Overview
The LM5105SD/NOPB is a high-voltage gate driver designed by Texas Instruments to drive both high-side and low-side N-Channel MOSFETs in synchronous buck or half-bridge configurations. This device is particularly suited for applications requiring high-speed switching and low power consumption. The LM5105 features a floating high-side driver capable of operating with rail voltages up to 100 V and includes a single TTL-compatible input for control. It also incorporates a high-voltage diode for charging the high-side gate-drive bootstrap capacitor, ensuring robust level shift technology and clean output transitions. The device is packaged in a thermally enhanced 10-pin WSON package, measuring 4 mm × 4 mm, which aids in thermal dissipation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | WSON (DPR) | - |
| Pins | 10 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Peak Gate Drive Current | 1.8 A | A |
| Bootstrap Supply Voltage Range | Up to 118 V DC | V |
| Rise and Fall Time | 15 ns | ns |
| Turnoff Propagation Delays | 26 ns (Typical) | ns |
| Supply Rail Undervoltage Lockout | Yes | - |
| Low-Side and High-Side Gate Driver Outputs | Yes | - |
Key Features
- Drives both high-side and low-side N-Channel MOSFETs in a synchronous buck or half-bridge configuration.
- 1.8-A peak gate drive current.
- Bootstrap supply voltage range up to 118 V DC.
- Integrated bootstrap diode.
- Single TTL-compatible input.
- Programmable turn-on delays (dead time) using an external resistor.
- Enable input pin for driver disable or enable.
- Fast turnoff propagation delays (26 ns typical).
- Drives 1000 pF with 15-ns rise and fall time.
- Supply rail undervoltage lockout.
- Low power consumption.
- Thermally enhanced 10-pin WSON package (4 mm × 4 mm)).
Applications
- Solid-state motor drives.
- Half- and full-bridge power converters).
Q & A
- What is the primary function of the LM5105SD/NOPB?
The LM5105SD/NOPB is designed to drive both high-side and low-side N-Channel MOSFETs in synchronous buck or half-bridge configurations).
- What is the peak gate drive current of the LM5105SD/NOPB?
The peak gate drive current is 1.8 A).
- What is the maximum bootstrap supply voltage range for the LM5105SD/NOPB?
The bootstrap supply voltage range is up to 118 V DC).
- Does the LM5105SD/NOPB have integrated bootstrap diode?
Yes, it has an integrated bootstrap diode).
- What type of input does the LM5105SD/NOPB use for control?
The device uses a single TTL-compatible input).
- Can the dead time be programmed in the LM5105SD/NOPB?
Yes, the dead time can be programmed using an external resistor).
- What is the typical turnoff propagation delay of the LM5105SD/NOPB?
The typical turnoff propagation delay is 26 ns).
- Does the LM5105SD/NOPB have undervoltage lockout protection?
Yes, it has supply rail undervoltage lockout protection).
- What is the operating temperature range of the LM5105SD/NOPB?
The operating temperature range is -40°C to 125°C).
- In what package is the LM5105SD/NOPB available?
The device is available in a thermally enhanced 10-pin WSON package (4 mm × 4 mm)).
