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Texas Instruments LM5100AMR/NOPB
- Part No.:
- LM5100AMR/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5100AMR/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:820
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Product details
Overview
LM5100AMR/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 CMOS-input logic thresholds, 118-V bootstrap supply capability, 25-ns typical propagation delay, and integrated bootstrap diode - enabling robust operation in industrial DC/DC converters up to 100 V HS node voltage.
For engineers reviewing the LM5100AMR/NOPB datasheet, LM5100AMR/NOPB pinout, LM5100AMR/NOPB application, or LM5100AMR/NOPB equivalent, key selection considerations 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 package thermal resistance (RθJA = 40 °C/W).
Technical Context
The LM5100AMR/NOPB integrates a high-speed level shifter that references the high-side driver to the HS node, enabling clean switching transitions with minimal delay mismatch (<10 ns) between HO and LO outputs. Its bootstrap diode (VF = 0.52 V typ. @ 100 µA) charges the external capacitor during each low-side conduction phase, sustaining gate drive for the floating high-side output.
Undervoltage lockout operates independently on VDD and HB–HS rails: VDD UVLO triggers full output disable, while HB UVLO disables only HO. The device supports TTL/CMOS-compatible inputs (CMOS for LM5100x series), with input hysteresis of 500 mV and pulldown resistance of 200 kΩ (typ.), ensuring noise immunity in noisy power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 3 A sourcing/sinking - drives 1000-pF loads with 8-ns rise/fall times for fast MOSFET switching and reduced switching losses. |
| Bootstrap Supply Voltage | Up to 118 V DC - enables high-side operation with HS node up to 100 V, supporting wide-input industrial and telecom DC/DC designs. |
| Propagation Delay | 20–45 ns (typ.) - ensures precise timing control in high-frequency (>500 kHz) synchronous rectification and bridge configurations. |
| UVLO Thresholds | VDD rising: 6.9 V; HB rising: 6.6 V - prevents erratic gate drive during brownout or startup, with 0.5 V / 0.4 V hysteresis for stable release. |
| Input Logic Type | CMOS threshold - compatible with 3.3-V or 5-V controllers; VIH = 4.5–6.3 V, VIL = 0–1.8 V, eliminating need for level translators. |
| Thermal Resistance | RθJA = 40 °C/W (SO PowerPAD-8) - enables >2 W continuous power dissipation at 125°C ambient with proper PCB copper area. |
Pinout & Package
LM5100AMR/NOPB is housed in an 8-pin SO PowerPAD™ package with exposed thermal pad soldered to PCB ground plane for enhanced heat dissipation. Pin functions are validated per TI SNOSAW2Q Rev Q datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive gate drive supply input | 12-V nominal supply rail; must be locally decoupled to VSS with low-ESR capacitor near IC for stable LO/HO operation. |
| HB | High-side bootstrap supply terminal | Connects to positive terminal of bootstrap capacitor; internal diode charges capacitor when HS ≈ GND. |
| HO | High-side gate driver output | Drives high-side MOSFET gate referenced to HS node; capable of 3-A peak current into capacitive load. |
| HS | High-side source reference node | Connects to bootstrap capacitor negative terminal and high-side MOSFET source; floats up to +100 V relative to VSS. |
| LO | Low-side gate driver output | Drives low-side MOSFET gate referenced to VSS; 3-A peak current, 0.12-V VOL @ 100 mA ensures strong turn-off. |
| VSS | Ground return | Common reference for all signals; exposed pad must be soldered to PCB ground plane for thermal and EMI performance. |
| HI | High-side input control | CMOS-compatible logic input; unused HI must be tied to VSS to prevent floating and unintended switching. |
| LI | Low-side input control | CMOS-compatible logic input; independent of HI, enabling non-overlapping or complementary PWM control schemes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | 0.52-V forward drop @ 100 µA enables efficient bootstrap capacitor recharge without external diode, reducing BOM count and layout area. |
| Independent HI/LI inputs | Full logic control freedom - supports non-overlapping, complementary, or asymmetric PWM schemes without internal cross-conduction risk. |
| Robust level shifter | Operates up to 100-V HS swing with <10-ns delay matching between HO and LO, critical for minimizing shoot-through in bridge topologies. |
| Dual-rail UVLO | Separate VDD and HB–HS monitoring prevents partial operation: VDD UVLO disables both outputs; HB UVLO disables HO only. |
| SO PowerPAD-8 package | 40 °C/W junction-to-ambient thermal resistance with exposed pad - delivers 2× thermal performance vs standard SOIC-8 for high-power density designs. |
Applications
| Industrial Synchronous Buck Converter | Half-Bridge Motor Drive Stage |
|---|---|
Use Scenario: 48-V input to 12-V/20-A output DC/DC converter in programmable logic controller (PLC) power supply. IC Role / Device Role / Timing Role: Dual-channel gate driver controlling high-side and low-side MOSFETs in synchronous rectification mode; HO/LO timing synchronized to 300-kHz PWM controller. Use Value: 3-A peak drive sustains fast 1000-pF gate charging; 25-ns propagation delay minimizes dead-time uncertainty, improving efficiency by ≥1.2% at full load. |
Use Scenario: 24-V H-bridge driving brushed DC motor in automated warehouse conveyor system. IC Role / Device Role / Timing Role: High-side/low-side driver enabling bidirectional motor control with independent HI/LI logic; HS node swings from –1 V to +24 V. Use Value: Integrated bootstrap diode eliminates external component; 100-V HS rating accommodates inductive kickback without clamping circuitry. |
| Telecom Half-Bridge DC/DC Module | Current-Fed Push-Pull Converter |
Use Scenario: 54-V telecom rectifier output feeding isolated half-bridge DC/DC stage delivering 3.3 V/40 A to server motherboard. IC Role / Device Role / Timing Role: Gate driver operating at 400 kHz with HS node referenced to floating mid-point; HO/LO driven by isolated gate driver controller. Use Value: 118-V bootstrap capability supports >50-V input range; 0.5-V UVLO hysteresis prevents oscillation during line transients. |
Use Scenario: 36-V input push-pull converter with center-tapped transformer for industrial sensor interface power. IC Role / Device Role / Timing Role: Dual high-side drivers (two LM5100AMR/NOPB) controlling push-pull switches; each HO referenced to its own transformer leg. Use Value: Independent HI inputs allow precise interleaved timing; CMOS thresholds match 3.3-V FPGA PWM outputs without level shifters. |
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 |
|---|---|---|---|
| LM5101AMR/NOPB | TTL input thresholds (VIH = 1.8 V), 3-A output, same SO PowerPAD-8 package and pinout. | Better suited for legacy 5-V microcontrollers or logic families requiring lower VIH; higher IDD (0.25 mA vs 0.1 mA quiescent). | Select LM5101AMR/NOPB when interfacing with 5-V or TTL-level controllers; otherwise LM5100AMR/NOPB preferred for 3.3-V systems. |
| UCC27201D | 2-A peak output, 120-V bootstrap, SOIC-8 (no PowerPAD), 35-ns propagation delay, no integrated bootstrap diode. | Requires external bootstrap diode; higher RθJA (170 °C/W) limits power handling; suitable for cost-sensitive, lower-current designs. | Choose UCC27201D where thermal budget allows and external diode is acceptable; avoid when >2 A drive or minimal BOM count is required. |
Compared with LM5101AMR/NOPB, LM5100AMR/NOPB offers tighter input thresholds for 3.3-V logic compatibility and lower quiescent current; versus UCC27201D, it delivers higher drive strength, integrated bootstrap diode, and superior thermal performance - making it optimal for high-efficiency, high-density industrial DC/DC designs.
Availability
LM5100AMR/NOPB is available at Aetrix Electronics and suitable for industrial DC/DC converters, motor drive stages, and telecom power modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM5100AMR/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 LM5100A/B/C family was developed specifically for high-voltage, high-efficiency synchronous buck and half-bridge power conversion - targeting industrial, telecom, and server applications demanding robust gate drive, integrated bootstrap functionality, and thermal resilience.
FAQ
What is the maximum allowable HS node voltage for LM5100AMR/NOPB?
The LM5100AMR/NOPB supports HS node voltages up to +100 V relative to VSS, as specified in the Absolute Maximum Ratings table. This enables use in 48-V and 54-V industrial and telecom systems. Transient excursions beyond this limit may cause permanent damage; design must ensure HS remains within –1 V to +100 V under all operating conditions.
Does LM5100AMR/NOPB require an external bootstrap diode?
No. LM5100AMR/NOPB integrates a high-voltage bootstrap diode (anode to VDD, cathode to HB) with 0.52-V forward voltage at 100 µA. This eliminates the need for an external diode, simplifying layout and reducing component count - confirmed in Section 8.3.3 and Electrical Characteristics Table (VDL parameter).
What is the purpose of the exposed thermal pad on the SO PowerPAD-8 package of LM5100AMR/NOPB?
The exposed thermal pad on LM5100AMR/NOPB must be soldered to a PCB ground plane to achieve its rated RθJA of 40 °C/W. This thermal path dissipates up to 2.5 W continuously at 125°C ambient, preventing thermal shutdown and ensuring reliable operation in high-current gate drive applications.
How does the UVLO function differ between VDD and HB rails in LM5100AMR/NOPB?
LM5100AMR/NOPB implements independent UVLO on both rails: VDD UVLO (6.9 V rising) disables both HO and LO outputs, while HB UVLO (6.6 V rising) disables only HO. This prevents high-side misfiring during bootstrap capacitor undercharge while allowing low-side operation - critical for fault-tolerant half-bridge designs.
Is LM5100AMR/NOPB pin-compatible with HIP2100 or HIP2101?
Yes. LM5100AMR/NOPB is explicitly documented as pin-compatible with HIP2100 and HIP2101 in the datasheet Feature list. This allows direct replacement in existing designs using those Intersil devices, retaining identical PCB layout, component placement, and interconnects without modification.
LM5100AMR/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (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):
- 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-SO PowerPad
LM5100AMR/NOPB FAQ
1.How can I place an order for LM5100AMR/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5100AMR/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 LM5100AMR/NOPB reliable?
The price and inventory of LM5100AMR/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5100AMR/NOPB is usually 5 days.
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LM5100AMR/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5100AMR/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 LM5100AMR/NOPB?
For technical support, including LM5100AMR/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5100AMR/NOPB requirements.
6.How does Aetrix verify that LM5100AMR/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5100AMR/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 LM5100AMR/NOPB meets industry standards.
7.What is the process for return or replacement of LM5100AMR/NOPB?
All LM5100AMR/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5100AMR/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 LM5100AMR/NOPB part is unused and in its original packaging.
Return procedure for LM5100AMR/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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