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Texas Instruments LM27341QMY/NOPB
- Part No.:
- LM27341QMY/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM27341QMY/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.5A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,610
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Product details
Overview
LM27341QMY/NOPB from Texas Instruments is a monolithic, 2-MHz, peak current-mode PWM step-down DC-DC regulator in a 10-pin WSON package (3.0 mm × 3.0 mm), delivering up to 1.5-A output current with 1% internal reference accuracy, 150-mΩ NMOS switch RDS(ON), and 70-nA shutdown current. It operates across 3 V to 20 V input and supports 1 V to 18 V output, used in automotive-grade local power conversion for radio supplies and HDD core rails.
For engineers reviewing the LM27341QMY/NOPB datasheet, LM27341QMY/NOPB pinout, LM27341QMY/NOPB application, or LM27341QMY/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 65-ns minimum on-time enabling high-frequency operation, frequency synchronization range (1–2.35 MHz), thermal shutdown at 165°C, and internal compensation eliminating external loop components.
Technical Context
The LM27341QMY/NOPB implements constant-frequency, peak current-mode control with internal slope compensation and fixed 1-V feedback reference. Its architecture integrates a 150-mΩ NMOS power switch, bootstrap LDO (3.9 V), and cycle-by-cycle current limiting (2 A min) - all operating within a single 2-MHz oscillator core that supports external SYNC override.
It features frequency foldback (220–250 kHz under short-circuit), overvoltage protection (1.13 V FB threshold), undervoltage lockout (2.6–2.9 V with 0.3–0.6 V hysteresis), and soft-start (1 ms typical). The device uses internal compensation and requires no external compensation network, simplifying design while maintaining stability across wide load and line variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 20 V - supports direct connection to 12-V automotive and industrial rails without pre-regulation. |
| Output Current | Up to 1.5 A - sufficient for powering microcontrollers, FPGAs, and RF ICs in compact space-constrained designs. |
| Switching Frequency | 2 MHz (internal) or 1–2.35 MHz (SYNC-adjustable) - enables use of sub-2.2-µH inductors and low-ESR ceramic capacitors. |
| RDS(ON) | 150 mΩ (typical at 25°C) - minimizes conduction loss and thermal rise at full load in WSON package. |
| Feedback Accuracy | ±1% over –40°C to +125°C - ensures tight output regulation across automotive temperature range. |
| Shutdown Current | 70 nA - preserves battery life in always-on systems such as telematics and infotainment standby modes. |
| Minimum On-Time | 65 ns - supports high step-down ratios (e.g., 12 V → 1.2 V) at 2 MHz without pulse-skipping instability. |
Pinout & Package
LM27341QMY/NOPB is packaged in a thermally enhanced 10-pin WSON (DSC) with exposed thermal pad (DAP), measuring 3.0 mm × 3.0 mm × 0.8 mm. The DAP must be soldered to PCB ground plane for optimal thermal performance (RθJB = 22.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Power switch output | Connects directly to inductor and catch diode; carries high di/dt switching current - requires tight layout and Kelvin return path. |
| 3 BOOST | Bootstrap supply node | Drives NMOS gate via external capacitor; voltage = VSW + ~3.9 V - must maintain 3–5.5 V relative to SW for reliable high-side drive. |
| 4 EN | Enable control input | Logic-high (>1.8 V) enables regulation; logic-low (<0.4 V) enters ultra-low-power shutdown - must not float or exceed PVIN + 0.3 V. |
| 5 SYNC | Frequency sync input | Accepts external clock (1–2.35 MHz); grounding selects internal 2-MHz oscillator - enables EMI reduction and multi-rail synchronization. |
| 6 FB | Feedback sensing input | Monitors resistor divider output; regulates VOUT to 1.0 V reference - placement near GND (pin 7) critical for accuracy. |
| 7 GND | Signal and power ground | Primary ground reference for error amplifier and control circuitry - must be low-impedance and tied to DAP and PVIN bypass cap. |
| 8 AVIN | Analog supply input | Powers internal control circuitry (error amp, oscillator, logic); separate from power stage - improves noise immunity vs. PVIN. |
| 9, 10 PVIN | Power stage input | Supplies NMOS switch and boost LDO; requires local 4.7-µF ceramic bypass cap - decoupling critical for transient response. |
| DAP | Thermal & ground pad | Exposed copper pad on bottom - must be soldered to solid GND plane for thermal dissipation and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for –40°C to +125°C junction operation - validated for automotive infotainment, ADAS, and body electronics. |
| Internal compensation | Eliminates need for external Type II/III compensation network - reduces BOM count and layout sensitivity. |
| Frequency synchronization | Enables precise EMI management by locking multiple converters to common clock - prevents beat frequencies in multi-rail systems. |
| Integrated bootstrap LDO | Generates stable 3.9-V gate drive from SW node - removes need for external charge pump or bias supply. |
| Output overvoltage protection | Shuts down NMOS when FB exceeds 1.13 V - protects downstream loads (e.g., processors, sensors) from fault-induced damage. |
Applications
| Automotive Infotainment Power | USB-Powered Industrial Sensor Hub |
|---|---|
|
Use Scenario: Supplies 3.3-V rail for DSP, audio codec, and display controller in vehicle head unit with 12-V battery input. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated, low-noise, synchronized power with fast load transient response. Use Value: AEC-Q100 qualification ensures reliability under automotive thermal cycling; 2-MHz operation allows compact 1.5-µH inductor and 22-µF output capacitance. |
Use Scenario: Converts 5-V USB power to 1.8-V core voltage for ARM Cortex-M4 microcontroller and MEMS sensor array. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with enable-controlled sequencing and soft-start to prevent inrush into capacitive loads. Use Value: 70-nA shutdown current extends battery runtime in portable test equipment; internal 1% reference eliminates calibration overhead. |
| HDD Core Voltage Regulation | DSL Modem Line Card Supply |
|
Use Scenario: Generates 1.2-V VCORE for SATA hard disk drive controller ASIC from 12-V intermediate rail. IC Role / Device Role / Timing Role: High-current, high-frequency buck regulator with tight output tolerance and thermal shutdown. Use Value: 150-mΩ RDS(ON) and 65-ns minimum on-time support >90% efficiency at 1.2 V/1.2 A; thermal shutdown prevents damage during mechanical stall events. |
Use Scenario: Provides 3.3-V supply for ADSL2+ PHY and line driver ICs in residential gateway with 12-V wall adapter input. IC Role / Device Role / Timing Role: Synchronized buck converter sharing clock with other rails to suppress conducted EMI in narrowband telecom bands. Use Value: SYNC pin accepts 1.8-MHz external clock to avoid AM band interference; frequency foldback protects during line surge faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM27342QMY/NOPB | 2-A output capability, 2.5-A min current limit, same pinout and package | Higher current delivery required for FPGA I/O banks or dual-core SoCs | Select when >1.5-A continuous load or higher pulse current margin is needed; identical layout and control interface. |
| TPS54331DR | 3-A output, 3.5-A current limit, 500-kHz fixed frequency, SOIC-8 package | Lower switching frequency suits cost-sensitive industrial controls with larger magnetics | Choose for non-automotive applications where board area is less constrained and EMI filtering is simpler at lower fSW. |
Compared with LM27342QMY/NOPB, the LM27341QMY/NOPB offers lower quiescent current and tighter thermal footprint for 1.5-A loads, while TPS54331DR trades higher current and lower frequency for SOIC compatibility and reduced BOM cost - making LM27341QMY/NOPB optimal for space- and automotive-grade constrained designs.
Availability
LM27341QMY/NOPB is available at Aetrix Electronics and suitable for automotive infotainment systems, USB-powered sensor hubs, and DSL modem line cards requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for LM27341QMY/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 ICs, with leadership in automotive, industrial, and communications markets.
The LM2734x product line was designed specifically for high-density, high-frequency DC-DC conversion in automotive and industrial applications where small size, thermal robustness, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum recommended junction temperature for continuous operation of the LM27341QMY/NOPB?
The LM27341QMY/NOPB is rated for continuous operation up to +125°C junction temperature under Recommended Operating Conditions. Thermal shutdown activates at +165°C (typical) with 15°C hysteresis, but sustained operation above +125°C risks long-term reliability degradation. Layout with DAP-to-GND thermal vias and 2-oz copper planes is essential to maintain safe TJ in 1.5-A applications.
Can the LM27341QMY/NOPB operate with an input voltage below 3 V?
No - the LM27341QMY/NOPB has a specified minimum input voltage of 3 V per Recommended Operating Conditions. Below this, UVLO prevents startup, and internal circuits (e.g., boost LDO, error amplifier) may not function reliably. For sub-3-V inputs, consider TI's TPS6286x family or alternative buck regulators with 1.8-V minimum VIN.
Does the LM27341QMY/NOPB require an external bootstrap diode?
No - the LM27341QMY/NOPB integrates a bootstrap LDO and does not require an external diode under normal operation (VIN ≥ 5 V, duty cycle ≤ 75%). However, when VIN < 5 V and duty cycle > 75%, TI recommends adding an external Schottky diode from a 5-V rail to BOOST to ensure sufficient gate drive voltage - detailed in Section 7.3.2 of the datasheet.
How does frequency synchronization affect the minimum on-time limitation of the LM27341QMY/NOPB?
The LM27341QMY/NOPB has a fixed 65-ns minimum on-time. When synchronized to an external clock, the minimum achievable duty cycle is DMIN = 65 ns × fSYNC. At 2.35 MHz, DMIN ≈ 15.3%; below this, the device skips pulses and disables current limiting. Therefore, for high step-down ratios (e.g., 12 V → 1.2 V), fSYNC must be ≤ 1.54 MHz to maintain D ≥ 15.3% and ensure current-limit protection.
Is the LM27341QMY/NOPB pin-compatible with the LM27341QMMX/NOPB?
Yes - both LM27341QMY/NOPB (WSON-10) and LM27341QMMX/NOPB (MSOP-PowerPAD-10) share identical pin numbering, functions, and electrical specifications. They differ only in package: WSON (3 mm × 3 mm) vs. MSOP-PowerPAD (4.9 mm × 3.0 mm). Layouts are not interchangeable due to footprint mismatch, but schematic design and firmware integration are fully compatible.
LM27341QMY/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-PowerPad
LM27341QMY/NOPB FAQ
1.How can I place an order for LM27341QMY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM27341QMY/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 LM27341QMY/NOPB reliable?
The price and inventory of LM27341QMY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM27341QMY/NOPB is usually 5 days.
3.What payment methods are accepted for LM27341QMY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM27341QMY/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM27341QMY/NOPB?
LM27341QMY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM27341QMY/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 LM27341QMY/NOPB?
For technical support, including LM27341QMY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM27341QMY/NOPB requirements.
6.How does Aetrix verify that LM27341QMY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM27341QMY/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 LM27341QMY/NOPB meets industry standards.
7.What is the process for return or replacement of LM27341QMY/NOPB?
All LM27341QMY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM27341QMY/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 LM27341QMY/NOPB part is unused and in its original packaging.
Return procedure for LM27341QMY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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