Texas Instruments LM5134BMF/NOPB

Overview

LM5134BMF/NOPB from Texas Instruments is a single-channel low-side gate driver IC with dual complementary outputs (OUT and PILOT), delivering 7.6-A peak sink / 4.5-A peak source on OUT and 820-mA peak sink / 660-mA peak source on PILOT, operating from a 4-V to 12.6-V supply across –40°C to 125°C. It supports TTL/CMOS logic inputs up to 14 V independent of VDD and enables high-speed switching of power MOSFETs in motor drives and PFC converters.

For engineers reviewing the LM5134BMF/NOPB datasheet, LM5134BMF/NOPB pinout, LM5134BMF/NOPB application, or LM5134BMF/NOPB equivalent, key selection criteria include verified dual-output timing coordination (tPD-ON = 4.2 ns, tPD-OFF = 6.4 ns at VDD = 10 V), confirmed thermal performance in SOT-23-6 package (RθJA = 105.9°C/W), and documented UVLO behavior (3.25–4.0 V threshold with 0.36-V hysteresis).

Technical Context

The LM5134BMF/NOPB implements a dual-output architecture where the main OUT pin drives high-current power FETs while the complementary PILOT output controls an external turnoff MOSFET placed near the main switch-reducing gate-loop inductance and suppressing false turnon during high-dV/dt transitions. Its internal UVLO circuit clamps OUT below 1 V when VDD falls below threshold, ensuring fail-safe low-state operation.

It features matched propagation delays between inverting (INB) and non-inverting (IN) inputs, TTL-compatible logic thresholds (VIH = 2.4 V, VIL = 0.8 V), and break-before-make timing (2.5 ns at VDD = 10 V) to prevent shoot-through in the external pilot path. The device operates without external level-shifting, accepting 3.3-V or 5-V controller signals directly.

Key Specifications

Pinout & Package

LM5134BMF/NOPB is packaged in a 6-pin SOT-23 (DBV) with body size 2.90 mm × 1.60 mm and exposed pad for thermal enhancement. Pin functions are validated per TI SNVS808C datasheet Rev C (Feb 2016).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side gate driver applications.

Compared with UCC27524ADRV and LM5112MYX/NOPB, LM5134BMF/NOPB uniquely provides a verified PILOT output with sub-7-ns inter-output timing coordination, enabling robust turnoff control in high-speed, high-reliability power stages where gate-loop inductance must be minimized without adding discrete components.

Availability

LM5134BMF/NOPB is available at Aetrix Electronics and suitable for motor drivers, solid-state power controllers, and power factor correction converters requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and automotive-grade production.

Supply support for LM5134BMF/NOPB 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

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability IC design.

The LM5134 series was developed specifically for high-efficiency, high-frequency power conversion systems requiring precise, low-inductance gate drive - targeting motor control, PFC, and isolated DC-DC applications where false turnon and EMI must be rigorously controlled.

FAQ

What is the logic configuration of LM5134BMF/NOPB?

The LM5134BMF/NOPB is the LM5134B variant, featuring TTL-compatible logic inputs with VIH = 2.4 V and VIL = 0.8 V, independent of VDD. It supports both inverting (via INB) and non-inverting (via IN) operation, and its truth table confirms that high IN + low INB yields high OUT + low PILOT. This dual-input flexibility allows seamless integration into existing control architectures without external logic inversion.

Does LM5134BMF/NOPB require external pull-up or pull-down resistors on IN/INB pins?

No, LM5134BMF/NOPB does not require external pull-up or pull-down resistors on IN or INB when unused - the datasheet explicitly states to tie IN to VDD and INB to VSS (or vice versa) to ensure defined logic states. Internal input hysteresis (0.68 V) and leakage current <10 µA over temperature eliminate floating-input risk, simplifying layout and reducing BOM count.

How does the PILOT output improve EMI performance in high-speed switching?

The PILOT output of LM5134BMF/NOPB improves EMI performance by enabling placement of a small, local turnoff MOSFET adjacent to the main power FET - shortening the gate discharge loop and reducing parasitic inductance. This minimizes high-frequency ringing (10–30 MHz) during turnoff, directly lowering radiated emissions. Verified timing (tPD-ON = 4.2 ns) ensures the PILOT turns on before OUT turns off, preventing shoot-through while maximizing dV/dt control.

Can LM5134BMF/NOPB drive GaN HEMTs with 5-V gate drive?

Yes, LM5134BMF/NOPB supports GaN HEMTs requiring 5-V gate drive: its VDD range (4 V to 12.6 V) includes 5 V, and its 4.5-A peak source current fully charges typical GaN gate capacitance (e.g., 1–3 nF) within nanoseconds. The 14-V input tolerance also accommodates 5-V logic controllers directly. However, users must verify gate voltage limits of the specific GaN device and use appropriate gate resistors to control dI/dt.

What thermal considerations apply to LM5134BMF/NOPB in continuous 7.6-A operation?

LM5134BMF/NOPB is rated for 7.6-A peak sink current, not continuous DC current. In practice, it handles repetitive 7.6-A pulses (e.g., 100-ns width, 10% duty cycle) with proper PCB thermal design: the SOT-23-6 exposed pad must be soldered to a ≥100-mm² copper pour connected to internal ground planes. At 25°C ambient, RθJA = 105.9°C/W limits continuous power dissipation to ~0.3 W - sufficient for typical gate-driving duty cycles but not for sustained DC loads.