Overview
The LM5109ASDX/NOPB is a high-voltage gate driver designed and manufactured by Texas Instruments. This device is optimized to drive both the high-side and low-side N-Channel MOSFETs in synchronous buck or half bridge configurations. It is known for its cost-effectiveness, high voltage capability, and robust level shift technology. The LM5109A can operate with rail voltages up to 90V and features independent TTL compatible inputs, making it versatile for various power conversion applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Output Current | 1.0 A (Sink / 1.0 A Source) | A |
| Bootstrap Supply Voltage | Up to 108 V DC | V |
| Input Voltage Thresholds | 0.8 V to 2.2 V | V |
| Propagation Times | 30 ns Typical | ns |
| Rise and Fall Times | 15 ns | ns |
| Propagation Delay Matching | 2 ns Typical | ns |
| Supply Rail Under-Voltage Lockout | Yes | |
| Package Types | SOIC-8, WSON-8 | |
| Operating Temperature Range | -40°C to 125°C | °C |
Key Features
- Drives both high-side and low-side N-Channel MOSFETs in synchronous buck or half bridge configurations.
- 1A peak output current (1.0A sink / 1.0A source).
- Independent TTL compatible inputs.
- Bootstrap supply voltage up to 108V DC.
- Fast propagation times (30 ns typical) and excellent propagation delay matching (2 ns typical).
- Drives 1000 pF load with 15ns rise and fall times.
- Supply rail under-voltage lockout.
- Low power consumption.
- Pin compatible with ISL6700.
- Available in industry standard SOIC-8 and thermally enhanced WSON-8 packages.
Applications
- Current Fed Push-Pull Converters.
- Half and Full Bridge Power Converters.
- Solid State Motor Drives.
- Two Switch Forward Power Converters.
Q & A
- What is the peak output current of the LM5109A?
The LM5109A has a peak output current of 1.0 A (1.0 A sink / 1.0 A source).
- What is the maximum bootstrap supply voltage for the LM5109A?
The maximum bootstrap supply voltage for the LM5109A is up to 108 V DC.
- What are the input voltage thresholds for the LM5109A?
The input voltage thresholds for the LM5109A are between 0.8 V and 2.2 V.
- What are the typical propagation times for the LM5109A?
The typical propagation times for the LM5109A are 30 ns.
- What are the rise and fall times for the LM5109A when driving a 1000 pF load?
The rise and fall times for the LM5109A when driving a 1000 pF load are 15 ns each.
- Does the LM5109A have under-voltage lockout protection?
Yes, the LM5109A has under-voltage lockout protection on both the low-side and high-side power rails.
- In what packages is the LM5109A available?
The LM5109A is available in SOIC-8 and thermally enhanced WSON-8 packages.
- What is the operating temperature range for the LM5109A?
The operating temperature range for the LM5109A is -40°C to 125°C.
- Is the LM5109A pin compatible with any other devices?
Yes, the LM5109A is pin compatible with the ISL6700.
- What are some typical applications for the LM5109A?
The LM5109A is typically used in current fed push-pull converters, half and full bridge power converters, solid state motor drives, and two switch forward power converters.
