Analog Devices Inc. LTC1696IS6#TRPBF

Overview

LTC1696IS6#TRPBF from Analog Devices (formerly Linear Technology) is a standalone overvoltage protection controller that monitors two independent DC output voltages (0.8V–24V range) and triggers fault response via an active-high open-drain output. It features ±2% overvoltage threshold accuracy, 2.7V–27V supply range, and programmable glitch filtering for robust transient immunity-used in telecom power supplies to safeguard sensitive downstream circuitry from rail collapse or regulator failure.

For engineers reviewing the LTC1696IS6#TRPBF datasheet, LTC1696IS6#TRPBF pinout, LTC1696IS6#TRPBF application, or LTC1696IS6#TRPBF equivalent, key selection criteria include dual-feedback voltage monitoring capability, SCR crowbar or back-to-back MOSFET gate drive support, reset/latch control via TIMER/RESET pin, and operation across –40°C to 125°C industrial temperature range.

Technical Context

The LTC1696IS6#TRPBF implements dual comparators referencing a precision 0.88V internal bandgap, each with 12mV hysteresis to prevent chatter during threshold crossing. Its OUT pin latches high on overvoltage detection and remains asserted until cleared by pulling TIMER/RESET low or dropping VCC below 1.94V UVLO.

Pin 6 serves three roles: external capacitor connection for glitch filter timing (t_D = C₁ × 1.185V / I_CHG, where I_CHG scales from 10µA to 18µA based on FB overdrive), asynchronous reset input, and external trigger input to force OUT high regardless of FB states.

Key Specifications

Pinout & Package

Package: 6-Lead Plastic TSOT-23 (ThinSOT™), 1mm profile, JEDEC MO-193 compliant. Pin 1 marked with dot; pin 1–6 arranged in standard SOT-23 top-view order.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G33DBVR and MAX6326UT29D3+, the LTC1696IS6#TRPBF uniquely delivers dual-rail monitoring, latch persistence, and direct high-current output drive-making it the only option among the three capable of autonomous, self-contained overvoltage shutdown without host processor involvement.

Availability

LTC1696IS6#TRPBF is available at Aetrix Electronics and suitable for telecommunication power systems, industrial control power rails, notebook computer adapter protection, and computer server VRM backup monitoring requiring stable component supply across extended temperature ranges.

Supply support for LTC1696IS6#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 acquired Linear Technology in 2017 and maintains its precision analog and power management product lines with full datasheet, reliability, and support continuity.

The LTC1696IS6#TRPBF belongs to Linear's overvoltage protection controller family, designed specifically for hardware-enforced, latch-based power rail supervision in mission-critical industrial and telecom infrastructure.

FAQ

What is the function of the TIMER/RESET pin on the LTC1696IS6#TRPBF?

The TIMER/RESET pin on the LTC1696IS6#TRPBF serves three distinct functions: (1) connection point for an external capacitor to program the glitch filter time delay, (2) asynchronous reset input-pulling it low clears the internal latch and returns OUT to low state, and (3) external trigger input-driving it high forces OUT active regardless of FB1/FB2 voltage levels. This multifunctionality enables flexible system-level control and diagnostic integration without additional logic components.

Can the LTC1696IS6#TRPBF monitor both positive and negative voltage rails?

No, the LTC1696IS6#TRPBF is designed exclusively for monitoring positive DC voltage rails. Its FB1 and FB2 inputs accept voltages from 0.8V to 17V referenced to GND, and the internal 0.88V reference is unidirectional. It cannot sense or protect negative supplies such as –5V or –12V without external level-shifting circuitry, which is not supported by the device architecture or datasheet guidance.

What is the maximum output current the LTC1696IS6#TRPBF can deliver at the OUT pin?

The LTC1696IS6#TRPBF delivers up to 80mA short-circuit current at the OUT pin when VCC = 12V, decreasing to 25mA at VCC = 5V and 10mA at VCC = 3.3V. This current is sufficient to directly trigger common SCRs like the 2N6507 or drive the gate of N-channel MOSFETs such as the 2N7002 without external buffering-enabling compact, low-component-count protection circuits.

How does the LTC1696IS6#TRPBF achieve ±2% overvoltage threshold accuracy?

The LTC1696IS6#TRPBF achieves ±2% overvoltage threshold accuracy through a trimmed 0.88V internal bandgap reference and matched comparator input stages. This tolerance holds across the full –40°C to +125°C operating temperature range and 2.7V–27V supply range, as verified in the Electrical Characteristics table. External resistor divider tolerances and temperature coefficients contribute additional error, but the IC itself guarantees the core reference precision.

Is the LTC1696IS6#TRPBF pin-compatible with other members of the LTC1696 family?

Yes, the LTC1696IS6#TRPBF shares identical pinout and footprint with all S6-package variants including LTC1696ES6#TRPBF and LTC1696HS6#TRPBF. Differences are limited to temperature grade (I-grade = –40°C to +125°C), internal trimming, and screening-no PCB layout changes are needed when substituting between these variants, provided thermal and reliability requirements are met.