Overview
The LM3017LE/NOPB, produced by Texas Instruments, is a high-efficiency low-side NFET controller designed for various power conversion applications. It features true shutdown, input side current limiting, and the ability to operate in boost, pass-through, or shutdown modes. This controller is particularly suited for implementations in Thunderbolt™ technology, as well as other consumer electronics and power supply systems. The device is available in a compact 10-pin WQFN package, measuring 2.4 mm × 2.7 mm × 0.8 mm, making it ideal for space-constrained designs.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 10-Pin WQFN |
| Body Size | 2.40 mm × 2.70 mm × 0.8 mm |
| Input Voltage Range | 5 V to 18 V |
| Shutdown Current | < 1 µA, 40 nA typical |
| EN/MODE Pin Voltage | ≤0.4 V (Shutdown), 1.6 V to 2.2 V (Boost), ≥2.6 V (Pass-through) |
| Thermal Shutdown | Yes |
| Cycle-by-Cycle Current Limit | Yes |
| Short-Circuit Protection | Yes |
| Output Overvoltage Protection | Yes |
| Soft Start | Yes |
Key Features
- True Shutdown: The LM3017 incorporates circuitry to disconnect the load from the input supply, protecting the system from output shorts using a high-side NMOS transistor.
- Input Side Current Limiting: Ensures control over inrush and short-circuit currents.
- Adjustable Output: Drives the Power Load Switch or MUX for the host Thunderbolt™ port.
- EN/MODE Pin: Controls the modes of operation (boost, pass-through, or shutdown) based on the input voltage.
- Thermal Shutdown, Cycle-by-Cycle Current Limit, Short-Circuit Protection, Output Overvoltage Protection, and Soft Start: Built-in protection features to ensure reliable operation.
Applications
- Thunderbolt™ Technology Host Ports: Ideal for boost conversions in Thunderbolt™ technology.
- Notebook and Desktop Computers, Tablets, and Other Portable Consumer Electronics: Suitable for power management in various consumer electronics.
- Hard Disc Drives, Solid-State Drives: Used in storage devices for efficient power management.
- Offline Power Supplies: Applicable in offline power supply designs.
- Set-Top Boxes: Used in set-top boxes for efficient power conversion.
Q & A
- What is the primary function of the LM3017LE/NOPB?
The LM3017LE/NOPB is a high-efficiency low-side NFET controller designed for boost, flyback, or SEPIC power conversion applications. - What are the different operation modes of the LM3017LE/NOPB?
The device operates in boost, pass-through, or shutdown modes controlled by the EN/MODE pin. - What is the input voltage range of the LM3017LE/NOPB?
The input voltage range is from 5 V to 18 V. - What is the typical shutdown current of the LM3017LE/NOPB?
The typical shutdown current is 40 nA. - What protection features are built into the LM3017LE/NOPB?
The device includes thermal shutdown, cycle-by-cycle current limit, short-circuit protection, output overvoltage protection, and soft start. - In what package is the LM3017LE/NOPB available?
The device is available in a 10-pin WQFN package. - What are some common applications of the LM3017LE/NOPB?
Common applications include Thunderbolt™ technology host ports, notebook and desktop computers, tablets, hard disc drives, solid-state drives, offline power supplies, and set-top boxes. - How does the EN/MODE pin control the operation of the LM3017LE/NOPB?
The EN/MODE pin controls the operation mode by setting the voltage to ≤0.4 V for shutdown, 1.6 V to 2.2 V for boost, and ≥2.6 V for pass-through. - What is the purpose of the true shutdown feature in the LM3017LE/NOPB?
The true shutdown feature disconnects the load from the input supply using a high-side NMOS transistor to protect against output shorts. - Is the LM3017LE/NOPB suitable for space-constrained designs?
Yes, it is suitable due to its compact 10-pin WQFN package measuring 2.4 mm × 2.7 mm × 0.8 mm.
