Texas Instruments LM5109BSD/NOPB

Mfr. Part

LM5109BSD/NOPB

Manufacturer

Luminary Micro Texas Instruments

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Detailed Description

High side and low side N channel MOSFET gate driver for half bridge topologies in a compact 8 WSON 4 x 4 mm package with exposed pad. Delivers 1 A source and 1 A sink peak gate drive with fast 15 ns typical rise and 15 ns fall times. Operates from 8 V to 14 V supply with non inverting independent inputs and TTL compatible thresholds. High side bootstrap driver supports up to 108 V on the switch node. Industrial junction temperature range minus 40 C to 125 C. RoHS3 compliant. Base product number LM5109. Category Integrated Circuits ICs. Classification PMIC Gate Drivers. Mounting Surface Mount. Packaging Tape and Reel TR

Key Features

Driven configuration half bridge with independent high side and low side channels

Channel type independent allows flexible dead time control in logic or firmware

Input type non inverting for straightforward PWM drive

Logic thresholds VIL 0.8 V and VIH 2.2 V work with common 3.3 V and 5 V logic

Supply voltage 8 V to 14 V typical gate driver supply range

Peak output current 1 A source and 1 A sink enables fast gate charge and discharge

Typical rise and fall times 15 ns and 15 ns for high speed switching

High side voltage capability bootstrap up to 108 V on HB HS

Low propagation and well matched timing between high and low sides

Robust operation across minus 40 C to 125 C junction temperature

RoHS3 compliant and lead free

Key Advantages

High efficiency due to fast gate transitions and tight timing match

Simple control using standard microcontrollers FPGAs or PWM controllers thanks to TTL compatible inputs

Space saving 4 x 4 mm WSON with exposed pad improves thermal performance and reduces PCB area

Supports wide range of bus voltages including 24 V 36 V 48 V and up to around 100 V systems

Independent inputs give designers precise control of dead time to reduce shoot through and EMI

Proven TI LM5109 family device with mature ecosystem and documentation

Packaging

Tape and Reel TR

Key Features

Driven configuration half bridge with independent high side and low side channels

Channel type independent allows flexible dead time control in logic or firmware

Input type non inverting for straightforward PWM drive

Logic thresholds VIL 0.8 V and VIH 2.2 V work with common 3.3 V and 5 V logic

Supply voltage 8 V to 14 V typical gate driver supply range

Peak output current 1 A source and 1 A sink enables fast gate charge and discharge

Typical rise and fall times 15 ns and 15 ns for high speed switching

High side voltage capability bootstrap up to 108 V on HB HS

Low propagation and well matched timing between high and low sides

Robust operation across minus 40 C to 125 C junction temperature

RoHS3 compliant and lead free

Key Advantages

High efficiency due to fast gate transitions and tight timing match

Simple control using standard microcontrollers FPGAs or PWM controllers thanks to TTL compatible inputs

Space saving 4 x 4 mm WSON with exposed pad improves thermal performance and reduces PCB area

Supports wide range of bus voltages including 24 V 36 V 48 V and up to around 100 V systems

Independent inputs give designers precise control of dead time to reduce shoot through and EMI

Proven TI LM5109 family device with mature ecosystem and documentation

Packaging

Package type 8 WSON also known as 8 WDFN with exposed thermal pad

Body size approximately 4 mm x 4 mm with low profile height for dense designs

Materials lead free molded plastic body with copper leadframe and large exposed pad for heat spreading

Mounting surface mount compatible with standard lead free reflow processes

Pin configuration 8 pins plus exposed pad typical mapping

• LO low side gate output to low side MOSFET

• VSS ground reference

• VDD driver supply 8 V to 14 V

• LI low side input

• HI high side input

• HB high side bootstrap supply

• HS switch node return for high side driver

• HO high side gate output to high side MOSFET

• EP exposed pad connect to ground or designated thermal plane as recommended by the datasheet

Thermal characteristics exposed pad significantly lowers thermal resistance when soldered to a solid copper area; actual thermal performance depends on PCB copper and vias; junction temperature range minus 40 C to 125 C

Electrical properties low parasitic inductance package for fast switching; logic thresholds VIL 0.8 V and VIH 2.2 V; peak gate drive 1 A source and 1 A sink

Shipping format Tape and Reel TR for automated pick and place; supplied in moisture barrier packaging with standard dry pack handling. Refer to the datasheet and packing spec for tape dimensions and moisture sensitivity guidance

Lifecycle

Status active and broadly supported at time of writing not near discontinuation to the best of public information

TI family or similar options depending on needed drive strength voltage and pinout

• LM5106 similar half bridge driver with higher drive strength around 2 A

• LM5104 related half bridge driver family

• UCC27201A 120 V half bridge driver with higher drive 3 A to 4 A class

• UCC27712 high voltage half bridge driver for higher bus voltages

Cross vendor functional alternatives validate pinout and specs before use

• Infineon IRS2101 or IRS2103 half bridge drivers

• onsemi NCP5106 half bridge gate driver

• Analog Devices LTC4440 family suitable for up to about 80 V to 100 V applications

Note these are functional alternatives and not guaranteed pin to pin equivalents. Always compare absolute maximum ratings timing thresholds and pinouts. If you need exact drop in replacements or more cross references contact Y-IC sales on our website for tailored assistance

Key Application Areas

Synchronous buck and boost converters and general half bridge DC DC stages

Full bridge and H bridge motor drives for drones robotics appliances and industrial pumps

Inverters and UPS modules up to around 100 V bus

Class D audio amplifiers

Telecom networking and server power modules at 12 V to 60 V rails

Battery powered industrial tools e bikes and light EV systems using 24 V to 48 V packs

LED lighting and laser drivers requiring fast half bridge switching

Datasheet

Y-IC hosts the most authoritative and up to date datasheet for LM5109BSD NOPB on our product page. Download it here for exact electrical specifications timing pinouts recommended PCB layout thermal information and packing details

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