LM5109 Datasheet | National Semiconductor

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 patible 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 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 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 patible inputs Package n SOIC-8 n LLP-8 (4 mm x 4 mm) Simplified Block Diagram FIGURE 1. © 2005 National Semiconductor Corporation DS201505 .national. .Data Sheet.in Connection Diagrams FIGURE 2. Ordering Information Ordering Number LM5109MA LM5109MAX LM5109SD LM5109SDX Package Type SOIC-8 SOIC-8 LLP-8 LLP-8 NSC Package Drawing M08A M08A SDC08A SDC08A Supplied As Shipped in anti static rails 2500 shipped as Tape & Reel 1000 shipped as Tape & Reel 4500 shipped as Tape & Reel Pin Description 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 Low side...