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Texas Instruments LM25010Q1MHX/NOPB
- Part No.:
- LM25010Q1MHX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM25010Q1MHX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,508
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Product details
Overview
LM25010Q1MHX/NOPB from Texas Instruments is an automotive-grade 42-V, 1-A step-down switching regulator with integrated N-channel buck switch, valley current limiting at 1.25 A, programmable switching frequency up to 1 MHz, and constant ON-time control requiring no loop compensation. It operates in automotive power supplies for engine control units and body electronics.
For engineers reviewing the LM25010Q1MHX/NOPB datasheet, LM25010Q1MHX/NOPB pinout, LM25010Q1MHX/NOPB application, or LM25010Q1MHX/NOPB equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (–40°C to 125°C ambient), 2.5 V ±2% feedback reference, RON/SD shutdown control, BST bootstrap architecture, and thermally enhanced 10-pin WSON package.
Technical Context
The LM25010Q1MHX/NOPB implements a constant ON-time regulation scheme where tON varies inversely with input voltage, enabling nearly constant operating frequency across line and load variations. Its valley current limit detection uses internal sense resistor (130 mΩ) and monitors recirculating current at ISEN during OFF-time.
Control relies on a 2.5-V reference comparator against FB, with overvoltage protection triggered at 2.9 V. Startup uses an internal 11.5-µA soft-start current source charging SS to 2.5 V, while thermal shutdown activates at 175°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 42 V - supports wide automotive battery transients including cold-crank and load-dump conditions. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in vehicle subsystems. |
| Switching Frequency | Up to 1 MHz - enables compact magnetics and low-profile output filters in space-constrained ECUs. |
| Feedback Reference | 2.5 V ±2% - sets precise output voltage via external resistor divider (e.g., 5 V or 3.3 V rails). |
| Valley Current Limit | 1.25 A typical - protects against short-circuit and overload by disabling switch until inductor current falls below threshold. |
| Junction Temp Range | –40°C to 150°C - meets AEC-Q100 Grade 0 requirements for under-hood applications. |
| Package | 10-pin WSON (4.0 mm × 4.0 mm) - thermally enhanced exposed-pad design for efficient PCB heat dissipation. |
Pinout & Package
LM25010Q1MHX/NOPB is housed in a 10-pin WSON package (DPR) with 4.0 mm × 4.0 mm body size and exposed thermal pad. The pad must be soldered to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Internal N-channel MOSFET source connection; ties to inductor, freewheeling diode, and bootstrap capacitor. |
| BST | Bootstrap supply | Charges external capacitor (C4) from VCC during OFF-time to drive high-side gate of integrated buck switch. |
| VIN | Main input supply | Accepts 6–42 V DC; requires local bypass capacitors near VIN and RTN pins for EMI suppression. |
| VCC | Bias regulator output | Internally regulated at 7 V for VIN > 8.9 V; tracks VIN within 100 mV for lower inputs; powers internal circuitry. |
| ISEN | Current sense input | Monitors recirculating inductor current during OFF-time; triggers valley current limit when >1.25 A. |
| SGND | Sense ground return | Separate ground path for current-sense resistor; prevents noise coupling into regulation loop. |
| RTN | Power ground return | Ground reference for all internal circuitry except current sense; connects to system ground plane. |
| FB | Feedback input | Compares output voltage (via resistor divider) to 2.5 V reference; controls ON-time to regulate VOUT. |
| SS | Soft-start control | Internal 11.5 µA current source charges external capacitor to ramp reference voltage and limit inrush current. |
| RON/SD | ON-time programming / shutdown | Resistor from VIN sets tON; grounding disables regulator and forces SS to ground. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Constant ON-time architecture eliminates external compensation network, reducing BOM count and layout sensitivity. |
| Ultra-fast transient response | Load steps are corrected within one switching cycle due to immediate ON-time retriggering upon FB dip below 2.5 V. |
| Programmable soft start | External capacitor on SS pin sets startup time; prevents output overshoot and limits peak inductor current during turn-on. |
| Integrated high-voltage bias regulator | VCC self-generates from VIN (6–42 V); eliminates need for external LDO or charge pump in high-input systems. |
| AEC-Q100 Grade 1 & 0 qualified | Validated for –40°C to 125°C (Grade 1) and –40°C to 150°C (Grade 0) ambient operation with HBM ±2 kV and CDM ±750 V ESD ratings. |
Applications
| Engine Control Unit (ECU) Power Supply | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
Use Scenario: Supplies stable 5 V or 3.3 V to MCU, CAN interface, and analog sensors in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 12 V/24 V battery rail to logic-level voltages with fast load transient handling during injector firing. Use Value: Maintains regulation during cold-crank (down to 6 V) and load-dump (up to 42 V), ensuring uninterrupted MCU operation. | Use Scenario: Powers image sensor, ISP, and serializer in rear-view or surround-view camera modules mounted near exhaust or wheel wells. IC Role / Device Role / Timing Role: High-efficiency step-down converter delivering 1.8 V or 2.8 V with minimal thermal rise in sealed enclosures. Use Value: 150°C junction rating and WSON thermal pad enable reliable operation in high-ambient under-hood environments. |
| Automotive Body Control Module (BCM) | Infotainment System Power Rail |
Use Scenario: Generates auxiliary 5 V rail for door lock actuators, window lift motors, and LED lighting drivers in centralized BCM designs. IC Role / Device Role / Timing Role: High-current buck regulator supporting pulsed loads up to 1 A without output collapse or thermal shutdown. Use Value: Valley current limit (1.25 A) and thermal shutdown (175°C) protect against motor stall and wiring faults. | Use Scenario: Provides clean 3.3 V supply to audio DSP, touchscreen controller, and Bluetooth/WiFi modules in head-unit designs. IC Role / Device Role / Timing Role: Low-noise, high-PSSR buck regulator minimizing switching artifacts in sensitive analog audio paths. Use Value: Constant-frequency operation (up to 1 MHz) and tight 2.5 V ±2% reference ensure stable digital core voltage under dynamic processing loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011Q1MHX/NOPB | Higher 3-A output current rating; same 6–42 V input range and WSON-10 package; shares identical pinout and control architecture. | Required for applications needing >1 A continuous output, such as multi-rail infotainment processors or high-power ADAS radar SoCs. | Select when higher output current is needed without changing PCB layout or control strategy. |
| TPS54160AQDGQRQ1 | Wider 3.5–60 V input range; 1.5-A current limit; uses current-mode control with external compensation; 16-pin HTSSOP package. | Preferred for ultra-wide input systems (e.g., dual-battery trucks) or where adjustable slope compensation is needed for stability with ceramic output caps. | Choose when input exceeds 42 V or when design flexibility with compensation network is prioritized over simplicity. |
Compared with LM25010Q1MHX/NOPB, LM25011Q1MHX/NOPB offers direct pin-compatible scaling to 3 A, while TPS54160AQDGQRQ1 trades simplicity for broader input range and compensation control-making it suitable for more demanding or variable-supply automotive platforms.
Availability
LM25010Q1MHX/NOPB is available at Aetrix Electronics and suitable for automotive power supplies, engine control units, and ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM25010Q1MHX/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 automotive, industrial, and power management ICs.
The LM25010Q1MHX/NOPB belongs to TI's automotive-qualified DC/DC buck regulator product line, designed specifically for robust, high-voltage power conversion in safety-critical vehicle subsystems.
FAQ
What is the maximum input voltage rating for LM25010Q1MHX/NOPB?
The LM25010Q1MHX/NOPB has an absolute maximum input voltage (VIN to RTN) of 45 V, with recommended operating range from 6 V to 42 V. This allows reliable operation during automotive load-dump events up to 42 V, as specified in ISO 7637-2 and SAE J1113-11 standards. Exceeding 45 V risks permanent damage per the Absolute Maximum Ratings table in the official datasheet.
Does LM25010Q1MHX/NOPB require external compensation components?
No, the LM25010Q1MHX/NOPB uses a constant ON-time control architecture that eliminates the need for external loop compensation components. Its regulation relies on comparing FB voltage to an internal 2.5 V reference and adjusting tON based on VIN and RON, resulting in inherent stability and ultra-fast transient response without RC networks or type-II/III compensators.
How is the switching frequency set on LM25010Q1MHX/NOPB?
The switching frequency of LM25010Q1MHX/NOPB is determined by the RON resistor connected between VIN and the RON/SD pin, along with input voltage. For continuous conduction mode, FS ≈ VOUT × (VIN − 1.4 V) / [1.18×10⁻¹⁰ × (RON + 1.4 kΩ) × VIN]. Typical values yield frequencies from <100 kHz to 1 MHz, with RON = 200 kΩ producing ~200 kHz at VIN = 24 V and VOUT = 5 V.
What thermal management features does LM25010Q1MHX/NOPB include?
The LM25010Q1MHX/NOPB integrates thermal shutdown that disables the buck switch at 175°C junction temperature, with 20°C hysteresis for automatic recovery. Its 10-pin WSON package includes an exposed thermal pad requiring solder connection to PCB ground plane. Thermal metrics show RθJA = 36°C/W (DPR), enabling 1 A operation at up to 125°C ambient with proper copper area and airflow.
Can LM25010Q1MHX/NOPB operate in discontinuous conduction mode (DCM)?
Yes, the LM25010Q1MHX/NOPB automatically transitions into discontinuous conduction mode at light loads, where inductor current falls to zero during part of the OFF-time. In DCM, switching frequency decreases with load, improving light-load efficiency. The device maintains regulation down to zero load, with minimum load current for CCM equal to half the inductor ripple amplitude, calculated as ILOAD(MIN) = ΔI/2.
LM25010Q1MHX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm 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):
- 2.5V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 1A
- Frequency - Switching:
- 100kHz ~ 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM25010Q1MHX/NOPB FAQ
1.How can I place an order for LM25010Q1MHX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25010Q1MHX/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 LM25010Q1MHX/NOPB reliable?
The price and inventory of LM25010Q1MHX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25010Q1MHX/NOPB is usually 5 days.
3.What payment methods are accepted for LM25010Q1MHX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25010Q1MHX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25010Q1MHX/NOPB?
LM25010Q1MHX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25010Q1MHX/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 LM25010Q1MHX/NOPB?
For technical support, including LM25010Q1MHX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25010Q1MHX/NOPB requirements.
6.How does Aetrix verify that LM25010Q1MHX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25010Q1MHX/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 LM25010Q1MHX/NOPB meets industry standards.
7.What is the process for return or replacement of LM25010Q1MHX/NOPB?
All LM25010Q1MHX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25010Q1MHX/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 LM25010Q1MHX/NOPB part is unused and in its original packaging.
Return procedure for LM25010Q1MHX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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