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Texas Instruments LM5010AQ1MH/NOPB
- Part No.:
- LM5010AQ1MH/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5010AQ1MH/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,023
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Product details
Overview
LM5010AQ1MH/NOPB from Texas Instruments is an automotive-grade, high-voltage 1-A synchronous step-down DC/DC regulator with integrated 80-V N-channel buck switch, valley current limit of 1.25 A, and programmable switching frequency up to 1 MHz. It operates from 6 V to 75 V input, delivers adjustable output voltage via 2.5-V ±2% feedback reference, and targets primary power conversion in 42-V automotive and 48-V telecom systems.
For engineers reviewing the LM5010AQ1MH/NOPB datasheet, LM5010AQ1MH/NOPB pinout, LM5010AQ1MH/NOPB application, or LM5010AQ1MH/NOPB equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (–40°C to 125°C ambient), constant ON-time control eliminating loop compensation, thermal shutdown at 175°C, and WSON-10 thermally enhanced package with exposed pad.
Technical Context
The LM5010AQ1MH/NOPB implements a constant ON-time regulation scheme where tON is inversely proportional to VIN and set by an external resistor on the RON/SD pin - enabling stable operation across wide line/load variations without external compensation. Its valley current limit detection occurs during the OFF-time via internal 130-mΩ sense resistor between ISEN and SGND, triggering cycle-by-cycle limiting at 1.25 A.
Integrated functions include a self-biasing 7-V VCC regulator with bypass threshold at 8.9 V, ultra-fast soft-start via 11.5-µA internal current source charging the SS pin capacitor, and dual comparators for regulation (2.5 V) and overvoltage protection (2.9 V). The 260-ns minimum OFF-time ensures reliable bootstrap capacitor recharge for the high-side gate driver.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 75 V - supports direct connection to 42-V automotive and 48-V telecom bus 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 designs while maintaining efficiency |
| Current Limit Threshold | 1.25 A (typical) - provides robust short-circuit protection with valley-sense accuracy |
| Feedback Reference | 2.5 V ±2% - enables precise output voltage setting with standard resistor dividers |
| Thermal Shutdown | 175°C with 20°C hysteresis - prevents catastrophic failure during overload or poor heatsinking |
| VCC Regulator Output | 7 V regulated (for VIN > 8.9 V) - powers internal gate driver and logic with low dropout behavior |
Pinout & Package
LM5010AQ1MH/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. Pin numbering follows top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Internally connected to source of N-channel buck switch; connects to inductor, freewheeling diode, and bootstrap capacitor |
| BST | Bootstrap supply | Charges external BST–SW capacitor during OFF-time via internal diode to sustain high-side gate drive |
| ISEN | Current sense input | Receives recirculating inductor current during OFF-time; used for valley current limit detection at 1.25 A |
| SGND | Sense ground | Return path for current sense resistor; isolated from power ground to avoid noise coupling into sensing path |
| RTN | Circuit ground | Main ground return for internal bias circuitry; separate from SGND to maintain regulation accuracy |
| FB | Feedback input | Compares output voltage divider ratio against 2.5-V reference; also feeds overvoltage comparator (2.9 V) |
| SS | Soft-start control | Internal 11.5-µA current source ramps voltage to 2.5 V, controlling output rise time and limiting inrush current |
| RON/SD | ON-time programming / shutdown | Resistor-to-VIN sets tON; grounding forces shutdown, disabling switch and clearing soft-start |
| VIN | Main input supply | Accepts 6–75 V directly; powers internal VCC regulator and high-voltage bias circuits |
| VCC | Bias supply output | Provides 7-V regulated supply for gate driver and control logic; bypassed with ≥0.47 µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation - meets automotive reliability and stress testing requirements |
| No loop compensation required | Constant ON-time architecture eliminates external compensation network - reduces BOM count and design iteration time |
| Integrated 80-V N-channel buck switch | Reduces external component count and layout complexity - enables single-chip buck solution up to 75-V input |
| Programmable soft-start | Adjustable rise time via external SS capacitor - prevents output overshoot and limits inrush into downstream capacitors |
| Exposed thermal pad | Enables direct thermal conduction to PCB copper - improves power handling and junction temperature margin under 1-A load |
Applications
| Automotive Body Control Module (BCM) | Industrial 48-V Telecom Power Supply |
|---|---|
Use Scenario: Powers MCU, CAN transceiver, and door-lock actuators from vehicle battery (9–16 V nominal, up to 75 V during load dump). IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 3.3 V or 5 V rail with fast transient response to pulsed actuator loads. Use Value: AEC-Q100 qualification ensures functional safety compliance; valley current limit protects against shorted outputs during connector faults. | Use Scenario: Generates +12 V secondary rail from 48-V intermediate bus in telecom base station power architecture. IC Role / Device Role / Timing Role: High-efficiency post-regulator operating at 500 kHz to minimize EMI and inductor size in space-constrained chassis. Use Value: Wide 6–75 V input range accommodates brownout and surge conditions; constant frequency simplifies EMI filter design. |
| Commercial Vehicle Telematics Unit | Off-Highway Equipment Display Power |
Use Scenario: Supplies 5 V to GPS module, cellular modem, and SD card interface in heavy-duty truck telematics gateway. IC Role / Device Role / Timing Role: Input-filter tolerant buck converter handling cold-crank (6 V) and jump-start (24 V) events without dropout. Use Value: Ultra-fast transient response maintains regulation during sudden modem transmit bursts; thermal shutdown prevents latch-up in sealed enclosures. | Use Scenario: Provides 3.3 V for TFT-LCD controller and touch screen interface in construction equipment HMI panel exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Automotive-qualified point-of-load regulator mounted near display, minimizing IR drop and noise coupling. Use Value: Exposed thermal pad allows direct mounting to metal chassis for passive cooling; 125°C ambient rating sustains operation near hot engine compartments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | Wider 3–100 V input, 0.6-A output, integrated FET, but requires external compensation | Lower output current; better suited for ultra-low-power remote sensors than BCM main rail | Select when input may dip below 6 V or when footprint must be minimized below 3 mm² |
| MAX20008AATP/V+T | 6–65 V input, 1.2-A output, AEC-Q100 Grade 0 (–40°C to 150°C), but no integrated bootstrap diode | Higher junction temp rating; requires external high-side driver components | Select when ambient exceeds 125°C or when system-level fault coverage demands Grade 0 qualification |
Compared with LM5010AQ1MH/NOPB, LM5164QDDARQ1 trades output current and compensation simplicity for broader input range and smaller package, while MAX20008AATP/V+T offers higher temperature capability at the cost of increased external component count and layout complexity.
Availability
LM5010AQ1MH/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, industrial 48-V telecom infrastructure, and commercial vehicle telematics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM5010AQ1MH/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 designing analog ICs, embedded processors, and digital signal solutions for industrial, automotive, and communications markets.
The LM5010A-Q1 product line delivers high-voltage DC/DC regulators optimized for automotive power systems - specifically engineered to replace discrete buck controllers in 12-V, 24-V, and 42-V vehicle architectures with integrated, qualified, and thermally robust solutions.
FAQ
What is the maximum allowable input voltage for LM5010AQ1MH/NOPB?
The absolute maximum input voltage rating for LM5010AQ1MH/NOPB is 76 V relative to RTN, but the recommended operating range is 6 V to 75 V. Operation above 75 V risks exceeding safe SOA limits of the internal 80-V N-channel switch and may trigger thermal shutdown or reduce long-term reliability. TI specifies 75 V as the upper limit for continuous operation under all conditions including transients.
Does LM5010AQ1MH/NOPB require external compensation components?
No, LM5010AQ1MH/NOPB does not require external compensation components. Its constant ON-time control architecture eliminates the need for traditional Type II or Type III compensation networks. Stability is inherent due to the fixed relationship between input voltage and ON-time, enabling immediate startup and ultra-fast load transient response without tuning.
How is the switching frequency programmed on LM5010AQ1MH/NOPB?
The switching frequency of LM5010AQ1MH/NOPB is programmed indirectly via the RON resistor connected between VIN and the RON/SD pin. The ON-time (tON) is calculated as tON = 1.18×10⁻¹⁰ × (RON + 1.4 kΩ) / (VIN − 1.4 V) + 67 ns. For continuous conduction mode, frequency is approximated by fS ≈ VOUT / (2 × L1 × 1.4 × 10²⁰ × RL × RON)², with practical range up to 1 MHz.
What is the purpose of the SGND and RTN pins on LM5010AQ1MH/NOPB?
LM5010AQ1MH/NOPB separates sense ground (SGND) from circuit ground (RTN) to isolate the current-sensing path from noisy power return currents. SGND carries only the recirculating inductor current through the internal 130-mΩ sense resistor during OFF-time, ensuring accurate valley current limit detection. RTN serves as the reference for all other internal circuitry except the current sense block, preventing ground bounce from degrading regulation accuracy.
Can LM5010AQ1MH/NOPB operate with an external VCC supply?
Yes, LM5010AQ1MH/NOPB supports external VCC biasing. Applying 7.5 V to 14 V to the VCC pin (via diode or LDO) disables the internal bias regulator, reducing power dissipation when VIN exceeds 8.9 V. This is especially useful in high-input-voltage applications (e.g., 72-V battery systems) where internal VCC regulation would otherwise dissipate excessive heat. The internal diode from VCC to VIN ensures external voltage must remain below VIN.
LM5010AQ1MH/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 ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM5010AQ1MH/NOPB FAQ
1.How can I place an order for LM5010AQ1MH/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5010AQ1MH/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 LM5010AQ1MH/NOPB reliable?
The price and inventory of LM5010AQ1MH/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5010AQ1MH/NOPB is usually 5 days.
3.What payment methods are accepted for LM5010AQ1MH/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5010AQ1MH/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5010AQ1MH/NOPB?
LM5010AQ1MH/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5010AQ1MH/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 LM5010AQ1MH/NOPB?
For technical support, including LM5010AQ1MH/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5010AQ1MH/NOPB requirements.
6.How does Aetrix verify that LM5010AQ1MH/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5010AQ1MH/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 LM5010AQ1MH/NOPB meets industry standards.
7.What is the process for return or replacement of LM5010AQ1MH/NOPB?
All LM5010AQ1MH/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5010AQ1MH/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 LM5010AQ1MH/NOPB part is unused and in its original packaging.
Return procedure for LM5010AQ1MH/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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