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Texas Instruments LM27222MX/NOPB
- Part No.:
- LM27222MX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM27222MX/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,063
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Product details
Overview
LM27222MX/NOPB from Texas Instruments is a dual N-channel MOSFET driver IC designed for synchronous buck regulator power stages, delivering 4.5A peak sink and 3A peak source current per channel, 8ns propagation delay, 10ns adaptive dead time, and operation from 4V to 6.85V VCC - enabling high-frequency DC/DC conversion in CPU/GPU core voltage regulators.
For engineers reviewing the LM27222MX/NOPB datasheet, LM27222MX/NOPB pinout, LM27222MX/NOPB application, or LM27222MX/NOPB equivalent, key selection criteria include bootstrap-capable high-side drive, MOSFET-tolerant gate drive strength, adaptive shoot-through protection, and SOIC-8 thermal performance (θJA = 172°C/W) for high-current buck converters.
Technical Context
The LM27222MX/NOPB implements adaptive shoot-through protection that dynamically enforces ≥10ns dead time by monitoring LG voltage (for HG turn-on) and HG–SW differential voltage (for LG turn-on), eliminating fixed timing margins. Its logic-level inputs (IN, LEN) feature internal 150kΩ pull-downs and 30%–65% VCC hysteresis thresholds for noise immunity.
Each driver channel integrates matched 0.4Ω pull-down and 0.9Ω pull-up RDS(on) with 30ns minimum output pulse width, supporting up to 2MHz switching in buck topologies. The SW pin serves as high-side return and tolerates −2V to +36V relative to GND, accommodating pre-biased outputs and boost configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4V to 6.85V - powers logic and gate drivers; supports 5V controller rails with ±5% tolerance. |
| Peak Sink Current | 4.5A per channel - ensures fast MOSFET turn-off under heavy capacitive loads (e.g., paralleled FETs). |
| Propagation Delay | 8ns - minimizes timing skew between IN input and HG/LG outputs for precise PWM edge alignment. |
| Adaptive Dead Time | 10ns minimum - reduces body-diode conduction loss without fixed timing overhead or layout dependency. |
| Min Output Pulse Width | 30ns - enables >1MHz operation at low duty cycles (e.g., 12V→1V conversion) without pulse dropout. |
| Quiescent Current | 5µA (IN/LEN low) - maintains ultra-low standby power in notebook CPU VRMs during deep-sleep states. |
| Package Thermal Resistance | θJA = 172°C/W (SOIC-8) - defines maximum power dissipation (720mW) at 25°C ambient for thermal design. |
Pinout & Package
LM27222MX/NOPB is housed in an 8-pin SOIC package (D0008A, 3.9mm × 4.9mm, 1.75mm max height) with exposed pad not present; thermal performance relies on PCB copper area and trace routing per TI SLUA271 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | High-side driver return | Common node connection point for high/low-side MOSFET sources; referenced for HG output and withstands −2V to +36V transients. |
| 2 HG | High-side gate drive output | Drives high-side N-MOSFET gate; internally pulled down to SW via 10kΩ resistor to prevent spurious turn-on. |
| 3 CB | Bootstrap supply input | Accepts charged bootstrap capacitor (CB–SW ≥2V) to power high-side driver; rated for 33V max CB-to-GND. |
| 4 IN | PWM input (active-high) | Accepts controller PWM signal; internal 150kΩ pull-down ensures safe default state when controller is inactive. |
| 5 LEN | Low-side enable (active-high) | Enables/disables LG output; internal 150kΩ pull-down prevents unintended low-side conduction during startup. |
| 6 VCC | Driver power supply | Supplies logic and gate drivers; must be stable 4–6.85V; decoupling capacitor required adjacent to pin. |
| 7 LG | Low-side gate drive output | Drives low-side N-MOSFET gate; internally pulled down to GND via 10kΩ resistor for fail-safe off-state. |
| 8 GND | Power ground reference | Return path for VCC, LG, and internal circuitry; requires low-inductance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive shoot-through protection | Eliminates fixed dead-time tuning by sensing LG voltage and HG–SW differential, reducing conduction loss while guaranteeing safe FET switching sequence. |
| MOSFET-tolerant drive strength | 0.4Ω pull-down / 0.9Ω pull-up RDS(on) delivers consistent 4.5A sink / 3A source into varied gate charges without external buffering. |
| Ultra-low quiescent current | 5µA operating current with IN and LEN low enables compliance with ACPI S3/S4 sleep states in portable systems. |
| Robust input threshold hysteresis | 30%–65% VCC logic thresholds with 0.7V hysteresis reject noise on IN/LEN lines in electrically noisy DC/DC environments. |
| Pre-bias start-up support | Handles powered-up output rails up to 30V; adaptive protection holds LG low for ~170ns if CB–SW <2V, enabling reliable cold-start into pre-charged loads. |
Applications
| CPU Core Voltage Regulation | GPU Power Delivery |
|---|---|
|
Use Scenario: High-current, fast-transient regulation for modern x86 or ARM processors requiring 0.5V–1.5V output at up to 100A with sub-100ns load-step response. IC Role / Device Role / Timing Role: Dual gate driver translating controller PWM into precisely timed HG/LG signals with adaptive dead time to minimize body-diode losses in multiphase buck stages. Use Value: 30ns minimum on-time and 8ns propagation delay enable >1MHz switching, shrinking output inductors and improving transient recovery without sacrificing efficiency. |
Use Scenario: Multi-phase VRM for discrete or integrated GPUs where thermal density and dynamic voltage scaling demand high-efficiency, low-noise power conversion. IC Role / Device Role / Timing Role: Synchronous buck driver managing parallel high-side/low-side MOSFET pairs per phase, with LEN pin enabling diode-emulation mode during light-load conditions. Use Value: 4.5A peak sink current ensures rapid turn-off of large gate-charge FETs (e.g., Si7390DP), reducing switching loss and junction temperature rise under burst-mode operation. |
| Fast-Transient DC/DC Supplies | Single-Ended Forward Rectification |
|
Use Scenario: Point-of-load (POL) converters in telecom or server boards needing <500ns load-step response and <1% output deviation across 0–100% load steps. IC Role / Device Role / Timing Role: High-speed gate driver providing deterministic 30ns minimum pulse width and <10ns dead time to maintain regulation fidelity at 2MHz+ switching frequencies. Use Value: Adaptive shoot-through protection eliminates timing-margin uncertainty, allowing designers to maximize frequency without risking cross-conduction in high-dV/dt environments. |
Use Scenario: Isolated forward converter secondary-side synchronous rectification using N-MOSFETs instead of Schottky diodes to improve efficiency at 12V–48V input ranges. IC Role / Device Role / Timing Role: Gate driver controlling low-side synchronous rectifier FETs referenced to SW node, leveraging CB bootstrap for high-side drive in non-buck topologies. Use Value: SW pin rating of −2V to +36V and CB tolerance up to 33V allow direct use in forward converters with variable output voltages and reverse-recovery stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual N-channel MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5106MM/NOPB | Higher VCC range (5–14V), integrated bootstrap diode, 1.2A peak current, no LEN pin. | Lacks diode-emulation mode; suited for fixed-frequency, medium-current buck designs without light-load optimization. | Select when bootstrap diode integration simplifies layout and 1.2A drive suffices for smaller FETs. |
| UCC27201ADR | 4A peak current, 12ns propagation delay, 5V–16V VCC, no adaptive dead time (fixed 150ns). | Fixed dead time increases body-diode conduction loss; better suited for lower-frequency, higher-voltage industrial buck converters. | Choose for cost-sensitive 12V–48V industrial supplies where adaptive timing is non-critical and layout simplicity is prioritized. |
Compared with LM5106MM/NOPB and UCC27201ADR, the LM27222MX/NOPB uniquely combines adaptive dead-time control, 4.5A sink capability, and 5µA quiescent current - making it optimal for high-efficiency, high-frequency, low-voltage CPU/GPU VRMs where thermal and transient performance are critical.
Availability
LM27222MX/NOPB is available at Aetrix Electronics and suitable for CPU core voltage regulation, GPU power delivery, and fast-transient DC/DC power supplies requiring stable component supply, full production traceability, and long-term lifecycle support.
Supply support for LM27222MX/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 LM27222MX/NOPB belongs to TI's high-speed power driver product line, engineered specifically for synchronous buck converters in computing and communications infrastructure where precision timing, shoot-through immunity, and thermal efficiency are mandatory.
FAQ
What is the maximum allowable CB-to-GND voltage for LM27222MX/NOPB?
The absolute maximum CB-to-GND voltage for LM27222MX/NOPB is 36V, with a recommended operating limit of 33V. This rating allows safe use in buck converters with up to 30V input and accounts for bootstrap voltage overshoot during switching transitions. Exceeding 33V in continuous operation risks accelerated degradation per TI's SNVS306B specification.
Does LM27222MX/NOPB support diode emulation mode, and how is it enabled?
Yes, LM27222MX/NOPB supports diode emulation mode via the LEN pin. When LEN is held low, the LG output is disabled, forcing the low-side MOSFET off and allowing the high-side FET body diode to conduct - useful for light-load efficiency improvement. This behavior is explicitly documented in the Applications section of the LM27222MX/NOPB datasheet.
What is the thermal resistance θJA for LM27222MX/NOPB, and how does it impact power dissipation?
LM27222MX/NOPB in SOIC-8 package has θJA = 172°C/W. At 25°C ambient, this limits maximum allowable power dissipation to 720mW before reaching the 150°C junction limit. Designers must ensure adequate PCB copper area and minimize trace length to SW/GND to maintain this thermal performance in high-current applications.
Can LM27222MX/NOPB drive both high-side and low-side N-MOSFETs in a synchronous buck converter?
Yes, LM27222MX/NOPB is specifically designed to drive both high-side and low-side N-channel MOSFETs in synchronous buck topologies. Its bootstrap architecture (CB pin) powers the high-side driver, while LG directly drives the low-side FET referenced to GND - confirmed by TI's typical application circuit and pin-function descriptions in SNVS306B.
What is the minimum input pulse width at the IN pin that guarantees correct HG-SW output timing?
The LM27222MX/NOPB guarantees correct HG-SW output timing for IN pulses ≥60ns wide. For narrower pulses (down to 20ns), the HG-SW output remains fixed at 30ns minimum width - a hard limit defined by internal timing circuitry and verified in Figure 5 of the LM27222MX/NOPB datasheet.
LM27222MX/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:
- Synchronous
- Number of Drivers:
- 2
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 4V ~ 6.85V
- Logic Voltage - VIL, VIH:
- -
- Current - Peak Output (Source, Sink):
- 3A, 4.5A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- 33 V
- Rise / Fall Time (Typ):
- 17ns, 12ns
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM27222MX/NOPB FAQ
1.How can I place an order for LM27222MX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM27222MX/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 LM27222MX/NOPB reliable?
The price and inventory of LM27222MX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM27222MX/NOPB is usually 5 days.
3.What payment methods are accepted for LM27222MX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM27222MX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM27222MX/NOPB?
LM27222MX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM27222MX/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 LM27222MX/NOPB?
For technical support, including LM27222MX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM27222MX/NOPB requirements.
6.How does Aetrix verify that LM27222MX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM27222MX/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 LM27222MX/NOPB meets industry standards.
7.What is the process for return or replacement of LM27222MX/NOPB?
All LM27222MX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM27222MX/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 LM27222MX/NOPB part is unused and in its original packaging.
Return procedure for LM27222MX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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