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Texas Instruments LM27222SD/NOPB
- Part No.:
- LM27222SD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM27222SD/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,412
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Product details
Overview
LM27222SD/NOPB from Texas Instruments is a dual N-channel MOSFET driver IC designed for synchronous buck regulator gate drive, featuring 4.5A peak sink/source current, 10ns adaptive dead time, 8ns propagation delay, and operation from 4V to 6.85V VCC - enabling high-frequency DC/DC conversion in CPU/GPU core voltage regulators.
For engineers reviewing the LM27222SD/NOPB datasheet, LM27222SD/NOPB pinout, LM27222SD/NOPB application, or LM27222SD/NOPB equivalent, key selection criteria include bootstrap-capable high-side drive, MOSFET-tolerant gate drive strength, adaptive shoot-through protection, minimum 30ns on-time capability, and WSON-8 thermal performance (θJA = 39°C/W).
Technical Context
The LM27222SD/NOPB implements adaptive shoot-through protection that dynamically enforces 10ns minimum dead time by monitoring LG voltage (for HG turn-on) and HG–SW differential (for LG turn-on), ensuring robust timing across temperature and load. Its logic-level inputs (IN, LEN) feature internal 150kΩ pull-downs and 30%/65% VCC hysteresis thresholds.
Each driver channel delivers 4.5A peak sink current with 0.4Ω pull-down RDS(on) and 0.9Ω pull-up RDS(on), supporting fast switching into 3.3nF loads (12–17ns rise/fall times). The SW pin serves as high-side return and tolerates −2V to 36V, enabling pre-biased startup in buck topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4V to 6.85V - powers logic and drivers; supports 5V rail sharing with controller |
| Peak Output Current | 4.5A sink / 3A source per channel - drives high-QG MOSFETs at multi-MHz frequencies |
| Dead Time | 10ns adaptive - minimizes body-diode conduction loss without fixed timing overhead |
| Propagation Delay | 8ns - enables precise PWM edge alignment for tight regulation in fast-transient supplies |
| Min On-time | 30ns - supports >2MHz operation at low duty cycles (e.g., 12V→1V conversion) |
| Quiescent Current | 5µA (IN/LEN low) - enables ultra-low-power states in notebook CPU VRMs |
| Package Thermal θJA | 39°C/W (WSON-8) - 7.7× lower than SOIC-8 variant, critical for high-density power stages |
Pinout & Package
LM27222SD/NOPB uses the WSON-8 (NGT0008A) package: 4mm × 4mm, 0.8mm max height, exposed thermal pad requiring PCB soldering for thermal and mechanical integrity. Pin 1 index located at top-left corner (Q1 quadrant in tape).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | High-side driver return | Common node between high/low MOSFETs; handles −2V to 36V swing; enables pre-bias startup |
| 2 HG | High-side gate drive output | Drives high-side MOSFET gate; internally pulled down to SW via 10kΩ to prevent spurious turn-on |
| 3 CB | Bootstrap supply input | Accepts bootstrap voltage up to 33V; powers high-side driver during HS conduction |
| 4 IN | PWM input (active-high) | Accepts controller PWM; internal 150kΩ pull-down ensures safe default state when floating |
| 5 LEN | Low-side enable (active-high) | Enables/disables LG output; internal 150kΩ pull-down prevents unintended LS conduction |
| 6 VCC | Logic and driver supply | 4V–6.85V input; powers internal logic, level shifter, and gate drivers |
| 7 LG | Low-side gate drive output | Drives low-side MOSFET gate; internally pulled down to GND via 10kΩ |
| 8 GND | Power and signal ground | Reference for VCC, IN, LEN, LG; must be low-impedance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive shoot-through protection | Eliminates fixed dead-time tuning; guarantees 10ns minimum separation while minimizing body-diode losses |
| MOSFET-tolerant drive strength | 0.4Ω pull-down / 0.9Ω pull-up RDS(on) ensures consistent timing across wide VGS and temperature ranges |
| Synchronous/non-synchronous/diode emulation mode | Controlled via LEN pin - enables efficiency optimization across light-load, heavy-load, and transient conditions |
| Pre-biased output startup support | Handles SW node voltages >3V at power-up; avoids latch-up or undefined states in systems with powered outputs |
| Ultra-low quiescent current | 5µA draw when IN and LEN are low - extends battery life in portable CPU/GPU VRMs |
Applications
| CPU Core Voltage Regulation | GPU Power Delivery |
|---|---|
Use Scenario: High-current, fast-transient 12V-to-1V buck converter supplying modern x86 processors with dynamic DVFS. IC Role / Device Role / Timing Role: Dual gate driver translating controller PWM into precisely timed, shoot-through-protected HG/LG signals for paralleled N-channel MOSFETs. Use Value: 30ns minimum on-time and 8ns propagation delay enable >1.5MHz operation with sub-100ns transient response, meeting Intel VR14/VR15 specifications. |
Use Scenario: Multi-phase 48V-to-0.8V VRM for discrete graphics cards with aggressive load-step requirements. IC Role / Device Role / Timing Role: High-speed gate driver delivering 4.5A peak current to low-RDS(on) trench MOSFETs in interleaved buck stages. Use Value: Adaptive dead time and 39°C/W WSON thermal resistance sustain >40A per phase at 92% efficiency without thermal throttling. |
| Fast-Transient DC/DC Supplies | Single-Ended Forward Rectification |
Use Scenario: Point-of-load converter in telecom baseband units requiring <500ns load-step recovery under 20A/µs slew rate. IC Role / Device Role / Timing Role: Synchronous buck driver enabling zero-voltage switching transitions via precise dead-time control and fast gate drive. Use Value: 10ns adaptive dead time and 4.5A sink current reduce body-diode conduction loss by >15% versus fixed-delay drivers at 500kHz–2MHz. |
Use Scenario: Secondary-side synchronous rectifier in isolated forward converters for server PSUs. IC Role / Device Role / Timing Role: Gate driver controlling low-side MOSFET in active clamp or synchronous rectifier configuration. Use Value: Bootstrap-compatible CB pin and −2V to 36V SW rating allow direct integration into high-side referenced rectifier topologies without level-shifting circuitry. |
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 |
|---|---|---|---|
| LM5113SD/NOPB | Higher VCC range (5–14V), 7A peak current, integrated bootstrap diode; no LEN pin for diode emulation mode | Better suited for higher-input-voltage industrial buck converters (>12V); lacks light-load diode emulation | Select when driving high-VGS MOSFETs from 12V rails or requiring integrated bootstrap diode; avoid if LEN-controlled mode switching is required |
| UCC27201D | SOIC-8 only; 4A peak current; fixed 12ns dead time; no adaptive protection or LEN pin | Lower cost for non-critical consumer applications; less robust against MOSFET parameter variation | Choose for cost-sensitive designs where adaptive dead time and diode emulation are unnecessary; verify fixed dead time sufficiency with target MOSFETs |
Compared with LM5113SD/NOPB and UCC27201D, LM27222SD/NOPB uniquely balances ultra-low quiescent current (5µA), adaptive dead time (10ns), and flexible LEN-controlled operation - making it optimal for high-efficiency, fast-transient CPU/GPU VRMs where thermal density and light-load behavior are critical.
Availability
LM27222SD/NOPB is available at Aetrix Electronics and suitable for CPU core voltage regulation, GPU power delivery, fast-transient DC/DC supplies, and single-ended forward rectification requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM27222SD/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, embedded processing, and power management technologies, with over 90 years of innovation in high-reliability analog IC design.
The LM27222SD/NOPB belongs to TI's high-speed power driver product line, engineered specifically for synchronous buck regulators in computing and communications infrastructure where precision timing, thermal efficiency, and robustness under pre-bias conditions are essential.
FAQ
What is the maximum bootstrap voltage (CB) rating for LM27222SD/NOPB?
The LM27222SD/NOPB supports a maximum CB voltage of 33V relative to GND, with absolute maximum CB-to-SW rating of 7V. This allows reliable operation in 24V-input buck converters where bootstrap voltage exceeds 12V, provided CB-to-SW remains within specification. Exceeding 33V on CB risks permanent damage to the internal level shifter.
Does LM27222SD/NOPB support pre-biased output startup?
Yes, LM27222SD/NOPB supports pre-biased output startup. Its SW pin tolerates −2V to 36V, and adaptive shoot-through protection holds LG low for ~170ns at power-up if CB–SW is insufficient (<2V), preventing shoot-through during bootstrap capacitor charging. This enables safe operation in systems with powered outputs prior to driver activation.
How does the LEN pin function in LM27222SD/NOPB?
The LEN pin on LM27222SD/NOPB enables three operating modes: when LEN = high, LG is active for synchronous rectification; when LEN = low, LG is disabled, forcing diode emulation; and when LEN is toggled, it supports non-synchronous operation. This provides dynamic efficiency optimization across load conditions without changing external components.
What is the thermal performance difference between LM27222SD/NOPB and SOIC-8 variants?
LM27222SD/NOPB in WSON-8 achieves θJA = 39°C/W, compared to 172°C/W for SOIC-8 (LM27222M/NOPB). This 4.4× improvement results from the exposed thermal pad and smaller footprint, allowing >3× higher continuous power dissipation at the same ambient temperature - critical for compact, high-current VRMs.
Can LM27222SD/NOPB drive both high- and low-side N-channel MOSFETs in a half-bridge?
Yes, LM27222SD/NOPB is explicitly designed to drive both high-side and low-side N-channel MOSFETs in synchronous buck configurations. Its integrated level shifter powers the high-side driver from the bootstrap capacitor (CB), while the low-side driver (LG) references GND - eliminating need for external high-side drivers or P-channel devices.
LM27222SD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- 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-WSON (4x4)
LM27222SD/NOPB FAQ
1.How can I place an order for LM27222SD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM27222SD/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 LM27222SD/NOPB reliable?
The price and inventory of LM27222SD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM27222SD/NOPB is usually 5 days.
3.What payment methods are accepted for LM27222SD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM27222SD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM27222SD/NOPB?
LM27222SD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM27222SD/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 LM27222SD/NOPB?
For technical support, including LM27222SD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM27222SD/NOPB requirements.
6.How does Aetrix verify that LM27222SD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM27222SD/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 LM27222SD/NOPB meets industry standards.
7.What is the process for return or replacement of LM27222SD/NOPB?
All LM27222SD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM27222SD/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 LM27222SD/NOPB part is unused and in its original packaging.
Return procedure for LM27222SD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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