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Texas Instruments LM25011Q1MY/NOPB
- Part No.:
- LM25011Q1MY/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM25011Q1MY/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,868
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Product details
Overview
LM25011Q1MY/NOPB from Texas Instruments is an automotive-grade 42-V, 2-A constant-on-time (COT) buck switching regulator with integrated N-channel MOSFET, adjustable current limit, and precision 2.51-V feedback reference. It operates from 6 V to 42 V input, delivers up to 2 A output current, and features power-good indication, thermal shutdown, and adjustable soft-start - used in front camera and infotainment power supplies.
For engineers reviewing the LM25011Q1MY/NOPB datasheet, LM25011Q1MY/NOPB pinout, LM25011Q1MY/NOPB application, or LM25011Q1MY/NOPB equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), COT topology enabling ceramic-capacitor stability without loop compensation, and valley-current-limit programmability for optimized inductor sizing.
Technical Context
The LM25011Q1MY/NOPB implements a constant-on-time control architecture where on-time is inversely proportional to VIN and set by RT resistor, yielding near-constant switching frequency across line and load variations. Its internal 2-A N-channel buck switch, gate driver with bootstrap capacitor interface (BST/SW), and valley-current sensing via CS/CSG terminals enable fast transient response and stable operation with low-ESR ceramic output capacitors.
It integrates a precision 2.51-V regulation comparator, power-good logic with 95% VREF threshold and hysteresis, and adjustable soft-start via external SS capacitor charged by 10-µA internal current source. The device supports current-limit foldback-free transition into constant-current mode and includes gate-drive UVLO, pre-charge circuitry, and minimum off-time enforcement (90 ns for LM25011 variant) to ensure bootstrap capacitor recharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 42 V - supports automotive battery rail with 45 V absolute max rating for load-dump tolerance. |
| Output Current | Up to 2 A continuous - determined by thermal design and external component selection; peak switch current rated at 3.5 A. |
| Feedback Reference | 2.51 V ±2% - sets regulated output voltage via RFB1/RFB2 divider; enables precise 3.3 V, 5 V, or custom bias rails. |
| Switching Frequency | Adjustable up to 2 MHz - set by RT resistor; remains stable across input and load due to COT architecture. |
| Current Limit Threshold | –130 mV at CS pin - defines valley current limit; allows inductor sizing based on actual load requirements. |
| Power Good Threshold | 95% of VREF (2.38 V typical) - PGD asserts high when FB reaches regulation; includes hysteresis for noise immunity. |
| Soft-Start Current | 10 µA - charges external SS capacitor linearly; controls ramp rate of output voltage during startup. |
| Thermal Shutdown | 155°C junction temperature - protects against sustained overload; includes 20°C hysteresis for clean recovery. |
Pinout & Package
LM25011Q1MY/NOPB is housed in a thermally enhanced 10-pin HVSSOP (DGQ) package measuring 3.00 mm × 3.00 mm with exposed pad for PCB ground connection and improved thermal dissipation (RθJA = 48°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Primary power input (6–42 V); requires local low-ESR capacitor to SGND for stability and EMI suppression. |
| RT | On-time programming | Resistor from VIN sets buck switch on-time and operating frequency; determines COT behavior. |
| PGD | Power-good indicator | Open-drain output signaling valid regulation; requires external pull-up ≤7 V for logic-level compatibility. |
| SS | Soft-start control | Capacitor-connected node charged by 10-µA current source; controls output voltage ramp rate. |
| SGND | Signal ground | Reference for internal analog circuitry; must be separated from power ground to minimize noise coupling. |
| FB | Feedback input | Connects to resistor divider; compares to 2.51-V internal reference to regulate VOUT. |
| CSG | Current-sense ground | Dedicated ground return for current-sense path; connects to RS and system ground to avoid sensing error. |
| CS | Current-sense input | Monitors voltage across external sense resistor RS during off-time to detect valley current limit. |
| SW | Switching node | Drives external inductor and freewheeling diode; connects to BST capacitor and internal N-FET source. |
| BST | Bootstrap supply | Connects to SW via 0.1-µF capacitor; supplies gate drive voltage for high-side N-FET during on-time. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C junction operation - meets automotive safety-critical power supply requirements. |
| Constant-on-time (COT) control | Eliminates need for external compensation network - simplifies design and ensures stability with ceramic output capacitors. |
| Integrated 2-A N-channel buck switch | Reduces BOM count and layout area - eliminates external high-side MOSFET and associated gate driver complexity. |
| Adjustable valley current limit | Enables optimization of inductor size and saturation margin - avoids overdesign while maintaining short-circuit protection. |
| Power-good (PGD) output | Provides system-level sequencing and fault monitoring - asserts when output reaches 95% of target, with built-in hysteresis. |
| Thermal shutdown with hysteresis | Prevents permanent damage under overload or poor heatsinking - auto-recovers only after junction cools by ≥20°C. |
Applications
| Automotive Front Camera | Infotainment System Core Rail |
|---|---|
Use Scenario: Powering 5-MP image sensor and ISP in ADAS front-facing camera module mounted behind windshield. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V bias regulator delivering clean, stable power with fast transient response to handle burst-mode imaging. Use Value: COT architecture maintains regulation during rapid load steps (e.g., LED flash activation), while PGD enables safe sensor initialization sequence. | Use Scenario: Generating core 1.2-V or 1.8-V supply for SoC in head-unit infotainment system with CAN/FlexRay connectivity. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting wide-input automotive battery range (6–16 V nominal, up to 42 V transients). Use Value: 42-V rating and AEC-Q100 qualification ensure reliability during cold-crank and load-dump events; soft-start prevents inrush into large SoC capacitance. |
| Telematics Control Unit (TCU) | Automotive Safety Domain Controller |
Use Scenario: Providing isolated 3.3-V auxiliary rail for LTE/GNSS modem and secure boot MCU in cellular-connected TCU. IC Role / Device Role / Timing Role: Secondary regulator fed from main 12-V bus; delivers low-noise, well-regulated power with minimal external components. Use Value: Integrated switch and COT control reduce solution footprint and EMI; thermal shutdown safeguards against enclosure overheating in sealed modules. | Use Scenario: Supplying redundant 5-V rail for ASIL-B safety monitor IC in zonal architecture domain controller. IC Role / Device Role / Timing Role: Fault-tolerant power stage with PGD reporting and current-limit visibility for functional safety diagnostics. Use Value: Valley current limit and PGD status support ISO 26262 diagnostic coverage; Grade 1 temp range matches safety processor requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011MY/NOPB | Commercial-grade version (non-AEC-Q100); identical electrical specs and pinout. | Lacks automotive qualification; unsuitable for safety-critical or temperature-extended environments. | Select LM25011MY/NOPB only for non-automotive industrial or test equipment use cases. |
| LM25011AQ1MY/NOPB | Features shorter minimum off-time (75 ns vs. 90 ns), enabling higher-frequency operation at low VIN. | Better suited for >1.5 MHz designs with 6–12 V input; requires external ripple injection on FB for stability. | Choose LM25011AQ1MY/NOPB when targeting >1.8 MHz switching with tight board space constraints. |
Compared with LM25011MY/NOPB, the LM25011Q1MY/NOPB adds automotive qualification and extended temperature validation but shares identical COT control, pinout, and basic functionality; versus LM25011AQ1MY/NOPB, it trades higher maximum frequency capability for simpler implementation with internal ripple generation.
Availability
LM25011Q1MY/NOPB is available at Aetrix Electronics and suitable for automotive front camera, infotainment, telematics, and safety domain controller designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for LM25011Q1MY/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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LM25011 family targets high-voltage DC/DC conversion in automotive and industrial systems, emphasizing robustness, ease of design, and integration - specifically engineered for cost-sensitive, space-constrained buck bias regulators up to 2 A.
FAQ
What is the operating temperature range for LM25011Q1MY/NOPB?
The LM25011Q1MY/NOPB is qualified per AEC-Q100 Grade 1, supporting continuous operation from –40°C to +125°C junction temperature. This range covers under-hood and cabin-mounted automotive applications including front camera modules and infotainment head units where ambient temperatures may exceed 105°C.
Does LM25011Q1MY/NOPB require external compensation components?
No, LM25011Q1MY/NOPB uses constant-on-time (COT) control architecture, eliminating the need for external compensation networks. Its stability is inherently maintained with ceramic output capacitors, reducing design complexity and component count compared to voltage-mode or current-mode controllers.
How is the switching frequency set on LM25011Q1MY/NOPB?
The switching frequency of LM25011Q1MY/NOPB is set by an external resistor (RT) connected between VIN and the RT pin. On-time is inversely proportional to VIN and RT value, resulting in near-constant frequency across input and load variations - typically adjustable from ~200 kHz to 2 MHz depending on RT and VIN.
What is the purpose of the CSG pin on LM25011Q1MY/NOPB?
The CSG (Current Sense Ground) pin on LM25011Q1MY/NOPB provides a dedicated ground return path for the current-sense amplifier, isolating high-current sensing from signal ground. It must be connected directly to the system ground plane and the low-side of the external current-sense resistor (RS) to ensure accurate valley current limit detection.
Can LM25011Q1MY/NOPB be used in a tracking configuration?
Yes, LM25011Q1MY/NOPB supports tracking via the SS pin: applying a controlled voltage (0.5–2.6 V) to SS causes the output voltage to track that reference scaled by the FB resistor ratio. This enables coordinated startup with other rails or adaptive voltage scaling, provided the SS source is current-limited to ≤1 mA.
LM25011Q1MY/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):
- 6V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 2.51V
- Voltage - Output (Max):
- 40V
- Current - Output:
- 2A
- Frequency - Switching:
- Up to 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
LM25011Q1MY/NOPB FAQ
1.How can I place an order for LM25011Q1MY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25011Q1MY/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 LM25011Q1MY/NOPB reliable?
The price and inventory of LM25011Q1MY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25011Q1MY/NOPB is usually 5 days.
3.What payment methods are accepted for LM25011Q1MY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25011Q1MY/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25011Q1MY/NOPB?
LM25011Q1MY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25011Q1MY/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 LM25011Q1MY/NOPB?
For technical support, including LM25011Q1MY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25011Q1MY/NOPB requirements.
6.How does Aetrix verify that LM25011Q1MY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25011Q1MY/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 LM25011Q1MY/NOPB meets industry standards.
7.What is the process for return or replacement of LM25011Q1MY/NOPB?
All LM25011Q1MY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25011Q1MY/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 LM25011Q1MY/NOPB part is unused and in its original packaging.
Return procedure for LM25011Q1MY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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