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Texas Instruments LM5101AM/NOPB
- Part No.:
- LM5101AM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5101AM/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:725
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Product details
Overview
LM5101AM/NOPB from Texas Instruments is a TTL-input, 3-A peak-output high-voltage dual gate driver for synchronous buck and half-bridge topologies, featuring independent HI/LI logic inputs, bootstrap diode integration (VHB up to 118 V), 25-ns typical propagation delay, and matched 3-ns typical delay skew between HO/LO outputs. It drives N-channel MOSFETs in industrial DC-DC converters operating up to 100 V HS node voltage.
For engineers reviewing the LM5101AM/NOPB datasheet, LM5101AM/NOPB pinout, LM5101AM/NOPB application, or LM5101AM/NOPB equivalent, this page delivers verified package mapping (SO PowerPAD-8), confirmed TTL input thresholds (1.3–2.3 V), validated UVLO thresholds (VDD = 6.0–7.4 V, VHB = 5.7–7.1 V), real-world rise/fall times (8 ns into 1000 pF), and two rigorously cross-checked alternative parts with documented functional differences.
Technical Context
The LM5101AM/NOPB implements a robust level-shifting architecture that enables clean, low-power signal translation from ground-referenced TTL logic (HI/LI) to the floating high-side driver referenced to HS, supporting operation with HS voltages up to 100 V. Its integrated bootstrap diode (VF = 0.52 V @ 100 µA, 0.8 V @ 100 mA) eliminates external components while maintaining fast recovery (tRR = 37 ns).
Undervoltage lockout operates independently on VDD and VHB–HS rails: VDD UVLO disables both outputs, while VHB UVLO disables only HO. Propagation delays are tightly matched (tMON/tMOFF ≤ 10 ns typ.) to minimize shoot-through risk in bridge configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 3 A sourcing/sinking - sufficient to drive 1000-pF gate capacitance with 8-ns rise/fall times at 500-kHz switching |
| Input Threshold Type | TTL - compatible with 3.3-V/5-V controllers without level shifters; VIL = 1.3–2.3 V, VIH = 2.0–3.0 V |
| Bootstrap Voltage Range | VHB = VHS + 8 to VHS + 14 V - supports up to 118 V DC bootstrap supply relative to VSS |
| Propagation Delay | 22–56 ns (typ. 26/45 ns) - ensures precise timing control in high-frequency (>500 kHz) power stages |
| Delay Matching | tMON/tMOFF ≤ 10 ns (typ. 4 ns) - critical for minimizing dead-time uncertainty in half-bridge PWM |
| UVLO Thresholds | VDDR = 6.0–7.4 V, VHBR = 5.7–7.1 V - prevents partial turn-on during brownout or bootstrap capacitor depletion |
| Operating Temperature | −40°C to +125°C junction - qualified for industrial and automotive under-hood environments |
Pinout & Package
LM5101AM/NOPB is packaged in an SO PowerPAD-8 (DPR) thermally enhanced plastic small-outline IC with exposed thermal pad soldered to PCB ground plane. Package dimensions: 3.90 mm × 4.89 mm, 1.75 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive gate drive supply input | Primary low-side supply rail; powers internal logic and LO stage; requires local 10-µF low-ESR decoupling to VSS |
| HB | High-side bootstrap supply input | Connects to positive terminal of bootstrap capacitor; supplies floating high-side driver stage referenced to HS |
| HO | High-side gate driver output | Drives gate of high-side N-MOSFET; referenced to HS; capable of 3-A peak sink/source into capacitive load |
| HS | High-side source reference node | Connects to source of high-side MOSFET and negative terminal of bootstrap capacitor; floats up to +100 V |
| LO | Low-side gate driver output | Drives gate of low-side N-MOSFET; referenced to VSS; 3-A peak sink/source capability |
| VSS | Ground return | Common reference for all signals except HO/HS; must be low-inductance connection to power ground plane |
| HI | High-side input control | TTL-compatible logic input controlling HO; unused pins must be tied to VSS (not left floating) |
| LI | Low-side input control | TTL-compatible logic input controlling LO; independent of HI for asymmetric drive or dead-time insertion |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Eliminates external diode; rated for 100-mA continuous current with 0.8-V forward drop and 37-ns reverse recovery |
| Independent TTL Inputs | HI and LI accept standard 3.3-V/5-V logic without pull-ups or level shifters; 50-mV hysteresis prevents noise-induced toggling |
| Dual Independent UVLO | VDD and VHB–HS monitored separately - ensures safe startup and prevents HO misfire during bootstrap failure |
| Matched Propagation Delays | ≤10 ns max skew between HO/LO turn-on/off - reduces required dead time and improves efficiency in bridge topologies |
| Thermally Enhanced Package | SO PowerPAD-8 exposes die pad to PCB ground plane, achieving RθJA = 40°C/W (4-layer board) for reliable 3-A operation |
Applications
| Synchronous Buck Converter | Half-Bridge Motor Drive |
|---|---|
|
Use Scenario: 12-V to 1-V point-of-load conversion in server VRMs with 500-kHz switching and 30-A output. IC Role / Device Role / Timing Role: Dual gate driver providing independent, TTL-compatible HI/LI control of high- and low-side MOSFETs with matched propagation to minimize conduction loss and prevent shoot-through. Use Value: 3-A peak drive sustains fast 8-ns edge rates into large gate capacitances; integrated bootstrap diode simplifies layout and improves reliability over discrete solutions. |
Use Scenario: 24-V BLDC motor controller driving 10-A phase currents with field-oriented control at 20-kHz PWM. IC Role / Device Role / Timing Role: High-voltage floating gate driver enabling HS MOSFET operation up to 100 V with precise timing alignment between HO and LO outputs. Use Value: 100-V HS rating and robust level shifter tolerate motor back-EMF transients; SO PowerPAD-8 package dissipates heat efficiently under continuous 3-A pulsed loads. |
| Current-Fed Push-Pull Converter | Two-Switch Forward Converter |
|
Use Scenario: Telecom 48-V input, 12-V output isolated DC-DC module using push-pull topology with center-tapped transformer. IC Role / Device Role / Timing Role: Dual driver delivering complementary gate signals to primary-side switches with independent logic control for asymmetry compensation. Use Value: TTL inputs interface directly with UC384x-derived controllers; UVLO on both rails ensures coordinated startup and fault shutdown across primary switches. |
Use Scenario: Industrial 36–75-V input, 5-V/20-A output power supply using active-clamp forward topology with synchronous rectification. IC Role / Device Role / Timing Role: High-side driver for main switch and low-side driver for active-clamp switch, both controlled via separate TTL inputs. Use Value: Bootstrap diode enables self-powered HS drive without auxiliary winding; 118-V VHB rating accommodates clamp voltage overshoot during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage dual gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5101M/NOPB | Same SOIC-8 package (no exposed pad); RθJA = 170°C/W vs 40°C/W for LM5101AM/NOPB; identical electrical specs | Limited to lower ambient temperatures or reduced duty cycles due to higher thermal resistance | Select LM5101AM/NOPB for >1-A continuous output current or >70°C ambient; LM5101M/NOPB only where board space excludes PowerPAD footprint |
| UCC27201ADR | CMOS inputs (VIL = 4.5–6.3 V), 4-A peak output, SOIC-8, no integrated bootstrap diode | Requires external bootstrap diode and may need level shifter for 3.3-V controllers; higher drive strength suits larger MOSFETs | Choose UCC27201ADR when CMOS logic interface is available and higher peak current (4 A) justifies added BOM cost and layout complexity |
Compared with LM5101M/NOPB, LM5101AM/NOPB delivers 4.25× better thermal performance enabling full 3-A operation in compact industrial enclosures; versus UCC27201ADR, it trades off 1-A peak current for integrated bootstrap diode and native TTL compatibility-reducing component count and layout risk in cost-sensitive 3.3-V controller designs.
Availability
LM5101AM/NOPB is available at Aetrix Electronics and suitable for synchronous buck converters, half-bridge motor drives, and current-fed push-pull power supplies requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.
Supply support for LM5101AM/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 industrial ICs.
The LM5101AM/NOPB belongs to TI's high-voltage gate driver product line, engineered specifically for efficient, robust control of N-channel MOSFETs in isolated and non-isolated DC-DC topologies operating up to 100 V HS node voltage.
FAQ
What is the maximum allowable HS node voltage for LM5101AM/NOPB?
The LM5101AM/NOPB supports HS node voltages from –1 V to +100 V relative to VSS, as specified in Recommended Operating Conditions. This allows use in high-input-voltage buck converters and half-bridge circuits where the switch node swings near the input rail. Exceeding +100 V risks damage; transient clamping via external components may be required in high-dV/dt applications.
Does LM5101AM/NOPB require an external bootstrap diode?
No, LM5101AM/NOPB integrates a high-voltage bootstrap diode with 100-mA continuous rating, 0.8-V forward drop at 100 mA, and 37-ns reverse recovery. This eliminates the need for an external diode in standard bootstrap configurations, reducing BOM count and PCB area. The diode anode connects internally to VDD and cathode to HB.
What is the input logic compatibility of LM5101AM/NOPB?
LM5101AM/NOPB features TTL-compatible inputs (HI and LI) with VIL = 1.3–2.3 V and VIH = 2.0–3.0 V, enabling direct interfacing with 3.3-V and 5-V microcontrollers, DSPs, and PWM controllers without level shifters or pull-up resistors. Unused inputs must be tied to VSS to prevent undefined states.
How does the UVLO function differ between VDD and HB rails in LM5101AM/NOPB?
LM5101AM/NOPB implements independent UVLO on both rails: VDD UVLO (6.0–7.4 V threshold) disables both HO and LO outputs, while HB UVLO (5.7–7.1 V threshold) disables only HO. This ensures safe operation-if bootstrap voltage collapses during startup or fault, the low-side remains controllable for soft shutdown or fault reporting.
What thermal performance advantage does the SO PowerPAD-8 package provide for LM5101AM/NOPB?
The SO PowerPAD-8 package of LM5101AM/NOPB achieves RθJA = 40°C/W on a 4-layer PCB, compared to 170°C/W for the standard SOIC-8 variant (LM5101M/NOPB). This 4.25× improvement allows sustained 3-A peak output current at +125°C junction temperature, making LM5101AM/NOPB suitable for high-density industrial power modules where thermal headroom is constrained.
LM5101AM/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):
- 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/NOPB FAQ
1.How can I place an order for LM5101AM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5101AM/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 LM5101AM/NOPB reliable?
The price and inventory of LM5101AM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5101AM/NOPB is usually 5 days.
3.What payment methods are accepted for LM5101AM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5101AM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5101AM/NOPB?
LM5101AM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5101AM/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 LM5101AM/NOPB?
For technical support, including LM5101AM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5101AM/NOPB requirements.
6.How does Aetrix verify that LM5101AM/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5101AM/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 LM5101AM/NOPB meets industry standards.
7.What is the process for return or replacement of LM5101AM/NOPB?
All LM5101AM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5101AM/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 LM5101AM/NOPB part is unused and in its original packaging.
Return procedure for LM5101AM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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