SNVS477C February 2007 – January 2016 LM5109B
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
1 Features
- Drives Both a High-Side and Low-Side N-Channel MOSFET
- 1-A Peak Output Current (1.0-A Sink and 1.0-A Source)
- Inputs Compatible With Independent TTL and CMOS
- Bootstrap Supply Voltage to 108-V DC
- Fast Propagation Times (30 ns Typical)
- Drives 1000-pF Load With 15-ns Rise and Fall Times
- Excellent Propagation Delay Matching (2 ns Typical)
- Supply Rail Undervoltage Lockout
- Low Power Consumption
- 8-Pin SOIC and Thermally-Enhanced 8-Pin WSON Package
2 Applications
- Current-Fed, Push-Pull Converters
- Half- and Full-Bridge Power Converters
- Solid-State Motor Drives
- Two-Switch Forward Power Converters
3 Description
The LM5109B device is a cost-effective, high-voltage gate driver designed to drive both the high-side and the low-side N-channel MOSFETs in a synchronous buck or a half-bridge configuration. The floating
high-side driver is capable of working with rail voltages up to 90 V. The outputs are independently controlled with cost-effective TTL and
CMOS-compatible input thresholds. The robust level shift technology operates at high speed while consuming low power and providing clean level transitions from the control input logic to the high-side gate driver. Undervoltage lockout is provided on both the low-side and the high-side power rails. The device is available in the 8-pin SOIC and thermally-enhanced 8-pin WSON packages.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM5109B | SOIC (8) | 4.90 mm × 3.91 mm |
| WSON (8) | 4.00 mm × 4.00 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Application Diagram
