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Texas Instruments LM5101ASD-1/NOPB
- Part No.:
- LM5101ASD-1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM5101ASD-1/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,055
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Product details
Overview
LM5101ASD-1/NOPB from Texas Instruments is a TTL-input, 3-A peak high-side and low-side gate driver IC for synchronous buck and half-bridge power converters. It delivers 3-A peak sourcing/sinking current per output, supports bootstrap supply up to 118 V DC, achieves 25-ns typical propagation delay, and integrates a fast-recovery bootstrap diode - enabling robust N-channel MOSFET drive in high-voltage industrial motor drives and telecom power supplies.
For engineers reviewing the LM5101ASD-1/NOPB datasheet, LM5101ASD-1/NOPB pinout, LM5101ASD-1/NOPB application, or LM5101ASD-1/NOPB equivalent, key selection criteria include TTL input threshold compatibility (1.3–2.3 V), independent HI/LI logic control, 100-V HS node capability, UVLO on both VDD and HB rails, and SO PowerPAD-8 thermal performance with RθJA = 40°C/W.
Technical Context
The LM5101ASD-1/NOPB implements a robust level shifter between the TTL-input HI pin and the floating high-side driver referenced to HS, ensuring clean signal translation at high dV/dt (≤50 V/ns) while maintaining ≤10 ns delay matching between HO and LO paths. Its integrated bootstrap diode (VF = 0.8 V @ 100 mA, trr = 37 ns) enables self-powered high-side operation without external diodes.
Undervoltage lockout operates independently on VDD (6.0–7.4 V rising threshold) and HB (5.7–7.1 V rising threshold), disabling only the affected output stage during fault conditions. The device operates across –40°C to +125°C junction temperature with full 3-A peak drive capability maintained under recommended conditions (VDD = 9–14 V, HB = VHS + 8 to VHS + 14 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 3 A sourcing/sinking per output - sufficient to drive 1000-pF gate capacitance with 8-ns rise/fall times at 500-kHz switching. |
| Input Threshold Type | TTL-compatible (VIL = 1.3–2.3 V, VIHYS = 50 mV) - ensures reliable interfacing with 3.3-V or 5-V PWM controllers without level shifters. |
| Propagation Delay | 22–56 ns (typ. 25 ns) - enables precise timing control in high-frequency (>1-MHz) synchronous buck designs. |
| Bootstrap Voltage Range | Up to 118 V DC - supports high-side operation with VHS up to 100 V, critical for 48-V and 60-V bus telecom and industrial converters. |
| UVLO Thresholds | VDD: 6.0–7.4 V; HB: 5.7–7.1 V - prevents erratic switching during brownout or bootstrap capacitor undercharge. |
| Package Thermal Resistance | RθJA = 40°C/W (SO PowerPAD-8) - enables 3-A continuous drive at 125°C ambient with minimal heatsinking. |
| Switching Speed | 8 ns rise/fall time into 1000-pF load - minimizes switching losses in high-efficiency power stages. |
Pinout & Package
LM5101ASD-1/NOPB is housed in an 8-pin SO PowerPAD™ package (body size 3.90 mm × 4.89 mm) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive gate drive supply input | Supplies low-side driver and internal logic; must be locally decoupled to VSS with low-ESR/ESL capacitor. |
| HB | High-side bootstrap supply input | Connects to positive terminal of bootstrap capacitor; internal diode charges capacitor when HS ≈ 0 V. |
| HO | High-side gate driver output | Drives high-side MOSFET gate referenced to HS; requires short, low-inductance PCB trace. |
| HS | High-side source reference node | Connects to bootstrap capacitor negative terminal and high-side MOSFET source; floats with switching node. |
| LO | Low-side gate driver output | Drives low-side MOSFET gate referenced to VSS; capable of 3-A peak sink/source into capacitive loads. |
| VSS | Ground return | Common reference for all signals; exposed pad must be soldered to PCB ground plane for thermal management. |
| HI | High-side logic input | TTL-compatible control input (1.3–2.3 V threshold); unused pins must be tied to ground. |
| LI | Low-side logic input | TTL-compatible control input (1.3–2.3 V threshold); independent of HI for asymmetric drive configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | VF = 0.8 V @ 100 mA, trr = 37 ns - eliminates external diode, reduces BOM count, and improves layout reliability. |
| Independent HI/LI inputs | Enables non-overlapping drive, dead-time insertion, and asymmetric PWM schemes without external logic. |
| Matched propagation delays | ≤10 ns HO/LO delay mismatch - preserves precise timing in phase-shifted and synchronous rectifier topologies. |
| Dual-rail UVLO protection | Separate VDD and HB monitoring - prevents shoot-through by disabling only the affected output during undervoltage. |
| Robust level shifter | Operates at ≤50 V/ns dV/dt with low power consumption - ensures noise-immune high-side control in noisy power environments. |
Applications
| Industrial Motor Drives | Telecom DC-DC Converters |
|---|---|
Use Scenario: Driving high-side/low-side N-MOSFETs in 48-V input half-bridge inverters for servo motor control. IC Role / Device Role / Timing Role: Gate driver providing TTL-compatible, matched-delay, 3-A peak drive to minimize conduction and switching losses. Use Value: Enables >97% efficiency at 200-kHz switching with 1000-pF gate loads and 100-V HS node swing. |
Use Scenario: Synchronous buck regulation in 48-V telecom rectifiers delivering 12-V/30-A output. IC Role / Device Role / Timing Role: High-voltage gate driver interfacing with digital PWM controller via TTL logic levels. Use Value: Integrated bootstrap diode and dual UVLO eliminate external components and prevent latch-up during line transients. |
| Server VRMs | Renewable Energy Inverters |
Use Scenario: Dual-phase synchronous buck converter supplying CPU core voltage from 12-V intermediate bus. IC Role / Device Role / Timing Role: Low-latency (25-ns typ.), matched-output driver supporting multi-phase interleaving. Use Value: 8-ns rise/fall times reduce switching loss by >15% vs. legacy drivers, improving VRM thermal margin. |
Use Scenario: Half-bridge stage in string inverters converting 600-V PV array output to grid-synchronized AC. IC Role / Device Role / Timing Role: High-side driver with 100-V HS rating and fast level shifting for isolated gate control. Use Value: SO PowerPAD-8 package with RθJA = 40°C/W sustains 3-A drive at 85°C ambient without forced air. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side/low-side gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5101BSD-1/NOPB | 2-A peak output current; identical pinout, TTL inputs, and SO PowerPAD-8 package. | Lower gate drive strength suits <1000-pF loads or lower-frequency (<500-kHz) converters. | Select when 2-A peak suffices and thermal budget allows higher RθJA (80°C/W for same package variant). |
| UCC27211DR | 3-A peak, 5-V CMOS inputs, no integrated bootstrap diode, SOIC-8 package (RθJA = 170°C/W). | Requires external bootstrap diode and tighter layout for noise immunity; suited for cost-sensitive, non-thermal-constrained designs. | Choose when CMOS logic interface is preferred and external diode integration is acceptable for BOM flexibility. |
Compared with LM5101BSD-1/NOPB, LM5101ASD-1/NOPB delivers 50% higher peak current for faster turn-on of large gate capacitances; versus UCC27211DR, it eliminates a discrete diode and offers superior thermal performance but requires TTL-level inputs.
Availability
LM5101ASD-1/NOPB is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC-DC converters, and server VRMs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LM5101ASD-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 LM5101A series belongs to TI's high-voltage gate driver product line, engineered specifically for efficient, robust driving of N-channel MOSFETs in synchronous buck, half-bridge, and full-bridge topologies up to 100-V HS node voltage.
FAQ
What is the maximum allowable HS node voltage for LM5101ASD-1/NOPB?
The LM5101ASD-1/NOPB supports HS node voltages up to 100 V, as specified in the Recommended Operating Conditions table. This rating enables use in 48-V and 60-V bus systems where the high-side switch sees full input voltage during off-state. Exceeding 100 V may violate absolute maximum ratings and compromise reliability.
Does LM5101ASD-1/NOPB require an external bootstrap diode?
No, LM5101ASD-1/NOPB integrates a high-voltage bootstrap diode (anode to VDD, cathode to HB) with 0.8-V forward drop at 100 mA and 37-ns reverse recovery time. This eliminates the need for an external diode, simplifying layout and reducing component count in half-bridge and synchronous buck designs.
What is the input logic compatibility of LM5101ASD-1/NOPB?
LM5101ASD-1/NOPB features TTL-compatible inputs with VIL = 1.3–2.3 V (rising edge) and 50-mV hysteresis. It interfaces directly with 3.3-V and 5-V microcontrollers, DSPs, and PWM controllers without level-shifting circuitry - unlike CMOS-input variants such as LM5100A.
How does the dual UVLO function in LM5101ASD-1/NOPB?
LM5101ASD-1/NOPB implements independent UVLO on VDD (6.0–7.4 V threshold) and HB (5.7–7.1 V threshold). A VDD UVLO disables both HO and LO outputs; an HB UVLO disables only HO, preserving low-side control during bootstrap capacitor faults - preventing shoot-through while maintaining system responsiveness.
What thermal performance can be expected from the SO PowerPAD-8 package of LM5101ASD-1/NOPB?
The SO PowerPAD-8 package of LM5101ASD-1/NOPB achieves RθJA = 40°C/W on a standard 4-layer PCB with thermal vias under the exposed pad. This allows sustained 3-A peak drive at 125°C junction temperature with ≤40°C ambient rise, making it suitable for compact, convection-cooled industrial power modules.
LM5101ASD-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):
- 118 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)
LM5101ASD-1/NOPB FAQ
1.How can I place an order for LM5101ASD-1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5101ASD-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 LM5101ASD-1/NOPB reliable?
The price and inventory of LM5101ASD-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 LM5101ASD-1/NOPB is usually 5 days.
3.What payment methods are accepted for LM5101ASD-1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5101ASD-1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5101ASD-1/NOPB?
LM5101ASD-1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5101ASD-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 LM5101ASD-1/NOPB?
For technical support, including LM5101ASD-1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5101ASD-1/NOPB requirements.
6.How does Aetrix verify that LM5101ASD-1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5101ASD-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 LM5101ASD-1/NOPB meets industry standards.
7.What is the process for return or replacement of LM5101ASD-1/NOPB?
All LM5101ASD-1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5101ASD-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 LM5101ASD-1/NOPB part is unused and in its original packaging.
Return procedure for LM5101ASD-1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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