Overview
The LM5109BMAX/NOPB is a high-voltage, 1-A peak half-bridge gate driver manufactured by Texas Instruments. This device is designed to drive both the high-side and the low-side N-channel MOSFETs in synchronous buck or half-bridge configurations. It features a floating high-side driver capable of operating with rail voltages up to 90 V and supports independent TTL and CMOS-compatible input thresholds. The LM5109B is known for its robust level shift technology, high speed, low power consumption, and excellent propagation delay matching.
Key Specifications
| Parameter | Value |
|---|---|
| Peak Output Current | 1 A (1.0 A Sink and 1.0 A Source) |
| Bootstrap Supply Voltage | Up to 108 V DC |
| Propagation Times | 30 ns Typical |
| Rise and Fall Times | 15 ns for 1000-pF Load |
| Propagation Delay Matching | 2 ns Typical |
| Undervoltage Lockout (UVLO) | 8 V |
| Operating Temperature Range | -40°C to 125°C |
| Package Types | 8-Pin SOIC and Thermally-Enhanced 8-Pin WSON |
Key Features
- Drives both high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge configurations.
- Independent TTL and CMOS-compatible input thresholds.
- Bootstrap supply voltage up to 108 V DC.
- Fast propagation times (30 ns typical) and excellent propagation delay matching (2 ns typical).
- Drives 1000-pF load with 15-ns rise and fall times.
- Supply rail undervoltage lockout on both high-side and low-side power rails.
- Low power consumption.
- Available in 8-pin SOIC and thermally-enhanced 8-pin WSON packages.
Applications
The LM5109BMAX/NOPB is suitable for various high-voltage applications, including synchronous buck converters, half-bridge configurations, and other power management systems. It is particularly useful in systems that require high-speed switching, low power consumption, and robust level shifting. This device can be used in industrial power supplies, motor control systems, and other high-performance electronic circuits.
Q & A
- What is the peak output current of the LM5109BMAX/NOPB?
The peak output current is 1 A (1.0 A Sink and 1.0 A Source). - What is the maximum bootstrap supply voltage for the LM5109BMAX/NOPB?
The maximum bootstrap supply voltage is up to 108 V DC. - What are the typical propagation times for the LM5109BMAX/NOPB?
The typical propagation times are 30 ns. - What is the rise and fall time for a 1000-pF load?
The rise and fall times are 15 ns for a 1000-pF load. - What is the propagation delay matching for the LM5109BMAX/NOPB?
The propagation delay matching is 2 ns typical. - What is the undervoltage lockout (UVLO) threshold for the LM5109BMAX/NOPB?
The UVLO threshold is 8 V. - What are the available package types for the LM5109BMAX/NOPB?
The device is available in 8-pin SOIC and thermally-enhanced 8-pin WSON packages. - What is the operating temperature range for the LM5109BMAX/NOPB?
The operating temperature range is -40°C to 125°C. - Is the LM5109BMAX/NOPB compatible with TTL and CMOS inputs?
Yes, it is compatible with independent TTL and CMOS inputs. - What kind of protection does the LM5109BMAX/NOPB offer?
The device offers supply rail undervoltage lockout on both high-side and low-side power rails and protection from shoot-through and overtemperature.
