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Texas Instruments LM25010Q1MH/NOPB
- Part No.:
- LM25010Q1MH/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM25010Q1MH/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:859
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Product details
Overview
LM25010Q1MH/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 architecture requiring no loop compensation. It operates across 6 V to 42 V input and delivers stable output in automotive body control modules and infotainment power supplies.
For engineers reviewing the LM25010Q1MH/NOPB datasheet, LM25010Q1MH/NOPB pinout, LM25010Q1MH/NOPB application, or LM25010Q1MH/NOPB equivalent, key selection considerations include AEC-Q100 Grade 1 qualification (–40°C to 125°C ambient), 2.5 V ±2% feedback reference, thermal shutdown at 175°C, soft-start via external capacitor, and bootstrap gate drive for high-side N-MOSFET.
Technical Context
The LM25010Q1MH/NOPB implements a constant ON-time regulation scheme where tON varies inversely with VIN to maintain nearly constant operating frequency across line and load variations. Its valley current limit detection monitors recirculating current through SGND during OFF-time, triggering shutdown if ISEN current exceeds 1.25 A.
It integrates a high-voltage bias regulator that bypasses VIN to VCC below 8.9 V and regulates VCC at 7 V above that threshold, with internal UVLO at 5.25 V and gate-drive UVLO at 1.7–4 V (BST–SW). The 260 ns fixed minimum OFF-time ensures reliable bootstrap capacitor recharge.
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 distributed ECUs. |
| Switching Frequency | Up to 1 MHz - enables compact magnetics and low-profile designs while avoiding AM radio band interference. |
| Feedback Reference | 2.5 V ±2% - sets precise output voltage via external resistor divider; enables 3.3 V, 5 V, or custom rail generation. |
| Current Limit Threshold | 1.25 A typical - protects against short-circuit and overload by disabling switch until inductor current falls below threshold. |
| Thermal Shutdown | 175°C with 20°C hysteresis - prevents catastrophic failure during sustained overloads or poor PCB thermal design. |
| Soft-Start Time | Programmable via SS pin capacitor - controls inrush current and prevents output overshoot during power-up sequences. |
Pinout & Package
LM25010Q1MH/NOPB is housed in a thermally enhanced 10-pin WSON package (4.00 mm × 4.00 mm) with exposed pad for improved heat dissipation. Pin 1 is SW; pin 10 is VIN; the exposed pad must be connected to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Internal N-channel MOSFET source - connects directly to inductor, freewheeling diode, and bootstrap capacitor. |
| VIN | Main input supply | Accepts 6–42 V DC - requires local ceramic bypass capacitors near pins 10 and 5 (RTN) for EMI suppression. |
| BST | Bootstrap supply | Charges external BST–SW capacitor (0.022 µF ceramic) during OFF-time to drive high-side gate. |
| ISEN | Current sense input | Monitors valley inductor current during OFF-time; triggers current limit when >1.25 A flows out of this pin. |
| SGND | Sense ground | Return path for current-sense resistor - must be routed separately from power ground to avoid noise coupling. |
| RTN | Regulator ground | Ground return for all internal circuitry except current sense - ties to system ground at single point near VCC/SS. |
| FB | Feedback input | Compares output voltage (via R1/R2 divider) to 2.5 V reference - determines ON-time initiation and regulation accuracy. |
| SS | Soft-start control | Internal 11.5 µA current source charges external capacitor to ramp reference voltage - prevents output overshoot and inrush. |
| RON/SD | ON-time set / shutdown | Resistor from VIN sets tON; grounding disables regulator - provides enable control and fault recovery capability. |
| VCC | Bias regulator output | Internally regulated at 7 V for VIN > 8.9 V; tracks VIN below that - powers internal logic and gate driver. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Constant ON-time architecture eliminates external compensation network - reduces BOM count and layout sensitivity. |
| Ultra-fast transient response | Load step recovery within microseconds - maintains tight output regulation during CPU wake/sleep transitions. |
| Integrated high-voltage bias regulator | Eliminates need for external LDO - simplifies power tree and improves efficiency in 12 V/24 V automotive systems. |
| AEC-Q100 Grade 1 qualified | Validated for –40°C to 125°C ambient operation - meets functional safety requirements for non-safety-critical automotive subsystems. |
| Programmable soft start | Adjustable startup time via external SS capacitor - prevents brownout on shared rails and avoids inrush-induced voltage droop. |
Applications
| Automotive Body Control Module | Infotainment Power Supply |
|---|---|
Use Scenario: Powers MCU, LIN transceivers, and LED drivers in door modules and seat controllers. IC Role / Device Role / Timing Role: Primary 5 V/3.3 V buck regulator delivering 1 A with fast transient response to handle intermittent loads. Use Value: AEC-Q100 qualification ensures reliability across temperature cycling and vibration; 42 V input withstands load-dump events. | Use Scenario: Generates clean 3.3 V rail for audio DSP and display interface ICs in head units. IC Role / Device Role / Timing Role: Secondary post-regulator stepping down from 5 V or 12 V intermediate bus. Use Value: No loop compensation simplifies layout in space-constrained dashboards; 1 MHz operation avoids AM band interference. |
| Telematics GPS Module | ADAS Camera Power |
Use Scenario: Supplies 3.3 V to GNSS receiver and cellular modem in telematics control units. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting burst-mode operation during GPS signal acquisition. Use Value: Valley current limit prevents damage during antenna short-circuit faults; thermal shutdown protects under sealed enclosure conditions. | Use Scenario: Provides stable 1.8 V or 2.8 V for image sensor and serializer in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Low-noise, tightly regulated point-of-load converter with soft-start to prevent sensor reset glitches. Use Value: 2.5 V ±2% reference enables accurate output setting; SS pin allows synchronization with camera boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011Q1MH/NOPB | Higher 2-A output current rating; same package and pinout; identical control architecture. | Required when load exceeds 1 A or peak current demands exceed 1.5 A. | Select LM25011Q1MH/NOPB only if higher current capability is needed - otherwise LM25010Q1MH/NOPB offers optimal cost/performance balance. |
| TPS54160AQRTJRQ1 | Wider 3.5–60 V input range; lower 1.5-A max output; different constant-frequency PWM control; 16-pin QFN package. | Preferred for ultra-wide input applications (e.g., dual-battery trucks) or where fixed-frequency EMI filtering is mandatory. | Choose TPS54160AQRTJRQ1 only if input extends below 6 V or above 42 V - LM25010Q1MH/NOPB excels in standard 12 V/24 V automotive systems. |
Compared with LM25011Q1MH/NOPB, LM25010Q1MH/NOPB provides tighter thermal margin at 1 A loads and lower quiescent current in light-load operation; versus TPS54160AQRTJRQ1, it offers superior transient response and simpler compensation-free design for mid-range automotive power rails.
Availability
LM25010Q1MH/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, infotainment subsystems, and telematics modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM25010Q1MH/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 designing analog ICs, embedded processors, and power management solutions for industrial, automotive, and consumer markets.
The LM25010Q1MH/NOPB belongs to TI's automotive-qualified DC/DC buck regulator product line, engineered specifically for robust, high-voltage power conversion in harsh vehicle environments without external compensation.
FAQ
What is the maximum input voltage rating for LM25010Q1MH/NOPB?
The absolute maximum input voltage (VIN to RTN) for LM25010Q1MH/NOPB is 45 V, with recommended operation from 6 V to 42 V. This range accommodates automotive battery transients such as load dump (up to 42 V) and cold-crank (down to 6 V), ensuring reliable operation in real-world vehicle electrical systems. Exceeding 45 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet.
Does LM25010Q1MH/NOPB require external compensation components?
No, LM25010Q1MH/NOPB does not require external compensation components due to its constant ON-time control architecture. This eliminates the need for external RC networks typically used in voltage-mode or current-mode controllers, reducing bill-of-materials count and layout complexity. Stability is inherently maintained across line and load variations, enabling faster load transient response than compensated topologies.
How is the switching frequency set on LM25010Q1MH/NOPB?
The switching frequency of LM25010Q1MH/NOPB is determined by the RON resistor connected between VIN and the RON/SD pin, along with input voltage. For example, with RON = 200 kΩ and VIN = 24 V, typical frequency is ~400 kHz. Equation 7 in the datasheet provides exact calculation: FS = VOUT × (VIN − 1.4 V) / [1.18×10⁻¹⁰ × (RON + 1.4 kΩ) × VIN]. Frequency is programmable from <100 kHz to 1 MHz.
What is the purpose of the SGND and RTN pins on LM25010Q1MH/NOPB?
SGND is the dedicated current-sense ground return for the internal 130 mΩ sense resistor, carrying recirculating inductor current during OFF-time. RTN is the main regulator ground return for all other internal circuitry. Separating these grounds prevents noise from high di/dt current paths from corrupting feedback and regulation accuracy - proper PCB layout requires separate traces routed to a single-point ground near the VCC and SS pins.
Is LM25010Q1MH/NOPB compatible with external VCC biasing?
Yes, LM25010Q1MH/NOPB supports external VCC biasing between 7.5 V and 14 V applied via a diode to the VCC pin. This disables the internal bias regulator when VIN exceeds 8.9 V, reducing power dissipation and improving efficiency in high-input-voltage applications. The internal diode from VCC to VIN ensures reverse polarity protection, and externally supplied VCC must remain below VIN to avoid backfeeding.
LM25010Q1MH/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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM25010Q1MH/NOPB FAQ
1.How can I place an order for LM25010Q1MH/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25010Q1MH/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 LM25010Q1MH/NOPB reliable?
The price and inventory of LM25010Q1MH/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25010Q1MH/NOPB is usually 5 days.
3.What payment methods are accepted for LM25010Q1MH/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25010Q1MH/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25010Q1MH/NOPB?
LM25010Q1MH/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25010Q1MH/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 LM25010Q1MH/NOPB?
For technical support, including LM25010Q1MH/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25010Q1MH/NOPB requirements.
6.How does Aetrix verify that LM25010Q1MH/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25010Q1MH/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 LM25010Q1MH/NOPB meets industry standards.
7.What is the process for return or replacement of LM25010Q1MH/NOPB?
All LM25010Q1MH/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25010Q1MH/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 LM25010Q1MH/NOPB part is unused and in its original packaging.
Return procedure for LM25010Q1MH/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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