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Texas Instruments LM5010AQ0MH/NOPB
- Part No.:
- LM5010AQ0MH/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5010AQ0MH/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,299
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Product details
Overview
LM5010AQ0MH/NOPB from Texas Instruments is a high-voltage 1-A synchronous step-down DC/DC switching regulator with integrated 80-V N-channel buck switch, valley current limit of 1.25 A, programmable switching frequency up to 1 MHz, and 2.5-V ±2% feedback reference. It operates across 6 V to 75 V input and delivers regulated output for automotive post-regulation and telecom bias supplies.
For engineers reviewing the LM5010AQ0MH/NOPB datasheet, LM5010AQ0MH/NOPB pinout, LM5010AQ0MH/NOPB application, or LM5010AQ0MH/NOPB equivalent, key selection criteria include input voltage range compatibility, thermal performance in WSON-10 package, valley current limit accuracy, soft-start programmability via SS pin, and functional safety compliance for Grade 1 automotive operation.
Technical Context
The LM5010AQ0MH/NOPB implements constant ON-time control with VIN-inverse timing, eliminating loop compensation while maintaining nearly constant frequency across line and load variations. Its valley current limit detection occurs during OFF-time using internal 130-mΩ sense resistor between ISEN and SGND.
Startup uses an internal 11.5-µA current source charging the SS capacitor to 2.5 V; regulation compares FB voltage against 2.5-V reference, while overvoltage protection triggers at 2.9 V. The integrated VCC bias regulator self-bypasses below 8.9 V and regulates at 7 V above that threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 75 V - supports direct connection to 48-V telecom and 42-V automotive buses without pre-regulation |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in harsh environments |
| Switching Frequency | Up to 1 MHz - enables compact magnetics and low-profile output filtering |
| Current Limit Threshold | 1.25 A (typical) - valley-detect architecture prevents false triggering during transient load steps |
| Feedback Reference | 2.5 V ±2% - enables precise output setting with standard resistor dividers; overvoltage clamp at 2.9 V adds fault protection |
| Thermal Shutdown | 175°C with 20°C hysteresis - protects against sustained overload or poor heatsinking in enclosed systems |
| RDS(ON) | 0.35 Ω (typ, TJ ≤125°C) - minimizes conduction loss in high-input-voltage, low-duty-cycle applications |
Pinout & Package
LM5010AQ0MH/NOPB is housed in a thermally enhanced 10-pin WSON package (4.00 mm × 4.00 mm) with exposed thermal pad for PCB-level heat dissipation. RθJA = 36°C/W and RθJC(bot) = 3°C/W confirm strong thermal coupling to the board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Internally connected to source of N-channel buck switch; connects externally to inductor, freewheeling diode, and bootstrap capacitor |
| BST | Bootstrap supply | Charged from VCC through internal diode during SW OFF-time; sustains gate drive for high-side N-FET |
| VIN | Main power input | Accepts 6–75 V; bypass capacitors must be placed adjacent to VIN and RTN pins for EMI suppression |
| VCC | Bias regulator output | Nominally 7 V when VIN > 8.9 V; tracks VIN below that; requires ≥0.47 µF ceramic capacitor near pin |
| ISEN | Current sense input | Monitors recirculating inductor current during OFF-time; threshold set by internal 130-mΩ resistor |
| SGND | Sense ground return | Separate ground path for current-sense circuitry to avoid noise coupling into regulation loop |
| RTN | Circuit ground | Reference for all internal circuitry except current sense; must be tied to system ground with low impedance |
| FB | Voltage feedback | Compares output divider voltage to 2.5-V reference; also feeds overvoltage comparator (2.9 V threshold) |
| SS | Soft-start control | Internal 11.5-µA current source ramps capacitor to 2.5 V; controls output rise time and limits inrush |
| RON/SD | ON-time programming / shutdown | Resistor from VIN sets ON-time; grounding disables regulator and discharges SS capacitor |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Constant ON-time architecture eliminates external compensation network, reducing BOM count and layout sensitivity |
| Integrated 80-V N-channel buck switch | Enables single-chip solution for high-input-voltage buck conversion without external MOSFET or driver |
| Programmable soft-start | External capacitor on SS pin allows adjustable startup ramp rate to prevent output overshoot and inrush stress |
| AEC-Q100 Grade 1 qualified | Rated for –40°C to 125°C ambient operation - validated for automotive infotainment, ADAS, and body electronics |
| Exposed thermal pad | Low RθJC(bot) = 3°C/W enables efficient heat transfer to PCB copper, supporting 1-A continuous operation in compact layouts |
Applications
| Automotive Infotainment Power Supply | Industrial 48-V Telecom Bias Rail |
|---|---|
Use Scenario: Powers display controller, audio codec, and CAN transceiver in vehicle head unit from 12-V or 42-V battery rail. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 3.3-V or 5-V bias to mixed-signal subsystems. Use Value: AEC-Q100 Grade 1 qualification ensures reliability under automotive temperature cycling and vibration; wide VIN accommodates cold-crank and load-dump transients. | Use Scenario: Generates 3.3-V or 5-V auxiliary supply for FPGA configuration, Ethernet PHY, and management MCU in telecom line cards. IC Role / Device Role / Timing Role: Secondary-side post-regulator stepping down intermediate 48-V bus to logic-level voltages. Use Value: 1-MHz max switching frequency allows small inductors and ceramic output caps; no loop compensation simplifies design validation for high-volume production. |
| Onboard Charger Auxiliary Supply | Heavy-Duty Vehicle Telematics Module |
Use Scenario: Provides isolated gate driver bias and MCU core voltage in EV onboard charger (OBC) auxiliary power stage. IC Role / Device Role / Timing Role: High-reliability buck converter operating from 400-V DC-link-derived 12-V intermediate rail. Use Value: 75-V absolute maximum VIN rating and thermal shutdown protect against transient overvoltage events common in OBC power stages. | Use Scenario: Supplies GPS module, cellular modem, and sensor fusion processor in Class 8 truck telematics gateway. IC Role / Device Role / Timing Role: Main system regulator handling wide-input-range operation across 9–32-V nominal truck battery. Use Value: Valley current limit and ultra-fast transient response maintain regulation during engine cranking dips and alternator load dump spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5010MH/NOPB | Non-automotive grade; same electrical specs but lacks AEC-Q100 qualification and Grade 1 thermal rating | Targeted for industrial/commercial use only; not suitable for automotive safety-critical modules | Select LM5010MH/NOPB only where automotive qualification is unnecessary and cost sensitivity is higher |
| LM5164QDDARQ1 | Wider 3–100-V input, 0.5-A output, integrated FET, but uses current-mode control requiring compensation | Supports lower minimum input (3 V) and higher max input (100 V); better for battery-fed or ultra-wide-input systems | Choose LM5164QDDARQ1 when input range extends below 6 V or exceeds 75 V, accepting added compensation complexity |
Compared with LM5010MH/NOPB, the LM5010AQ0MH/NOPB adds automotive qualification and extended junction temperature support; compared with LM5164QDDARQ1, it trades wider VIN and lower IOUT for simpler design, higher current capability, and elimination of loop compensation.
Availability
LM5010AQ0MH/NOPB is available at Aetrix Electronics and suitable for automotive infotainment, industrial 48-V telecom power, and heavy-duty vehicle telematics requiring stable component supply with long-term lifecycle assurance.
Supply support for LM5010AQ0MH/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 LM5010A product line delivers high-voltage buck regulators optimized for simplicity, reliability, and thermal efficiency in space-constrained, high-temperature environments such as automotive body electronics and telecom infrastructure.
FAQ
What is the maximum input voltage rating for the LM5010AQ0MH/NOPB?
The LM5010AQ0MH/NOPB has an absolute maximum input voltage rating of 75 V applied between VIN and RTN. Its recommended operating input range is 6 V to 75 V, enabling direct use with 48-V telecom and 42-V automotive buses. Exceeding 75 V risks permanent damage per Absolute Maximum Ratings table in the official datasheet.
Does the LM5010AQ0MH/NOPB require external loop compensation components?
No, the LM5010AQ0MH/NOPB does not require external loop compensation components. Its constant ON-time control architecture inherently provides stability and ultra-fast transient response without needing external resistors or capacitors in the feedback path - a key simplification confirmed in the Features and Detailed Description sections of the datasheet.
How is the switching frequency programmed on the LM5010AQ0MH/NOPB?
The switching frequency of the LM5010AQ0MH/NOPB is programmed indirectly via the RON resistor connected between VIN and the RON/SD pin. The ON-time varies inversely with VIN and linearly with RON value; typical frequency ranges from ~80 kHz to 1 MHz depending on RON selection and operating conditions. Equation 7 in the datasheet provides the exact calculation method.
What is the purpose of the separate SGND and RTN pins on the LM5010AQ0MH/NOPB?
The LM5010AQ0MH/NOPB separates SGND (sense ground) and RTN (circuit ground) to isolate high-noise recirculating current paths from the sensitive regulation circuitry. SGND carries the valley current sense return from the internal 130-mΩ resistor, while RTN serves as the reference for all other internal blocks. This separation prevents ground bounce from degrading feedback accuracy and current limit precision.
Is the LM5010AQ0MH/NOPB pin-compatible with the standard LM5010MH/NOPB?
Yes, the LM5010AQ0MH/NOPB is pin-compatible with the LM5010MH/NOPB. Both share identical 10-pin WSON package dimensions, pinout, and electrical interface. The Q0 suffix denotes AEC-Q100 Grade 1 qualification and extended temperature validation - no PCB layout changes are needed when upgrading from LM5010MH/NOPB to LM5010AQ0MH/NOPB for automotive designs.
LM5010AQ0MH/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):
- 75V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 70V
- Current - Output:
- 1A
- Frequency - Switching:
- 100kHz ~ 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM5010AQ0MH/NOPB FAQ
1.How can I place an order for LM5010AQ0MH/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5010AQ0MH/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 LM5010AQ0MH/NOPB reliable?
The price and inventory of LM5010AQ0MH/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5010AQ0MH/NOPB is usually 5 days.
3.What payment methods are accepted for LM5010AQ0MH/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5010AQ0MH/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5010AQ0MH/NOPB?
LM5010AQ0MH/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5010AQ0MH/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 LM5010AQ0MH/NOPB?
For technical support, including LM5010AQ0MH/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5010AQ0MH/NOPB requirements.
6.How does Aetrix verify that LM5010AQ0MH/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5010AQ0MH/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 LM5010AQ0MH/NOPB meets industry standards.
7.What is the process for return or replacement of LM5010AQ0MH/NOPB?
All LM5010AQ0MH/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5010AQ0MH/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 LM5010AQ0MH/NOPB part is unused and in its original packaging.
Return procedure for LM5010AQ0MH/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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