LM5109

LM5109 100V / 1A Peak Half Bridge Gate Driver April 2005 LM5109 100V / 1A Peak Half Bridge Gate Driver General Description The LM5109 is a low cost 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 100V. The outputs are independently controlled with TTL compatible input thresholds. A robust level shifter 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 SOIC-8 and the thermally enhanced LLP-8 packages. n n n n n n n Bootstrap supply voltage to 118V DC Fast propagation times (27 ns typical) Drives 1000 pF load with 15ns rise and fall times Excellent propagation delay matching (2 ns typical) Supply rail under-voltage lockout Low power consumption Pin compatible with ISL6700 Typical Applications n n n n Current Fed push-pull converters Half and Full Bridge power converters Solid state motor drives Two switch forward power converters Features n Drives both a high side and low side N-Channel MOSFET n 1A peak output current (1.0A sink / 1.0A source) n Independent TTL compatible inputs Package n SOIC-8 n LLP-8 (4 mm x 4 mm) Simplified Block Diagram 20150501 FIGURE 1. © 2005 Natio...