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Texas Instruments LM5100BMA/NOPB
- Part No.:
- LM5100BMA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5100BMA/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,514
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Product details
Overview
LM5100BMA/NOPB from Texas Instruments is a dual-channel high-voltage gate driver IC designed to independently control high-side and low-side N-channel MOSFETs in synchronous buck and half-bridge topologies. It delivers 2-A peak source/sink current, supports bootstrap supply up to 118 V DC, achieves 25-ns typical propagation delay, and features CMOS-compatible input thresholds (VIL = 4.5–6.3 V). It is used in industrial DC/DC converters where robust level shifting and rail-to-rail output drive are required.
For engineers reviewing the LM5100BMA/NOPB datasheet, LM5100BMA/NOPB pinout, LM5100BMA/NOPB application, or LM5100BMA/NOPB equivalent, key selection criteria include bootstrap diode integration, 100-V HS node capability, UVLO on both VDD and HB rails, propagation delay matching ≤10 ns, and SO PowerPAD-8 thermal performance with RθJA = 40°C/W.
Technical Context
The LM5100BMA/NOPB integrates a monolithic high-voltage bootstrap diode (VF = 0.52–0.85 V) and a robust level shifter enabling clean, low-power transitions from logic-level inputs to the floating high-side driver referenced to HS. Its independent HI/LI inputs accept CMOS thresholds, and its outputs drive 1000-pF loads with 8-ns rise/fall times.
Undervoltage lockout operates separately on VDD (6.0–7.4 V rising threshold) and HB (5.7–7.1 V), ensuring safe startup and preventing shoot-through during brownout. The device sustains HS-to-VSS voltages up to 100 V and HB-to-VSS up to 118 V, supporting wide-input industrial power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 2 A source/sink - sufficient to rapidly charge/discharge 1000-pF gate capacitance in high-frequency switching applications. |
| Propagation Delay | 20–45 ns (typ) - enables precise timing control in >1-MHz synchronous buck converters without skew-induced dead-time errors. |
| Delay Matching | ≤10 ns (tMON/tMOFF) - ensures tight overlap control between HO and LO edges, minimizing cross-conduction risk in bridge configurations. |
| Bootstrap Diode VF | 0.52 V @ 100 µA / 0.8 V @ 100 mA - low forward drop maintains efficient bootstrap capacitor recharge across temperature and load. |
| VDD UVLO Threshold | 6.0–7.4 V rising - prevents erratic operation during input rail ramp-up and provides 0.5-V hysteresis for noise immunity. |
| HS Voltage Range | –1 V to +100 V - accommodates fast-switching nodes in hard-switched topologies with body-diode clamping and layout-induced ringing. |
| Package Thermal RθJA | 40°C/W (SO PowerPAD-8) - enables 2-A continuous drive at 125°C junction temperature with minimal heatsinking. |
Pinout & Package
LM5100BMA/NOPB is housed in an 8-pin SO PowerPAD™ package with exposed thermal pad soldered to PCB ground plane. Pin 1 = VDD, Pin 2 = HB, Pin 3 = HO, Pin 4 = HS, Pin 5 = HI, Pin 6 = LI, Pin 7 = VSS, Pin 8 = LO.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive gate drive supply | Input for low-side driver and bootstrap diode anode; must be locally decoupled to VSS with low-ESR capacitor. |
| HB | Bootstrap supply input | Connects to positive terminal of bootstrap capacitor; supplies high-side driver stage referenced to HS. |
| HO | High-side gate driver output | Drives gate of high-side N-MOSFET; voltage measured relative to HS, not VSS. |
| HS | High-side source reference | Return node for high-side driver; connects to bootstrap capacitor negative terminal and MOSFET source. |
| HI | High-side input control | CMOS-threshold digital input (4.5–6.3 V); unused pins must be tied to VSS to prevent floating. |
| LI | Low-side input control | CMOS-threshold digital input (4.5–6.3 V); independent of HI for flexible PWM or complementary control. |
| VSS | Ground return | Reference for low-side driver, logic inputs, and decoupling; must connect to solid ground plane under exposed pad. |
| LO | Low-side gate driver output | Drives gate of low-side N-MOSFET; voltage measured relative to VSS. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode, reduces BOM count, and ensures matched recovery (tBS = 37 ns) with driver timing. |
| Independent HI/LI inputs | Enables non-complementary PWM schemes (e.g., active clamp, phase-shifted full-bridge) without external logic. |
| Dual-rail UVLO | Separate VDD and HB monitoring prevents high-side misfire during bootstrap capacitor discharge or supply sag. |
| Robust level shifter | Provides <3-ns delay mismatch between HO and LO paths while operating up to 100-V HS potential. |
| SO PowerPAD-8 package | Delivers 40°C/W thermal resistance and enhanced EMI performance via low-inductance exposed ground pad. |
Applications
| Industrial Synchronous Buck Converter | Half-Bridge Motor Drive Stage |
|---|---|
Use Scenario: 48-V input to 12-V/20-A output DC/DC converter in programmable logic controller (PLC) power supply. IC Role / Device Role / Timing Role: Dual gate driver controlling high-side and low-side MOSFETs in synchronous rectification mode; HO/LO timing synchronized to controller PWM with <10-ns skew. Use Value: 2-A drive strength ensures <100-ns MOSFET turn-on, reducing conduction losses by 15% vs. 1-A drivers at 500-kHz switching. |
Use Scenario: 24-V H-bridge driving brushed DC motor in automated valve actuator with regenerative braking. IC Role / Device Role / Timing Role: High-side/low-side driver enabling bidirectional current flow; level shifter withstands –1-V to +100-V HS transients during flyback. Use Value: Integrated bootstrap diode and 118-V HB rating eliminate external components, reducing board area by 25% and improving reliability. |
| Current-Fed Push-Pull Converter | Two-Switch Forward Converter |
Use Scenario: Telecom 48-V to ±15-V isolated bias supply using push-pull topology with center-tapped transformer. IC Role / Device Role / Timing Role: Drives two high-side switches alternately; UVLO on HB rail prevents misfire when one side's bootstrap capacitor discharges. Use Value: 25-ns propagation delay enables precise 50% duty-cycle control at 300 kHz, maintaining transformer flux balance. |
Use Scenario: 380-V front-end PFC output stepped down to 48-V server rail using two-switch forward with active clamp. IC Role / Device Role / Timing Role: Controls main switches and active-clamp FET; HI/LI independence allows separate timing for clamp reset pulse. Use Value: CMOS input thresholds interface directly with 3.3-V microcontroller GPIO, eliminating level-shifter ICs and associated propagation delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage dual gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5101BMA/NOPB | TTL input thresholds (VIL = 1.3–2.3 V), same 2-A drive and package | Better suited for legacy 5-V controller interfaces; requires pull-down resistors if driven from 3.3-V logic | Select when interfacing with 5-V microcontrollers or FPGA I/O banks with TTL-compatible outputs |
| UCC27201D | 2-A drive, 120-V HS rating, but no integrated bootstrap diode; SOIC-8 (no PowerPAD) | Requires external bootstrap diode and has higher RθJA (170°C/W), limiting thermal headroom at full load | Choose only if existing design uses SOIC-8 footprint and external diode is acceptable for cost or layout reasons |
Compared with LM5101BMA/NOPB, the LM5100BMA/NOPB offers higher noise immunity via CMOS thresholds and eliminates external diode dependency; versus UCC27201D, it delivers superior thermal performance and system-level integration at the cost of slightly larger SO PowerPAD footprint.
Availability
LM5100BMA/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 support, and guaranteed traceability.
Supply support for LM5100BMA/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 leader specializing in analog and embedded processing technologies, with decades of expertise in power management ICs and high-reliability industrial solutions.
The LM5100x family was developed specifically for high-efficiency, high-voltage switching power supplies-emphasizing integrated bootstrap functionality, precise timing control, and rugged operation in harsh electrical environments.
FAQ
What is the maximum allowable voltage on the HS pin of the LM5100BMA/NOPB?
The LM5100BMA/NOPB supports HS-to-VSS voltages from –1 V to +100 V under recommended operating conditions. Absolute maximum rating is 100 V, with transient tolerance up to VDD – 15 V for negative excursions. This enables use in hard-switched topologies where HS node experiences fast dV/dt and body-diode clamping.
Does the LM5100BMA/NOPB require an external bootstrap diode?
No. The LM5100BMA/NOPB integrates a high-voltage bootstrap diode with 0.52-V forward voltage at 100 µA and 37-ns reverse recovery time. This eliminates the need for an external diode, simplifying layout, reducing component count, and ensuring timing-matched bootstrap recharge in high-frequency applications.
What is the input logic threshold type for the LM5100BMA/NOPB?
The LM5100BMA/NOPB uses CMOS-compatible input thresholds: VIL = 4.5–6.3 V (rising edge) with 500-mV hysteresis. This allows direct interfacing with 5-V microcontrollers, DSPs, and PWM controllers without level shifting, unlike TTL-input variants such as LM5101BMA/NOPB.
How does the UVLO function on the HB rail affect operation of the LM5100BMA/NOPB?
The HB UVLO (5.7–7.1 V rising threshold) disables only the high-side output (HO) when bootstrap voltage falls below threshold-leaving low-side operation (LO) unaffected. This prevents shoot-through during startup or transient dropout while maintaining controller communication and fault signaling via LI/HI pins.
What thermal performance can be expected from the LM5100BMA/NOPB in SO PowerPAD-8 package?
In standard 4-layer PCB layout with exposed pad soldered to internal ground plane, the LM5100BMA/NOPB achieves RθJA = 40°C/W. At 2-A peak drive and 12-V VDD, this allows sustained operation at 125°C junction temperature with <10°C ambient rise-enabling compact, fanless industrial power designs.
LM5100BMA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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):
- 2A, 2A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 118 V
- Rise / Fall Time (Typ):
- 570ns, 430ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM5100BMA/NOPB FAQ
1.How can I place an order for LM5100BMA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5100BMA/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 LM5100BMA/NOPB reliable?
The price and inventory of LM5100BMA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5100BMA/NOPB is usually 5 days.
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LM5100BMA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5100BMA/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 LM5100BMA/NOPB?
For technical support, including LM5100BMA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5100BMA/NOPB requirements.
6.How does Aetrix verify that LM5100BMA/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5100BMA/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 LM5100BMA/NOPB meets industry standards.
7.What is the process for return or replacement of LM5100BMA/NOPB?
All LM5100BMA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5100BMA/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 LM5100BMA/NOPB part is unused and in its original packaging.
Return procedure for LM5100BMA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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