull-down additional ramp circuit limits the GATE ramp rate when releases. turning on to 3V/ms. For slower ramp rates, connect an
ON (LTC4360-1):
On Control Input. A logic low at ON external capacitor from GATE to GND. An internal clamp enables the LTC4360-1. A logic high at ON activates a limits GATE to 6V above the OUT pin voltage. An internal low current pull-down at the GATE pin and causes the GATE high comparator controls the PWRGD pin. LTC4360-1 to enter a low current sleep mode. An internal
GATEP (LTC4360-2):
Gate Drive for External P-Channel 5µA current pulls ON down to ground. Connect to ground MOSFET. GATEP connects to the gate of an optional exter- or leave open if unused. nal P-channel MOSFET to protect against negative volt-
OUT:
Output Voltage Sense Input for Gate Clamp. Connect ages at IN. This pin is internally clamped to 5.8V below to the source of the external N-channel MOSFET to sense VIN. An internal 2M resistor connects this pin to ground. the output voltage for GATE to OUT clamp. Connect to IN if not used.
PWRGD
: Power Good Status. Open-drain output with
GND:
Device Ground. internal 500k resistive pull-up to OUT. Pulls low 65ms
IN:
Supply Voltage Input. Connect this pin to the input after GATE ramps above VGATE(TH). power supply. This pin has an overvoltage threshold of
BLOCK DIAGRAM
GATEP IN (LTC4360-2) 200k 5.8V 1.8M CHARGE PUMP 10µA GATE GATE HIGH 5.8V COMPARATOR + OUT ON – V (LTC4360-1) GATE(TH) + OVERVOLTAGE 1V COMPARATOR – CONTROL + 5µA 5.8V 500k – 5.7V PWRGD GND 436012 BD Rev B For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts