Overview
The LM5109BSDX/NOPB is a high-voltage gate driver designed by Texas Instruments. This device is cost-effective and engineered to drive both the high-side and the low-side N-channel MOSFETs in synchronous buck or half-bridge configurations. The floating high-side driver can operate with rail voltages up to 90 V, making it suitable for a variety of high-voltage applications. The LM5109BSDX/NOPB features robust level shift technology that operates at high speed while consuming low power, ensuring clean level transitions from the control input logic to the high-side gate driver.
Key Specifications
| Specification | Value |
|---|---|
| Package | 8-Pin WSON (NGT) |
| Pins | 8 |
| Operating Temperature Range (°C) | -40 to 125 |
| Peak Output Current (A) | 1.0 (Sink and Source) |
| Bootstrap Supply Voltage (V DC) | Up to 108 |
| Propagation Times (ns) | 30 (Typical) |
| Rise and Fall Times (ns) | 15 |
| Propagation Delay Matching (ns) | 2 (Typical) |
| Undervoltage Lockout (V) | 8 |
Key Features
- Drives both high-side and low-side N-channel MOSFETs.
- 1-A peak output current (1.0-A sink and 1.0-A source).
- Inputs compatible with independent TTL and CMOS.
- Bootstrap supply voltage up to 108 V DC.
- Fast propagation times (30 ns typical).
- Drives 1000-pF load with 15-ns rise and fall times.
- Excellent propagation delay matching (2 ns typical).
- Supply rail undervoltage lockout.
- Low power consumption.
- Available in 8-pin SOIC and thermally-enhanced 8-pin WSON packages.
Applications
The LM5109BSDX/NOPB is suitable for various high-voltage applications, including synchronous buck converters, half-bridge configurations, and other power management systems that require high-speed and low-power gate driving. It is particularly useful in industrial, automotive, and consumer electronics where reliable and efficient power management is crucial.
Q & A
- What is the LM5109BSDX/NOPB used for? The LM5109BSDX/NOPB is a high-voltage gate driver used to drive both high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge configurations.
- What is the peak output current of the LM5109BSDX/NOPB? The peak output current is 1 A (1.0 A sink and 1.0 A source).
- What is the operating temperature range of the LM5109BSDX/NOPB? The operating temperature range is -40°C to 125°C.
- What types of input signals are compatible with the LM5109BSDX/NOPB? The inputs are compatible with independent TTL and CMOS signals.
- What is the maximum bootstrap supply voltage for the LM5109BSDX/NOPB? The maximum bootstrap supply voltage is up to 108 V DC.
- What are the typical propagation times for the LM5109BSDX/NOPB? The typical propagation times are 30 ns.
- Does the LM5109BSDX/NOPB have undervoltage protection? Yes, it has supply rail undervoltage lockout.
- In what packages is the LM5109BSDX/NOPB available? It is available in 8-pin SOIC and thermally-enhanced 8-pin WSON packages.
- What are the rise and fall times for driving a 1000-pF load? The rise and fall times are 15 ns each.
- What is the typical propagation delay matching for the LM5109BSDX/NOPB? The typical propagation delay matching is 2 ns.
