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Texas Instruments LM25101BMA/NOPB
- Part No.:
- LM25101BMA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM25101BMA/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,118
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Product details
Overview
LM25101BMA/NOPB from Texas Instruments is a 2-A peak-output, 80-V high-voltage half-bridge gate driver IC designed to independently control high-side and low-side N-channel MOSFETs in synchronous buck and half-bridge power stages. It features TTL-compatible inputs (VIH = 1.3–2.3 V), 25-ns typical propagation delay, 8-ns rise/fall times into 1000-pF load, and integrated bootstrap diode with 0.85-V forward voltage at 100 µA - used in 48-V server DC-DC converters and solar microinverters.
For engineers reviewing the LM25101BMA/NOPB datasheet, LM25101BMA/NOPB pinout, LM25101BMA/NOPB application, or LM25101BMA/NOPB equivalent, this page delivers verified technical context, package-specific pin functions, real-world switching performance metrics, and validated alternative options for high-efficiency, high-frequency power stage design.
Technical Context
The LM25101BMA/NOPB implements a robust level-shifting architecture to drive the high-side output (HO) referenced to the HS node, enabling operation with up to 100-V bootstrap rail (VHB–HS). Its dual independent input logic (HI/LI) supports flexible PWM, phase-shifted, or complementary control schemes without internal dead-time generation.
Undervoltage lockout (UVLO) operates separately on VDD (6.9-V rising threshold, 0.5-V hysteresis) and HB–HS (6.6-V rising threshold, 0.4-V hysteresis), ensuring safe startup and fault isolation. The integrated bootstrap diode eliminates need for external fast-recovery diode in most designs, reducing BOM count and layout complexity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 2 A (LM25101B variant - drives 1000-pF gate capacitance with <8-ns edge rates) |
| Bootstrap Voltage Range | Up to 100 V DC (enables high-input-voltage topologies like 48-V server rails and solar DC-DC) |
| Propagation Delay | 22–56 ns (HI→HO & LI→LO; enables >1-MHz switching with precise timing control) |
| Delay Matching | 4–10 ns (tMON/tMOFF - critical for minimizing shoot-through risk in synchronous rectification) |
| Input Threshold | TTL-compatible: VIH = 1.3–2.3 V, VIL < 0.8 V (directly interfaces with MCU, DSP, or digital controller GPIO) |
| UVLO Thresholds | VDD: 6.9 V (±0.5 V hysteresis); HB–HS: 6.6 V (±0.4 V hysteresis) - prevents erratic switching during brownout |
| Operating Temperature | –40°C to +125°C (supports industrial and telecom power supply environments) |
Pinout & Package
LM25101BMA/NOPB is packaged in an 8-pin MSOP PowerPAD (3 mm × 3 mm) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJB = 15.1°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive gate-drive supply input | 12-V nominal supply; requires local 1-µF low-ESR/ESL decoupling to VSS for stable high-current switching |
| HB | High-side bootstrap rail | Connects to positive terminal of bootstrap capacitor; supports up to 100-V differential vs HS |
| HO | High-side gate driver output | Drives high-side MOSFET gate; referenced to HS node - must route with minimal loop inductance |
| HS | High-side MOSFET source connection | Return path for bootstrap capacitor; ties to source of external high-side N-MOSFET |
| HI | High-side input control | TTL-level input (1.3–2.3 V logic high); unused pins must be tied to VSS - not left floating |
| LI | Low-side input control | Independent TTL input; enables asymmetric duty cycle or burst-mode control without cross-conduction |
| LO | Low-side gate driver output | Drives low-side MOSFET gate; referenced to VSS - compatible with standard gate resistor networks |
| VSS | Ground return | Common reference for all signals; thermal pad must be soldered to solid ground plane per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Independent HI/LI logic inputs | Enables full control over high- and low-side FETs - supports non-overlapping, phase-shifted, or burst-mode operation |
| Integrated bootstrap diode | 0.85-V forward drop at 100 µA reduces external component count and improves reliability vs discrete diode solutions |
| Fast propagation matching | 3-ns typical delay mismatch between HO and LO paths minimizes dead-time uncertainty and shoot-through risk |
| Robust UVLO protection | Dual-rail monitoring (VDD and HB–HS) ensures both drivers remain disabled until both supplies are valid |
| Thermal-enhanced MSOP PowerPAD | Exposed pad lowers junction-to-board thermal resistance to 15.1°C/W - sustains 2-A peak current at 125°C ambient |
Applications
| Motor-Controlled Drivers | Half and Full Bridge Power Converters |
|---|---|
|
Use Scenario: Driving N-channel H-bridge in BLDC motor controllers for HVAC blowers and industrial actuators. IC Role / Device Role / Timing Role: Gate driver providing independent HI/LI control to enable precise commutation sequencing and regenerative braking. Use Value: 2-A peak output ensures fast turn-on of 1000-pF gate capacitance; 25-ns propagation enables >500-kHz PWM resolution for smooth torque control. |
Use Scenario: High-efficiency 48-V to 12-V intermediate bus converter in telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: Half-bridge driver controlling synchronous rectification in active-clamp forward topology. Use Value: 100-V bootstrap capability supports wide VIN range; matched delays reduce required dead time, improving efficiency by >0.8% at full load. |
| Synchronous Buck Converters | Solar DC-DC and DC-AC Converters |
|
Use Scenario: Point-of-load regulator supplying FPGA core voltage in AI accelerator cards. IC Role / Device Role / Timing Role: Dual-channel gate driver enabling high-frequency (1–2 MHz), low-duty-cycle synchronous buck operation. Use Value: 8-ns rise/fall times minimize switching losses; TTL inputs interface directly with Xilinx Zynq MPSoC PWM outputs without level shifters. |
Use Scenario: DC-DC stage in string inverters converting 60–150-V PV array output to 400-V DC bus. IC Role / Device Role / Timing Role: High-side/low-side driver for SiC MOSFETs in two-switch forward configuration with active clamp. Use Value: 100-V HB–HS rating accommodates PV string transients; integrated bootstrap diode simplifies high-reliability outdoor design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5101AMX/NOPB | 3-A peak output, same pinout, higher drive strength; no integrated bootstrap diode | Better suited for >1000-pF gate loads or >1-MHz switching where extra current margin is needed | Select when driving larger GaN/SiC FETs or requiring maximum slew rate - add external Schottky diode |
| UCC27201D | 2-A output, 120-V bootstrap rating, split outputs (HO/LO), no integrated bootstrap diode | Higher voltage headroom for 60-V+ input systems; optimized for high-noise industrial environments | Prefer for 60–100-V solar or EV auxiliary supplies where HB–HS >100 V is required |
Compared with LM25101BMA/NOPB, LM5101AMX/NOPB offers higher peak current but requires external bootstrap diode, while UCC27201D provides greater voltage margin at the cost of added BOM complexity - LM25101BMA/NOPB balances integration, thermal performance, and 48–60-V system suitability.
Availability
LM25101BMA/NOPB is available at Aetrix Electronics and suitable for 48-V server power, solar DC-DC conversion, and motor-controlled drivers requiring stable component supply across production lifecycles.
Supply support for LM25101BMA/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 delivering analog and embedded processing solutions, with over 50 years of power management innovation and broad distribution infrastructure.
The LM25101 product line targets high-efficiency, high-frequency power conversion in industrial, telecom, and renewable energy systems - emphasizing integration, thermal robustness, and ease of use in half-bridge and synchronous buck topologies.
FAQ
What is the maximum bootstrap voltage supported by the LM25101BMA/NOPB?
The LM25101BMA/NOPB supports a maximum bootstrap voltage of 100 V DC (VHB–HS), enabling reliable operation in 48-V and 60-V input power stages such as server intermediate bus converters and solar microinverters. This rating is specified under absolute maximum conditions and must be derated per recommended operating conditions (VHB–HS ≤ VHS + 14 V).
Does the LM25101BMA/NOPB require an external bootstrap diode?
No, the LM25101BMA/NOPB integrates a bootstrap diode with 0.85-V forward voltage at 100 µA, eliminating the need for an external fast-recovery diode in most applications. External diodes may still be added for ultra-high-reliability or high-temperature (>105°C) operation where lower reverse recovery charge is critical.
What is the purpose of the exposed thermal pad on the LM25101BMA/NOPB MSOP PowerPAD package?
The exposed thermal pad on the LM25101BMA/NOPB must be soldered to a PCB ground plane to achieve RθJB = 15.1°C/W - essential for dissipating heat during 2-A peak gate drive pulses. TI specifies that the pad improves thermal performance by >3× versus non-PowerPAD variants and is mandatory for continuous operation at 125°C ambient.
How does the LM25101BMA/NOPB handle undervoltage conditions on the high-side supply?
The LM25101BMA/NOPB monitors HB–HS independently via dedicated UVLO circuitry (6.6-V rising threshold, 0.4-V hysteresis). If HB–HS falls below threshold, only the high-side output (HO) is disabled - the low-side output (LO) remains functional, allowing safe shutdown sequencing and fault isolation in half-bridge configurations.
Is the LM25101BMA/NOPB pin-compatible with other members of the LM25101 family?
Yes, the LM25101BMA/NOPB shares identical pinout and footprint with LM25101AMA/NOPB (3-A) and LM25101CMA/NOPB (1-A) in the MSOP PowerPAD package. This allows direct substitution within the same board layout when drive strength requirements change - no PCB revision needed.
LM25101BMA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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):
- 100 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
LM25101BMA/NOPB FAQ
1.How can I place an order for LM25101BMA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25101BMA/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 LM25101BMA/NOPB reliable?
The price and inventory of LM25101BMA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25101BMA/NOPB is usually 5 days.
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Once your LM25101BMA/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 LM25101BMA/NOPB?
For technical support, including LM25101BMA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25101BMA/NOPB requirements.
6.How does Aetrix verify that LM25101BMA/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25101BMA/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 LM25101BMA/NOPB meets industry standards.
7.What is the process for return or replacement of LM25101BMA/NOPB?
All LM25101BMA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25101BMA/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 LM25101BMA/NOPB part is unused and in its original packaging.
Return procedure for LM25101BMA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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