LM5109B Datasheet | National Semiconductor

Description The LM5109B 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 90V. The outputs are independently controlled with TTL patible 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. Under-voltage 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. - - - - - - Fast propagation times (30 ns typical) Drives 1000 p F load with 15ns rise and fall times Excellent propagation delay matching (2 ns typical) Supply rail under-voltage lockout Low power consumption Pin patible with ISL6700 Typical Applications - - - - Current Fed push-pull converters Half and Full Bridge power converters Solid state motor drives Two switch forward power converters Features - - - - Drives both a high-side and low-side N-Channel MOSFET 1A peak output current (1.0A sink / 1.0A source) Independent TTL patible inputs Bootstrap supply voltage to 108V DC Package - SOIC-8 - LLP-8 (4 mm x 4 mm) Simplified Block Diagram FIGURE 1. © 2007 National Semiconductor Corporation .national. .Data Sheet.in Connection Diagrams FIGURE 2. Ordering Information Ordering Number LM5109BMA LM5109BMAX LM5109BSD LM5109BSDX Package Type SOIC-8 SOIC-8 LLP-8 LLP-8 M08A M08A SDC08A SDC08A NSC Package Drawing Supplied As 95 Units in anti static rails 2500 Units on Tape & Reel 1000 Units on Tape & Reel 4500 Units on Tape & Reel Pin Descriptions Pin # SO-8 1 2 3 4 5 6 7 8 LLP-8 1 2 3 4 5 6 7 8 Name VDD HI LI VSS LO HS HO HB Description Positive gate drive supply High side control input Low side control input Ground reference...