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Texas Instruments LM25101AM/NOPB
- Part No.:
- LM25101AM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM25101AM/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,957
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Product details
Overview
LM25101AM/NOPB from Texas Instruments is a 3-A, 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 delivers 3-A peak sourcing/sinking current, supports bootstrap supply up to 100 V DC, achieves 25-ns typical propagation delay, and features independent TTL-input logic (HI/LI) for flexible PWM timing control - used in 48-V server power supplies and solar DC-DC converters.
For engineers reviewing the LM25101AM/NOPB datasheet, LM25101AM/NOPB pinout, LM25101AM/NOPB application, or LM25101AM/NOPB equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The LM25101AM/NOPB integrates a robust level shifter enabling clean, high-speed signal translation from ground-referenced logic inputs (HI/LI) to the floating high-side driver referenced to the HS node. Its dual-output architecture separates control paths: HO drives the gate of the high-side MOSFET referenced to HS, while LO drives the low-side MOSFET referenced to VSS - both with matched 3-A peak current capability and ≤10 ns propagation delay matching.
Undervoltage lockout (UVLO) operates independently on VDD (6.9 V rising threshold) and HB–HS (6.6 V rising threshold), ensuring safe startup and fault isolation. The integrated bootstrap diode (0.85 V forward drop at 100 µA) eliminates need for external fast-recovery diodes in many designs, and the device supports operation up to 125°C junction temperature with SO PowerPAD thermal package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 3 A sourcing/sinking per channel - enables direct drive of high-Qg MOSFETs (e.g., >15 nC) without external buffers at 500 kHz switching. |
| Bootstrap Voltage Range | Up to 100 V DC (HB–HS) - supports high-input-voltage topologies including 48-V and 60-V bus systems. |
| Propagation Delay | 22–56 ns (typ. 25 ns) - ensures precise timing alignment between HI→HO and LI→LO transitions for reduced shoot-through risk. |
| Delay Matching | ≤10 ns (typ. 4 ns) - critical for maintaining dead-time integrity in synchronous rectification and phase-shifted full-bridge designs. |
| Input Threshold | TTL-compatible: VIH = 1.8 V (min), VIL = 1.3 V (max) - interoperable with 3.3-V and 5-V controllers without level-shifting circuitry. |
| UVLO Thresholds | VDD rising: 6.9 V ±0.5 V; HB–HS rising: 6.6 V ±0.4 V - prevents erratic switching during brown-out or bootstrap capacitor undercharge. |
| Rise/Fall Time | 8 ns (CL = 1000 pF) - sustains fast edge rates required for minimizing switching losses in high-frequency (>300 kHz) converters. |
Pinout & Package
The LM25101AM/NOPB is packaged in an 8-pin SO PowerPAD (DDA) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJB = 13.8°C/W). Pin count, layout, and thermal pad placement match industry-standard SOIC-8 but with improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive gate-drive supply rail | 12-V nominal input powering both driver stages; requires local 1-µF low-ESR/ESL decoupling to VSS. |
| HB | High-side bootstrap rail | Connects to positive terminal of bootstrap capacitor; voltage referenced to HS node, not VSS. |
| HO | High-side gate driver output | Drives high-side MOSFET gate referenced to HS; must route with minimal trace inductance. |
| HS | High-side MOSFET source connection | Reference node for HO output and bootstrap capacitor negative terminal; ties directly to switch-node. |
| HI | High-side logic input | TTL-threshold input controlling HO; unused pins must be tied to VSS (not left floating). |
| LI | Low-side logic input | TTL-threshold input controlling LO; independent of HI for asymmetric or complementary PWM schemes. |
| LO | Low-side gate driver output | Drives low-side MOSFET gate referenced to VSS; optimized for fast turn-on/turn-off with 3-A peak current. |
| VSS | Ground return | Common reference for all signals except HO and HS; must connect to low-impedance system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Independent HI/LI Inputs | Enables fully asynchronous control of high- and low-side outputs - essential for active-clamp forward, LLC, and multi-phase interleaved topologies. |
| Integrated Bootstrap Diode | 0.85-V forward drop at 100 µA eliminates need for external Schottky diode in most 48-V applications, reducing BOM count and board area. |
| Matched Propagation Delay | ≤10 ns difference between HO and LO turn-on/turn-off delays - maintains tight dead-time control without external timing compensation. |
| Robust UVLO Protection | Dual-rail monitoring (VDD and HB–HS) prevents partial drive conditions that could cause shoot-through or MOSFET overstress. |
| SO PowerPAD Thermal Package | 46.1°C/W junction-to-ambient thermal resistance - supports continuous 3-A output current at 125°C ambient with standard 2-oz copper. |
Applications
| Motor-Controlled Drivers | Half and Full Bridge Power Converters |
|---|---|
Use Scenario: Brushless DC motor drive in industrial automation with 48-V bus and 20-kHz PWM frequency. IC Role / Device Role / Timing Role: Gate driver providing independent HI/LI control to manage commutation sequence and prevent shoot-through during phase transitions. Use Value: 3-A peak current ensures rapid MOSFET turn-on even with high-gate-charge motors; 25-ns propagation delay enables precise timing at high PWM frequencies. |
Use Scenario: Isolated DC-DC converter using phase-shifted full-bridge topology with 100-V input and 12-V output. IC Role / Device Role / Timing Role: Dual-channel gate driver delivering synchronized yet independently timed HO/LO signals to four power switches across two legs. Use Value: 100-V bootstrap capability supports high-input-voltage operation; matched delay preserves zero-voltage switching (ZVS) window across all phases. |
| Synchronous Buck Converters | Solar DC-DC and DC-AC Converters |
Use Scenario: Point-of-load regulator in telecom equipment converting 48-V backplane to 3.3-V/10-A CPU core supply. IC Role / Device Role / Timing Role: High-efficiency gate driver enabling synchronous rectification with adaptive dead-time control via HI/LI logic. Use Value: Low 0.25-V VOL at 100 mA minimizes conduction loss in low-VDS(on) MOSFETs; TTL inputs interface directly with digital PWM controllers. |
Use Scenario: MPPT DC-DC stage in string inverters stepping up 60–150-V PV array voltage to 400-V DC bus. IC Role / Device Role / Timing Role: High-voltage half-bridge driver managing high-side/low-side switching in boost-derived topologies with wide input range. Use Value: 100-V HB–HS rating accommodates worst-case PV open-circuit transients; thermal robustness supports uncooled outdoor deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage half-bridge gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5101AM/NOPB | Higher 6-A peak output current; wider 100-V VDD rating; no integrated bootstrap diode. | Better suited for >20-A power stages or higher-frequency designs (>1 MHz); requires external bootstrap diode. | Select when driving ultra-low-Qg GaN FETs or needing higher current headroom beyond 3 A. |
| UCC27211D | 3-A output, 120-V bootstrap rating, split outputs (HO/LO), no integrated bootstrap diode, faster 15-ns propagation. | Optimized for high-density, high-frequency GaN-based converters; lacks UVLO on HB–HS rail. | Prefer for GaN-based 600-V half-bridges where bootstrap diode loss must be minimized and timing precision is critical. |
Compared with LM25101AM/NOPB, LM5101AM/NOPB offers double the drive strength but adds complexity with external bootstrap diode routing, while UCC27211D improves speed and voltage margin at the cost of missing dual-rail UVLO - making LM25101AM/NOPB optimal for cost-sensitive, thermally constrained 48-V industrial buck and bridge designs requiring integrated simplicity and reliability.
Availability
LM25101AM/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, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM25101AM/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, embedded processing, and power management technologies, with over 50 years of innovation in high-reliability power solutions.
The LM25101AM/NOPB belongs to TI's high-voltage gate driver product line, engineered specifically for efficient, robust control of N-channel MOSFETs in isolated and non-isolated DC-DC converters, motor drives, and renewable energy systems.
FAQ
What is the maximum bootstrap voltage supported by the LM25101AM/NOPB?
The LM25101AM/NOPB supports a maximum bootstrap supply voltage (HB–HS) of 100 V DC, as specified in the Absolute Maximum Ratings table. This allows reliable operation in high-input-voltage applications such as 48-V and 60-V bus systems, provided the HS node remains within –1 V to (VDD – 15 V) during transients. The integrated bootstrap diode is rated for this voltage range and eliminates need for external diodes in most implementations.
Does the LM25101AM/NOPB require external components for bootstrap operation?
The LM25101AM/NOPB includes an integrated bootstrap diode, so no external fast-recovery diode is required for basic operation. However, a bootstrap capacitor (typically 0.1 µF ceramic) must be placed between HB and HS pins, and a gate resistor (RGATE) is recommended to dampen ringing. External diodes may still be added for enhanced reliability in high-dV/dt environments, but they are optional - not mandatory - for the LM25101AM/NOPB.
How does the LM25101AM/NOPB handle undervoltage conditions on its power rails?
The LM25101AM/NOPB implements independent undervoltage lockout (UVLO) on both VDD (6.9 V rising threshold) and HB–HS (6.6 V rising threshold). If either rail falls below its respective UVLO threshold, the corresponding output (LO for VDD, HO for HB–HS) is disabled. This dual-rail protection prevents partial drive states that could cause shoot-through or MOSFET failure - a key safety feature distinguishing LM25101AM/NOPB from simpler gate drivers.
What package type is used for the LM25101AM/NOPB, and why does it matter?
The LM25101AM/NOPB uses the 8-pin SO PowerPAD (DDA) package with an exposed thermal pad. This package delivers 46.1°C/W junction-to-ambient thermal resistance - significantly better than standard SOIC-8 (108.2°C/W) - enabling sustained 3-A output current at elevated ambient temperatures. The thermal pad must be soldered to a PCB ground plane to realize full thermal benefit, making it essential for high-power density designs like server VRMs and solar microinverters.
Can the LM25101AM/NOPB drive both high-side and low-side MOSFETs simultaneously in a synchronous buck converter?
Yes, the LM25101AM/NOPB is explicitly designed for synchronous buck and half-bridge topologies. Its independent HI and LI inputs allow full control over HO and LO timing, enabling complementary, phase-shifted, or asymmetric drive schemes. With 3-A peak current per channel and ≤10 ns delay matching, it ensures clean, shoot-through-free switching - confirmed in TI's typical application circuits for synchronous buck converters operating up to 500 kHz.
LM25101AM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- 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):
- 3A, 3A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 100 V
- Rise / Fall Time (Typ):
- 430ns, 260ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM25101AM/NOPB FAQ
1.How can I place an order for LM25101AM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25101AM/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 LM25101AM/NOPB reliable?
The price and inventory of LM25101AM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25101AM/NOPB is usually 5 days.
3.What payment methods are accepted for LM25101AM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25101AM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25101AM/NOPB?
LM25101AM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25101AM/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 LM25101AM/NOPB?
For technical support, including LM25101AM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25101AM/NOPB requirements.
6.How does Aetrix verify that LM25101AM/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25101AM/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 LM25101AM/NOPB meets industry standards.
7.What is the process for return or replacement of LM25101AM/NOPB?
All LM25101AM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25101AM/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 LM25101AM/NOPB part is unused and in its original packaging.
Return procedure for LM25101AM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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