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Texas Instruments LM5101AM
- Part No.:
- LM5101AM
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5101AM.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,729
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Product details
Overview
LM5101AM from Texas Instruments is 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 delivers 3A peak source/sink current, supports bootstrap supply up to 118V DC, features TTL-compatible inputs (1.3–2.3V VIH threshold), achieves 25 ns typical propagation delay, and operates across −40°C to +125°C junction temperature for industrial power converters.
For engineers reviewing the LM5101AM datasheet, LM5101AM pinout, LM5101AM application, or LM5101AM equivalent, this page provides verified technical context, package-specific pin functions, real-world timing and drive capability data, thermal performance metrics, and validated alternative options for high-side/low-side gate driving in isolated and non-isolated DC-DC designs.
Technical Context
The LM5101AM integrates a robust level shifter enabling high-side operation up to 100V HS-to-VSS, with an internal bootstrap diode rated for 100 mA forward current and 37 ns reverse recovery time. Its TTL-input logic interface ensures compatibility with standard microcontroller and PWM controller outputs without external level translation.
Under-voltage lockout (UVLO) is implemented separately on VDD (6.0–7.4V rising threshold) and HB (5.7–7.1V rising threshold), each with hysteresis (0.5V and 0.4V respectively), preventing erratic switching during brownout conditions. Propagation delay matching between HO and LO is tightly controlled at ≤10 ns (typical 4 ns), critical for minimizing shoot-through risk in bridge configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 3A source/sink - drives 1000 pF load with 8 ns rise/fall times, sufficient for fast-switching 600V+ MOSFETs in high-frequency SMPS. |
| Bootstrap Voltage Range | VHB = VHS + 8V to VHS + 14V - enables reliable high-side gate drive up to 100V HS node voltage with margin. |
| Propagation Delay | 22–56 ns (HI/LO to HO/LO) - low latency supports >1 MHz switching in resonant and hard-switched topologies. |
| Input Threshold | TTL-compatible: VIH = 1.3–2.3V, VIL = 0.3–0.8V - interfaces directly with 3.3V/5V logic without pull-up resistors. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and telecom power systems. |
| Package Thermal Resistance | θJA = 170°C/W (SOIC-8) - requires PCB copper pour or thermal vias for >1W continuous dissipation. |
Pinout & Package
LM5101AM is packaged in SOIC-8 (D package), with exposed pad not present. Pin 1 is VDD; pins 2–4 are HB, HO, HS for high-side drive path; pins 5–8 are HI, LI, VSS, LO for logic input and low-side output.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Low-side gate driver supply rail | Must be locally decoupled to VSS with low-ESR capacitor; powers LI/HI logic and LO driver stage. |
| 2 (HB) | High-side bootstrap supply input | Connects to positive terminal of bootstrap capacitor; supports up to 118V DC relative to VSS. |
| 3 (HO) | High-side gate driver output | Drives high-side MOSFET gate directly; output swing referenced to HS node, not VSS. |
| 4 (HS) | High-side source connection | Connects to source of high-side MOSFET and negative terminal of bootstrap capacitor; floating reference node. |
| 5 (HI) | High-side logic input | TTL-compatible control signal; unused HI must be tied to VSS to prevent floating input noise coupling. |
| 6 (LI) | Low-side logic input | TTL-compatible control signal; independent of HI, enabling asymmetric or complementary PWM schemes. |
| 7 (VSS) | Ground return | All internal logic and LO driver referenced to this node; must be low-inductance connection to system ground plane. |
| 8 (LO) | Low-side gate driver output | Drives low-side MOSFET gate with full 3A sink/source; output swing referenced to VSS. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Reduces BOM count and layout area; eliminates need for external Schottky diode in most applications. |
| Independent HI/LI inputs | Enables flexible control modes including phase-shifted, burst-mode, or dead-time programmable topologies. |
| Matched HO/LO propagation delay | ≤10 ns mismatch ensures precise timing alignment, reducing required external dead-time and improving efficiency. |
| Dual UVLO protection | Separate VDD and HB monitoring prevents false turn-on during startup or fault recovery. |
| Robust ESD rating | 2 kV HBM (except HB/HO/HS pins rated at 1 kV) - supports handling in standard manufacturing environments. |
Applications
| Synchronous Buck Converters | Half-Bridge Power Converters |
|---|---|
Use Scenario: Point-of-load (POL) regulator supplying FPGA core voltage in telecom base station equipment. IC Role / Device Role / Timing Role: Drives high-side and low-side MOSFETs in 500 kHz–1 MHz buck stage; HO/LO timing alignment minimizes conduction loss and body-diode conduction. Use Value: 3A drive strength reduces MOSFET gate charge time, enabling faster transitions and lower switching losses at high frequency. |
Use Scenario: Isolated LLC resonant converter primary-side switch driver in server PSU. IC Role / Device Role / Timing Role: Controls two N-channel MOSFETs in half-bridge configuration; HB/HS interface sustains 400V DC bus with 100V headroom. Use Value: 118V max HB-to-VSS rating allows direct use with 48V–400V input rails without auxiliary bias supplies. |
| Two-Switch Forward Converters | Current-Fed Push-Pull Converters |
Use Scenario: Industrial AC-DC front-end with two-switch forward topology delivering 24V/20A output. IC Role / Device Role / Timing Role: Synchronizes complementary switching of two MOSFETs sharing single transformer primary winding; HI/LI independence enables precise overlap control. Use Value: TTL input thresholds ensure reliable triggering from UC384x-derived controllers without level-shifting circuitry. |
Use Scenario: High-reliability aerospace DC-DC module using push-pull topology with current-fed input. IC Role / Device Role / Timing Role: Drives opposing MOSFET pairs with matched propagation delay to maintain symmetrical current waveforms and minimize transformer saturation risk. Use Value: ≤10 ns HO/LO delay mismatch preserves waveform symmetry across temperature and supply variations. |
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 |
|---|---|---|---|
| LM5101AMX/NOPB | Same silicon die, identical electrical specs; differs only in tape-and-reel packaging (2500 pcs vs. 95 pcs tube). | No functional difference; selected for automated SMT assembly requiring reel format. | Preferred for volume production with pick-and-place lines; same thermal and timing behavior as LM5101AM. |
| HIP2101IBZT | Pin-compatible but CMOS-input (VIH = 4.5–6.3V); 2A peak output; no integrated bootstrap diode. | Requires external bootstrap diode and level-shifting for 3.3V logic; lower drive current limits MOSFET selection. | Consider only if existing design uses HIP2101 footprint and 3.3V logic interface is not required. |
Compared with LM5101AM, LM5101AMX/NOPB offers identical performance in reel format for high-volume manufacturing, while HIP2101IBZT requires external components and delivers less gate current-making LM5101AM superior for new designs needing TTL compatibility, integrated diode, and 3A drive.
Availability
LM5101AM is available at Aetrix Electronics and suitable for synchronous buck converters, half-bridge inverters, and two-switch forward power supplies requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.
Supply support for LM5101AM 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 LM5100/LM5101 family was engineered specifically for high-efficiency, high-voltage DC-DC conversion in industrial, telecom, and computing power supplies-emphasizing robust gate drive, integrated bootstrap functionality, and precise timing control.
FAQ
What is the maximum allowable voltage on the HS pin of the LM5101AM?
The LM5101AM supports HS-to-VSS voltages from −5V to +100V per absolute maximum ratings. In normal operation, HS is clamped by the body diode of the low-side MOSFET, limiting negative excursions; however, transient HS voltage must never exceed VDD − 15V to avoid damage. For example, with VDD = 12V, HS must stay above −3V.
Does the LM5101AM require an external bootstrap diode?
No, the LM5101AM includes an integrated bootstrap diode rated for 100 mA forward current and 37 ns reverse recovery time. This eliminates the need for an external Schottky diode in most applications, simplifying layout and reducing BOM cost-provided the bootstrap capacitor is sized appropriately for the switching frequency and gate charge requirements of the driven MOSFET.
What is the input logic threshold type for the LM5101AM?
The LM5101AM uses TTL-compatible input thresholds: VIH (rising) is 1.3–2.3V and VIL (falling) is 0.3–0.8V, with 50 mV hysteresis. This allows direct interfacing with 3.3V or 5V microcontrollers, PWM controllers, and digital isolators without external level-shifting circuitry-unlike the CMOS-input LM5100A variants.
Can the LM5101AM drive both high-side and low-side MOSFETs simultaneously in a synchronous rectifier configuration?
Yes, the LM5101AM is explicitly designed for synchronous rectification in buck and half-bridge topologies. Its independent HI and LI inputs allow complementary or phase-shifted control, while matched HO/LO propagation delays (≤10 ns mismatch) minimize shoot-through risk. The 3A peak current ensures rapid MOSFET turn-on/off, reducing conduction losses in high-current POL applications.
What thermal considerations apply to the LM5101AM in SOIC-8 package?
The LM5101AM in SOIC-8 has θJA = 170°C/W, meaning it heats significantly under load. For continuous operation above ~0.5W dissipation, PCB copper pour under the package, thermal vias to inner ground planes, and minimized trace inductance on VDD/VSS paths are essential. Layout guidelines recommend local 10 µF low-ESR capacitors at VDD–VSS and HB–HS, placed within 3 mm of respective pins.
LM5101AM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
LM5101AM FAQ
1.How can I place an order for LM5101AM through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5101AM 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 LM5101AM reliable?
The price and inventory of LM5101AM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5101AM is usually 5 days.
3.What payment methods are accepted for LM5101AM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5101AM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5101AM?
LM5101AM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5101AM 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 LM5101AM?
For technical support, including LM5101AM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5101AM requirements.
6.How does Aetrix verify that LM5101AM is sourced from the original manufacturer or authorized distributors?
All LM5101AM 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 LM5101AM meets industry standards.
7.What is the process for return or replacement of LM5101AM?
All LM5101AM units undergo pre-shipment inspection (PSI). If there is an issue with LM5101AM, 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 LM5101AM part is unused and in its original packaging.
Return procedure for LM5101AM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5101AM Tags
-
ZXGD3009E6TA
Diodes Incorporated
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1EDN7512BXTSA1
Infineon Technologies
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UCC27517DBVR
Texas Instruments
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MCP1416T-E/OT
Microchip Technology
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MCP1402T-E/OT
Microchip Technology
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MCP1415T-E/OT
Microchip Technology
-
MCP1401T-E/OT
Microchip Technology
-
IX4428NTR
Littelfuse Inc.
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IRS2005STRPBF
Infineon Technologies
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IRS2008STRPBF
Infineon Technologies
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IX4310TTR
Littelfuse Inc.
-
2EDN7524RXTMA1
Infineon Technologies
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