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Texas Instruments LM27341MYX/NOPB
- Part No.:
- LM27341MYX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM27341MYX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.5A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,525
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Product details
Overview
LM27341MYX/NOPB from Texas Instruments is a monolithic, peak current-mode PWM step-down DC-DC regulator delivering up to 1.5 A output current with 150 mΩ internal NMOS switch, 2 MHz fixed switching frequency, and 1% feedback reference accuracy. It operates across 3 V to 20 V input and supports 1 V to 18 V output, targeting space-constrained local power conversion in automotive infotainment and USB-powered devices.
For engineers reviewing the LM27341MYX/NOPB datasheet, LM27341MYX/NOPB pinout, LM27341MYX/NOPB application, or LM27341MYX/NOPB equivalent, key selection considerations include its 65 ns minimum on-time for high-frequency operation, 70 nA shutdown current, frequency synchronization capability (1–2.35 MHz), thermal shutdown at 165°C, and WSON-10 package with exposed DAP for thermal management.
Technical Context
The LM27341MYX/NOPB implements constant-frequency, peak current-mode control with internal compensation and a dedicated AVIN supply for control circuitry separate from PVIN for the power stage. Its oscillator supports both internal 2 MHz operation and external synchronization via the SYNC pin, enabling EMI optimization and multi-converter phase alignment.
It features integrated bootstrap LDO (3.9 V output) for gate drive, cycle-by-cycle current limiting (2 A min), frequency foldback during overcurrent (down to 220 kHz), and output overvoltage protection triggered at 1.13 × VFB. The device uses a single feedback resistor divider referenced to its 1 V internal reference for precise output regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 20 V - supports wide-range industrial and automotive inputs without pre-regulation |
| Output Current Max | 1.5 A - sufficient for core logic rails in HDDs, set-top boxes, and radio subsystems |
| Switching Frequency | 2 MHz (internal), synchronizable 1–2.35 MHz - enables use of sub-2.2 µH inductors and compact ceramic capacitors |
| Feedback Reference | 1.00 V ±1% - ensures ±1% output voltage accuracy across temperature and line variations |
| Shutdown Current | 70 nA - minimizes battery drain in always-on USB or automotive standby modes |
| Min On-Time | 65 ns - allows stable operation at high VIN/VOUT ratios (e.g., 12 V → 1.2 V at ~10% duty cycle) |
| Thermal Shutdown | 165°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal design |
Pinout & Package
LM27341MYX/NOPB is packaged in a 3 mm × 3 mm, 10-pin WSON (DSC) package with an exposed thermal pad (DAP) that must be soldered to PCB ground for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Power switch output | Connects directly to inductor and catch diode; carries full switched current and requires low-inductance layout |
| 3 BOOST | Bootstrap capacitor node | Provides gate drive voltage (VBOOST – VSW) for internal NMOS; requires 0.1 µF ceramic capacitor to SW |
| 4 EN | Enable control input | Logic-high (>1.8 V) enables regulation; <0.4 V disables with 70 nA quiescent draw; must not float |
| 5 SYNC | Frequency sync input | Accepts external clock (1–2.35 MHz); grounding selects internal 2 MHz oscillator |
| 6 FB | Feedback input | Senses output via resistor divider; regulates VOUT = 1 V × (1 + R1/R2); high-impedance (20 nA bias) |
| 7 GND | Signal and power ground | Reference for FB divider and control circuitry; place bottom resistor adjacent to this pin |
| 8 AVIN | Analog supply input | Powers error amplifier, oscillator, and logic; bypass with 0.1 µF ceramic near pin |
| 9, 10 PVIN | Power stage supply input | High-current input for NMOS switch; requires bulk and ceramic bypassing at package |
| DAP | Thermal & ground pad | Exposed copper pad tied to GND; essential for thermal dissipation and noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Internal 150 mΩ NMOS switch | Enables 1.5-A output without external MOSFETs, reducing BOM count and board area |
| Peak current-mode control | Provides inherent cycle-by-cycle current limiting and fast transient response without external compensation |
| Integrated soft-start (1 ms) | Prevents inrush current and output overshoot during power-up, eliminating need for external timing components |
| Frequency foldback (220 kHz min) | Reduces power dissipation and prevents thermal runaway during short-circuit or overload conditions |
| Separate AVIN and PVIN supplies | Isolates noise-sensitive analog circuitry from high-current power switching, improving regulation stability |
Applications
| Automotive Infotainment Power | USB-Powered Peripheral Regulation |
|---|---|
Use Scenario: Supplies 3.3 V or 5 V to DSPs, audio codecs, and display controllers in head units with 12 V battery input. IC Role / Device Role / Timing Role: Primary buck regulator providing tightly regulated local power with EMI-controlled 2 MHz switching. Use Value: Eliminates need for external gate drivers or compensation networks while maintaining <1% output tolerance across –40°C to 125°C. | Use Scenario: Converts 5 V USB input to 1.8 V or 3.3 V for microcontrollers and sensors in portable accessories. IC Role / Device Role / Timing Role: Compact, self-contained step-down converter with ultra-low shutdown current for battery-backed operation. Use Value: 70 nA shutdown current extends battery life; 65 ns min on-time supports efficient 5 V → 1.2 V conversion. |
| HDD Core Voltage Supply | Set-Top Box Local DC-DC |
Use Scenario: Generates 1.2 V core voltage for HDD controller ICs from 12 V intermediate rail. IC Role / Device Role / Timing Role: High-frequency buck regulator enabling small 1.5 µH inductors and minimizing solution footprint on dense HDD PCBs. Use Value: 2 MHz operation reduces inductor size by >50% vs. 500 kHz alternatives, easing mechanical integration. | Use Scenario: Provides isolated 3.3 V and 1.8 V rails for SoC, memory, and tuners in consumer STB designs. IC Role / Device Role / Timing Role: Synchronized buck converter allowing multiple LM27341MYX/NOPB units to operate in-phase, suppressing beat frequencies. Use Value: SYNC pin enables clean, low-noise power delivery across multiple rails without EMI coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM27342MYX/NOPB | 2-A output capability, higher current limit (2.5 A min), same pinout and features | Preferred where load exceeds 1.5 A or higher overload margin is required | Select when future-proofing for higher current or designing across LM2734x family variants |
| TPS62130ARGTR | 3-V to 17-V input, 3-A output, 2.5-MHz sync-capable, but uses different compensation and lacks AVIN/PVIN separation | Better suited for higher-current, lower-input-voltage apps; less optimal for 12-V automotive inputs with strict thermal constraints | Choose for cost-sensitive, higher-current designs where AVIN/PVIN isolation is not critical |
Compared with LM27342MYX/NOPB, the LM27341MYX/NOPB offers identical functionality at reduced current rating-ideal for cost- and thermally constrained 1.5-A applications. Against TPS62130ARGTR, it provides superior thermal robustness via dual-supply architecture and tighter reference accuracy, albeit with lower max current.
Availability
LM27341MYX/NOPB is available at Aetrix Electronics and suitable for automotive infotainment systems, USB-powered peripherals, and HDD controller power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned manufacturing rigor.
Supply support for LM27341MYX/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 decades of expertise in high-reliability DC-DC conversion.
The LM2734x product line was designed specifically for compact, high-frequency, wide-input-voltage step-down regulation in automotive, industrial, and consumer electronics-emphasizing minimal external components, thermal resilience, and EMI-controllable operation.
FAQ
What is the maximum recommended output current for LM27341MYX/NOPB?
The LM27341MYX/NOPB is rated for a maximum continuous output current of 1.5 A under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). This is limited by its internal 150 mΩ NMOS switch and thermal characteristics; exceeding 1.5 A risks triggering current limit or thermal shutdown. Derating is required above 85°C ambient per the RθJA = 47.6°C/W specification.
Does LM27341MYX/NOPB require external compensation components?
No, the LM27341MYX/NOPB uses internal compensation and is fully functional with only external passive components: input/output capacitors, inductor, feedback resistors, and bootstrap capacitor. Its peak current-mode architecture and optimized loop response eliminate the need for external RC networks, simplifying design and reducing bill-of-materials cost.
Can LM27341MYX/NOPB operate with a 5-V input and 1.2-V output?
Yes, the LM27341MYX/NOPB supports this configuration: its 3–20 V input range and 65 ns minimum on-time enable stable 5 V → 1.2 V conversion at ~24% duty cycle. Ensure the inductor value (e.g., 1.0 µH) and output capacitance (≥44 µF) meet ripple and transient requirements per the datasheet's typical application curves.
How does the SYNC pin function on LM27341MYX/NOPB?
The SYNC pin on LM27341MYX/NOPB accepts an external clock signal between 1 MHz and 2.35 MHz to override the internal 2-MHz oscillator. A rising edge initiates each switching cycle. If the SYNC signal is lost, the device reverts to internal oscillation within 1.5 µs. Grounding SYNC selects fixed 2-MHz operation-critical for EMI-sensitive or multi-rail synchronized designs.
What thermal considerations apply to LM27341MYX/NOPB in the WSON package?
The LM27341MYX/NOPB in the 3 mm × 3 mm WSON package relies on its exposed DAP (thermal pad) soldered to a PCB ground plane for heat dissipation. With RθJA = 47.6°C/W, a 1-W power dissipation raises junction temperature by ~48°C above ambient. Layout must maximize copper area under DAP, use ≥4 thermal vias, and avoid splitting the ground plane beneath the IC to maintain low thermal resistance.
LM27341MYX/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:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-PowerPad
LM27341MYX/NOPB FAQ
1.How can I place an order for LM27341MYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM27341MYX/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 LM27341MYX/NOPB reliable?
The price and inventory of LM27341MYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM27341MYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM27341MYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM27341MYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM27341MYX/NOPB?
LM27341MYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM27341MYX/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 LM27341MYX/NOPB?
For technical support, including LM27341MYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM27341MYX/NOPB requirements.
6.How does Aetrix verify that LM27341MYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM27341MYX/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 LM27341MYX/NOPB meets industry standards.
7.What is the process for return or replacement of LM27341MYX/NOPB?
All LM27341MYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM27341MYX/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 LM27341MYX/NOPB part is unused and in its original packaging.
Return procedure for LM27341MYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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