Analog Devices Inc. LTC1693-1IS8#TRPBF

Overview

LTC1693-1IS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual noninverting N-channel MOSFET driver in an 8-lead SOIC package, delivering 1.5A peak output current per channel, 16ns rise/fall times at V_CC = 12V with 1nF load, and 1GΩ electrical isolation between drivers for high-side/low-side gate drive in isolated DC/DC converters.

For engineers reviewing the LTC1693-1IS8#TRPBF datasheet, LTC1693-1IS8#TRPBF pinout, LTC1693-1IS8#TRPBF application, or LTC1693-1IS8#TRPBF equivalent, this device is selected for high-speed, isolated dual-drive requirements in telecom power supplies, synchronous forward converters, and motor control where rail-to-rail CMOS-compatible inputs with V_CC-independent thresholds and undervoltage lockout are critical.

Technical Context

The LTC1693-1IS8#TRPBF integrates two fully independent, electrically isolated driver channels-each featuring a CMOS inverter output stage with 1.4A high-side and 1.7A low-side peak current capability. Its input stage uses a 4V internal regulator to maintain V_CC-independent VIH/VIL thresholds (2.6V/1.4V typ) with 1.2V hysteresis, enabling robust noise immunity in noisy switching environments.

Each channel operates across a 4.5V–13.2V V_CC range and includes undervoltage lockout (active below 4V) and thermal shutdown (trip at 145°C with 20°C hysteresis). The 1GΩ GND1–GND2 isolation resistance permits floating operation of one driver while the other references system ground-essential for high-side gate drive without external level shifters.

Key Specifications

Pinout & Package

Package: 8-lead plastic SOIC (narrow, 0.150"), JEDEC MS-012, θ_JA = 135°C/W, TJ_MAX = 150°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5113SDX/NOPB and UCC27524ADGNR, the LTC1693-1IS8#TRPBF uniquely provides galvanic isolation between drivers in a compact SO-8, enabling true high-side gate drive without auxiliary circuitry-critical for isolated topologies where ground separation is mandatory.

Availability

LTC1693-1IS8#TRPBF is available at Aetrix Electronics and suitable for telecom power supplies, isolated DC/DC converters, and motor control systems requiring stable component supply, long-term industrial lifecycle support, and guaranteed I-grade temperature performance.

Supply support for LTC1693-1IS8#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, documentation, and manufacturing continuity for the LTC portfolio.

The LTC1693 family was designed specifically for high-efficiency, high-speed gate driving in isolated power conversion architectures-emphasizing electrical isolation, low quiescent current, and rail-to-rail drive capability without external level shifters.

FAQ

What is the maximum allowable voltage difference between GND1 and GND2 on the LTC1693-1IS8#TRPBF?

The LTC1693-1IS8#TRPBF specifies a maximum GND1-to-GND2 voltage of ±100V under operating conditions. This rating enables safe use in high-side configurations where the source of the driven MOSFET swings significantly above system ground-such as in active clamp forward or phase-shifted full-bridge converters. Exceeding ±100V risks breakdown of the internal isolation barrier.

Does the LTC1693-1IS8#TRPBF support 3.3V logic inputs when V_CC is 12V?

Yes, the LTC1693-1IS8#TRPBF supports 3.3V logic inputs regardless of V_CC level due to its internally regulated 4V bias rail. Its VIH and VIL thresholds (2.6V and 1.4V typical) are V_CC-independent, and the input can tolerate voltages up to V_CC + 0.3V. This eliminates level-shifting circuitry when interfacing with 3.3V microcontrollers or PWM controllers.

Can both channels of the LTC1693-1IS8#TRPBF be powered from the same V_CC rail?

Yes, both V_CC1 and V_CC2 pins on the LTC1693-1IS8#TRPBF may be connected to a common 4.5V–13.2V supply. However, each channel requires its own dedicated 0.1µF ceramic + 4.7µF low-ESR bypass capacitor placed directly between its respective V_CC and GND pin to ensure stable high-speed switching and prevent crosstalk.

What protection features does the LTC1693-1IS8#TRPBF include?

The LTC1693-1IS8#TRPBF includes undervoltage lockout (UVLO) that disables outputs when V_CC falls below 4V, and thermal shutdown that activates at 145°C junction temperature with 20°C hysteresis. Both features force the outputs low and disable the input buffer-preventing partial turn-on of power MOSFETs during fault conditions and ensuring safe recovery after fault clearance.

Is the LTC1693-1IS8#TRPBF pin-compatible with other variants in the LTC1693 family?

Yes, the LTC1693-1IS8#TRPBF shares the same SO-8 pinout with the LTC1693-2IS8#TRPBF (noninverting/inverting dual), but differs functionally: LTC1693-1IS8#TRPBF has two noninverting outputs, while LTC1693-2IS8#TRPBF has one noninverting and one inverting output. Pin compatibility allows layout reuse, but firmware or gate logic must match the output polarity of the selected variant.