Analog Devices Inc. LTC1693-2IS8#TRPBF

Overview

LTC1693-2IS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual high-speed N-channel MOSFET driver in an 8-lead SOIC package, featuring one noninverting and one inverting output channel with 1 GΩ electrical isolation between grounds. It delivers 1.5 A peak output current, achieves 16 ns rise/fall times at V_CC = 12 V into 1 nF, operates across 4.5 V to 13.2 V supply range, and includes undervoltage lockout and thermal shutdown - used for isolated high/low-side gate drive in synchronous forward converters and telecom power supplies.

For engineers reviewing the LTC1693-2IS8#TRPBF datasheet, LTC1693-2IS8#TRPBF pinout, LTC1693-2IS8#TRPBF application, or LTC1693-2IS8#TRPBF equivalent, this page provides verified technical context, real-world timing performance under load, isolation capability between drivers, CMOS-compatible input thresholds independent of V_CC, and design-meaningful specifications for gate-drive optimization in isolated DC/DC topologies.

Technical Context

The LTC1693-2IS8#TRPBF integrates two electrically isolated drivers: OUT1 is noninverting relative to IN1, while OUT2 is inverting relative to IN2 - enabling complementary high-side/low-side switching without external logic inversion. Its input stage uses an internal 4 V regulator to maintain V_IH = 2.6 V and V_IL = 1.4 V thresholds with 1.2 V hysteresis, ensuring noise immunity across temperature and supply variation.

The output stage employs adaptive predriver circuitry with 6 ns nonoverlapping dead time to minimize cross-conduction, delivering 1.4 A high-side and 1.7 A low-side peak currents. Isolation resistance between GND1 and GND2 exceeds 0.075 GΩ at 75 V bias, supporting floating high-side operation in forward and active-clamp topologies.

Key Specifications

Pinout & Package

Package: 8-lead plastic SOIC (narrow, 0.150-inch width), JEDEC MS-012, θ_JA = 135°C/W, rated for –40°C to +85°C industrial temperature range.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-speed MOSFET driver applications.

Compared with LM5112MMX/NOPB and UCC27524ADRV, the LTC1693-2IS8#TRPBF uniquely provides integrated dual-channel isolation and mixed-phase outputs in SO-8 - eliminating external logic and isolation components required by alternatives, thereby reducing PCB area and improving reliability in isolated DC/DC converters.

Availability

LTC1693-2IS8#TRPBF is available at Aetrix Electronics and suitable for high-reliability telecom power supplies, isolated forward converters, negative-to-positive boost regulators, and charge-pump inverters requiring stable component supply and long-term industrial-grade availability.

Supply support for LTC1693-2IS8#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 full product support, datasheets, and application engineering resources for the LTC portfolio.

The LTC1693 family was designed specifically for high-efficiency, isolated gate drive in telecom and industrial DC/DC converters - emphasizing low quiescent current, robust noise immunity, and integrated protection features.

FAQ

What is the maximum allowable voltage difference between GND1 and GND2 on the LTC1693-2IS8#TRPBF?

The LTC1693-2IS8#TRPBF specifies a GND1–GND2 isolation resistance ≥0.075 GΩ at 75 V bias, and its Absolute Maximum Ratings list ±100 V for GND1 to GND2. This allows safe operation with up to 100 V differential potential - sufficient for most isolated forward and active-clamp topologies. Exceeding ±100 V risks permanent damage to internal isolation barriers.

Does the LTC1693-2IS8#TRPBF support 3.3 V logic inputs while operating from a 12 V V_CC?

Yes. The LTC1693-2IS8#TRPBF features V_CC-independent CMOS-compatible inputs with VIH = 2.6 V (min) and VIL = 1.4 V (max), and 1.2 V typical hysteresis. A 3.3 V logic signal meets these thresholds reliably across temperature and supply variation - no level shifter is needed, even when V_CC = 12 V.

How does the LTC1693-2IS8#TRPBF achieve 16 ns rise/fall times with only 1.5 A peak current?

The LTC1693-2IS8#TRPBF achieves 16 ns rise/fall times at V_CC = 12 V into 1 nF by combining low-output-impedance drivers (RONH ≈ 3.0 Ω, RONL ≈ 2.85 Ω) with adaptive predriver circuitry that minimizes cross-conduction delay. Its 1.5 A peak current is optimized for typical MOSFET gate charges (Q_G < 20 nC), enabling fast transitions without excessive power dissipation or ringing.

Can the LTC1693-2IS8#TRPBF be used in a bootstrapped high-side configuration?

No - the LTC1693-2IS8#TRPBF is designed for fully isolated high-side drive using separate GND1 and V_CC1 connections. Its architecture does not support bootstrap capacitor operation. For bootstrapped applications, consider the LTC1693-3 or alternatives like the IR2110, which integrate dedicated high-side floating supply circuitry.

What is the purpose of the 1.2 V input hysteresis in the LTC1693-2IS8#TRPBF?

The 1.2 V hysteresis between VIH and VIL in the LTC1693-2IS8#TRPBF prevents false triggering caused by ground bounce, EMI, or supply noise during high-dI/dt switching events. This ensures reliable input recognition in noisy environments such as telecom PSUs and motor drives - a key differentiator versus drivers with fixed or no hysteresis.