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Texas Instruments LM5101BMA/NOPB
- Part No.:
- LM5101BMA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5101BMA/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:458
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Product details
Overview
LM5101BMA/NOPB from Texas Instruments is a 2-A, high-voltage dual-channel gate driver IC designed to independently control high-side and low-side N-channel MOSFETs in half-bridge and synchronous buck topologies. It features TTL-compatible inputs, 100-V HS node capability, 25-ns typical propagation delay, and integrated bootstrap diode - enabling robust operation in isolated DC-DC converters up to 100 V input.
For engineers reviewing the LM5101BMA/NOPB datasheet, LM5101BMA/NOPB pinout, LM5101BMA/NOPB application, or LM5101BMA/NOPB equivalent, key selection criteria include bootstrap diode forward voltage (0.8 V @ 100 mA), UVLO thresholds (VDD rising = 6.6 V, HB rising = 6.6 V), propagation delay matching (4 ns typical), and SO PowerPAD-8 thermal performance (RθJA = 40°C/W).
Technical Context
The LM5101BMA/NOPB implements a robust level-shifting architecture that references the high-side driver to the HS node, enabling clean, fast logic transitions from ground-referenced TTL inputs to floating high-side outputs. Its integrated bootstrap diode (VF = 0.8 V @ 100 mA, trr = 37 ns) eliminates external diode requirements while maintaining reliable charge replenishment across switching cycles.
Undervoltage lockout operates independently on VDD and HB–HS rails: VDD UVLO triggers full output disable, while HB UVLO disables only HO. Input hysteresis (50 mV) ensures noise immunity, and output stages deliver ±2-A peak current with <8-ns rise/fall times into 1000-pF loads at 12-V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | ±2 A - sufficient to drive 1000-pF gate capacitance with sub-10-ns edges in high-frequency power stages |
| Propagation Delay (tPLH/tPHL) | 26–56 ns - enables stable operation up to ~10 MHz switching frequency with timing margin |
| Delay Matching (tMON/tMOFF) | 4 ns typical - minimizes shoot-through risk in bridge configurations by synchronizing HI/LI-to-HO/LO transitions |
| Bootstrap Diode VF | 0.8 V @ 100 mA - reduces conduction loss and thermal stress vs discrete diode solutions |
| VDD UVLO Threshold | 6.6 V rising / 6.1 V falling - prevents erratic startup during brownout and ensures MOSFET VGS > 10 V before enabling |
| HS Voltage Range | −1 V to +100 V - supports wide-input industrial and telecom DC-DC converters with body-diode clamping |
| Input Logic Type | TTL - compatible with 3.3-V and 5-V controllers without level translation |
Pinout & Package
LM5101BMA/NOPB uses the SO PowerPAD-8 package (3.90 mm × 4.89 mm) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJC(bot) = 4.4°C/W). 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) | Low-side gate drive supply input | Must be decoupled locally with low-ESR capacitor; powers LI/LO and internal logic |
| HB (Pin 2) | High-side 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 node | Connects to bootstrap capacitor negative terminal and MOSFET source; floats with switch node |
| HI (Pin 5) | High-side logic input (TTL) | Active-high; 1.3–2.3 V threshold range; unused pins must be tied to GND |
| LI (Pin 6) | Low-side logic input (TTL) | Active-high; identical threshold to HI; independent control enables non-overlap timing |
| VSS (Pin 7) | Ground return reference | All low-side signals referenced here; exposed pad must be connected to PCB 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, reduces BOM count and layout area; 37-ns reverse recovery supports >1-MHz operation |
| Independent HI/LI inputs | Enables programmable dead-time insertion and asymmetric PWM schemes without external logic |
| Robust level shifter | Provides <4-ns delay matching between HO and LO paths, critical for minimizing shoot-through in bridge designs |
| Dual UVLO protection | VDD and HB–HS monitored separately - prevents partial enablement and ensures safe startup under all rail conditions |
| SO PowerPAD-8 thermal design | 40°C/W junction-to-ambient rating enables 2-A continuous drive at 125°C ambient with minimal heatsinking |
Applications
| Motor Drive Half-Bridge | Isolated Telecom DC-DC |
|---|---|
Use Scenario: Driving complementary N-channel MOSFETs in a 48-V input half-bridge motor driver stage operating at 100 kHz. IC Role / Device Role / Timing Role: LM5101BMA/NOPB provides independent TTL-input control of high- and low-side gates with precise delay matching to prevent shoot-through. Use Value: Integrated bootstrap diode and 100-V HS rating eliminate external components and support direct use with 48-V bus without level-shifters or auxiliary supplies. |
Use Scenario: Gate driving in a 36–75-V input isolated forward converter with active clamp, requiring reliable high-side operation above 60 V. IC Role / Device Role / Timing Role: LM5101BMA/NOPB serves as the floating high-side and grounded low-side driver, referenced to dynamic HS node. Use Value: 6.6-V HB UVLO and 37-ns diode recovery ensure stable bootstrap charging even under high dv/dt transients common in telecom power systems. |
| Synchronous Buck Converter | Industrial AC-DC PFC Stage |
Use Scenario: 12-V output, 20-A synchronous buck regulator powered from 48-V intermediate bus in industrial PLC power supply. IC Role / Device Role / Timing Role: LM5101BMA/NOPB drives upper and lower MOSFETs with matched propagation delays to maintain tight duty-cycle control. Use Value: ±2-A peak current and <8-ns edge rates minimize switching losses in high-current, high-frequency operation. |
Use Scenario: High-efficiency two-switch forward converter with active clamp in factory automation AC-DC front-end. IC Role / Device Role / Timing Role: LM5101BMA/NOPB controls both main switches and clamp FET via independent HI/LI inputs and robust level shift. Use Value: TTL compatibility allows direct interface with microcontroller GPIOs; SO PowerPAD thermal design sustains 2-A drive under 70°C ambient. |
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 |
|---|---|---|---|
| LM5101AMA/NOPB | 3-A peak output current; identical pinout, package, and TTL input thresholds | Higher gate charge delivery required for >1500-pF MOSFETs or >500-kHz operation | Select when driving larger GaN or SiC devices where 2-A current limits rise/fall time |
| UCC27211D | 2-A output, 120-V HS rating, CMOS inputs, no integrated bootstrap diode | Requires external bootstrap diode; better suited for ultra-high-voltage (>100 V) or precision timing-critical designs | Choose when higher HS voltage margin or tighter propagation delay tolerance (1.5 ns max mismatch) is mandatory |
Compared with LM5101AMA/NOPB and UCC27211D, LM5101BMA/NOPB offers optimal balance of current drive, integrated bootstrap functionality, and thermal performance in SO PowerPAD-8 - making it ideal for cost-sensitive, space-constrained 48–75-V industrial DC-DC designs where external diode omission improves reliability.
Availability
LM5101BMA/NOPB is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC-DC converters, and synchronous buck regulators requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM5101BMA/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 ICs.
The LM5100/LM5101 family was engineered specifically for high-efficiency, high-voltage switching power supplies - delivering integrated gate drive, bootstrap diode, and robust level shifting in compact thermally enhanced packages.
FAQ
What is the maximum allowable HS node voltage for LM5101BMA/NOPB?
The LM5101BMA/NOPB supports an HS node voltage range of −1 V to +100 V. This rating is validated per datasheet Section 7.1 Absolute Maximum Ratings and enables direct use in 48-V and 72-V industrial and telecom power systems. Transient excursions beyond −1 V must not exceed VDD − 15 V to avoid damage.
Does LM5101BMA/NOPB require an external bootstrap diode?
No. LM5101BMA/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. This eliminates the need for external diodes in standard half-bridge and synchronous buck layouts, reducing component count and board area.
What is the input logic threshold type for LM5101BMA/NOPB?
LM5101BMA/NOPB uses TTL-compatible inputs: VIH = 2.3 V min, VIL = 1.3 V max, with 50-mV hysteresis. This allows direct interfacing with 3.3-V and 5-V microcontrollers and PWM controllers without level-shifting circuitry.
How does the UVLO function differ between VDD and HB rails in LM5101BMA/NOPB?
LM5101BMA/NOPB implements independent UVLO circuits: VDD UVLO (6.6 V rising) disables both HO and LO outputs, while HB UVLO (6.6 V rising) disables only HO. This ensures safe low-side operation during bootstrap capacitor charging faults or transient HS node disturbances.
Which package variant is used by LM5101BMA/NOPB, and what is its thermal advantage?
LM5101BMA/NOPB uses the SO PowerPAD-8 package with exposed thermal pad. Its RθJA is 40°C/W (4-layer board), significantly lower than SOIC-8 (170°C/W), enabling sustained 2-A drive at 125°C junction temperature with minimal heatsinking - critical for high-power density industrial designs.
LM5101BMA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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):
- 2A, 2A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 118 V
- Rise / Fall Time (Typ):
- 570ns, 430ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM5101BMA/NOPB FAQ
1.How can I place an order for LM5101BMA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5101BMA/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 LM5101BMA/NOPB reliable?
The price and inventory of LM5101BMA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5101BMA/NOPB is usually 5 days.
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Once your LM5101BMA/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 LM5101BMA/NOPB?
For technical support, including LM5101BMA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5101BMA/NOPB requirements.
6.How does Aetrix verify that LM5101BMA/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5101BMA/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 LM5101BMA/NOPB meets industry standards.
7.What is the process for return or replacement of LM5101BMA/NOPB?
All LM5101BMA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5101BMA/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 LM5101BMA/NOPB part is unused and in its original packaging.
Return procedure for LM5101BMA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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