Texas Instruments TPS2815D

Overview

TPS2815D from Texas Instruments is a dual high-speed MOSFET driver with dual 2-input NAND logic gates, delivering 2-A peak output current per channel at VCC = 14 V, 25-ns max rise/fall times, and 40-ns max propagation delay into 1-nF load. It operates across 4 V to 14 V supply range and −40°C to 125°C ambient temperature, used in synchronous buck regulators and half-bridge gate drive circuits.

For engineers reviewing the TPS2815D datasheet, TPS2815D pinout, TPS2815D application, or TPS2815D equivalent, this page provides verified technical context, validated pin functions, confirmed NAND-gate logic behavior, real-world timing performance under capacitive loads, and direct alternatives for dual-channel high-speed gate driving in power conversion systems.

Technical Context

The TPS2815D implements two independent NAND-gated drivers - each with noninverting inputs (1IN1/1IN2 and 2IN1/2IN2) - producing active-low outputs (1OUT = NOT(1IN1 AND 1IN2), 2OUT = NOT(2IN1 AND 2IN2)). Its output stage combines bipolar and MOSFET transistors in parallel to achieve rail-to-rail swing (0 V to VCC) with 2-A sourcing/sinking capability.

Input thresholds are CMOS-compatible: positive-going threshold ≈ 2/3 VCC (e.g., 5.8 V typ at VCC = 10 V), negative-going ≈ 1/3 VCC (e.g., 3.3 V typ), with 1.2-V hysteresis enhancing noise immunity. Input capacitance is 5 pF, and supply current remains ≤5 µA when inputs are static high or low.

Key Specifications

Pinout & Package

TPS2815D is housed in an 8-pin SOIC (D) package with standard 1.27-mm pitch and exposed pad not present. Pin assignments are validated per TI SLVS132F datasheet Figure "TPS2815 . . . D, P, AND PW PACKAGES (TOP VIEW)" and Terminal Functions table.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2814D, TPS2815D provides native NAND logic for hardware fault interlocking, while UCC27524ADRV offers higher drive strength and faster edges but demands external logic - making TPS2815D optimal for cost-sensitive, logic-integrated gate drive in mid-frequency power converters.

Availability

TPS2815D is available at Aetrix Electronics and suitable for synchronous buck regulators, half-bridge motor drives, isolated flyback converters, and industrial PLC output modules requiring stable component supply and long-term production continuity.

Supply support for TPS2815D 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 decades of expertise in high-reliability power IC design.

The TPS28xx series was developed specifically for high-efficiency, high-frequency power conversion systems - emphasizing fast switching, shoot-through mitigation, and robust gate drive under wide temperature and capacitive load conditions.

FAQ

What logic function does the TPS2815D implement, and how does it differ from TPS2814D?

The TPS2815D implements dual 2-input NAND gates: 1OUT = NOT(1IN1 AND 1IN2), 2OUT = NOT(2IN1 AND 2IN2). In contrast, TPS2814D uses dual 2-input AND gates with one inverting input per channel. This means TPS2815D outputs go low when both inputs are high - ideal for hardware-level fault masking or active-low enable schemes. The TPS2815D logic is intrinsic to the silicon and requires no external components, unlike TPS2814D's AND+invert configuration.

Does the TPS2815D include an internal voltage regulator like the TPS2811–TPS2813 family?

No, the TPS2815D does not include an internal regulator. Unlike TPS2811/12/13, which feature REG_IN and REG_OUT pins for 14–40 V input regulation, the TPS2815D is designed for direct 4–14 V VCC operation only. Its pinout omits REG_IN and REG_OUT terminals entirely - confirmed by the "TPS2815 . . . D, P, AND PW PACKAGES" diagram and Terminal Functions table in SLVS132F. External regulation is required if input exceeds 14 V.

What is the maximum capacitive load the TPS2815D can drive while maintaining specified timing?

The TPS2815D's 25-ns max rise/fall time and 40-ns max propagation delay are specified with a 1-nF load at VCC = 14 V. At 10-nF load, rise/fall times increase significantly (e.g., ~60–80 ns), as shown in Figures 25–26 of SLVS132F. For reliable operation within datasheet timing specs, total gate + trace capacitance should remain ≤1 nF. Paralleling both outputs reduces effective load per channel and restores speed - validated in Figures 28–31.

Can the TPS2815D drive both high-side and low-side N-channel MOSFETs in a half-bridge without level-shifting circuitry?

No - the TPS2815D is a single-supply, ground-referenced driver. Its outputs swing from GND to VCC only. To drive a high-side N-MOSFET, the source is at switch-node potential (not ground), requiring gate voltage ≥ V_DS + V_GS(th). Therefore, a dedicated high-side driver or bootstrap/level-shift circuit is mandatory. TPS2815D is suitable for low-side drive or high-side P-MOSFETs with appropriate gate biasing.

What decoupling capacitance is required for stable operation of the TPS2815D?

A 0.1-µF ceramic capacitor is required between VCC and GND, placed as close as possible to the TPS2815D pins. This provides instantaneous current for fast edge transitions and suppresses supply rail disturbance caused by 2-A output current spikes. TI's SLVS132F Application Information explicitly states: "Placing a 0.1-µF ceramic capacitor between VCC and ground is recommended." Larger bulk capacitance (e.g., 4.7 µF) is unnecessary unless driving very large MOSFETs with high Q_g.