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Texas Instruments LM5101AMX/NOPB
- Part No.:
- LM5101AMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5101AMX/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:23,550
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Product details
Overview
LM5101AMX/NOPB from Texas Instruments is a 3-A, high-voltage dual-channel gate driver IC designed to independently control high-side and low-side N-channel MOSFETs in synchronous buck and half-bridge topologies. It features TTL-compatible inputs, 118-V bootstrap supply capability, 25-ns typical propagation delay, and integrated bootstrap diode - enabling robust operation in isolated high-side gate drive applications such as industrial DC-DC converters.
For engineers reviewing the LM5101AMX/NOPB datasheet, LM5101AMX/NOPB pinout, LM5101AMX/NOPB application, or LM5101AMX/NOPB equivalent, this page delivers verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for power stage design continuity.
Technical Context
The LM5101AMX/NOPB integrates a high-speed level shifter that references the HO output to the HS node, enabling clean 3-ns typical propagation delay matching between high- and low-side channels. Its floating high-side driver operates up to 100 V referenced to HS, with UVLO monitoring on both VDD (6.9 V rising threshold) and HB–HS (6.6 V rising threshold) rails.
It employs an internal bootstrap diode (VF = 0.8 V @ 100 mA, trr = 37 ns) to recharge the external bootstrap capacitor each switching cycle, eliminating need for external diode. Input logic is TTL-threshold (VIL = 1.8 V typ), and outputs deliver ±3-A peak current into 1000-pF loads with 8-ns rise/fall times.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | ±3 A - sufficient to rapidly charge/discharge 1000-pF gate capacitance in <10 ns, minimizing MOSFET switching losses. |
| Bootstrap Supply Voltage | Up to 118 V DC - supports high-voltage half-bridge operation with margin above 100-V HS rail. |
| Propagation Delay | 25 ns typical - enables stable PWM operation at >1 MHz with tight timing control across LO/HO paths. |
| Input Threshold Type | TTL - compatible with 3.3-V/5-V microcontrollers and PWM controllers without level-shifting circuitry. |
| UVLO Thresholds | VDD: 6.9 V (rising), HB–HS: 6.6 V (rising) - prevents erratic switching during brown-out or startup transients. |
| Rise/Fall Time | 8 ns (CL = 1000 pF) - ensures fast edge transitions critical for minimizing overlap conduction in bridge legs. |
| Supply Rail Range | VDD: 9–14 V - optimized for standard 12-V gate drive rails with headroom for ripple and dropout. |
Pinout & Package
LM5101AMX/NOPB is packaged in SO PowerPAD-8 (DPR package), featuring an exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJA = 40°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive gate drive supply input | Primary 9–14-V supply for low-side driver and logic; must be locally decoupled to VSS with low-ESR capacitor. |
| HB (Pin 2) | High-side bootstrap supply input | Connects to positive terminal of bootstrap capacitor; supplies floating high-side driver stage referenced to HS. |
| HO (Pin 3) | High-side gate driver output | Drives gate of high-side N-MOSFET; voltage referenced to HS node, not VSS. |
| HS (Pin 4) | High-side source connection | Return path for high-side driver; connects to bootstrap capacitor negative terminal and MOSFET source. |
| HI (Pin 5) | High-side input control | TTL-compatible logic input (VIL ≤ 1.8 V); unused pins must be tied to GND to prevent floating. |
| LI (Pin 6) | Low-side input control | TTL-compatible logic input (VIL ≤ 1.8 V); independent of HI for asymmetric PWM or dead-time insertion. |
| VSS (Pin 7) | Ground return | Reference for low-side driver, logic, and decoupling; must be low-inductance connection to system ground plane. |
| LO (Pin 8) | Low-side gate driver output | Drives gate of low-side N-MOSFET; voltage referenced to VSS, not HS. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Enables self-contained high-side bias generation with 0.8-V forward drop and 37-ns reverse recovery - eliminates external diode and reduces BOM count. |
| Independent HI/LI inputs | Allows full control over high- and low-side switches, supporting non-overlapping PWM, active clamp, or synchronous rectification modes without external logic. |
| Matched propagation delays | 3-ns typical delay matching between LO and HO ensures precise timing alignment critical for minimizing shoot-through risk in bridge configurations. |
| Dual-rail UVLO protection | Separate undervoltage lockout on VDD and HB–HS rails guarantees safe startup and fault recovery - disables HO only if bootstrap fails, preserving low-side control. |
| Robust level-shifting architecture | High-speed level shifter referenced to HS enables reliable 100-V high-side operation while maintaining TTL input compatibility and low power consumption. |
Applications
| Industrial DC-DC Converters | Synchronous Buck Regulators |
|---|---|
|
Use Scenario: 48-V input to 12-V/30-A output conversion in programmable logic controller (PLC) power supplies. IC Role / Device Role / Timing Role: Dual-channel gate driver controlling high-side and low-side MOSFETs in continuous-conduction-mode synchronous buck topology. Use Value: 3-A peak drive current and 8-ns rise time reduce MOSFET switching losses by >25% vs. lower-current drivers, improving efficiency at 500-kHz switching frequency. |
Use Scenario: Point-of-load (POL) regulator supplying FPGA core voltage (0.8–1.2 V) from 5-V intermediate bus. IC Role / Device Role / Timing Role: High-side/low-side gate driver enabling precise duty-cycle control and zero-voltage switching in high-frequency buck converter. Use Value: TTL input thresholds interface directly with 3.3-V PWM controllers; matched 25-ns propagation delays ensure <1-ns skew between channels for stable regulation. |
| Half-Bridge Motor Drives | Current-Fed Push-Pull Converters |
|
Use Scenario: 24-V brushed DC motor H-bridge driver in automated warehouse conveyor systems. IC Role / Device Role / Timing Role: Dual-output gate driver providing independent HI/LI control for bidirectional motor commutation and braking. Use Value: 100-V HS rail capability accommodates inductive kickback spikes up to 80 V; dual UVLO prevents partial turn-on during voltage sag. |
Use Scenario: Telecom rectifier module converting -48-V DC to isolated 12-V output using current-fed push-pull topology. IC Role / Device Role / Timing Role: Gate driver managing complementary high-side switching in transformer-isolated current-fed stage. Use Value: Integrated bootstrap diode and 118-V HB rating support high-voltage bootstrap recharging across wide input range without external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage dual-channel gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC27211DR | CMOS-input (not TTL), 4-A peak drive, SOIC-8 package, no integrated bootstrap diode. | Requires external bootstrap diode; better suited for designs needing higher drive strength and tighter thermal specs (RθJA = 37.8°C/W). | Select when higher peak current (>3 A) and lower thermal resistance are required, and external diode integration is acceptable. |
| IRS2004PBF | CMOS-input, 2-A peak drive, 200-V HS capability, SOIC-8, no integrated bootstrap diode. | Higher voltage rating but lower drive strength; lacks TTL compatibility and requires external bootstrap diode and level-shifter support. | Choose for ultra-high-voltage applications (>100 V HS) where 2-A drive suffices and external component count is not constrained. |
Compared with UCC27211DR and IRS2004PBF, LM5101AMX/NOPB uniquely combines TTL input compatibility, integrated bootstrap diode, and 3-A drive in a thermally enhanced SO PowerPAD-8 package - making it optimal for cost-sensitive, space-constrained 12-V gate drive systems requiring minimal external components.
Availability
LM5101AMX/NOPB is available at Aetrix Electronics and suitable for industrial DC-DC converters, synchronous buck regulators, and half-bridge motor drives requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM5101AMX/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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability ICs.
The LM5101AMX/NOPB belongs to TI's high-voltage gate driver product line, engineered for efficient, compact, and robust control of N-channel MOSFETs in isolated high-side switching applications across industrial, telecom, and computing power systems.
FAQ
What is the maximum bootstrap supply voltage supported by LM5101AMX/NOPB?
The LM5101AMX/NOPB supports a maximum bootstrap supply voltage (HB to HS) of 118 V DC, as specified in Absolute Maximum Ratings. This allows reliable operation in high-voltage half-bridge configurations where the HS node swings up to 100 V, with 18-V margin for transient overshoot and layout parasitics.
Does LM5101AMX/NOPB require an external bootstrap diode?
No, LM5101AMX/NOPB includes an integrated high-voltage bootstrap diode (anode to VDD, cathode to HB) with 0.8-V forward voltage at 100 mA and 37-ns reverse recovery time. This eliminates the need for an external diode in standard bootstrap gate drive circuits.
What input logic family is compatible with LM5101AMX/NOPB?
LM5101AMX/NOPB uses TTL-compatible input thresholds: VIH ≥ 2.3 V (min), VIL ≤ 1.3 V (max) over temperature. It interfaces directly with 3.3-V and 5-V microcontrollers, DSPs, and PWM controllers without level-shifting circuitry.
How does LM5101AMX/NOPB handle undervoltage conditions on the high-side rail?
LM5101AMX/NOPB implements independent UVLO on the HB–HS rail (6.6 V rising threshold). If bootstrap voltage falls below this threshold, only the HO output is disabled - LO remains fully functional, enabling safe fault response and controlled shutdown sequences.
What package type is used for LM5101AMX/NOPB and why is thermal performance critical?
LM5101AMX/NOPB uses the SO PowerPAD-8 (DPR) package with an exposed thermal pad soldered to PCB ground. Its RθJA is 40°C/W on a 4-layer board - critical because 3-A peak currents generate significant localized heat; proper pad soldering reduces junction-to-board thermal resistance to 4.4°C/W, preventing thermal shutdown in continuous operation.
LM5101AMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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-SOIC
LM5101AMX/NOPB FAQ
1.How can I place an order for LM5101AMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5101AMX/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 LM5101AMX/NOPB reliable?
The price and inventory of LM5101AMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5101AMX/NOPB is usually 5 days.
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Once your LM5101AMX/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 LM5101AMX/NOPB?
For technical support, including LM5101AMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5101AMX/NOPB requirements.
6.How does Aetrix verify that LM5101AMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5101AMX/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 LM5101AMX/NOPB meets industry standards.
7.What is the process for return or replacement of LM5101AMX/NOPB?
All LM5101AMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5101AMX/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 LM5101AMX/NOPB part is unused and in its original packaging.
Return procedure for LM5101AMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5101AMX/NOPB Tags
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ZXGD3009E6TA
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IRS2005STRPBF
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IRS2008STRPBF
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