Overview
The LM5101BMAX/NOPB is a high-voltage gate driver from Texas Instruments, designed to drive both the high-side and low-side N-Channel MOSFETs in synchronous buck or half-bridge configurations. This device is part of the LM5101 series, which includes various versions with different current drive capabilities. The LM5101B specifically provides a 2-A gate drive and is available in several package options, including SOIC-8, WSON-8, and WSON-10.
The LM5101B features independent control of the high-side and low-side drivers, with TTL input thresholds. It is capable of operating with supply voltages up to 100 V and includes several protection features such as supply rail undervoltage lockout and excellent propagation delay matching.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VDD to VSS | -0.3 | 18 | V | |
| HS to VSS | -5 | 100 | V | |
| Junction Temperature | -40 | 125 | °C | |
| Peak Pullup Current (HO, LO = 0 V) | 2 | A | ||
| Peak Pulldown Current (HO, LO = 12 V) | 2 | A | ||
| LO Turnoff Propagation Delay | 22 | 56 | ns | |
| HO Turnoff Propagation Delay | 22 | 56 | ns | |
| Delay Matching: LO on and HO off | 4 | 10 | ns | |
| Output Rise Time (CL = 1000 pF) | 8 | ns | ||
| Output Fall Time (CL = 1000 pF) | 8 | ns |
Key Features
- Fast Propagation Times (25-ns Typical)
- Drives 1000-pF Load With 8-ns Rise and Fall Times
- Excellent Propagation Delay Matching (3-ns Typical)
- Supply Rail Undervoltage Lockout
- Low Power Consumption
- Pin Compatible With HIP2100/HIP2101
- TTL Input Thresholds for LM5101B
- High-Side Driver Capable of Operating With Supply Voltages Up to 100 V
Applications
- Current-Fed Push-Pull Converters
- Half and Full Bridge Power Converters
- Synchronous Buck Converters
- Two Switch Forward Power Converters
- Forward with Active Clamp Converters
Q & A
- What is the maximum junction temperature for the LM5101B?
The maximum junction temperature for the LM5101B is 125°C.
- What are the input thresholds for the LM5101B?
The LM5101B has TTL input thresholds.
- What is the peak pullup current for the LM5101B?
The peak pullup current for the LM5101B is 2 A.
- What is the propagation delay for the LM5101B?
The propagation delay for the LM5101B is typically 56 ns for both LO and HO turnoff.
- What are the package options available for the LM5101B?
The LM5101B is available in SOIC-8, WSON-8, and WSON-10 packages.
- What is the maximum supply voltage for the high-side driver?
The high-side driver can operate with supply voltages up to 100 V.
- Does the LM5101B have undervoltage protection?
- What is the typical output rise time for the LM5101B?
The typical output rise time for the LM5101B is 8 ns for a 1000-pF load.
- Is the LM5101B pin compatible with other devices?
- What are some common applications for the LM5101B?
