Analog Devices Inc. LTC4360CSC8-1#TRMPBF

Overview

LTC4360CSC8-1#TRMPBF from Analog Devices is an overvoltage protection controller designed to safeguard 2.5V–5.5V portable systems using external N-channel MOSFETs. It features a 5.8V ±2% overvoltage threshold, sub-1µs turn-off response, and integrated dV/dt-controlled gate ramp-up for inrush current limiting-enabling robust USB, wall adaptor, and car battery input protection in smartphones and MP3 players.

For engineers reviewing the LTC4360CSC8-1#TRMPBF datasheet, LTC4360CSC8-1#TRMPBF pinout, LTC4360CSC8-1#TRMPBF application, or LTC4360CSC8-1#TRMPBF equivalent, this device delivers precise 5.8V overvoltage detection, soft-start control via GATE pin ramping, low-current shutdown (1.5µA) when ON is high, and power-good monitoring via open-drain PWRGD with 65ms assertion delay.

Technical Context

The LTC4360CSC8-1#TRMPBF implements a fast analog overvoltage comparator with 25–300mV hysteresis and a charge-pump-based gate driver that delivers ≥4.5V gate overdrive above VOUT for logic-level N-MOSFETs. Its internal 130ms start-up delay prevents false triggering during input transients, while the GATE pin's 3V/ms controlled ramp limits inrush current into downstream capacitance.

It uses an active-low ON pin to enable/disable operation and enter 1.5µA sleep mode; during sleep, GATE is weakly pulled low (40µA), ensuring gentle MOSFET turn-off without voltage spikes. The PWRGD output asserts low only after GATE exceeds its 5.7–7.8V threshold for ≥65ms, providing reliable power sequencing feedback.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic SC70 (SC8), 0°C to 70°C operating temperature range, 2.2mm × 1.35mm footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar overvoltage protection applications.

Compared with LTC4360CSC8-2#TRMPBF, the LTC4360CSC8-1#TRMPBF omits GATEP and negative voltage protection but achieves 1.5µA shutdown current and tighter 5.8V threshold accuracy-making it optimal for space-constrained, single-polarity USB-powered devices. Versus LT4356-1IMS#PBF, it trades programmability for lower quiescent current and integrated inrush control, simplifying design for portable 5V systems.

Availability

LTC4360CSC8-1#TRMPBF is available at Aetrix Electronics and suitable for USB protection, smartphone charging circuits, and MP3/MP4 player power management requiring stable component supply across high-volume consumer electronics production.

Supply support for LTC4360CSC8-1#TRMPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.

The LTC4360 product line was developed specifically for overvoltage protection in portable electronics with multiple input sources, emphasizing fast response, minimal external components, and ultra-low quiescent current in miniature SC70 packages.

FAQ

What is the overvoltage threshold accuracy of the LTC4360CSC8-1#TRMPBF?

The LTC4360CSC8-1#TRMPBF features a 5.8V overvoltage threshold with ±2% accuracy over the full 0°C to 70°C operating temperature range. This corresponds to a guaranteed trip window of 5.684V to 5.916V, enabling reliable protection of 3.3V and 5V logic without nuisance shutdowns or unsafe delays. The threshold is internally trimmed and does not require external calibration.

How does the LTC4360CSC8-1#TRMPBF handle inrush current during power-up?

The LTC4360CSC8-1#TRMPBF controls inrush current by ramping the GATE pin voltage at 3V/ms, resulting in a predictable dV/dt-limited output voltage rise. For a 10µF output capacitor, this yields ~30mA inrush current. An external capacitor from GATE to GND allows further reduction-e.g., a 33nF capacitor lowers ramp rate to ~0.3V/ms, cutting inrush proportionally. No external compensation is needed in standard configurations.

Can the LTC4360CSC8-1#TRMPBF be used with P-channel MOSFETs?

No-the LTC4360CSC8-1#TRMPBF is designed exclusively to drive external N-channel MOSFETs via its GATE pin. It lacks the GATEP pin found on the LTC4360-2 variant, which is required to control P-channel devices for negative voltage protection. Attempting to drive a P-MOSFET with the LTC4360CSC8-1#TRMPBF will result in incorrect biasing and failure to achieve proper overvoltage isolation.

What is the function of the ON pin on the LTC4360CSC8-1#TRMPBF?

The ON pin on the LTC4360CSC8-1#TRMPBF is an active-low enable input with internal 5µA pull-down. When held low, the device operates normally; when driven high, it enters a 1.5µA sleep mode and gently turns off the external N-MOSFET using a 40µA weak pull-down on GATE. This feature enables system-controlled power gating without external FETs or complex sequencing logic.

Does the LTC4360CSC8-1#TRMPBF require external components for basic overvoltage protection?

No-basic overvoltage protection with the LTC4360CSC8-1#TRMPBF requires only an external N-channel MOSFET (e.g., Si1470DH) and output capacitor. The device integrates the overvoltage comparator, gate driver, charge pump, and PWRGD monitor, eliminating the need for TVS diodes, input capacitors, or voltage dividers in most applications. Layout best practices (short GND traces, wide power paths) are the only additional requirements.