lm5109sdx National Semiconductor Corporation, lm5109sdx Datasheet

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lm5109sdx

Manufacturer Part Number
lm5109sdx
Description
100v / 1a Peak Half Bridge Gate Driver
Manufacturer
National Semiconductor Corporation
Datasheet
1.LM5109SDX.pdf (9 pages)
© 2005 National Semiconductor Corporation
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 configura-
tion. 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 con-
suming 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.
Features
n Drives both a high side and low side N-Channel
n 1A peak output current (1.0A sink / 1.0A source)
n Independent TTL compatible inputs
Simplified Block Diagram
MOSFET
DS201505
FIGURE 1.
n Bootstrap supply voltage to 118V DC
n Fast propagation times (27 ns typical)
n Drives 1000 pF load with 15ns rise and fall times
n Excellent propagation delay matching (2 ns typical)
n Supply rail under-voltage lockout
n Low power consumption
n Pin compatible with ISL6700
Typical Applications
n Current Fed push-pull converters
n Half and Full Bridge power converters
n Solid state motor drives
n Two switch forward power converters
Package
n SOIC-8
n LLP-8 (4 mm x 4 mm)
20150501
www.national.com
April 2005

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lm5109sdx Summary of contents

Page 1

... MOSFET n 1A peak output current (1.0A sink / 1.0A source) n Independent TTL compatible inputs Simplified Block Diagram © 2005 National Semiconductor Corporation n Bootstrap supply voltage to 118V DC n Fast propagation times (27 ns typical) n Drives 1000 pF load with 15ns rise and fall times n Excellent propagation delay matching (2 ns typical) ...

Page 2

... Connection Diagrams Ordering Information Ordering Number Package Type LM5109MA SOIC-8 LM5109MAX SOIC-8 LM5109SD LLP-8 LM5109SDX LLP-8 Pin Description Pin # Name SO-8 LLP Positive gate drive supply High side control input Low side control input Ground reference ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications ...

Page 4

Switching Characteristics Specifications in standard typeface are for T perature range. Unless otherwise specified, V Symbol Parameter LM5109 t Lower Turn-Off Propagation Delay (LI LPHL Falling to LO Falling) t Upper Turn-Off Propagation Delay (HI HPHL Falling to HO Falling) ...

Page 5

Typical performance Characteristics V Operating Current vs Frequency DD Operating Current vs Temperature Quiescent Current vs Voltage HB Operating Current vs Frequency 20150504 Quiescent Current vs Temperature 20150506 Propagation Delay vs Temperature 20150508 5 20150505 20150507 20150509 www.national.com ...

Page 6

Typical performance Characteristics LO and HO High Level Output Voltage vs Temperature Undervoltage Rising Thresholds vs Temperature Input Thresholds vs Temperature www.national.com (Continued) LO and HO Low Level Output Voltage vs Temperature 20150510 Undervoltage Hysteresis vs Temperature 20150514 Input Thresholds ...

Page 7

Timing Diagram Layout Considerations The optimum performance of high and low side gate drivers cannot be achieved without taking due considerations during circuit board layout. Following points are emphasized low ESR / ESL capacitor must be connected close ...

Page 8

Physical Dimensions Controlling dimension is inch. Values are millimeters. Notes: Unless otherwise specified. 1. Standard lead finish to be 200 microinches/5.08 micrometers minimum lead/tin (solder) on copper. 2. Dimension does not include mold flash. 3. Reference JEDEC ...

Page 9

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Notes: Unless otherwise specified. 1. For solder thickness and composition, see “Solder Information” in the packaging section of the National Semiconductor web page (www.national.com). 2. Maximum allowable metal burr on lead tips ...

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