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Texas Instruments LM25011AQ1MY/NOPB
- Part No.:
- LM25011AQ1MY/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM25011AQ1MY/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,035
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Product details
Overview
LM25011AQ1MY/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 threshold), 2.51 V ±2% feedback reference, and power-good output. It operates from 6 V to 42 V input, supports up to 2 MHz switching frequency via RT resistor, and delivers stable bias power in automotive front-camera and infotainment systems.
For engineers reviewing the LM25011AQ1MY/NOPB datasheet, LM25011AQ1MY/NOPB pinout, LM25011AQ1MY/NOPB application, or LM25011AQ1MY/NOPB equivalent, key selection considerations include its COT topology's ultra-fast transient response, no-loop-compensation requirement, thermal shutdown at 155°C, adjustable soft-start timing, and HVSSOP-10 package with exposed thermal pad for automotive-grade thermal reliability.
Technical Context
The LM25011AQ1MY/NOPB implements a constant-on-time control architecture where on-time is inversely proportional to VIN and set by the RT resistor, enabling near-constant switching frequency across line and load variations. Its valley-current-limit detection provides smooth CV-to-CC transition without foldback, and internal ripple generation (ERM) eliminates need for external ripple injection at FB.
It integrates a high-side N-channel buck switch with bootstrap gate drive (BST–SW), pre-charge circuitry, gate-drive UVLO (2.4–4.4 V), and dedicated current-sense ground (CSG) for accurate low-side sensing. The PGD output asserts high when FB reaches ≥95% of 2.51 V, with 3.3% hysteresis, supporting system power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 42 V - supports 12 V/24 V automotive battery rails with 45 V absolute max transient tolerance |
| Output Current | Up to 2 A continuous - limited by integrated N-MOSFET RDS(ON) ≤ 0.6 Ω and thermal design with HVSSOP PowerPAD |
| Feedback Reference | 2.51 V ±2% - sets output voltage via RFB1/RFB2 divider; enables precise 3.3 V, 5 V, or custom bias rail generation |
| Switching Frequency | Adjustable up to 2 MHz - set by RT resistor; LM25011A variant enables higher frequency at low VIN due to shorter min-off-time (52–93 ns) |
| Current Limit Threshold | –130 mV (typ) at CS pin - enables scalable inductor sizing and overcurrent protection without external sense amplifier |
| Power Good Output | PGD logic signal - indicates VOUT within ±5% regulation; requires external pull-up <7 V; supports system reset and sequencing |
| Thermal Shutdown | 155°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design |
Pinout & Package
LM25011AQ1MY/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; withstands 45 V transients |
| RT | On-time programming | Resistor from VIN sets switching frequency; determines tON per COT equation |
| PGD | Power-good indicator | Open-drain output; asserts high when FB ≥ 95% of 2.51 V; needs external pull-up |
| SS | Soft-start control | Internal 10 µA current source charges external cap; enables controlled VOUT ramp and tracking mode |
| SGND | Signal ground | Reference for FB, RT, SS, PGD; separate from CSG to avoid noise coupling |
| FB | Feedback input | Compares to 2.51 V reference; sets output voltage via resistive divider; ripple required for COT stability |
| CSG | Current-sense ground | Dedicated ground return for current-sense path; must connect to RS and system ground |
| CS | Current-sense input | Monitors voltage across external sense resistor RS during off-time; triggers valley-current limit at –130 mV |
| SW | Switching node | Connects to inductor, diode cathode, and BST capacitor; carries high dI/dt; requires tight layout |
| BST | Bootstrap supply | Connects to SW via 0.1 µF ceramic capacitor; supplies gate driver during high-side conduction |
Key Features
| Feature | Design Value |
|---|---|
| Constant-on-time (COT) control | Eliminates loop compensation components; achieves ultra-fast load transient response without stability tuning |
| Integrated 2-A N-channel buck switch | Reduces BOM count and board space; RDS(ON) ≤ 0.6 Ω minimizes conduction loss at full load |
| Adjustable valley current limit | Enables smaller inductor selection and avoids saturation under overload; no foldback behavior ensures predictable CC mode |
| Power-good (PGD) output | Provides system-level power sequencing and fault indication; supports fail-safe startup in safety-critical modules |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C junction operation; meets automotive reliability and stress-test requirements |
Applications
| Automotive Front Camera | Infotainment Power Supply |
|---|---|
Use Scenario: Powers image sensor and ISP in ADAS front-facing camera module operating from 12 V battery with cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Primary 3.3 V or 5 V bias regulator delivering up to 2 A with fast transient response to handle burst-mode sensor readout. Use Value: COT topology maintains regulation during rapid current steps; PGD enables clean system boot; 42 V rating survives 36 V load-dump events. | Use Scenario: Supplies processor core, display interface, and audio codec in vehicle head unit with wide input voltage range and EMI-sensitive environment. IC Role / Device Role / Timing Role: High-efficiency buck converter generating stable 1.2 V, 1.8 V, or 3.3 V rails; adjustable frequency avoids AM-band interference. Use Value: 2 MHz capability allows small external magnetics; ceramic-capacitor compatibility reduces footprint and cost; thermal shutdown prevents field failures. |
| Telecom Remote Radio Unit | Industrial Control I/O Module |
Use Scenario: Provides isolated DC-DC bias for RF front-end in 4G/5G remote radio head powered from 48 V telecom supply. IC Role / Device Role / Timing Role: Intermediate 5 V or 12 V step-down stage feeding downstream isolated converters; handles 42 V max input with robust transient immunity. Use Value: 45 V absolute max rating accommodates 48 V system surges; AEC-Q100 qualification ensures long-term reliability in harsh outdoor enclosures. | Use Scenario: Powers microcontroller, analog front-end, and CAN transceiver in DIN-rail mounted PLC I/O module with 24 V industrial supply. IC Role / Device Role / Timing Role: Main 3.3 V system rail regulator; soft-start prevents inrush into large downstream capacitance; PGD signals MCU reset. Use Value: Adjustable current limit protects against shorted outputs; exposed thermal pad sustains 2 A load at 70°C ambient; no compensation simplifies design validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011Q1MY/NOPB | Non-A version; same 90–208 ns min-off-time; lacks LM25011A's shorter off-time for high-frequency operation at low VIN | Used where 2 MHz operation not required; suitable for <1 MHz designs with wider VIN range | Select when AEC-Q100 Grade 1 is mandatory but high-frequency operation is unnecessary |
| LM5164QPWPRQ1 | 4.5–65 V input, 1 A, COT, integrated FET; different pinout, no PGD, lower current rating | Targeted at lower-power automotive loads; lacks power-good signaling and 2 A capability | Choose for cost-sensitive 1 A applications where PGD and 2 A output are not required |
Compared with LM25011Q1MY/NOPB, the LM25011AQ1MY/NOPB enables higher-frequency operation at low input voltages due to its 52–93 ns minimum off-time, while LM5164QPWPRQ1 offers wider input range but sacrifices current capability and power-good functionality-making LM25011AQ1MY/NOPB optimal for 2 A, PGD-enabled, high-frequency automotive bias rails.
Availability
LM25011AQ1MY/NOPB is available at Aetrix Electronics and suitable for automotive safety systems, infotainment head units, and telecommunication remote radio units requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM25011AQ1MY/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 and embedded processing technologies, with leadership in power management ICs for automotive, industrial, and communications markets.
The LM25011 family is designed specifically for high-voltage, medium-current DC-DC conversion in automotive and industrial environments, emphasizing reliability, transient robustness, and simplified design through constant-on-time control.
FAQ
What is the maximum switching frequency supported by LM25011AQ1MY/NOPB?
The LM25011AQ1MY/NOPB supports switching frequencies up to 2 MHz, enabled by its LM25011A variant's shortened minimum off-time (52–93 ns). This allows stable high-frequency operation even at low input voltages, reducing external component size. Frequency is set via the RT resistor and VIN, and remains nearly constant across line and load variations due to the constant-on-time architecture. The LM25011AQ1MY/NOPB datasheet specifies tON and tOFF limits that define this upper bound.
Does LM25011AQ1MY/NOPB require external loop compensation components?
No, LM25011AQ1MY/NOPB does not require external loop compensation components. Its constant-on-time (COT) control architecture eliminates the need for compensation networks, simplifying design and improving transient response. Stability is inherently maintained using ceramic output capacitors and internal ripple generation (ERM), as confirmed in the LM25011AQ1MY/NOPB functional description and application schematics. This is a core differentiator versus voltage-mode or current-mode controllers.
How is the current limit configured on LM25011AQ1MY/NOPB?
The current limit on LM25011AQ1MY/NOPB is configured via the voltage threshold at the CS pin, fixed at –130 mV (typical) relative to CSG. An external sense resistor (RS) placed between the switch node and ground develops this voltage during off-time recirculation. No programming resistor or external IC is needed-the LM25011AQ1MY/NOPB detects valley current directly, enabling simple, scalable overcurrent protection. The threshold is specified across –40°C to +125°C in the LM25011AQ1MY/NOPB electrical characteristics table.
What is the purpose of the PGD pin on LM25011AQ1MY/NOPB?
The PGD (Power Good) pin on LM25011AQ1MY/NOPB is an open-drain output that signals when the regulated output voltage has reached and stabilized within ±5% of its target value-i.e., when the FB pin voltage rises to ≥95% of the 2.51 V internal reference. It provides critical power sequencing feedback to microcontrollers or system supervisors. An external pull-up resistor (<7 V) is required, and the LM25011AQ1MY/NOPB datasheet specifies PGD's hysteresis (3.3%) and low-state voltage (≤180 mV at 1 mA sink) for reliable interfacing.
Is LM25011AQ1MY/NOPB pin-compatible with LM25011Q1MY/NOPB?
Yes, LM25011AQ1MY/NOPB is pin-compatible with LM25011Q1MY/NOPB-both use identical 10-pin HVSSOP (DGQ) packaging and share identical pin functions, assignments, and recommended layout. However, the LM25011AQ1MY/NOPB features a shorter minimum off-time (52–93 ns vs. 90–208 ns), enabling higher-frequency operation at low input voltages. No PCB changes are required for substitution, though RT resistor values may need adjustment to maintain target frequency. This compatibility is confirmed in TI's LM25011 family datasheet device information table.
LM25011AQ1MY/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
LM25011AQ1MY/NOPB FAQ
1.How can I place an order for LM25011AQ1MY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25011AQ1MY/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 LM25011AQ1MY/NOPB reliable?
The price and inventory of LM25011AQ1MY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25011AQ1MY/NOPB is usually 5 days.
3.What payment methods are accepted for LM25011AQ1MY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25011AQ1MY/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25011AQ1MY/NOPB?
LM25011AQ1MY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25011AQ1MY/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 LM25011AQ1MY/NOPB?
For technical support, including LM25011AQ1MY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25011AQ1MY/NOPB requirements.
6.How does Aetrix verify that LM25011AQ1MY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25011AQ1MY/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 LM25011AQ1MY/NOPB meets industry standards.
7.What is the process for return or replacement of LM25011AQ1MY/NOPB?
All LM25011AQ1MY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25011AQ1MY/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 LM25011AQ1MY/NOPB part is unused and in its original packaging.
Return procedure for LM25011AQ1MY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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