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Texas Instruments LM5100CMAX/NOPB
- Part No.:
- LM5100CMAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5100CMAX/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,501
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Product details
Overview
LM5100CMAX/NOPB from Texas Instruments is a 1-A high-voltage dual-channel gate driver IC designed to independently control high-side and low-side N-channel MOSFETs in synchronous buck and half-bridge topologies. It features CMOS input thresholds, 100-V HS node capability, integrated bootstrap diode, 25-ns typical propagation delay, and independent UVLO on VDD (6.9 V) and HB (6.6 V). It is used in industrial DC/DC converters requiring robust isolated gate drive.
For engineers reviewing the LM5100CMAX/NOPB datasheet, LM5100CMAX/NOPB pinout, LM5100CMAX/NOPB application, or LM5100CMAX/NOPB equivalent, key selection criteria include bootstrap diode forward voltage (0.8 V @ 100 mA), peak output current (1 A), propagation delay matching (≤10 ns), thermal resistance (RθJA = 40 °C/W for SO PowerPAD-8), and compatibility with 3.3-V/5-V logic inputs.
Technical Context
The LM5100CMAX/NOPB implements a robust level-shifting architecture that enables clean, high-speed signal translation from ground-referenced logic (HI/LI) to the floating high-side driver referenced to HS. Its integrated bootstrap diode (VDH = 0.8 V, RD = 1.0 Ω) eliminates external components while supporting up to 118-V DC bootstrap supply.
UVLO circuitry operates independently on VDD and HB rails-VDD UVLO triggers at 6.9 V (typ) with 0.5-V hysteresis, while HB UVLO activates at 6.6 V (typ) with 0.4-V hysteresis-ensuring safe startup and preventing shoot-through during brownout conditions. The device supports TTL/CMOS-compatible inputs but LM5100CMAX/NOPB specifically uses CMOS thresholds (VIL = 4.5–6.3 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 1 A sourcing/sinking - sufficient to drive 1000-pF gate capacitance with 8-ns rise/fall times under load. |
| HS Node Voltage Range | −1 V to 100 V - supports high-side operation in buck converters with up to 100-V input rails. |
| Bootstrap Supply Max | 118 V DC - enables use with high-voltage bootstrap configurations without external clamping. |
| Propagation Delay | 20–45 ns (typ) - ensures tight timing control in high-frequency (>500 kHz) switching applications. |
| UVLO Thresholds | VDD: 6.9 V (rising), HB: 6.6 V (rising) - prevents erratic switching during power-up or rail sag. |
| Input Threshold Type | CMOS - compatible with standard 3.3-V or 5-V microcontroller/PWM controller outputs. |
| Thermal Resistance | RθJA = 40 °C/W (SO PowerPAD-8) - enables 1-A operation at 125°C junction temperature with proper PCB copper area. |
Pinout & Package
LM5100CMAX/NOPB is packaged in an 8-pin SO PowerPAD™ (DPR) package with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation. Pin functions are validated per TI SNOSAW2Q Rev Q datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive gate drive supply input | Primary low-side supply rail; must be locally decoupled to VSS with low-ESR capacitor near IC. |
| HB | Bootstrap supply input | Connects to positive terminal of bootstrap capacitor; internal diode charges capacitor from VDD. |
| HO | High-side gate driver output | Drives high-side MOSFET gate referenced to HS; requires short, low-inductance trace to minimize ringing. |
| HS | High-side source reference | Connects to bootstrap capacitor negative terminal and high-side MOSFET source; defines floating reference for HO. |
| LO | Low-side gate driver output | Drives low-side MOSFET gate referenced to VSS; capable of 1-A peak current into capacitive loads. |
| VSS | Ground return | Common reference for all signals except HO; exposed thermal pad must be connected to this net. |
| HI | High-side input control | CMOS-threshold logic input (4.5–6.3 V); unused pins must be tied to VSS to prevent floating. |
| LI | Low-side input control | CMOS-threshold logic input (4.5–6.3 V); independent of HI for asymmetric PWM or dead-time insertion. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Forward voltage 0.8 V @ 100 mA and dynamic resistance 1.0 Ω - eliminates external diode, reduces BOM count and layout area. |
| Independent UVLO Protection | Dual-rail monitoring (VDD and HB) with hysteresis - prevents partial turn-on and shoot-through during undervoltage transients. |
| High-Speed Level Shifter | 3-ns typical delay matching between LO and HO - enables precise dead-time control in synchronous rectification. |
| Robust Output Stages | 1-A peak sourcing/sinking with 0.28-V VOL @ 100 mA - ensures strong gate drive even under hot, high-current conditions. |
| Thermally Enhanced Package | SO PowerPAD-8 with RθJA = 40 °C/W - supports continuous 1-A operation with minimal heatsinking on 4-layer PCB. |
Applications
| Synchronous Buck Converter | Half-Bridge Motor Drive |
|---|---|
Use Scenario: 12–48 V input DC/DC conversion for FPGA core supplies in industrial PLCs. IC Role / Device Role / Timing Role: Dual-channel gate driver providing independent, high-speed control of upper/lower MOSFETs with matched propagation delays. Use Value: Enables >95% efficiency at 500 kHz switching with minimized shoot-through risk due to 10-ns max delay mismatch. |
Use Scenario: 24-V BLDC motor control in automated warehouse conveyors. IC Role / Device Role / Timing Role: Floating high-side driver enabling gate control of N-MOSFETs in phase-leg configuration with 100-V HS tolerance. Use Value: Eliminates need for isolated bias supplies or external level shifters, reducing system cost and board space by 30%. |
| Two-Switch Forward Converter | Active-Clamp Forward Converter |
Use Scenario: Telecom 48-V intermediate bus converter delivering 12 V @ 15 A to server backplanes. IC Role / Device Role / Timing Role: High-voltage gate driver managing synchronous rectification and clamp switch timing with bootstrap-based high-side bias. Use Value: Integrated 118-V bootstrap support allows direct use with 48-V input without auxiliary winding or charge pump. |
Use Scenario: Isolated 36-V battery-fed DC/DC module for EV auxiliary power units. IC Role / Device Role / Timing Role: Dual-output driver coordinating main switch and active-clamp switch with independent logic inputs (HI/LI). Use Value: CMOS input thresholds ensure reliable triggering from 3.3-V MCU outputs, avoiding level-shifter ICs in compact designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage dual-channel gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5101CMX/NOPB | TTL input thresholds (1.3–2.3 V), same 1-A output, identical pinout and package | Better suited for legacy 5-V controllers or noisy environments where lower VIH improves noise immunity | Select when interfacing with 5-V TTL logic or when tighter input hysteresis (50 mV vs 500 mV) is required for marginal signal integrity. |
| UCC27201D | 2-A peak output, 12-V VDD max, no integrated bootstrap diode, SOIC-8 package | Requires external bootstrap diode and higher VDD decoupling; optimized for lower-voltage, higher-current apps | Choose when >1-A gate drive is needed and external diode integration is acceptable; not drop-in due to missing bootstrap diode. |
Compared with LM5100CMAX/NOPB, LM5101CMX/NOPB offers lower input thresholds for TTL systems but lacks the 500-mV hysteresis beneficial in noisy industrial settings; UCC27201D delivers higher current but increases BOM count and layout complexity due to missing integrated diode and stricter VDD limit.
Availability
LM5100CMAX/NOPB is available at Aetrix Electronics and suitable for industrial DC/DC converters, motor drives, and telecom power supplies requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LM5100CMAX/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies, with over 50 years of leadership in high-reliability power IC design.
The LM5100x series was developed specifically for high-efficiency, high-voltage switching power supplies-targeting synchronous buck, half-bridge, and forward converter topologies where integrated bootstrap diodes and precise timing reduce system complexity and improve reliability.
FAQ
What is the maximum bootstrap supply voltage supported by LM5100CMAX/NOPB?
The LM5100CMAX/NOPB supports a maximum bootstrap supply voltage of 118 V DC, as specified in the Absolute Maximum Ratings table. This allows operation with high-input-voltage topologies such as 48-V or 60-V industrial DC/DC converters without external clamping. The internal bootstrap diode is rated for this voltage, and HB-to-VSS stress must remain within this limit to avoid damage.
Does LM5100CMAX/NOPB require an external bootstrap diode?
No, LM5100CMAX/NOPB does not require an external bootstrap diode-the device integrates a high-voltage diode (anode to VDD, cathode to HB) with 0.8-V forward voltage at 100 mA and 37-ns reverse recovery time. This eliminates one external component, reduces layout area, and improves reliability in high-frequency synchronous buck designs.
What is the input logic threshold type for LM5100CMAX/NOPB?
LM5100CMAX/NOPB uses CMOS-compatible input thresholds: VIL (rising) is 4.5–6.3 V over temperature, with 500-mV hysteresis. This makes it directly compatible with standard 5-V microcontrollers and PWM controllers without level shifting, unlike the TTL-input LM5101x variants which accept 1.3–2.3 V logic levels.
How does the UVLO protection work on LM5100CMAX/NOPB?
LM5100CMAX/NOPB implements independent UVLO on both VDD and HB rails: VDD UVLO triggers at 6.9 V (typ) with 0.5-V hysteresis, disabling both HO and LO; HB UVLO activates at 6.6 V (typ) with 0.4-V hysteresis, disabling only HO. This prevents shoot-through during startup or brownout while maintaining low-side functionality if HB fails.
Which package does LM5100CMAX/NOPB use, and what is its thermal performance?
LM5100CMAX/NOPB is supplied in an 8-pin SO PowerPAD™ (DPR) package with exposed thermal pad. Its junction-to-ambient thermal resistance is 40 °C/W on a standard 4-layer PCB-enabling full 1-A output current operation at 125°C junction temperature when the thermal pad is properly soldered to a solid ground plane.
LM5100CMAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Driven Configuration:
- Half-Bridge
- Channel Type:
- Independent
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 9V ~ 14V
- Logic Voltage - VIL, VIH:
- 2.3V, -
- Current - Peak Output (Source, Sink):
- 1A, 1A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 118 V
- Rise / Fall Time (Typ):
- 990ns, 715ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM5100CMAX/NOPB FAQ
1.How can I place an order for LM5100CMAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5100CMAX/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM5100CMAX/NOPB reliable?
The price and inventory of LM5100CMAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5100CMAX/NOPB is usually 5 days.
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LM5100CMAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5100CMAX/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM5100CMAX/NOPB?
For technical support, including LM5100CMAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5100CMAX/NOPB requirements.
6.How does Aetrix verify that LM5100CMAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5100CMAX/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM5100CMAX/NOPB meets industry standards.
7.What is the process for return or replacement of LM5100CMAX/NOPB?
All LM5100CMAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5100CMAX/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM5100CMAX/NOPB part is unused and in its original packaging.
Return procedure for LM5100CMAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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