My Inquiry
My Account
Texas Instruments LM5101ASD/NOPB
- Part No.:
- LM5101ASD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LM5101ASD/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,234
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM5101ASD/NOPB from Texas Instruments is a TTL-input, 3-A peak dual high-side/low-side gate driver IC for synchronous buck and half-bridge power converters. It drives N-channel MOSFETs with independent HI/LI logic inputs, supports bootstrap supply up to 118 V DC, delivers 8-ns rise/fall times into 1000-pF load, and features integrated bootstrap diode and robust level shifter - deployed in motor drives and industrial SMPS.
For engineers reviewing the LM5101ASD/NOPB datasheet, LM5101ASD/NOPB pinout, LM5101ASD/NOPB application, or LM5101ASD/NOPB equivalent, key selection criteria include TTL input threshold (1.3–2.3 V), 22–56 ns propagation delay across temperature, ±100 mA output drive capability at 12 V, undervoltage lockout on both VDD and HB rails, and SO PowerPAD-8 package thermal performance (RθJA = 40°C/W).
Technical Context
The LM5101ASD/NOPB implements a floating high-side driver referenced to HS, enabled by an internal bootstrap diode (VF = 0.8 V @ 100 mA) and fast level-shifting circuitry that maintains ≤10 ns delay matching between HO and LO paths. Its TTL-compatible inputs (VIL = 1.3–2.3 V, VIHYS = 50 mV) interface directly with 3.3-V or 5-V controllers without external level translation.
UVLO protection operates independently on VDD (6.0–7.4 V rising threshold) and HB (5.7–7.1 V), disabling HO during bootstrap under-voltage while allowing LO to remain functional. The device sustains HS node voltages up to 100 V and supports switching slew rates <50 V/ns to ensure reliable level-shift operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 3 A sourcing/sinking - enables fast turn-on/turn-off of large gate capacitances (e.g., >2000 pF) in high-frequency converters. |
| Input Threshold Type | TTL - accepts standard 3.3-V or 5-V logic without level shifters; VIL ≤ 2.3 V, VIH ≥ 2.3 V ensures compatibility with microcontrollers and digital PWM ICs. |
| Propagation Delay | 22–56 ns (HI→HO / LI→LO) - guarantees tight timing control in phase-shifted or synchronous rectified topologies operating up to 1 MHz. |
| Bootstrap Supply Range | VHB = VHS + 8 V to VHS + 14 V - supports high-side operation with up to 100 V HS voltage and 118 V max VHB–VSS. |
| Rise/Fall Time | 8 ns into 1000-pF load - minimizes switching losses in GaN or SiC-based designs requiring sub-10-ns edge rates. |
| UVLO Thresholds | VDDR = 6.0–7.4 V, VHBR = 5.7–7.1 V - prevents erratic switching during brownout or startup; hysteresis (0.4–0.5 V) eliminates oscillation near trip points. |
| Thermal Resistance | RθJA = 40°C/W (SO PowerPAD-8) - enables 3-A drive capability at full load with ≤30°C rise above ambient under typical PCB layout. |
Pinout & Package
LM5101ASD/NOPB uses the SO PowerPAD-8 package (3.90 mm × 4.89 mm) with exposed thermal pad soldered to PCB ground plane for enhanced heat dissipation. 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 low-side supply rail; powers internal logic and low-side driver; requires local 10-µF low-ESR decoupling to VSS. |
| HB (Pin 2) | Bootstrap supply input | Anode of integrated bootstrap diode; connects to positive terminal of bootstrap capacitor; must be routed with minimal inductance. |
| HO (Pin 3) | High-side gate driver output | Drives high-side MOSFET gate referenced to HS; output swing = VHB–VHS to VHS; requires short, low-inductance trace to MOSFET gate. |
| HS (Pin 4) | High-side source reference | Switch node connection; serves as return for HO and cathode of bootstrap diode; ties to source of high-side MOSFET and bootstrap cap negative terminal. |
| HI (Pin 5) | High-side input control | TTL-compatible logic input; active-high; unused HI must be tied to VSS to prevent floating-induced shoot-through. |
| LI (Pin 6) | Low-side input control | TTL-compatible logic input; active-high; unused LI must be tied to VSS; independent of HI for asymmetric drive timing. |
| VSS (Pin 7) | Ground return | Reference for all low-side signals and internal logic; must connect to power ground plane with low-impedance path. |
| LO (Pin 8) | Low-side gate driver output | Drives low-side MOSFET gate referenced to VSS; output swing = 0 V to VVDD; capable of 3-A peak sink/source into capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | VF = 0.8 V @ 100 mA, trr = 37 ns - eliminates external diode, reduces BOM count, and improves reliability in high-reliability power supplies. |
| Independent TTL inputs | VIL = 1.3–2.3 V, VIHYS = 50 mV - enables direct interfacing with FPGA I/O banks, MCU GPIOs, and digital PWM controllers without pull-up resistors or translators. |
| Matched propagation delays | tMON/tMOFF ≤ 10 ns (max) - ensures precise dead-time control in synchronous rectification and prevents shoot-through in bridge configurations. |
| Dual-rail UVLO | Separate VDD and HB monitoring - disables HO only during bootstrap under-voltage while preserving LO functionality for safe startup sequencing. |
| SO PowerPAD-8 thermal design | RθJC(bot) = 4.4°C/W - allows >2 W continuous power dissipation with proper PCB copper area, supporting high-duty-cycle industrial applications. |
Applications
| Motor Drive Half-Bridge | Industrial Synchronous Buck |
|---|---|
|
Use Scenario: Driving N-channel MOSFETs in a 48-V BLDC motor half-bridge stage with 100-kHz PWM and 20-A peak phase current. IC Role / Device Role / Timing Role: Dual gate driver providing independent HI/LI control, 3-A peak gate current, and matched HO/LO delays to minimize conduction loss and EMI. Use Value: Enables efficient commutation with <8-ns edge rates and supports bootstrap operation up to 100 V HS voltage during regenerative braking. |
Use Scenario: High-efficiency 12-V output, 50-A synchronous buck converter in telecom rectifier with 500-kHz switching frequency. IC Role / Device Role / Timing Role: Gate driver delivering 3-A peak current to low-Qg MOSFETs, with TTL inputs compatible with UCD92xx digital controllers. Use Value: Integrated bootstrap diode and 40°C/W thermal resistance allow compact layout and stable operation at full load without forced air cooling. |
| Two-Switch Forward Converter | Active-Clamp Forward Converter |
|
Use Scenario: 380-V input, 24-V output two-switch forward converter in server PSU with 250-kHz operation and zero-voltage switching. IC Role / Device Role / Timing Role: High-side/low-side driver controlling primary-side switches with independent logic inputs and fast 22-ns propagation delay. Use Value: Robust level shifter sustains >50 V/ns HS slew rate during transition, preventing false triggering in high-dV/dt environments. |
Use Scenario: 400-V input, 12-V output active-clamp forward converter for industrial PLC power module with soft-switching requirements. IC Role / Device Role / Timing Role: Gate driver managing clamp switch and main switch with precise delay matching and bootstrap-supplied high-side bias. Use Value: Dual UVLO ensures clamp switch remains off until both VDD and HB reach valid thresholds, preventing premature clamping and overvoltage stress. |
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 |
|---|---|---|---|
| LM5101BSD/NOPB | 2-A peak output current; identical pinout, TTL inputs, and SO PowerPAD-8 package; lower drive strength reduces gate charge time for smaller MOSFETs. | Suitable for ≤15-A output converters where lower gate current suffices; thermal margin increases due to reduced I2R loss. | Select when driving MOSFETs with Qg < 30 nC and system efficiency targets prioritize lower quiescent current (0.25 mA vs. 0.4 mA). |
| UCC27201D | CMOS inputs (VIL = 4.5–6.3 V); 3-A peak; SOIC-8 (no PowerPAD); RθJA = 170°C/W; no integrated bootstrap diode. | Requires external bootstrap diode and larger PCB copper for thermal management; better suited for space-constrained but thermally relaxed designs. | Choose when CMOS-level controller interface is required and board layout allows discrete diode placement and enhanced heatsinking. |
Compared with LM5101BSD/NOPB and UCC27201D, LM5101ASD/NOPB provides highest gate drive current in a thermally optimized package with integrated bootstrap diode - making it optimal for high-power, high-density synchronous buck and half-bridge converters demanding minimal external components and robust thermal performance.
Availability
LM5101ASD/NOPB is available at Aetrix Electronics and suitable for motor drives, industrial SMPS, and telecom power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM5101ASD/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 conversion solutions.
The LM5101A series belongs to TI's high-voltage gate driver product line, engineered specifically for isolated and non-isolated DC-DC topologies requiring robust level shifting, TTL-compatible control, and integrated bootstrap functionality in industrial and automotive-grade applications.
FAQ
What is the maximum allowable HS node voltage for LM5101ASD/NOPB?
The LM5101ASD/NOPB supports HS node voltages from –1 V to +100 V per datasheet Section 7.3. This rating enables use in high-input-voltage applications such as 48-V or 60-V battery systems and telecom rectifiers. Transient excursions below –1 V must not exceed VDD – 15 V to avoid damage.
Does LM5101ASD/NOPB require an external bootstrap diode?
No. LM5101ASD/NOPB integrates a high-voltage bootstrap diode (anode to VDD, cathode to HB) with 100-mA continuous rating and 37-ns reverse recovery time. This eliminates the need for an external diode, reducing bill-of-materials count and improving reliability in high-density power designs.
What is the input voltage hysteresis for LM5101ASD/NOPB TTL inputs?
The LM5101ASD/NOPB TTL inputs feature 50 mV of hysteresis (VIHYS), as specified in Section 7.5. This narrow hysteresis ensures clean logic transitions with fast edges while maintaining compatibility with standard TTL signaling levels and minimizing susceptibility to noise-induced glitches.
Can LM5101ASD/NOPB drive both high-side and low-side MOSFETs simultaneously?
Yes. LM5101ASD/NOPB provides fully independent HI and LI inputs, allowing simultaneous or asynchronous control of HO and LO outputs. The logic table in Section 8.4 confirms that HI = H and LI = H results in HO = H and LO = H - enabling synchronous rectification or custom dead-time implementation via external timing logic.
What thermal performance can be expected from LM5101ASD/NOPB in SO PowerPAD-8 package?
LM5101ASD/NOPB in SO PowerPAD-8 achieves RθJA = 40°C/W on a standard 4-layer PCB with thermal vias under the exposed pad. At 3-A peak drive and 50% duty cycle, junction temperature rise remains within 40°C - well below the 125°C maximum operating limit, ensuring long-term reliability in industrial environments.
LM5101ASD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WDFN Exposed Pad
- 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:
- 10-WSON (4x4)
LM5101ASD/NOPB FAQ
1.How can I place an order for LM5101ASD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5101ASD/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 LM5101ASD/NOPB reliable?
The price and inventory of LM5101ASD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5101ASD/NOPB is usually 5 days.
3.What payment methods are accepted for LM5101ASD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5101ASD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5101ASD/NOPB?
LM5101ASD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5101ASD/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 LM5101ASD/NOPB?
For technical support, including LM5101ASD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5101ASD/NOPB requirements.
6.How does Aetrix verify that LM5101ASD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5101ASD/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 LM5101ASD/NOPB meets industry standards.
7.What is the process for return or replacement of LM5101ASD/NOPB?
All LM5101ASD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5101ASD/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 LM5101ASD/NOPB part is unused and in its original packaging.
Return procedure for LM5101ASD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5101ASD/NOPB Tags
-
ZXGD3009E6TA
Diodes Incorporated
-
1EDN7512BXTSA1
Infineon Technologies
-
UCC27517DBVR
Texas Instruments
-
MCP1416T-E/OT
Microchip Technology
-
MCP1402T-E/OT
Microchip Technology
-
MCP1415T-E/OT
Microchip Technology
-
MCP1401T-E/OT
Microchip Technology
-
IX4428NTR
Littelfuse Inc.
-
IRS2005STRPBF
Infineon Technologies
-
IRS2008STRPBF
Infineon Technologies
-
IX4310TTR
Littelfuse Inc.
-
2EDN7524RXTMA1
Infineon Technologies
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
