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Texas Instruments LM25010MH/NOPB
- Part No.:
- LM25010MH/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM25010MH/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,600
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Product details
Overview
LM25010MH/NOPB from Texas Instruments is a 42-V, 1-A step-down switching regulator with integrated N-channel buck switch and constant ON-time control architecture. It operates across 6 V to 42 V input, delivers adjustable output voltage via 2.5 V ±2% feedback reference, and features valley current limiting at 1.25 A - enabling robust power conversion in automotive front-end and industrial DC-DC post-regulation applications.
For engineers reviewing the LM25010MH/NOPB datasheet, LM25010MH/NOPB pinout, LM25010MH/NOPB application, or LM25010MH/NOPB equivalent, key selection criteria include its programmable 100 kHz–1 MHz switching frequency, no-loop-compensation design, thermal shutdown (175°C), soft-start programmability, and WSON-10 package with exposed thermal pad for high-power-density layouts.
Technical Context
The LM25010MH/NOPB implements a constant ON-time regulation scheme where tON varies inversely with VIN, maintaining nearly constant operating frequency across line and load variations. Its valley current limit detection monitors recirculating current through an internal 130 mΩ sense resistor at ISEN/SGND, triggering shutdown if current exceeds 1.25 A.
Control logic integrates a 2.5 V regulation comparator, 2.9 V overvoltage comparator, and gate drive UVLO (1.7–4 V). The internal 7 V bias regulator bypasses to VIN below 8.9 V and regulates above it - reducing dissipation when externally biased between 8 V and 13 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 42 V - supports wide-input industrial and automotive battery-supplied systems without pre-regulation. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Feedback Reference | 2.5 V ±2% - enables precise output voltage setting using standard resistor dividers (e.g., 3.3 V, 5 V, 12 V). |
| Current Limit Threshold | 1.25 A typical - protects against overload and short-circuit while allowing peak currents up to 2 A at SW pin. |
| Switching Frequency | Programmable up to 1 MHz - permits compact magnetics and EMI optimization via external RON resistor. |
| Thermal Shutdown | 175°C with 20°C hysteresis - prevents catastrophic failure during sustained overload or poor heatsinking. |
| Soft-Start Current | 11.5 µA internal source - ensures controlled ramp-up of output voltage to avoid inrush current stress on downstream capacitors. |
Pinout & Package
LM25010MH/NOPB is packaged in a thermally enhanced 10-pin WSON (4.0 mm × 4.0 mm) with exposed metal pad for PCB ground connection - optimized for high-power-density, low-thermal-resistance layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Accepts 6–42 V DC; requires local bypass capacitor to RTN for stability and noise suppression. |
| SW | Switching node | Internally connected to N-channel MOSFET source; connects to inductor, freewheeling diode, and bootstrap capacitor. |
| BST | Bootstrap supply | Charged from VCC during OFF-time via internal diode; powers high-side gate driver for N-MOSFET. |
| ISEN | Current sense input | Monitors valley inductor current during OFF-time; triggers current limit when >1.25 A flows out of this pin. |
| SGND | Current sense ground | Return path for recirculating inductor current; must be routed separately from power ground to avoid noise coupling. |
| RTN | Regulator ground | Ground return for internal circuitry excluding current sense path; connects to system ground near input capacitor. |
| FB | Feedback input | Compares output voltage divider to 2.5 V reference; sets regulated output via R1/R2 ratio per VOUT = 2.5 × (R1 + R2)/R2. |
| SS | Soft-start control | Charged by 11.5 µA current source to 2.5 V; delays full regulation until capacitor reaches threshold. |
| RON/SD | ON-time programming / shutdown | Resistor from VIN sets tON; grounding disables regulator and discharges SS pin. |
| VCC | Bias regulator output | Provides internal 7 V supply; tracks VIN below 8.9 V; accepts external 8–13 V bias to reduce dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Constant ON-time architecture eliminates external compensation network - simplifies layout and improves transient response. |
| Ultra-fast transient response | Load step recovery within microseconds due to immediate ON-time retriggering when FB falls below 2.5 V. |
| Programmable soft start | Adjustable ramp time via external SS capacitor - prevents inrush current and stabilizes startup under varying load conditions. |
| Integrated high-voltage bias regulator | Self-powered from VIN (6–42 V); reduces need for auxiliary bias supply and enables single-rail operation. |
| Valley current limiting | Detects minimum inductor current during OFF-time - provides accurate overcurrent protection independent of duty cycle. |
Applications
| Automotive Front-End Regulator | Industrial Sensor Power Supply |
|---|---|
Use Scenario: Powers ADAS camera modules and infotainment ECUs directly from 12 V or 24 V vehicle battery with cold-crank tolerance down to 6 V. IC Role / Device Role / Timing Role: Primary non-isolated buck converter delivering stable 3.3 V or 5 V to MCU and imaging sensor subsystems. Use Value: Withstands 42 V load-dump transients and maintains regulation during cranking dips - eliminating need for external TVS or pre-regulators. | Use Scenario: Supplies 5 V to industrial IO-Link masters, pressure transducers, and temperature sensors in factory automation equipment. IC Role / Device Role / Timing Role: Secondary-side post-regulator converting 12–24 V field bus voltage to clean, low-noise sensor rail. Use Value: Valley current limit and thermal shutdown ensure safe operation during cable fault or sensor short-circuit events. |
| Telecom DC-DC Converter | Embedded System Power Management |
Use Scenario: Generates 3.3 V from 48 V telecom rectifier output for baseband processor and memory subsystems. IC Role / Device Role / Timing Role: High-efficiency step-down regulator operating at 500 kHz to minimize EMI in dense PCB layouts. Use Value: Programmable frequency avoids sensitive bands; no compensation simplifies compliance testing and reduces BOM count. | Use Scenario: Powers ARM Cortex-M based edge controllers in smart building gateways requiring reliable 1 A at 1.2 V or 1.8 V. IC Role / Device Role / Timing Role: Core power supply IC with soft-start, shutdown control, and thermal monitoring for firmware-managed power sequencing. Use Value: RON/SD pin enables host MCU to enable/disable supply; SS pin allows synchronized ramp-up with other rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011MH/NOPB | Higher 3-A output current rating; same 6–42 V input range and WSON-10 package. | Suitable for higher-power loads like FPGAs or multi-rail PMICs where 1 A is insufficient. | Select LM25011MH/NOPB only when ≥2.5 A peak load current is required - not a drop-in replacement due to different current-sense scaling. |
| TPS54240DGQ | 2.5-A synchronous buck; 3.5–42 V input; uses current-mode control with external compensation. | Offers better light-load efficiency and tighter output regulation but requires compensation design effort. | Choose TPS54240DGQ when synchronous rectification and <1% output tolerance are critical - not pin-compatible with LM25010MH/NOPB. |
Compared with LM25010MH/NOPB, LM25011MH/NOPB increases output capability without changing footprint or control philosophy, while TPS54240DGQ trades simplicity for precision and efficiency - making LM25010MH/NOPB optimal for cost-sensitive, fast-transient, medium-current applications where layout simplicity is prioritized.
Availability
LM25010MH/NOPB is available at Aetrix Electronics and suitable for automotive front-end regulators, industrial sensor power supplies, and telecom DC-DC converters requiring stable component supply across extended temperature and long production lifecycles.
Supply support for LM25010MH/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 - serving automotive, industrial, and communications markets with high-reliability components.
The LM25010MH/NOPB belongs to TI's high-voltage buck regulator product line, designed specifically for rugged, wide-input DC-DC conversion in automotive and industrial environments where input transients, thermal stress, and long-term reliability are critical.
FAQ
What is the maximum input voltage rating for LM25010MH/NOPB?
The absolute maximum input voltage (VIN to RTN) for LM25010MH/NOPB is 45 V, with recommended operation from 6 V to 42 V. Exceeding 42 V continuously risks exceeding thermal limits or violating safe operating area - especially at high ambient temperatures or without adequate heatsinking on the exposed pad.
Does LM25010MH/NOPB require external compensation components?
No, LM25010MH/NOPB does not require external compensation components. Its constant ON-time control architecture eliminates the need for loop compensation networks, simplifying design and improving load transient response - a key differentiator versus traditional voltage-mode or current-mode buck controllers.
How is the switching frequency set on LM25010MH/NOPB?
The switching frequency of LM25010MH/NOPB is set by an external resistor (RON) connected between VIN and the RON/SD pin. Frequency ranges from <100 kHz to 1 MHz depending on RON value and input voltage - calculated using TI's Equation 7 in the datasheet, with typical values between 50 kΩ and 500 kΩ.
Can LM25010MH/NOPB operate in discontinuous conduction mode (DCM)?
Yes, LM25010MH/NOPB automatically transitions into discontinuous conduction mode at light loads. In DCM, the inductor current falls to zero during part of the OFF-time, lowering switching frequency and maintaining high efficiency - unlike fixed-frequency controllers that suffer efficiency loss at low load.
What is the purpose of the SGND pin on LM25010MH/NOPB?
The SGND pin on LM25010MH/NOPB serves as the dedicated return path for current-sense signals - isolating high-di/dt recirculating current from the main RTN ground plane. This separation prevents noise coupling into the feedback and regulation circuitry, ensuring stable operation and accurate current limiting in LM25010MH/NOPB designs.
LM25010MH/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM25010MH/NOPB FAQ
1.How can I place an order for LM25010MH/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25010MH/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 LM25010MH/NOPB reliable?
The price and inventory of LM25010MH/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25010MH/NOPB is usually 5 days.
3.What payment methods are accepted for LM25010MH/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25010MH/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25010MH/NOPB?
LM25010MH/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25010MH/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 LM25010MH/NOPB?
For technical support, including LM25010MH/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25010MH/NOPB requirements.
6.How does Aetrix verify that LM25010MH/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25010MH/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 LM25010MH/NOPB meets industry standards.
7.What is the process for return or replacement of LM25010MH/NOPB?
All LM25010MH/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25010MH/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 LM25010MH/NOPB part is unused and in its original packaging.
Return procedure for LM25010MH/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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