LTC4361-1/LTC4361-2 - Overvoltage/Overcurrent Protection Controller
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Overview

Features

Typical Application

LTC4361 Typical Application
LTC4361 Typical Application

Description

The LTC4361 overvoltage/overcurrent protection controller safeguards 2.5V to 5.5V systems from input supply overvoltage. It is designed for portable devices with multiple power supply options including wall adaptors, car battery adaptors and USB ports.

The LTC4361 controls an external N-channel MOSFET in series with the input power supply. During overvoltage transients, the LTC4361 turns off the MOSFET within 1μs, isolating downstream components from the input supply. Inductive cable transients are absorbed by the MOSFET and load capacitance. In most applications, the LTC4361 provides protection from transients up to 80V without requiring transient voltage suppressors or other external components.

The LTC4361 has a delayed start-up and adjustable dV/dt ramp-up for inrush current limiting. A PWRGD pin provides power good monitoring for VIN. The LTC4361 features a soft shutdown controlled by the ON pin and drives an optional external P-channel MOSFET for negative voltage protection. Following an overvoltage condition, the LTC4361 automatically restarts with a start-up delay. After an overcurrent fault, the LTC4361-1 remains off while the LTC4361-2 automatically restarts after a 130ms start-up delay.

Packaging

2x2 DFN-8,SOT-23,

LTC4361 Package Drawing
LTC4361 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
(1-99)		 Price
(1k)*
LTC4361CDC-1#PBF DFN 8 C $2.00
LTC4361CDC-1#TRMPBF DFN 8 C $2.00 $1.45
LTC4361CDC-1#TRPBF DFN 8 C $2.00 $1.40
LTC4361CDC-2#PBF DFN 8 C $2.00
LTC4361CDC-2#TRMPBF DFN 8 C $2.00 $1.45
LTC4361CDC-2#TRPBF DFN 8 C $2.00 $1.40
LTC4361CTS8-1#PBF SOT 8 C $2.00
LTC4361CTS8-1#TRMPBF SOT 8 C $2.00 $1.45
LTC4361CTS8-1#TRPBF SOT 8 C $2.00 $1.40
LTC4361CTS8-2#PBF SOT 8 C $2.00
LTC4361CTS8-2#TRMPBF SOT 8 C $2.00 $1.45
LTC4361CTS8-2#TRPBF SOT 8 C $2.00 $1.40
LTC4361HDC-1#PBF DFN 8 H $2.53
LTC4361HDC-1#TRMPBF DFN 8 H $2.53 $1.82
LTC4361HDC-1#TRPBF DFN 8 H $2.53 $1.77
LTC4361HDC-2#PBF DFN 8 H $2.53
LTC4361HDC-2#TRMPBF DFN 8 H $2.53 $1.82
LTC4361HDC-2#TRPBF DFN 8 H $2.53 $1.77
LTC4361HTS8-1#PBF SOT 8 H $2.53
LTC4361HTS8-1#TRMPBF SOT 8 H $2.53 $1.82
LTC4361HTS8-1#TRPBF SOT 8 H $2.53 $1.77
LTC4361HTS8-2#PBF SOT 8 H $2.53
LTC4361HTS8-2#TRMPBF SOT 8 H $2.53 $1.82
LTC4361HTS8-2#TRPBF SOT 8 H $2.53 $1.77
LTC4361IDC-1#PBF DFN 8 I $2.20
LTC4361IDC-1#TRMPBF DFN 8 I $2.20 $1.59
LTC4361IDC-1#TRPBF DFN 8 I $2.20 $1.54
LTC4361IDC-2#PBF DFN 8 I $2.20
LTC4361IDC-2#TRMPBF DFN 8 I $2.20 $1.59
LTC4361IDC-2#TRPBF DFN 8 I $2.20 $1.54
LTC4361ITS8-1#PBF SOT 8 I $2.20
LTC4361ITS8-1#TRMPBF SOT 8 I $2.20 $1.59
LTC4361ITS8-1#TRPBF SOT 8 I $2.20 $1.54
LTC4361ITS8-2#PBF SOT 8 I $2.20
LTC4361ITS8-2#TRMPBF SOT 8 I $2.20 $1.59
LTC4361ITS8-2#TRPBF SOT 8 I $2.20 $1.54
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.


Part Number Description Price Documentation
DC1506A LTC4361-1/LTC4361-2 Overvoltage/Overcurrent Protection Controller with Latchoff/Auto-Retry $50.00