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LM27222M
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Product Detailed Parameters
- Description：HALF BRIDGE BASED MOSFET DRIVER,
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Driven Configuration：Half-Bridge
- Channel Type：Synchronous
- Number of Drivers：2
- Gate Type：MOSFET (N-Channel)
- Voltage - Supply：4V ~ 6.85V
- Logic Voltage - VIL, VIH：-
- Current - Peak Output (Source, Sink)：3A, 4.5A
- Input Type：Non-Inverting
- Rise / Fall Time (Typ)：17ns, 12ns
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
- High Side Voltage - Max (Bootstrap)：33 V
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Overview
The LM27222M is a high-speed dual N-channel MOSFET driver designed for synchronous buck regulator applications. It features a non-inverting input type and supports a maximum high-side bootstrap voltage of 33 V. Typical rise and fall times are 17 ns and 12 ns, respectively, with a maximum propagation delay of 8 ns. The device operates within a temperature range of -40°C to 125°C (TJ) and has an operating supply current of 825 uA. Power dissipation is rated at 720 mW.
Feature Summary
- High-speed synchronous MOSFET driving capability
- Non-inverting input configuration
- Optimized for push-pull topologies in synchronous regulators
Applications
- Synchronous buck regulators
- Push-pull MOSFET configurations
- High-frequency power conversion circuits
Procurement Notes
Verify the manufacturer designation, as National Semiconductor assets were acquired by Texas Instruments. Confirm the specific suffix (e.g., M vs. NOPB) matches your bill of materials, as packaging and compliance details may vary between legacy NS and current TI production runs. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability.
Selection Notes
Select this driver when fast switching speeds are required for synchronous rectification. The 4.5A peak drive current supports moderate-sized MOSFETs. Consider the 33V bootstrap limit and SOIC package constraints. Verify thermal management requirements given the 720mW dissipation rating and ensure the control logic voltage levels match the non-inverting input specifications.
Part Context
This component belongs to the family of high-speed gate drivers intended for power management ICs. It serves as a critical interface between low-voltage control logic and high-current power switches. The design focuses on minimizing dead-time and improving efficiency in DC-DC converter architectures through rapid transition times.
Replacement Considerations
Check for LM27222M/NOPB as a direct equivalent from Texas Instruments. Verify pinout compatibility and electrical parameters before substitution. No other public substitute part numbers are confirmed.
