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Texas Instruments LM25101CSD/NOPB
- Part No.:
- LM25101CSD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LM25101CSD/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 10WSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM25101CSD/NOPB from Texas Instruments is a 1-A peak-output, 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 features TTL-compatible inputs, integrated bootstrap diode, 25-ns typical propagation delay, 8-ns rise/fall times into 1000-pF load, and dual undervoltage lockout (UVLO) on VDD and HB–HS rails - enabling robust operation in 48-V server and solar DC-DC converters.
For engineers reviewing the LM25101CSD/NOPB datasheet, LM25101CSD/NOPB pinout, LM25101CSD/NOPB application, or LM25101CSD/NOPB equivalent, key selection criteria include its 1-A peak sourcing/sinking capability (C-version), 8-pin SO PowerPAD package with exposed thermal pad, bootstrap rail tolerance up to 100 V, and precise propagation delay matching (≤10 ns max difference between HO/LO paths).
Technical Context
The LM25101CSD/NOPB implements a robust level-shifting architecture to drive the high-side output (HO) referenced to the switch node (HS), enabling operation with floating source potentials up to 100 V. Its independent HI/LI logic inputs accept TTL thresholds (VIH = 1.8 V typ, VIL = 1.3 V typ) and support full four-quadrant switching control.
Internal UVLO circuits monitor both VDD (6.9 V rising threshold) and HB–HS (6.6 V rising threshold) with hysteresis, ensuring safe startup and fault recovery. The integrated bootstrap diode (VDH = 1.0 V max at 100 mA) eliminates need for external fast-recovery diodes in most applications, while low RDS(on) output stages deliver 0.65 V max VOL at 100 mA sink current (C-version).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 1 A (C-version); sufficient to drive medium-power MOSFETs like CSD19534KCS with 17-nC gate charge at 500-kHz switching |
| Bootstrap Voltage Range | Up to 100 V DC (HB–HS); supports high-input-voltage topologies including active-clamp forward and two-switch forward converters |
| Propagation Delay | 22–56 ns (tLPLH/tHPLH); enables stable operation at >1-MHz switching frequencies with tight timing control |
| Delay Matching | ≤10 ns (tMON/tMOFF); critical for minimizing shoot-through risk in synchronous rectification and bridge-leg dead-time design |
| UVLO Thresholds | VDD: 6.9 V (rising), 6.4 V (falling); HB–HS: 6.6 V (rising), 6.2 V (falling); prevents erratic switching during brownout or bootstrap capacitor depletion |
| Supply Voltage Range | VDD = 9–14 V; optimized for 12-V gate-drive rails common in industrial and telecom power supplies |
| Rise/Fall Time | 8 ns (CL = 1000 pF); ensures fast MOSFET transitions to reduce conduction losses and EMI generation |
Pinout & Package
LM25101CSD/NOPB is housed in an 8-pin SO PowerPAD package (3.9 mm × 4.89 mm body, exposed thermal pad on bottom). The thermal pad must be soldered to PCB ground plane for reliable thermal performance (RθJB = 13.8°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive gate-drive supply input | Primary power rail for low-side driver and logic; requires local 0.1-µF ceramic decoupling to VSS |
| HB | High-side bootstrap rail | Connects to positive terminal of bootstrap capacitor; voltage referenced to HS, not VSS |
| HO | High-side gate driver output | Drives gate of high-side N-MOSFET; output referenced to HS pin, not VSS |
| HS | High-side MOSFET source connection | Return node for bootstrap capacitor and high-side FET source; forms floating reference for HO |
| HI | High-side input control | TTL-compatible logic input (1.3–1.8 V threshold); must be tied low if unused to prevent floating |
| LI | Low-side input control | TTL-compatible logic input; independent of HI, enabling asymmetric PWM or phase-shifted control |
| LO | Low-side gate driver output | Drives gate of low-side N-MOSFET; output referenced to VSS ground |
| VSS | Ground return | Common reference for all signals except HO and HS; must be low-inductance connection to system ground |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode requirement; reduces BOM count and layout area while maintaining <37-ns reverse recovery time |
| Independent HI/LI inputs | Enables full four-state control (LL, LH, HL, HH) for synchronous rectification, dead-time insertion, and fault handling |
| Dual UVLO protection | Separate monitoring of VDD and HB–HS rails prevents high-side misfiring during bootstrap capacitor discharge or supply sag |
| Low propagation delay mismatch | ≤10 ns difference between HO and LO turn-on/turn-off delays; simplifies dead-time calculation and improves efficiency |
| Thermally enhanced PowerPAD | Exposed thermal pad lowers junction-to-board resistance to 13.8°C/W, supporting 1-A continuous drive without forced air |
Applications
| Motor-Controlled Drivers | Half and Full Bridge Power Converters |
|---|---|
Use Scenario: Driving N-channel half-bridge in BLDC motor gate drivers for HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Gate driver providing independent HI/LI control to commutate three-phase inverter legs with precise timing and shoot-through prevention. Use Value: 1-A peak drive ensures fast turn-on of 100-V MOSFETs (e.g., CSD19534KCS), reducing conduction loss and thermal stress under 20-A motor phase currents. |
Use Scenario: High-efficiency 48-V input, 12-V output half-bridge DC-DC converter in telecom rectifiers. IC Role / Device Role / Timing Role: Dual-channel gate driver enabling zero-voltage switching (ZVS) via controlled dead-time and fast 8-ns edge rates. Use Value: 100-V bootstrap capability supports wide VIN range; low 25-ns propagation delay maintains timing accuracy across temperature for stable regulation. |
| Synchronous Buck Converters | Solar DC-DC and DC-AC Converters |
Use Scenario: Point-of-load regulator in server VRMs converting 12-V intermediate bus to 1-V CPU core voltage. IC Role / Device Role / Timing Role: High-side/low-side driver delivering tightly matched timing to minimize body-diode conduction and improve light-load efficiency. Use Value: ≤10 ns delay matching reduces required dead-time, increasing effective duty cycle range and enabling higher conversion efficiency at 500-kHz+ switching. |
Use Scenario: MPPT DC-DC stage in string inverters stepping up PV array voltage (30–60 V) to 400-V DC bus. IC Role / Device Role / Timing Role: Robust gate driver operating reliably across –40°C to +125°C ambient with integrated UVLO preventing latch-up during cold-start or overvoltage transients. Use Value: 100-V HB–HS rating accommodates PV open-circuit voltage surges; thermal pad ensures stable operation without heatsink in compact outdoor enclosures. |
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 |
|---|---|---|---|
| LM5101CSD/NOPB | Same 1-A peak drive, but adds enable pin and improved 105-V HB rating; higher quiescent current (0.6 mA vs 0.4 mA) | Preferred for designs requiring shutdown control or extended HV margin beyond 100 V | Select LM5101CSD/NOPB when system-level fault management or >100-V transient immunity is required |
| UCC27201D | 1-A peak drive, 120-V HB rating, faster 15-ns propagation delay, no integrated bootstrap diode | Requires external bootstrap diode; better suited for ultra-high-frequency (>2-MHz) or high-reliability aerospace use cases | Choose UCC27201D when maximum switching speed or MIL-spec qualification is prioritized over BOM simplicity |
Compared with LM5101CSD/NOPB and UCC27201D, the LM25101CSD/NOPB offers optimal balance of integration (integrated diode), thermal performance (PowerPAD), and cost for industrial 48-V and solar DC-DC applications where 100-V bootstrap margin and <1-MHz operation are sufficient.
Availability
LM25101CSD/NOPB is available at Aetrix Electronics and suitable for motor-control drivers, synchronous buck converters, half-bridge power supplies, and solar DC-DC converters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM25101CSD/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 LM25101 series was developed specifically for high-efficiency, high-voltage half-bridge and synchronous buck applications in industrial, telecom, and renewable energy systems - emphasizing integration, thermal robustness, and ease of layout.
FAQ
What is the maximum bootstrap voltage rating for LM25101CSD/NOPB?
The LM25101CSD/NOPB supports a maximum HB–HS voltage of 100 V DC, as specified in Absolute Maximum Ratings. This allows safe operation with high-input-voltage topologies such as 48-V server PSUs and solar MPPT stages where the high-side source swings near 100 V relative to ground. Exceeding this rating risks permanent damage to the internal bootstrap diode and level shifter.
Does LM25101CSD/NOPB require an external bootstrap diode?
No, LM25101CSD/NOPB integrates a bootstrap diode with 1.0 V max forward voltage at 100 mA, eliminating the need for an external fast-recovery diode in standard applications. TI recommends using the internal diode unless ultra-low forward drop (<0.5 V) or higher reverse-voltage blocking (>100 V) is required - in which case an external diode may be added in parallel.
How does the UVLO function on the HB–HS rail affect LM25101CSD/NOPB operation?
The HB–HS UVLO (6.6 V rising threshold) disables only the high-side output (HO) when bootstrap voltage falls below threshold, while preserving low-side (LO) functionality. This prevents shoot-through during bootstrap capacitor discharge but allows continued low-side operation for controlled soft-stop or fault signaling - a safety feature critical in motor drives and UPS systems.
What package type is used for LM25101CSD/NOPB and why is thermal pad connection important?
LM25101CSD/NOPB uses the 8-pin SO PowerPAD package with an exposed thermal pad on the underside. Soldering this pad to a PCB ground plane is mandatory: it reduces junction-to-board thermal resistance to 13.8°C/W, enabling reliable 1-A continuous drive without thermal derating. Omitting pad connection risks junction temperatures exceeding 125°C at rated load.
Can LM25101CSD/NOPB drive both high-side and low-side MOSFETs simultaneously in a full-bridge configuration?
Yes, LM25101CSD/NOPB can drive one leg of a full-bridge (high-side + low-side N-MOSFETs), and two LM25101CSD/NOPB devices can be used per full-bridge. Its independent HI/LI inputs allow full control of each leg's state, supporting phase-shifted or complementary PWM. However, it does not integrate cross-conduction protection - external dead-time control or microcontroller coordination remains necessary.
LM25101CSD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-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):
- 1A, 1A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 100 V
- Rise / Fall Time (Typ):
- 990ns, 715ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (4x4)
LM25101CSD/NOPB FAQ
1.How can I place an order for LM25101CSD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25101CSD/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 LM25101CSD/NOPB reliable?
The price and inventory of LM25101CSD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25101CSD/NOPB is usually 5 days.
3.What payment methods are accepted for LM25101CSD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25101CSD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25101CSD/NOPB?
LM25101CSD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25101CSD/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 LM25101CSD/NOPB?
For technical support, including LM25101CSD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25101CSD/NOPB requirements.
6.How does Aetrix verify that LM25101CSD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25101CSD/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 LM25101CSD/NOPB meets industry standards.
7.What is the process for return or replacement of LM25101CSD/NOPB?
All LM25101CSD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25101CSD/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 LM25101CSD/NOPB part is unused and in its original packaging.
Return procedure for LM25101CSD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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