Analog Devices Inc. LTC4364CS-1#TRPBF

Overview

LTC4364CS-1#TRPBF from Analog Devices is a surge stopper with ideal diode controller for automotive and industrial power rail protection. It regulates output voltage to 27V during 92V/1ms transients, provides adjustable overvoltage clamping (via FB divider), latches off on fault, and drives two external N-channel MOSFETs for surge suppression and reverse-input holdup. Used in 12V/24V vehicle electronics requiring AEC-Q100-compliant transient resilience.

For engineers reviewing the LTC4364CS-1#TRPBF datasheet, LTC4364CS-1#TRPBF pinout, LTC4364CS-1#TRPBF application, or LTC4364CS-1#TRPBF equivalent, key selection criteria include latch-off behavior (vs auto-retry), 4V–80V input range, 1.25V FB reference accuracy, 10μA shutdown current, and SO-16 package compatibility with high-voltage clearance requirements.

Technical Context

The LTC4364CS-1#TRPBF integrates dual gate drivers: HGATE controls an external N-MOSFET for overvoltage/current-regulated pass-through (with 0.25μs OV-to-turnoff propagation), while DGATE manages a second N-MOSFET as an ideal diode (30mV forward regulation, 0.35μs turn-off). Its fault timer uses TMR capacitor charging proportional to (VCC – VOUT), enabling SOA-aware timeout scaling.

It features independent UV (1.25V threshold, 50mV hysteresis) and OV comparators that disable auto-retry when active; the LTC4364-1 variant latches HGATE low after fault timeout and requires SHDN or UV reset. Reverse input protection extends to –40V, and reverse output protection to –20V, with integrated clamp diodes on HGATE/DGATE pins limiting gate-source voltage to 12V.

Key Specifications

Pinout & Package

Package: 16-Lead Plastic SO (Small Outline), 0°C to 70°C operating temperature range. Exposed pad not present (SO package).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar surge protection and ideal diode control applications.

Compared with LTC4364CS-2#TRPBF, the LTC4364CS-1#TRPBF provides deterministic fault isolation essential for ASIL-B systems, while TPS26631PWPR offers simpler integration at the expense of regulation fidelity and bidirectional protection.

Availability

LTC4364CS-1#TRPBF is available at Aetrix Electronics and suitable for automotive ECUs, industrial redundant power supplies, avionic hot-swap interfaces, and telecom backplane protection requiring stable component supply across extended lifecycle commitments.

Supply support for LTC4364CS-1#TRPBF 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, industrial automation, and automotive markets since 1965.

The LTC4364CS-1#TRPBF belongs to Analog Devices' Surge Stopper family, engineered specifically for robust front-end power protection in harsh environments-emphasizing latch-off reliability, wide input range, and integrated ideal diode control for automotive and avionics.

FAQ

What is the key functional difference between LTC4364CS-1#TRPBF and LTC4364CS-2#TRPBF?

The LTC4364CS-1#TRPBF latches off its HGATE output after fault timeout and requires manual reset via SHDN or UV pin, ensuring permanent isolation during persistent overvoltage. In contrast, the LTC4364CS-2#TRPBF automatically retries after a cool-down cycle. This makes the LTC4364CS-1#TRPBF appropriate for safety-critical automotive applications where uncontrolled re-engagement is prohibited.

Can LTC4364CS-1#TRPBF regulate output voltage to a value other than 27V?

Yes. The LTC4364CS-1#TRPBF regulates output voltage using an external resistor divider connected to the FB pin, referenced to an internal 1.25V precision bandgap. By selecting appropriate R1/R2 values, users can set any output clamp voltage - for example, 15V, 24V, or 36V - while maintaining ±2.4% accuracy over temperature and line conditions.

Does LTC4364CS-1#TRPBF support reverse polarity protection on both input and output sides?

The LTC4364CS-1#TRPBF provides reverse input protection down to –40V via internal clamps and reverse output protection down to –20V through coordinated DGATE/HGATE control. When input reverses, VCC drops below GND and both gate drivers pull low, turning off MOSFETs. During output reversal, DGATE rapidly shuts off the ideal diode MOSFET to block reverse current.

What is the minimum recommended TMR capacitor value for reliable fault timing in LTC4364CS-1#TRPBF?

Analog Devices specifies a minimum 6.8nF ceramic capacitor on the TMR pin for stable operation. In the typical application (Figure 1), a 6.8µF capacitor sets a ~50ms fault timeout at 92V input. Lower values reduce timeout linearly; however, values below 6.8nF risk noise susceptibility and inaccurate timing due to parasitic leakage and comparator input bias currents in the LTC4364CS-1#TRPBF.

Is LTC4364CS-1#TRPBF compatible with standard 16-pin SOIC footprints and assembly processes?

Yes. The LTC4364CS-1#TRPBF uses a standard 16-Lead Plastic SO package (SOIC-16) with 1.27mm pitch, fully compatible with industry-standard reflow profiles, wave soldering, and automated optical inspection. Its pinout matches the MSOP and DFN variants electrically, though mechanical layout must observe SOIC creepage requirements for 80V+ operation.