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Texas Instruments LM25011MY/NOPB
- Part No.:
- LM25011MY/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM25011MY/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 10HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,845
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Product details
Overview
LM25011MY/NOPB from Texas Instruments is a 42-V, 2-A constant-on-time (COT) synchronous buck regulator with integrated 2-A N-channel MOSFET switch, 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, supports switching frequencies up to 2 MHz, and features power-good (PGD) indication for system monitoring in automotive and industrial bias rail applications.
For engineers reviewing the LM25011MY/NOPB datasheet, LM25011MY/NOPB pinout, LM25011MY/NOPB application, or LM25011MY/NOPB equivalent, key selection considerations include its COT topology's ultra-fast transient response, no-loop-compensation design, ceramic-capacitor compatibility, adjustable soft-start timing, and thermal shutdown with 155°C junction limit.
Technical Context
The LM25011MY/NOPB implements constant-on-time control using an internal comparator comparing FB voltage against a 2.51-V reference and a one-shot on-timer whose duration scales inversely with VIN and is set by RT resistor value. Its valley-current-limit detection enables smooth CV-to-CC transition without foldback, while minimum off-time (90 ns) ensures bootstrap capacitor recharge and stable gate drive.
It integrates a high-side N-channel buck switch with RDS(ON) of 0.3–0.6 Ω, gate driver pre-charge, BST-SW UVLO (2.4–4.4 V), and internal ripple generation at CS pin (25 mVP-P). The PGD output asserts high when FB reaches ≥95% of 2.51 V, with 3.3% hysteresis and external pull-up requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 42 V - supports wide-range industrial and automotive battery inputs including 12 V, 24 V, and 36 V systems. |
| Output Current | Up to 2 A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Switching Frequency | Adjustable up to 2 MHz via RT resistor - enables compact magnetics and low-profile designs with minimal EMI filtering. |
| Feedback Reference | 2.51 V ±2% - sets precise output voltage via external resistor divider (VOUT = 2.51 × (RFB1 + RFB2)/RFB2). |
| Power Good Threshold | 95% of 2.51 V (≈2.38 V) rising - provides reliable system enable signaling with 3.3% hysteresis for noise immunity. |
| Thermal Shutdown | 155°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
| Minimum Off-Time | 90 ns - guarantees sufficient time for BST capacitor recharge and stable high-side gate drive operation. |
Pinout & Package
LM25011MY/NOPB is housed in a thermally enhanced 10-pin HVSSOP package (3.00 mm × 3.00 mm) with exposed pad soldered to PCB ground for improved thermal dissipation (RθJA = 48°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Accepts 6–42 V DC; requires local low-ESR capacitor to SGND for stability and transient suppression. |
| RT | On-time programming | Resistor from VIN sets switching frequency; inverse relationship with VIN maintains near-constant fSW across line/load. |
| PGD | Power-good open-drain output | Asserts high when FB ≥2.38 V; requires external pull-up ≤7 V for logic-level interfacing with MCU or PMIC. |
| SS | Soft-start control | Internal 10-µA current source charges external capacitor; ramp time determines startup slew rate and inrush control. |
| SGND | Signal ground | Reference for FB, RT, SS, PGD; must be separated from power ground until joined at single point near CIN. |
| FB | Feedback input | Compares against 2.51-V internal reference; sets output voltage via resistive divider from VOUT. |
| CSG | Current-sense ground | Return path for current-sense resistor; must connect directly to RS and system ground to avoid sensing errors. |
| CS | Current-sense input | Monitors voltage across external sense resistor during off-time; threshold is –130 mV for valley-current limiting. |
| SW | Switching node | Connects to inductor, diode cathode, and BST capacitor; carries high dv/dt and peak currents-requires tight layout. |
| BST | Bootstrap supply | 0.1-µF capacitor between BST and SW supplies gate driver; recharged during off-time via internal diode. |
Key Features
| Feature | Design Value |
|---|---|
| Constant On-Time (COT) Control | Eliminates need for external compensation network, enabling fast load transient response (<1 µs) and stable operation with ceramic output capacitors. |
| Adjustable Valley Current Limit | Set via RS value; allows optimization of inductor size and peak current handling while avoiding saturation under overload. |
| Integrated 2-A N-Channel Buck Switch | Reduces BOM count and layout area; RDS(ON) of 0.3–0.6 Ω minimizes conduction loss at full load. |
| Power-Good Output with Hysteresis | Provides reliable system sequencing and fault detection; 3.3% hysteresis prevents chatter near regulation threshold. |
| Adjustable Soft-Start Timing | External capacitor sets controlled VOUT ramp rate, limiting inrush current and preventing input rail collapse during startup. |
Applications
| Automotive Front Camera Power Supply | Industrial PLC I/O Module Bias Rail |
|---|---|
Use Scenario: Powers image sensor, ISP, and interface circuitry in ADAS front-facing cameras operating from 12 V vehicle battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary 3.3-V or 5-V buck regulator delivering 1.5 A with fast transient response to handle burst-mode sensor readouts. Use Value: COT architecture maintains regulation during rapid load steps; PGD enables safe camera initialization before data capture. | Use Scenario: Generates isolated 5-V or 3.3-V auxiliary supply for digital I/O conditioning, ADC reference, and communication transceivers in programmable logic controllers. IC Role / Device Role / Timing Role: High-voltage input buck converter accepting 24 V DC field bus and rejecting line transients up to 45 V. Use Value: 42-V rating and UVLO (5.3 V) ensure reliable start-up after brownouts; thermal shutdown protects during enclosure overheating. |
| Telecom Remote Radio Unit (RRU) Bias | Medical Diagnostic Sensor Interface |
Use Scenario: Supplies clean 1.2-V or 1.8-V core voltage to FPGAs and RF SoCs in outdoor base station RRUs powered from 48 V telecom rectifiers. IC Role / Device Role / Timing Role: Efficient intermediate-stage buck regulator stepping 48 V down to 5 V, then fed to secondary LDOs or POL converters. Use Value: 2-MHz capability enables small inductors; low output ripple (<10 mVP-P) reduces noise coupling into sensitive RF paths. | Use Scenario: Provides regulated 3.3-V supply to analog front-end amplifiers, ADCs, and optical sensors in portable diagnostic devices with Li-ion battery input. IC Role / Device Role / Timing Role: Main system bias regulator supporting variable load from sleep (10 µA) to active acquisition (1.2 A) modes. Use Value: Discontinuous conduction mode at light loads maintains >85% efficiency; soft-start prevents false trigger of sensor self-test routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011A/NOPB | Shorter minimum off-time (52–93 ns vs. 90–208 ns); optimized for higher-frequency operation at low VIN. | Preferred for 2-MHz+ designs with 9–12 V input; not drop-in due to different on-time/current-limit behavior. | Select LM25011A/NOPB only when targeting >1.5 MHz at VIN ≤12 V; LM25011MY/NOPB offers better current-limit foldback protection. |
| LM5116MH/NOPB | Current-mode controller (not integrated switch); supports up to 100 V input and 10 A output with external MOSFETs. | Suitable for higher-power or higher-input-voltage applications where LM25011MY/NOPB's 2-A/42-V limits are exceeded. | Choose LM5116MH/NOPB for scalable 48 V telecom or industrial motor drive bias rails requiring >2 A or >42 V input. |
Compared with LM25011A/NOPB, LM25011MY/NOPB provides stronger current-limit protection with 40% on-time reduction during overload, while LM5116MH/NOPB trades integration for higher voltage/current scalability-making LM25011MY/NOPB optimal for cost-sensitive, fixed 2-A, 6–42 V bias applications.
Availability
LM25011MY/NOPB is available at Aetrix Electronics and suitable for automotive safety systems, industrial PLCs, telecom remote radio units, and medical sensor interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM25011MY/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 experience in automotive-grade and industrial-reliability IC design.
The LM25011MY/NOPB belongs to TI's high-voltage buck regulator product line, engineered for robust, low-component-count DC/DC conversion in harsh environments where input transients, thermal stress, and long-term reliability are critical.
FAQ
What is the maximum input voltage rating for LM25011MY/NOPB?
The absolute maximum input voltage rating for LM25011MY/NOPB is 45 V, with recommended operating range from 6 V to 42 V. Operation beyond 42 V is permissible only for short-duration transients such as load dump in automotive systems, provided thermal and SOA limits are observed. The device includes VIN undervoltage lockout (UVLO) with 5.3 V turn-on threshold and 200 mV hysteresis to ensure clean startup.
How does the LM25011MY/NOPB implement constant-on-time control without external compensation?
The LM25011MY/NOPB uses an internal comparator comparing FB voltage to a 2.51-V reference and a one-shot on-timer whose duration depends on VIN and the RT resistor value. This eliminates the need for loop compensation components because regulation relies on ripple-based timing rather than error-amplifier feedback. As a result, LM25011MY/NOPB achieves ultra-fast transient response and stable operation with ceramic output capacitors-key advantages over traditional voltage-mode controllers.
What is the purpose of the CSG pin on LM25011MY/NOPB, and how should it be connected?
The CSG (Current Sense Ground) pin on LM25011MY/NOPB serves as the dedicated return path for the current-sense amplifier, isolating high-noise power ground currents from the precision FB and regulation circuitry. It must be connected directly to the system ground plane and to the low-side terminal of the external current-sense resistor (RS). Improper routing-such as sharing traces with SGND or power ground-introduces offset errors that degrade current-limit accuracy and may cause premature foldback or failure to trip.
Can LM25011MY/NOPB be used in automotive applications, and what qualifications does it meet?
LM25011MY/NOPB itself is not AEC-Q100 qualified; however, the pin-compatible LM25011-Q1 variant meets AEC-Q100 Grade 1 (–40°C to +125°C junction temperature) for automotive safety and infotainment systems. LM25011MY/NOPB shares identical electrical specifications and functional block diagram with the Q1 version but is rated for industrial temperature range (–40°C to +125°C). For production automotive use, LM25011-Q1/NOPB is required; LM25011MY/NOPB is suitable for industrial and telecom applications with equivalent thermal and electrical performance.
How is the switching frequency adjusted on LM25011MY/NOPB, and what is the practical range?
The switching frequency of LM25011MY/NOPB is set by an external resistor (RT) connected between VIN and the RT pin, with typical values ranging from 30.9 kΩ (≈2 MHz at 12 V) to 301 kΩ (≈300 kHz). The on-time scales inversely with VIN, maintaining near-constant frequency across input and load variations. Minimum on-time is 150 ns (at 12 V, 50 kΩ), and minimum off-time is 90 ns-limiting maximum practical frequency to ~2 MHz at nominal conditions. Equation-based design tools like TI's WEBENCH Power Designer support accurate RT selection for target fSW.
LM25011MY/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-PowerTFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-HVSSOP
LM25011MY/NOPB FAQ
1.How can I place an order for LM25011MY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25011MY/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 LM25011MY/NOPB reliable?
The price and inventory of LM25011MY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25011MY/NOPB is usually 5 days.
3.What payment methods are accepted for LM25011MY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25011MY/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25011MY/NOPB?
LM25011MY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25011MY/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 LM25011MY/NOPB?
For technical support, including LM25011MY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25011MY/NOPB requirements.
6.How does Aetrix verify that LM25011MY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25011MY/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 LM25011MY/NOPB meets industry standards.
7.What is the process for return or replacement of LM25011MY/NOPB?
All LM25011MY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25011MY/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 LM25011MY/NOPB part is unused and in its original packaging.
Return procedure for LM25011MY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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