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Texas Instruments LM5100AMX/NOPB
- Part No.:
- LM5100AMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5100AMX/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,782
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Product details
Overview
LM5100AMX/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 power converters. It features CMOS-input logic thresholds, 118-V bootstrap supply capability, 25-ns typical propagation delay, and integrated bootstrap diode - enabling robust operation up to 100 V HS node voltage in industrial motor drives and telecom power supplies.
For engineers reviewing the LM5100AMX/NOPB datasheet, LM5100AMX/NOPB pinout, LM5100AMX/NOPB application, or LM5100AMX/NOPB equivalent, key selection criteria include bootstrap diode forward voltage (0.52 V @ 100 µA), UVLO rising thresholds (VDD = 6.9 V, HB = 6.6 V), propagation delay matching (≤10 ns), and SO PowerPAD-8 thermal performance (RθJA = 40 °C/W).
Technical Context
The LM5100AMX/NOPB integrates a high-speed level shifter that references the high-side output (HO) to the switch node (HS), enabling clean, low-power transitions from logic-level inputs to floating high-side drive. Its bootstrap diode (anode to VDD, cathode to HB) supports self-charging of the HB capacitor during each HS-to-ground transition, eliminating external diode requirements.
Undervoltage lockout operates independently on VDD and HB–HS rails: VDD UVLO (6.9 V rise / 0.5 V hysteresis) disables both outputs, while HB UVLO (6.6 V rise / 0.4 V hysteresis) disables only HO. Input logic is CMOS-compatible (VIL = 4.5–6.3 V), and output stages deliver ±3-A peak current with 8-ns rise/fall times into 1000-pF loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | ±3 A - sufficient to rapidly charge/discharge 1000-pF gate capacitance with <8-ns edge times |
| Bootstrap Supply Voltage | Up to 118 V DC - enables high-side operation with 100-V HS node in buck/half-bridge topologies |
| Propagation Delay | 20–45 ns (typ) - ensures tight timing control for high-frequency switching up to 1 MHz |
| Delay Matching (HO/LO) | ≤10 ns (max) - minimizes shoot-through risk in complementary PWM-driven bridges |
| VDD UVLO Threshold | 6.9 V rising / 0.5 V hysteresis - prevents erratic startup and ensures stable gate drive at power-up |
| Integrated Bootstrap Diode | VF = 0.52 V @ 100 µA - reduces external component count and improves boot capacitor recharge efficiency |
| Package Thermal Resistance | RθJA = 40 °C/W (SO PowerPAD-8) - supports >2 W continuous dissipation with standard PCB copper |
Pinout & Package
LM5100AMX/NOPB is packaged in an 8-pin SO PowerPAD™ (DPR package) with exposed thermal pad soldered to PCB ground plane. Pin 1 is VDD; pin 2 is HB; pin 3 is HO; pin 4 is HS; pin 5 is HI; pin 6 is LI; pin 7 is VSS; pin 8 is LO.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive gate drive supply | Primary power rail for low-side driver and logic; requires local 10-µF low-ESR decoupling to VSS |
| HB (Pin 2) | Bootstrap supply input | Connects to positive terminal of bootstrap capacitor; referenced to HS, not VSS |
| HO (Pin 3) | High-side gate driver output | Drives high-side MOSFET gate; voltage measured relative to HS, not VSS |
| HS (Pin 4) | High-side source reference | Switch node connection; ties bootstrap capacitor negative terminal and MOSFET source |
| HI (Pin 5) | High-side input control | CMOS-threshold logic input (VIL ≤ 4.5 V, VIH ≥ 6.3 V); unused pins must be grounded |
| LI (Pin 6) | Low-side input control | CMOS-threshold logic input; independent of HI, enabling non-overlapping or complementary drive |
| VSS (Pin 7) | Ground return | Reference for low-side driver, logic, and decoupling; must connect to low-inductance ground plane |
| LO (Pin 8) | Low-side gate driver output | Drives low-side MOSFET gate; voltage measured relative to VSS |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode requirement and reduces board area by ~25 mm² in half-bridge layouts |
| Independent HI/LI inputs | Enables flexible PWM schemes including dead-time insertion, phase-shifted control, and burst-mode operation |
| Robust level-shifting architecture | Supports >100-V HS node swing with <3-ns delay mismatch between HO and LO paths |
| Dual-rail UVLO protection | Prevents partial drive during brownout: VDD UVLO blocks both outputs; HB UVLO blocks HO only |
| SO PowerPAD-8 thermal design | 40 °C/W junction-to-ambient enables 2.5-W continuous operation without heatsink on 2-oz copper PCB |
Applications
| Motor Drive Inverter | Telecom DC-DC Converter |
|---|---|
Use Scenario: Driving high-side/low-side MOSFETs in a 48-V input, 12-V output synchronous buck converter for base station power modules. IC Role / Device Role / Timing Role: Gate driver providing isolated, high-current gate signals to N-channel MOSFETs with precise timing alignment and bootstrap bias generation. Use Value: Enables >95% efficiency at 500-kHz switching with 8-ns rise/fall times and <10-ns HO/LO delay skew, reducing conduction and switching losses. |
Use Scenario: Controlling half-bridge power stage in a 36–75-V telecom rectifier feeding a 12-V intermediate bus. IC Role / Device Role / Timing Role: Dual-channel driver delivering 3-A peak gate current to handle 1000-pF gate loads under high dv/dt conditions. Use Value: Integrated 118-V bootstrap diode and 100-V HS rating allow direct use without external level shifters or HV diodes, simplifying BOM and layout. |
| Industrial PLC Power Supply | EV Onboard Charger Stage |
Use Scenario: Driving synchronous rectifiers in a 24-V input, 5-V/10-A isolated flyback with active clamp. IC Role / Device Role / Timing Role: High-side/low-side driver supporting fast turn-on/off with CMOS input compatibility to microcontroller GPIOs. Use Value: CMOS input thresholds (4.5–6.3 V) ensure reliable interfacing with 5-V logic without level translators, reducing system cost and complexity. |
Use Scenario: Controlling high-frequency bridge in a 400-V DC-link two-switch forward converter for EV onboard charger PFC stage. IC Role / Device Role / Timing Role: Floating high-side driver operating at 100-V HS potential with integrated bootstrap charging and UVLO monitoring. Use Value: Dual UVLO (VDD + HB) prevents misfiring during input transients, enhancing reliability in automotive-grade power conversion systems. |
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 | TTL input thresholds (VIL = 1.3–2.3 V), same 3-A drive and SO PowerPAD-8 package | Better suited for 3.3-V or 5-V microcontroller interfaces requiring lower input voltage levels | Select when driving from low-voltage logic; verify input hysteresis (50 mV vs. 500 mV for LM5100A) meets noise immunity needs |
| HIP2101IBZT | Pin-compatible, 2-A peak output, no integrated bootstrap diode, requires external HV diode | Lacks integrated bootstrap diode; demands additional PCB area and layout care for boot loop integrity | Choose only if legacy HIP2100/2101 footprint reuse is mandatory; expect higher BOM cost and reduced reliability vs. LM5100AMX/NOPB |
Compared with LM5101AMX/NOPB, LM5100AMX/NOPB offers higher noise immunity via 500-mV input hysteresis and seamless 5-V logic compatibility; versus HIP2101IBZT, it eliminates external diode placement, reduces layout sensitivity, and improves thermal margin via superior RθJA.
Availability
LM5100AMX/NOPB is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC-DC converters, and EV onboard charger power stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM5100AMX/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 over 50 years of innovation in high-reliability power solutions.
The LM5100x family was developed specifically for high-efficiency, high-voltage switching power supplies - targeting synchronous buck, half-bridge, and active-clamp forward converters where integrated bootstrap diodes and precise timing control improve system efficiency and reduce bill-of-materials.
FAQ
What is the maximum allowable HS node voltage for LM5100AMX/NOPB?
The LM5100AMX/NOPB supports a maximum HS-to-VSS voltage of 100 V under recommended operating conditions. Absolute maximum rating is 100 V, and transient excursions beyond this - even briefly - may cause permanent damage. The device's internal level shifter and bootstrap architecture are validated for reliable operation up to this limit in synchronous buck and half-bridge configurations.
Does LM5100AMX/NOPB require an external bootstrap diode?
No, LM5100AMX/NOPB includes an integrated high-voltage bootstrap diode (anode to VDD, cathode to HB) with 0.52-V forward voltage at 100 µA and 1.0-Ω dynamic resistance. This eliminates the need for an external diode in standard bootstrap circuits, reducing component count, PCB area, and potential failure points associated with discrete diode placement and routing.
How does the UVLO function differ between VDD and HB rails in LM5100AMX/NOPB?
In LM5100AMX/NOPB, VDD UVLO (6.9 V rising, 0.5 V hysteresis) disables both HO and LO outputs until VDD stabilizes. HB UVLO (6.6 V rising, 0.4 V hysteresis) disables only HO - preserving low-side functionality during bootstrap capacitor charging faults or transient dips. This dual-rail protection prevents shoot-through while maintaining partial system operability.
What package type is used for LM5100AMX/NOPB, and how should the exposed pad be handled?
LM5100AMX/NOPB uses the SO PowerPAD-8 (DPR) package with an exposed thermal pad on the bottom. TI specifies that the pad must be soldered directly to a PCB ground plane, and recommends extending the ground copper beyond the package outline to maximize heat dissipation. Failure to connect the pad degrades thermal performance (RθJA increases from 40 to >100 °C/W) and risks thermal shutdown.
Can LM5100AMX/NOPB drive 1000-pF gate loads with specified timing performance?
Yes, LM5100AMX/NOPB is characterized to drive 1000-pF loads with 8-ns rise and fall times (tR/tF) and 20–45 ns propagation delays (tLPLH, tHPHL). These values are measured under standard test conditions (VDD = VHB = 12 V, TJ = 25°C) and remain valid across the full −40°C to +125°C junction temperature range per datasheet specifications.
LM5100AMX/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
LM5100AMX/NOPB FAQ
1.How can I place an order for LM5100AMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5100AMX/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 LM5100AMX/NOPB reliable?
The price and inventory of LM5100AMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5100AMX/NOPB is usually 5 days.
3.What payment methods are accepted for LM5100AMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5100AMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5100AMX/NOPB?
LM5100AMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5100AMX/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 LM5100AMX/NOPB?
For technical support, including LM5100AMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5100AMX/NOPB requirements.
6.How does Aetrix verify that LM5100AMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5100AMX/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 LM5100AMX/NOPB meets industry standards.
7.What is the process for return or replacement of LM5100AMX/NOPB?
All LM5100AMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5100AMX/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 LM5100AMX/NOPB part is unused and in its original packaging.
Return procedure for LM5100AMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5100AMX/NOPB Tags
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