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Texas Instruments LM25101ASDX-1/NOPB
- Part No.:
- LM25101ASDX-1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM25101ASDX-1/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,834
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Product details
Overview
LM25101ASDX-1/NOPB from Texas Instruments is a 3-A, 80-V 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 per output, 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 - deployed in 48-V server power supplies and solar DC-DC converters.
For engineers reviewing the LM25101ASDX-1/NOPB datasheet, LM25101ASDX-1/NOPB pinout, LM25101ASDX-1/NOPB application, or LM25101ASDX-1/NOPB equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to the A-version in 8-pin SO-PowerPAD packaging.
Technical Context
The LM25101ASDX-1/NOPB integrates a robust level shifter enabling clean, high-speed switching of the high-side output referenced to the HS node, with <3-ns typical propagation delay matching between HO and LO channels. Its dual UVLO circuitry independently monitors VDD (6.9-V rising threshold) and HB–HS (6.6-V rising threshold), disabling HO during bootstrap undervoltage while maintaining LI-controlled LO operation.
It employs an internal bootstrap diode (0.85-V typical forward voltage at 100 µA) and supports external fast-recovery diode placement; the high-side driver operates with rail-to-rail output swing referenced to HS, while the low-side driver references VSS. The device requires no external bootstrap capacitor charge path beyond the integrated diode and HB/HS connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 3 A per channel - enables direct drive of high-Qg MOSFETs (e.g., >15 nC) without external buffers in 500-kHz+ converters. |
| Bootstrap Voltage Range | Up to 100 V DC - supports high-input-voltage topologies including 48-V server rails and solar MPPT stages. |
| Propagation Delay | 22–56 ns (typ. 25 ns) - ensures precise timing alignment critical for ZVS/ZCS soft-switching and dead-time control. |
| Delay Matching | 4–10 ns (typ. 3 ns) - minimizes shoot-through risk by tightly synchronizing HO/LO turn-on/turn-off edges. |
| Input Threshold | TTL-compatible (VIH = 1.3–2.3 V, VIL = 0–0.8 V) - interoperates directly with 3.3-V or 5-V PWM controllers without level shifters. |
| UVLO Thresholds | VDD: 6.9 V (±0.5 V hysteresis); HB–HS: 6.6 V (±0.4 V hysteresis) - prevents erratic switching during brownout or bootstrap capacitor undercharge. |
| Rise/Fall Time | 8 ns (CL = 1000 pF) - sustains fast edge rates essential for minimizing switching losses in GaN-compatible designs. |
Pinout & Package
LM25101ASDX-1/NOPB is packaged in an 8-pin SO PowerPAD (D package, 3.9 mm × 4.89 mm) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJB = 13.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive gate-drive supply input | Supplies low-side driver and logic; must be locally decoupled with ≤1-µF low-ESR/ESL capacitor near pin 1. |
| HB | High-side bootstrap rail | Connects to positive terminal of bootstrap capacitor; voltage relative to HS determines HO swing amplitude. |
| HO | High-side gate driver output | Drives high-side MOSFET gate; referenced to HS node - requires short, low-inductance trace to MOSFET gate. |
| HS | High-side MOSFET source connection | Return node for bootstrap capacitor negative terminal and high-side FET source; forms floating reference for HO. |
| HI | High-side control input | TTL-level input controlling HO; unused HI must be tied to VSS (not left floating) to prevent unintended turn-on. |
| LI | Low-side control input | TTL-level input controlling LO; independent of HI - enables asymmetric PWM, phase-shifted control, or dead-time insertion. |
| LO | Low-side gate driver output | Drives low-side MOSFET gate; referenced to VSS - connects directly to MOSFET gate with minimal trace inductance. |
| VSS | Ground return | Common reference for all signals except HO/HS; thermal pad must be soldered to solid ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Independent HI/LI inputs | Enables full control over high-side and low-side timing - supports advanced modulation schemes (e.g., active clamp, synchronous rectification) without external logic. |
| Integrated bootstrap diode | Eliminates need for external diode in most applications; 0.85-V forward drop at 100 µA reduces bootstrap recharge loss and simplifies layout. |
| Robust level shifter | Operates reliably at >100-V HS node dV/dt (50 V/ns rated) with low power consumption - maintains signal integrity in noisy high-voltage switching environments. |
| Dual UVLO protection | Separate VDD and HB–HS monitoring prevents partial operation: LO remains functional during bootstrap fault, while HO disables safely. |
| 8-pin SO PowerPAD package | Combines standard SOIC footprint compatibility with 3.9×4.89-mm body and exposed thermal pad - delivers 46.1°C/W junction-to-ambient thermal resistance. |
Applications
| Motor-Controlled Drivers | Half and Full Bridge Power Converters |
|---|---|
Use Scenario: Driving N-channel H-bridge for BLDC motor commutation in industrial automation systems operating from 24–48 V DC bus. IC Role / Device Role / Timing Role: Gate driver providing independent HI/LI control to enable six-step commutation with programmable dead time and fast 25-ns propagation. Use Value: 3-A peak current ensures rapid MOSFET turn-on even with high-gate-charge motors; dual UVLO prevents erratic rotation during bus voltage sag. |
Use Scenario: High-efficiency isolated DC-DC conversion in telecom rectifiers using two-switch forward topology with 48-V input. IC Role / Device Role / Timing Role: Half-bridge driver controlling primary-side switches with bootstrap-referenced high-side output and TTL-compatible inputs synchronized to controller. Use Value: 100-V bootstrap capability supports wide VIN range; 3-ns delay matching minimizes conduction overlap and improves efficiency above 95%. |
| Synchronous Buck Converters | Solar DC-DC and DC-AC Converters |
Use Scenario: Point-of-load regulation in server VRMs converting 12-V intermediate bus to sub-1-V CPU core voltage at >100-A loads. IC Role / Device Role / Timing Role: Dual-channel gate driver delivering precise, matched timing to high- and low-side MOSFETs in multiphase buck stages. Use Value: 8-ns rise/fall times reduce switching losses; SO PowerPAD package enables high-current PCB routing with low thermal resistance (13.8°C/W). |
Use Scenario: MPPT stage in string inverters converting 60–150-V PV array output to 400-V DC link with >3-kW capacity. IC Role / Device Role / Timing Role: High-voltage half-bridge driver enabling efficient step-up conversion using SiC MOSFETs with fast 500-kHz switching. Use Value: Bootstrap voltage rating up to 100 V accommodates wide PV input range; integrated diode reduces BOM count and layout area. |
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 | Higher 5-A peak current, wider 12–100-V VDD range, but larger 14-pin TSSOP package and no integrated bootstrap diode. | Better suited for >20-A power stages requiring higher gate drive strength; requires external bootstrap diode and additional PCB area. | Select LM5101AMX/NOPB when driving very high-Qg SiC or GaN FETs where 3-A is insufficient, and layout allows extra components. |
| UCC27201ADDR | 3-A output, 120-V bootstrap rating, split outputs (HO/LO), but only 105°C max junction temperature vs. 125°C for LM25101ASDX-1/NOPB. | Preferred in high-temperature ambient environments (>105°C) where LM25101ASDX-1/NOPB's 125°C rating provides margin; UCC27201ADDR lacks integrated bootstrap diode. | Choose UCC27201ADDR for ultra-high-voltage (≥100 V) or thermally constrained applications where external diode integration is acceptable. |
Compared with LM5101AMX/NOPB and UCC27201ADDR, LM25101ASDX-1/NOPB offers the optimal balance of integrated bootstrap diode, 125°C operation, compact SO PowerPAD footprint, and proven 3-A drive strength - making it ideal for space-constrained, high-reliability 48-V and solar DC-DC designs where BOM simplification and thermal headroom are critical.
Availability
LM25101ASDX-1/NOPB is available at Aetrix Electronics and suitable for 48-V server power, solar DC-DC converters, and motor-controlled drivers requiring stable component supply across long production lifecycles.
Supply support for LM25101ASDX-1/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 decades of expertise in high-reliability power conversion solutions.
The LM25101ASDX-1/NOPB belongs to TI's high-voltage gate driver product line, engineered specifically for efficient, robust control of N-channel MOSFETs in half-bridge, synchronous buck, and isolated DC-DC topologies - targeting industrial, computing, and renewable energy applications.
FAQ
What is the maximum bootstrap voltage supported by the LM25101ASDX-1/NOPB?
The LM25101ASDX-1/NOPB supports a bootstrap supply voltage up to 100 V DC, measured as the potential difference between HB and HS pins. This enables reliable high-side gate drive in 48-V, 60-V, and 100-V input power converters. Exceeding 100 V risks permanent damage per absolute maximum ratings - always verify HB–HS voltage in application waveforms using appropriate probing techniques.
Does the LM25101ASDX-1/NOPB require an external bootstrap diode?
No - the LM25101ASDX-1/NOPB integrates a bootstrap diode with 0.85-V typical forward voltage at 100 µA. An external fast-recovery diode is optional and only recommended in high-frequency (>1-MHz) or high-temperature applications where reverse recovery losses must be minimized. For standard 500-kHz operation, the internal diode suffices.
What is the purpose of the NC pins on the LM25101ASDX-1/NOPB SO PowerPAD package?
The LM25101ASDX-1/NOPB in the 8-pin SO PowerPAD (D package) has no NC (no-connect) pins - all eight pins (VDD, HB, HO, HS, HI, LI, LO, VSS) are functional. The NC designation appears only in 10-pin WSON variants (pins 5 and 6). Misidentifying NC pins on the SO PowerPAD could lead to incorrect PCB layout; always refer to the D-package pin diagram in SNVS859C Rev C.
How does the LM25101ASDX-1/NOPB handle undervoltage lockout conditions?
The LM25101ASDX-1/NOPB implements dual independent UVLO: VDD UVLO triggers at 6.9 V (±0.5 V hysteresis), holding both HO and LO low during startup; HB–HS UVLO activates at 6.6 V (±0.4 V hysteresis), disabling only HO while allowing LI-controlled LO operation. This prevents shoot-through during bootstrap capacitor charging faults without halting low-side functionality.
Can the LM25101ASDX-1/NOPB drive both high-side and low-side MOSFETs simultaneously in a full-bridge configuration?
Yes - the LM25101ASDX-1/NOPB drives one high-side and one low-side MOSFET per IC. A full-bridge requires two LM25101ASDX-1/NOPB units: one for the upper-left/lower-left leg (driving Q1/Q4), another for upper-right/lower-right (Q2/Q3). Each IC provides independent HI/LI control, enabling precise phase-shifted or complementary PWM sequencing across all four switches.
LM25101ASDX-1/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- 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):
- 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-WSON (4x4)
LM25101ASDX-1/NOPB FAQ
1.How can I place an order for LM25101ASDX-1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25101ASDX-1/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 LM25101ASDX-1/NOPB reliable?
The price and inventory of LM25101ASDX-1/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25101ASDX-1/NOPB is usually 5 days.
3.What payment methods are accepted for LM25101ASDX-1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25101ASDX-1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25101ASDX-1/NOPB?
LM25101ASDX-1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25101ASDX-1/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 LM25101ASDX-1/NOPB?
For technical support, including LM25101ASDX-1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25101ASDX-1/NOPB requirements.
6.How does Aetrix verify that LM25101ASDX-1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25101ASDX-1/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 LM25101ASDX-1/NOPB meets industry standards.
7.What is the process for return or replacement of LM25101ASDX-1/NOPB?
All LM25101ASDX-1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25101ASDX-1/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 LM25101ASDX-1/NOPB part is unused and in its original packaging.
Return procedure for LM25101ASDX-1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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