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Texas Instruments LM25011Q1MYX/NOPB
- Part No.:
- LM25011Q1MYX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM25011Q1MYX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,355
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Product details
Overview
LM25011Q1MYX/NOPB from Texas Instruments is an AEC-Q100 Grade 1 qualified 42-V, 2-A constant on-time (COT) buck regulator with integrated 2-A N-channel MOSFET switch, adjustable current limit (–130 mV CS threshold), 2.51 V ±2% feedback reference, and power-good (PGD) output. It operates from 6 V to 42 V input and delivers stable bias power in automotive front-camera and infotainment systems.
For engineers reviewing the LM25011Q1MYX/NOPB datasheet, LM25011Q1MYX/NOPB pinout, LM25011Q1MYX/NOPB application, or LM25011Q1MYX/NOPB equivalent, key selection considerations include its COT topology's ultra-fast transient response, no-loop-compensation requirement, thermal shutdown at 155°C, and HVSSOP-10 package with exposed thermal pad for automotive-grade thermal reliability.
Technical Context
The LM25011Q1MYX/NOPB implements constant-on-time control using an internal comparator comparing FB voltage to a 2.51 V reference and a one-shot on-timer whose period scales inversely with VIN and RT resistor value. Its valley-current-limit detection enables smooth CV-to-CC transition without foldback, while minimum off-time (90 ns) and gate-drive pre-charge ensure reliable bootstrap capacitor recharge across load and input conditions.
It integrates a high-side N-channel buck switch (RDS(ON) = 0.6 Ω max), internal 5-V startup regulator, and dedicated current-sense ground (CSG) for accurate RS-based current limiting. The PGD output asserts high when FB reaches ≥95% of VREF, with 3.3% hysteresis, enabling precise system power sequencing in safety-critical automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 42 V - supports wide automotive battery range including cold-crank (6 V) and load-dump (42 V) transients. |
| Output Current | Up to 2 A continuous - defined by integrated N-MOSFET rating and thermal design with HVSSOP PowerPAD. |
| Feedback Reference | 2.51 V ±2% - sets output voltage via RFB1/RFB2 divider; enables precise regulation across –40°C to +125°C. |
| Current Limit Threshold | –130 mV at CS pin - allows adjustable peak/valley current limit via external sense resistor RS. |
| Switching Frequency | Adjustable up to 2 MHz via RT resistor - enables compact magnetics and low-profile designs in space-constrained modules. |
| Power Good Accuracy | ±5% output regulation window - PGD asserts when VOUT is within 95%–100% of target, supporting safe system boot. |
| Thermal Shutdown | 155°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design in under-hood environments. |
Pinout & Package
LM25011Q1MYX/NOPB uses a 10-pin HVSSOP (DGQ) package with 3.00 mm × 3.00 mm body size and exposed thermal pad (EP) soldered to PCB ground for enhanced thermal dissipation (RθJA = 48°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Accepts 6–42 V; requires local low-ESR capacitor to SGND for stability and EMI suppression. |
| RT | On-time programming | Resistor from VIN sets switching frequency; inverse VIN dependence maintains near-constant fSW across line/load. |
| PGD | Power-good indicator | Open-drain logic output; requires external pull-up ≤7 V; signals VOUT ≥95% of regulation target. |
| SS | Soft-start control | Internal 10 µA current source charges external CSS; enables controlled VOUT ramp and tracking functionality. |
| SGND | Signal ground | Reference for FB, RT, SS, PGD; must be separated from power ground to avoid noise coupling into regulation loop. |
| FB | Feedback input | Compares to 2.51 V reference; sets VOUT = 2.51 × (1 + RFB1/RFB2); bias current <100 nA minimizes divider error. |
| CSG | Current-sense ground | Dedicated ground for current-sense path; connects to RS and D1 cathode to isolate sense node from noisy power ground. |
| CS | Current-sense input | Monitors voltage across RS during off-time; triggers valley-current limit when ≤–130 mV. |
| SW | Switching node | Connects to inductor, diode cathode, and BST capacitor; carries high dv/dt; requires tight layout to minimize EMI. |
| BST | Bootstrap supply | Connects to SW via 0.1 µF ceramic capacitor; supplies gate drive for high-side N-MOSFET during on-time. |
Key Features
| Feature | Design Value |
|---|---|
| Constant On-Time (COT) Control | Eliminates need for external compensation network; enables ultra-fast load transient response and stable operation with ceramic output capacitors. |
| Adjustable Valley Current Limit | Configurable via RS; provides smooth constant-voltage-to-constant-current transition without foldback, improving overcurrent robustness. |
| Integrated 2-A N-Channel Buck Switch | Reduces BOM count and layout area; RDS(ON) ≤0.6 Ω ensures high efficiency at 2 A, especially with proper thermal pad connection. |
| Power-Good (PGD) Output | Provides system-level fault indication with 5% regulation window and hysteresis; simplifies power sequencing in multi-rail automotive ECUs. |
| AEC-Q100 Grade 1 Qualification | Validated for –40°C to +125°C junction temperature; includes HBM 2000 V / CDM 750 V ESD ratings per automotive stress standards. |
Applications
| Front Camera Power Supply | ADAS Domain Controller Bias Rail |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and interface circuitry in automotive front-facing camera modules exposed to under-hood temperatures and battery transients. IC Role / Device Role / Timing Role: Primary 5 V or 3.3 V buck regulator delivering up to 2 A with fast transient response to handle burst-mode sensor readouts. Use Value: COT architecture maintains regulation during rapid load steps (e.g., LED flash activation), while PGD enables safe sensor initialization before data capture. |
Use Scenario: Generates clean, sequenced bias rails for radar processor, Ethernet PHY, and CAN transceivers in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: High-reliability buck converter with thermal shutdown and AEC-Q100 qualification for functional safety compliance (ISO 26262 ASIL-B support). Use Value: Exposed thermal pad and 125°C operating junction enable conduction-cooled mounting on metal-core PCBs, reducing need for heatsinks in compact enclosures. |
| Infotainment System USB Hub Supply | Automotive Telematics LTE Modem Bias |
|
Use Scenario: Supplies regulated 5 V to USB 2.0 hub ICs and display interface logic in head-unit infotainment systems with variable input voltage. IC Role / Device Role / Timing Role: Input-range-flexible buck regulator supporting cold-crank (6 V) and load-dump (42 V) events without dropout or overvoltage damage. Use Value: Adjustable soft-start prevents inrush current into large downstream capacitance; RT-programmable fSW avoids AM-band interference. |
Use Scenario: Provides stable 3.3 V or 1.8 V supply to LTE modem baseband and RF front-end in telematics control units (TCUs) with aggressive thermal constraints. IC Role / Device Role / Timing Role: High-efficiency, high-frequency buck regulator enabling small inductors and low-profile layouts in sealed TCU enclosures. Use Value: 2 MHz capability reduces inductor size by >50% vs. 500 kHz solutions; ceramic-capacitor compatibility lowers output impedance for RF noise immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011AMYX/NOPB | Shorter minimum off-time (75 ns vs. 90 ns); supports higher fSW at low VIN; lacks current-limit on-time reduction feature. | Preferred for >1.5 MHz designs with 6–12 V input; not qualified for automotive Grade 1 temperature range. | Select LM25011AMYX/NOPB only for non-automotive, high-frequency applications where AEC-Q100 is not required. |
| LM61480QRNTRQ1 | Pin-compatible 3.5-A synchronous buck with integrated FETs, 4.5–36 V input, and PMBus interface; higher current, lower RDS(ON). | Targets next-gen ADAS ECUs requiring higher current, digital monitoring, and tighter output tolerance (±0.5%). | Choose LM61480QRNTRQ1 when upgrading to 3.5 A output or adding telemetry; LM25011Q1MYX/NOPB remains optimal for cost-sensitive 2-A Grade 1 designs. |
Compared with LM25011AMYX/NOPB, LM25011Q1MYX/NOPB trades higher-frequency capability for automotive qualification and current-limit protection; versus LM61480QRNTRQ1, it offers lower BOM cost and simpler analog control at the expense of programmability and current headroom.
Availability
LM25011Q1MYX/NOPB is available at Aetrix Electronics and suitable for automotive safety systems, infotainment modules, and telematics devices requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for LM25011Q1MYX/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 deep expertise in automotive-grade reliability and functional safety.
The LM25011Q1MYX/NOPB belongs to TI's high-voltage buck regulator product line, designed specifically for demanding automotive power conversion tasks including front-camera, ADAS, and infotainment subsystems.
FAQ
What is the maximum input voltage rating for LM25011Q1MYX/NOPB?
The absolute maximum input voltage rating for LM25011Q1MYX/NOPB is 45 V, with recommended operating range from 6 V to 42 V. This rating accommodates automotive load-dump transients while maintaining safe operation under worst-case conditions. The device includes VIN undervoltage lockout (UVLO) with 5.3 V threshold and 200 mV hysteresis to prevent erratic startup during cold-crank events.
How does the current limit function in LM25011Q1MYX/NOPB?
LM25011Q1MYX/NOPB implements valley-current limiting by monitoring the voltage across an external sense resistor (RS) at the CS pin during the off-time. When the sensed voltage drops to –130 mV (typical), the controller reduces on-time by ~40% to limit peak inductor current. This feature enables smooth transition from constant-voltage to constant-current mode without foldback, protecting both the IC and external components during overload or short-circuit conditions.
Can LM25011Q1MYX/NOPB operate without external loop compensation?
Yes, LM25011Q1MYX/NOPB uses constant-on-time (COT) control architecture, which eliminates the need for external loop compensation components. Its regulation relies on internal ripple injection and direct comparison of FB voltage to the 2.51 V reference, enabling stable operation with ceramic output capacitors and ultra-fast transient response-critical for automotive camera and radar applications with dynamic load profiles.
What is the purpose of the CSG pin on LM25011Q1MYX/NOPB?
The CSG (Current Sense Ground) pin on LM25011Q1MYX/NOPB provides a dedicated, low-noise ground return path for the current-sense circuit. It must be connected to system ground and the low-side of the external sense resistor (RS) to isolate the precision current-limit detection path from noisy power ground currents. Separating CSG from SGND prevents ground bounce from corrupting the –130 mV CS threshold measurement, ensuring accurate and repeatable current limiting.
Is LM25011Q1MYX/NOPB compatible with ceramic output capacitors?
Yes, LM25011Q1MYX/NOPB is fully compatible with ceramic output capacitors due to its constant-on-time control architecture and internal ripple generation at the CS pin. Unlike voltage-mode controllers, it does not require ESR-based damping, allowing use of low-ESR, high-frequency ceramics that reduce output ripple, improve transient response, and minimize board area-key advantages for space-constrained automotive modules.
LM25011Q1MYX/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
LM25011Q1MYX/NOPB FAQ
1.How can I place an order for LM25011Q1MYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25011Q1MYX/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 LM25011Q1MYX/NOPB reliable?
The price and inventory of LM25011Q1MYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25011Q1MYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM25011Q1MYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25011Q1MYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25011Q1MYX/NOPB?
LM25011Q1MYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25011Q1MYX/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 LM25011Q1MYX/NOPB?
For technical support, including LM25011Q1MYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25011Q1MYX/NOPB requirements.
6.How does Aetrix verify that LM25011Q1MYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25011Q1MYX/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 LM25011Q1MYX/NOPB meets industry standards.
7.What is the process for return or replacement of LM25011Q1MYX/NOPB?
All LM25011Q1MYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25011Q1MYX/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 LM25011Q1MYX/NOPB part is unused and in its original packaging.
Return procedure for LM25011Q1MYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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