Analog Devices Inc. LTC7061EMSE#TRPBF

Overview

LTC7061EMSE#TRPBF from Analog Devices is a 100V half-bridge gate driver IC for dual N-channel MOSFETs in high-noise industrial and automotive power converters. It features independent floating grounds (SW and BGRTN), 0.8Ω pull-down / 1.5Ω pull-up drivers, adjustable dead-time via external resistor, adaptive shoot-through protection, and operates with VCC = 5–14V and gate supplies up to 14V. Used in synchronous buck, LLC, and motor drive half-bridges.

For engineers reviewing the LTC7061EMSE#TRPBF datasheet, LTC7061EMSE#TRPBF pinout, LTC7061EMSE#TRPBF application, or LTC7061EMSE#TRPBF equivalent, key selection criteria include floating ground tolerance (±10V), programmable dead-time (31–250 ns), UVLO thresholds on all supplies (VCC: 4.3V/14.6V; BST-SW & BGVCC-BGRTN: 3.4V), thermal shutdown at ~180°C, and MSOP-12 thermally enhanced package with exposed SGND pad.

Technical Context

The LTC7061EMSE#TRPBF implements dual independent level-shifted drivers with symmetric architecture: TG swings between BST and SW; BG swings between BGVCC and BGRTN. Each channel uses fixed-threshold TTL/CMOS inputs (VIH = 1.75V, VIL = 0.5V) with internal 1 MΩ pull-downs and hysteresis to suppress noise-induced false triggering during high-dV/dt switching events.

Its adaptive shoot-through protection monitors gate-source voltage transitions to prevent simultaneous conduction, while the DT pin programs matched propagation delay (tPLH) between BG low → TG high and TG low → BG high - ranging from 31 ns (RDT = 0 Ω) to 250 ns (RDT open), enabling robust timing control in 100V half-bridge topologies without external logic.

Key Specifications

Pinout & Package

Package: 12-lead plastic MSOP (MSE) with exposed thermal pad (Pin 13 = SGND). Must be soldered to PCB ground plane for rated thermal performance (θ_JA = 40°C/W) and noise immunity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage half-bridge gate driver applications.

Compared with IRS21844SPbF and LM5109BMAX/NOPB, the LTC7061EMSE#TRPBF uniquely combines programmable dead-time, adaptive shoot-through, triple-supply UVLO, and ±10V floating ground tolerance - making it the only option qualified for AEC-Q100-compliant 48V automotive systems requiring robust noise immunity and precise timing control.

Availability

LTC7061EMSE#TRPBF is available at Aetrix Electronics and suitable for industrial motor drives, automotive DC-DC converters, and telecom power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for LTC7061EMSE#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 industrial, automotive, communications, and healthcare markets since 1965.

The LTC7061 belongs to Analog Devices' Power by Linear™ high-voltage gate driver family, designed specifically for noise-immune, high-reliability half-bridge control in 48V+ automotive and industrial power systems.

FAQ

What is the maximum allowable voltage difference between SW and SGND for the LTC7061EMSE#TRPBF?

The LTC7061EMSE#TRPBF supports a voltage difference of –10V to +100V between SW and SGND, as specified in Absolute Maximum Ratings. This ±10V negative tolerance enables reliable operation during fast transient events in high-noise environments such as automotive 48V systems, where ground bounce can exceed typical limits. The device maintains functional integrity within this range without latch-up or parameter shift.

How does the LTC7061EMSE#TRPBF implement adaptive shoot-through protection?

The LTC7061EMSE#TRPBF monitors actual gate-source voltage transitions of the external MOSFETs to dynamically prevent simultaneous conduction. Unlike fixed dead-time schemes, it delays turn-on of one MOSFET until the other's V_GS falls below its threshold - ensuring zero cross-conduction even with mismatched gate drive timing or Miller-induced false turn-on. This behavior is confirmed in the Operation section and Table 1 of the datasheet.

Can the LTC7061EMSE#TRPBF drive logic-level MOSFETs?

Yes, the LTC7061EMSE#TRPBF can drive logic-level MOSFETs using gate supply voltages as low as 4V (BST–SW or BGVCC–BGRTN), per Electrical Characteristics. However, its 0.8Ω pull-down and 1.5Ω pull-up resistances are optimized for higher-threshold devices (e.g., 4–5V V_GS(th)) at 10V supply. At 4V, pull-up current drops significantly - verify R_DS(on) and switching loss with your specific MOSFET's Q_G curve.

What is the purpose of the FLT pin on the LTC7061EMSE#TRPBF, and how should it be interfaced?

The FLT pin on the LTC7061EMSE#TRPBF is an open-drain fault indicator that pulls low during VCC UVLO/OVLO, BST–SW UVLO, BGVCC–BGRTN UVLO, or thermal shutdown. It requires an external pull-up resistor (e.g., 51 kΩ to VCC) and asserts within microseconds. After fault clearance, it releases after a built-in 100 µs delay - enabling clean system-level fault latching without additional debounce circuitry.

Is the LTC7061EMSE#TRPBF pin-compatible with other members of the LTC706x family?

No, the LTC7061EMSE#TRPBF is not pin-compatible with LTC7060, LTC7062, or LTC7063. While all share the same 12-lead MSOP package, pin functions differ significantly - e.g., LTC7060 uses three-state inputs and different DT implementation, while LTC7062 lacks shoot-through protection and has distinct UVLO thresholds. PCB layout must be verified against the LTC7061EMSE#TRPBF-specific pinout in the datasheet.