Texas Instruments LM5110-2MX/NOPB

Overview

LM5110-2MX/NOPB from Texas Instruments is a dual-channel inverting gate driver IC designed to independently drive two N-channel MOSFETs in high-frequency power stages. It delivers 3-A source / 5-A sink peak current per channel, supports negative V_GS bias down to V_EE = −4 V relative to IN_REF, and achieves 25-ns typical propagation delay with 14-ns rise/12-ns fall times into 2-nF load - enabling efficient synchronous rectification and SMPS topologies.

For engineers reviewing the LM5110-2MX/NOPB datasheet, LM5110-2MX/NOPB pinout, LM5110-2MX/NOPB application, or LM5110-2MX/NOPB equivalent, key selection criteria include confirmed dual inverting logic configuration, compound MOS/bipolar output stage for stable drive across temperature, dedicated IN_REF and VEE pins enabling split-supply operation, and SOIC-8 package compatibility with industry-standard gate drivers.

Technical Context

The LM5110-2MX/NOPB implements two identical, independently controlled inverting totem-pole output stages, each combining parallel MOS and bipolar transistors to maintain >5-A sink and 3-A source capability over −40°C to +125°C and 3.5–14-V V_CC–V_EE range. Its input stage uses TTL-compatible thresholds (V_IL = 0.8 V, V_IH = 2.2 V) referenced to IN_REF, while outputs swing rail-to-rail between V_CC and V_EE, where V_EE may be up to 4 V below IN_REF.

Functional modes include normal operation (enabled by V_CC–IN_REF ≥ 2.9 V and SHDN ≥ 1.5 V), UVLO shutdown (V_CC–IN_REF < 2.3 V), and low-power standby (SHDN < 1.5 V, I_CCSD ≤ 25 µA). Propagation delays (t_d1/t_d2) and edge speeds are tightly matched between channels (<5 ns skew), supporting parallel operation for doubled drive current without layout-induced shoot-through.

Key Specifications

Pinout & Package

LM5110-2MX/NOPB is housed in an SOIC-8 package (4.90 mm × 3.91 mm body size) with gull-wing leads and standard JEDEC MS-012AC footprint. The package supports surface-mount reflow and provides thermal resistance R_θJA = 114°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5110-2M/NOPB, the LM5110-2MX/NOPB offers identical performance in a production-optimized reel format, while UCC27524ADR trades negative drive capability for higher source current and lower propagation delay in single-supply systems.

Availability

LM5110-2MX/NOPB is available at Aetrix Electronics and suitable for synchronous rectifier gate drivers, switch-mode power supply gate drivers, and solenoid/motor drivers requiring stable component supply, long-term manufacturability, and TI-authorized traceability.

Supply support for LM5110-2MX/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 leader specializing in analog, embedded processing, and power management technologies, with over 90 years of innovation in high-reliability analog ICs.

The LM5110 product line delivers high-current, thermally robust gate drivers for demanding power conversion applications - specifically engineered for synchronous rectification, high-frequency SMPS, and industrial motor control where negative V_GS bias and tight channel matching are critical.

FAQ

What logic configuration does the LM5110-2MX/NOPB implement?

The LM5110-2MX/NOPB implements dual inverting logic: a high input on IN_A produces a low output on OUT_A, and a high input on IN_B produces a low output on OUT_B. This configuration is explicitly defined in TI's device options table and verified in the functional block diagram and truth table of the LM5110 datasheet. The "-2" suffix denotes this inverting behavior, distinguishing it from the -1 (dual noninverting) and -3 (mixed) variants. No external inversion is required when using LM5110-2MX/NOPB in synchronous rectifier or half-bridge topologies.

Can the LM5110-2MX/NOPB drive MOSFET gates with negative voltage?

Yes, the LM5110-2MX/NOPB supports negative gate drive via its separate IN_REF and VEE pins. When IN_REF is connected to controller ground and VEE is biased up to 4 V below IN_REF (e.g., −3 V), the outputs swing from VCC to VEE - enabling true negative V_GS turn-off. This capability is confirmed in the "Turn-off with Negative Bias" section (8.3.3), absolute maximum ratings (IN_REF to VEE ≤ 5 V), and recommended operating conditions (IN_REF to VEE = 0–4 V). It directly enhances reliability in noisy or high-temperature environments.

What is the maximum capacitive load the LM5110-2MX/NOPB can drive reliably?

The LM5110-2MX/NOPB is characterized for 2-nF loads in its switching specifications (tr = 14 ns, tf = 12 ns), but its 5-A sink/3-A source capability supports larger loads in practice. TI's typical characteristics show stable operation up to 2200 pF with minimal degradation in rise/fall time. For loads exceeding 5 nF, parallel operation of both channels is recommended - doubling effective drive strength while maintaining matched timing. Layout parasitics (trace inductance, ground bounce) become dominant above ~10 nF, so careful PCB design is essential for reliable switching.

Does the LM5110-2MX/NOPB require external pull-up or pull-down resistors on its inputs?

No, the LM5110-2MX/NOPB inputs (IN_A and IN_B) have no internal pull-up or pull-down resistors - unlike some noninverting variants which include 18-µA pull-downs. Therefore, unused inputs must be externally tied to either IN_REF (logic low) or VCC (logic high) to prevent floating states that cause spurious output switching. This requirement is explicitly stated in Section 8.3.1 and Layout Guideline #5 of the datasheet. Leaving IN_A or IN_B unconnected risks unintended MOSFET turn-on and potential shoot-through failure.

How does the shutdown pin (SHDN) function on the LM5110-2MX/NOPB?

The SHDN pin on the LM5110-2MX/NOPB is an active-low TTL-compatible input that disables both output channels when pulled below 1.5 V, reducing total supply current to ≤25 µA. It features an internal 18-µA pull-up to VCC, so tying SHDN to VCC enables normal operation. The shutdown threshold (V_SDR) and hysteresis (165 mV) are specified in Section 7.5. This function is validated for use in thermal overload, start-up sequencing, and fault protection - and is fully operational across the full −40°C to +125°C junction temperature range.