Overview
The LM5105SDX/NOPB is a high-voltage gate driver designed by Texas Instruments to drive both the high-side and low-side N–Channel MOSFETs in synchronous buck or half-bridge configurations. This device is particularly suited for applications requiring high voltage and high current drive capabilities. The floating high-side driver can operate with rail voltages up to 100 V, making it versatile for various power management systems. The LM5105 features a single TTL compatible input and an enable input pin, allowing for easy integration into existing designs. The device also includes robust level shift technology that operates at high speed while consuming low power, ensuring clean output transitions and efficient operation.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 10-Pin WSON (DPR) |
| Pins | 10 |
| Operating Temperature Range (°C) | -40 to 125 |
| Peak Gate Drive Current | 1.8 A |
| Bootstrap Supply Voltage Range | Up to 118 V DC |
| Supply Rail Undervoltage Lockout (UVLO) | 8 V |
| Turnoff Propagation Delays | 26 ns (Typical) |
| Rise and Fall Time | 15 ns |
| Load Capacitance | 1000 pF |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
Key Features
- Drives both high-side and low-side N-Channel MOSFETs
- 1.8-A peak gate drive current
- Bootstrap supply voltage range up to 118 V DC
- Integrated bootstrap diode
- Single TTL compatible input
- Programmable turnon delays (dead time)
- Enable input pin
- 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
The LM5105SDX/NOPB is suitable for a variety of high-voltage and high-current applications, including:
- Synchronous buck converters
- Half-bridge configurations
- Power management systems requiring high voltage and high current drive capabilities
- Industrial power supplies
- Automotive systems
- Renewable energy systems
Q & A
- What is the maximum operating voltage for the LM5105SDX/NOPB?
The LM5105SDX/NOPB can operate with rail voltages up to 100 V.
- What is the peak gate drive current of the LM5105SDX/NOPB?
The peak gate drive current is 1.8 A.
- What is the purpose of the integrated bootstrap diode in the LM5105SDX/NOPB?
The integrated bootstrap diode is used to charge the high-side gate-drive bootstrap capacitor.
- How is the dead time programmed in the LM5105SDX/NOPB?
The dead time is programmed using a single external resistor that controls the switching transition dead time through tightly matched turnon delay circuits.
- What is the typical turnoff propagation delay of the LM5105SDX/NOPB?
The typical turnoff propagation delay is 26 ns.
- What is the operating temperature range of the LM5105SDX/NOPB?
The operating temperature range is -40°C to 125°C.
- Is the LM5105SDX/NOPB RoHS compliant?
Yes, the LM5105SDX/NOPB is RoHS compliant.
- What is the package type of the LM5105SDX/NOPB?
The package type is a thermally enhanced 10-pin WSON (4 mm × 4 mm).
- What is the moisture sensitivity level (MSL) of the LM5105SDX/NOPB?
The MSL is 1 (Unlimited).
- Does the LM5105SDX/NOPB have undervoltage lockout protection?
Yes, the LM5105SDX/NOPB has supply rail undervoltage lockout protection.
