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Texas Instruments LM27222M/NOPB
- Part No.:
- LM27222M/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM27222M/NOPB.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:391
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Product details
Overview
LM27222M/NOPB from Texas Instruments is a dual N-channel synchronous MOSFET driver for high-frequency buck regulators, delivering 4.5A peak sink current, 10ns adaptive dead time, and 8ns propagation delay. It drives high- and low-side MOSFETs in push-pull configurations with adaptive shoot-through protection and supports diode emulation via the LEN pin - used in CPU/GPU core voltage regulation and fast-transient DC/DC supplies.
For engineers reviewing the LM27222M/NOPB datasheet, LM27222M/NOPB pinout, LM27222M/NOPB application, or LM27222M/NOPB equivalent, key selection criteria include bootstrap-capable high-side drive (CB pin), SW-node referenced return path, 4V–6.85V VCC operating range, SOIC-8 thermal performance (θJA = 165°C/W), and compatibility with sub-30ns minimum on-time designs.
Technical Context
The LM27222M/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). Its logic-level shifter and internal 10kΩ pull-downs on HG and LG ensure deterministic state transitions without latches.
It operates in buck topologies with up to 30V input, accepts PWM inputs (IN) and gate-enable control (LEN), and uses CB–SW bootstrap charging to sustain high-side drive. The SOIC-8 package provides accessible pinout for layout-critical gate-drive loop minimization and thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Sink Current | 4.5A per driver - enables fast turn-off of large-gate-charge MOSFETs in high-current (>20A) buck stages. |
| Propagation Delay | 8ns - ensures tight timing alignment between controller PWM and power-stage switching, critical for >1MHz operation. |
| Adaptive Dead Time | 10ns - minimizes body-diode conduction loss while preventing shoot-through under varying load and temperature conditions. |
| Minimum Output Pulse Width | 30ns - supports high-frequency (up to 2MHz) operation at low duty cycles, e.g., 5V→0.8V conversion with 4% duty. |
| VCC Operating Range | 4V to 6.85V - matches standard 5V controller rails and allows direct tie to 5V system supply without LDO. |
| Quiescent Current | 5µA (IN/LEN low) - enables ultra-low-power states in notebook CPU VRMs during deep sleep modes. |
| High-Side RDS(on) | 0.9Ω pull-up / 0.4Ω pull-down - delivers strong gate drive strength with low conduction loss during active switching. |
Pinout & Package
LM27222M/NOPB is housed in an SOIC-8 (D0008A) package with exposed pad not present; θJA = 165°C/W. Pin 1 (SW) serves as high-side driver return and must connect directly to the MOSFET common node; pin 3 (CB) supplies bootstrap voltage to the high-side driver; pin 6 (VCC) powers both drivers and logic from 4–6.85V.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | High-side driver return | Reference node for HG output; connects to source of high-side MOSFET and drain of low-side MOSFET - must be low-inductance path. |
| 2 HG | High-side gate drive output | Drives gate of N-channel high-side MOSFET; internally pulled down to SW via 10kΩ resistor when inactive. |
| 3 CB | Bootstrap capacitor connection | Provides floating supply for high-side driver; requires external 0.33µF ceramic capacitor between CB and SW. |
| 4 IN | PWM input (active-high) | Accepts controller PWM signal; internally pulled down to GND via 150kΩ resistor to prevent spurious turn-on. |
| 5 LEN | Low-side enable (active-high) | Enables/disables low-side driver; supports synchronous, non-synchronous, and diode-emulation modes. |
| 6 VCC | Driver power supply | Supplies both drivers and internal logic; decoupling capacitor required between VCC and GND near the pin. |
| 7 LG | Low-side gate drive output | Drives gate of N-channel low-side MOSFET; internally pulled down to GND via 10kΩ resistor when inactive. |
| 8 GND | Ground reference | Logic and power ground; must be low-impedance connection to PCB ground plane, separate from power ground if needed. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive shoot-through protection | Prevents simultaneous conduction of high- and low-side MOSFETs by sensing LG voltage and HG–SW differential - eliminates need for fixed dead-time tuning. |
| Sub-10ns dead time | Reduces low-side body-diode conduction time in buck converters, improving efficiency at light loads and high frequencies. |
| MOSFET-tolerant drive strength | 0.4Ω pull-down / 0.9Ω pull-up RDS(on) ensures robust gate driving across wide gate-charge ranges (QG = 10–100nC). |
| Diode emulation mode | Controlled via LEN pin - disables low-side driver during light-load discontinuous conduction mode (DCM), reducing reverse recovery losses. |
| Zero-duty-cycle support | Outputs remain in known states even with zero-width IN pulses; no latch-based logic prevents "stuck" outputs during startup or fault recovery. |
Applications
| CPU Core Voltage Regulation | GPU Power Delivery |
|---|---|
Use Scenario: High-current, fast-transient 0.8V/60A VRM for modern x86 processors requiring <100ns load-step response. IC Role / Device Role / Timing Role: Dual gate driver translating controller PWM into precisely timed, shoot-through-protected HG/LG signals for paralleled high- and low-side MOSFETs. Use Value: 30ns minimum on-time and 8ns propagation delay enable stable 1–2MHz operation at 1.25% duty cycle (5V→0.0625V), supporting aggressive dynamic voltage scaling. |
Use Scenario: Multi-phase buck converter powering discrete GPU with 0.9–1.2V output, handling >100A peak current and >10A/ns slew rates. IC Role / Device Role / Timing Role: Synchronous MOSFET driver providing adaptive dead time and 4.5A sink capability to drive low-RDS(on) trench MOSFETs in compact layout. Use Value: 10ns adaptive dead time reduces body-diode conduction loss by >15% at light loads, extending battery life in mobile workstations. |
| Fast-Transient DC/DC Supplies | High-Current Buck Converters |
Use Scenario: Point-of-load regulator in telecom baseband cards requiring <500ns transient recovery from 0→30A load step. IC Role / Device Role / Timing Role: Gate driver enabling high-frequency (1.5MHz) operation with minimal propagation skew between phases in interleaved designs. Use Value: 5µA quiescent current and LEN-controlled diode emulation maintain >90% efficiency down to 1mA load, meeting Energy Star standby requirements. |
Use Scenario: 12V→3.3V/40A industrial power module with forced-air cooling and strict thermal budget (<85°C case temp). IC Role / Device Role / Timing Role: Robust gate driver with SOIC-8 package (θJA = 165°C/W) delivering 4.5A peak current without external boost circuitry. Use Value: Bootstrap architecture eliminates need for isolated bias supply, reducing BOM count and board area by >25% vs. transformer-coupled drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5106MM/NOPB | Higher VCC max (14V), integrated bootstrap diode, 2A peak drive - lower current capability than LM27222M/NOPB's 4.5A sink. | Targeted at mid-power buck converters (<15A); lacks adaptive dead time - uses fixed 500ns dead time. | Select when bootstrap diode integration simplifies layout and 2A drive suffices; avoid for >20A or <500kHz designs requiring minimal dead time. |
| UCC27201ADR | SOIC-8, 4A sink/4A source, 12ns propagation, no adaptive dead time - relies on external timing or controller coordination. | Used in half-bridge motor drives and isolated DC/DC; no LEN pin or diode-emulation mode. | Choose for cost-sensitive industrial motor control where adaptive protection is managed externally; not recommended for CPU VRMs needing sub-20ns dead time. |
Compared with LM5106MM/NOPB and UCC27201ADR, the LM27222M/NOPB uniquely combines 4.5A sink strength, adaptive 10ns dead time, and LEN-enabled diode emulation - making it optimal for high-efficiency, high-frequency, high-current buck regulators where timing precision and light-load optimization are critical.
Availability
LM27222M/NOPB is available at Aetrix Electronics and suitable for CPU core voltage regulation, GPU power delivery, and fast-transient DC/DC supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC-8 packaging.
Supply support for LM27222M/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 ICs, with decades of expertise in high-performance power delivery solutions.
The LM27222M/NOPB belongs to TI's high-speed power driver product line, engineered specifically for synchronous buck converters in computing, graphics, and telecom infrastructure demanding nanosecond-level timing accuracy and robust shoot-through immunity.
FAQ
What is the maximum input voltage rating for the CB pin on the LM27222M/NOPB?
The CB pin of the LM27222M/NOPB has an absolute maximum rating of 36V relative to GND and 7V relative to SW. Per the datasheet, the recommended operating maximum is 33V. Exceeding these limits risks permanent damage to the high-side level shifter. Always verify bootstrap capacitor voltage rating and layout parasitics to avoid overshoot during switching transitions in the LM27222M/NOPB application.
Does the LM27222M/NOPB require an external bootstrap diode?
No, the LM27222M/NOPB does not require an external bootstrap diode. Its internal architecture uses a charge-pump-like bootstrap circuit that charges the external CB–SW capacitor during low-side conduction. The datasheet specifies a 0.33µF ceramic capacitor between CB and SW - no diode is needed or recommended. Adding one may disrupt the adaptive timing behavior of the LM27222M/NOPB.
How does the LEN pin affect operation of the LM27222M/NOPB in light-load conditions?
When LEN is held low, the LM27222M/NOPB disables the low-side driver (LG), forcing diode emulation mode - allowing the low-side MOSFET body diode to conduct during freewheeling. This avoids reverse recovery losses in DCM operation. When LEN is high, full synchronous operation resumes. This feature is confirmed in the LM27222M/NOPB datasheet Figure 4 and Application Information section.
What is the thermal resistance (θJA) of the LM27222M/NOPB in its SOIC-8 package?
The LM27222M/NOPB in SOIC-8 (D0008A) package has a junction-to-ambient thermal resistance (θJA) of 165°C/W, as specified in the Absolute Maximum Ratings table footnote (3) of the official datasheet. This value assumes standard JEDEC 2-layer board conditions; actual performance improves with added copper pour and thermal vias beneath the package.
Can the LM27222M/NOPB drive both high- and low-side MOSFETs in a boost converter configuration?
No - the LM27222M/NOPB is designed exclusively for buck (step-down) topologies with high-side N-MOSFET and low-side N-MOSFET in a synchronous rectifier arrangement. Its SW pin is referenced to the switch node common to both FETs, and its adaptive shoot-through logic assumes buck-phase relationships. The datasheet explicitly lists "buck configuration" in Absolute Maximum Ratings and does not validate boost use. For boost, consider dedicated high-side drivers like LM5113.
LM27222M/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
LM27222M/NOPB FAQ
1.How can I place an order for LM27222M/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM27222M/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 LM27222M/NOPB reliable?
The price and inventory of LM27222M/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM27222M/NOPB is usually 5 days.
3.What payment methods are accepted for LM27222M/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM27222M/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM27222M/NOPB?
LM27222M/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM27222M/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 LM27222M/NOPB?
For technical support, including LM27222M/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM27222M/NOPB requirements.
6.How does Aetrix verify that LM27222M/NOPB is sourced from the original manufacturer or authorized distributors?
All LM27222M/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 LM27222M/NOPB meets industry standards.
7.What is the process for return or replacement of LM27222M/NOPB?
All LM27222M/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM27222M/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 LM27222M/NOPB part is unused and in its original packaging.
Return procedure for LM27222M/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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