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Texas Instruments LM5010AQ1MHX/NOPB
- Part No.:
- LM5010AQ1MHX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5010AQ1MHX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,549
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Product details
Overview
LM5010AQ1MHX/NOPB from Texas Instruments is an automotive-grade, high-voltage 1-A synchronous step-down DC/DC switching regulator with integrated 80-V N-channel buck switch, 6 V to 75 V input range, 2.5 V ±2% feedback reference, valley current limit of 1.25 A, and programmable switching frequency up to 1 MHz. It operates in constant ON-time mode for fast transient response and is used in 48-V telecom and 42-V automotive power bus regulation.
For engineers reviewing the LM5010AQ1MHX/NOPB datasheet, LM5010AQ1MHX/NOPB pinout, LM5010AQ1MHX/NOPB application, or LM5010AQ1MHX/NOPB equivalent, key selection considerations include AEC-Q100 Grade 1 qualification (–40°C to 125°C), thermal shutdown at 175°C, bootstrap gate drive architecture, no loop compensation requirement, and RON/SD pin programmable ON-time control.
Technical Context
The LM5010AQ1MHX/NOPB implements a constant ON-time control scheme where ON-time is inversely proportional to VIN and set by an external resistor on the RON/SD pin; OFF-time is fixed at 260 ns. Regulation uses a 2.5-V reference comparator with FB pin bias current <1 nA and overvoltage protection at 2.9 V.
It integrates a high-voltage bias regulator that tracks VIN below 8.9 V and regulates VCC to 7 V above that threshold, with internal UVLO at 5.25 V and gate drive UVLO at 1.7–4 V (BST–SW). Current limiting occurs during OFF-time via valley detection across an internal 130-mΩ sense resistor.
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. |
| Feedback Reference | 2.5 V ±2% - enables precise output voltage setting via external resistor divider (e.g., 3.3 V, 5 V, 12 V). |
| Valley Current Limit | 1.25 A typical - protects against overload and short-circuit while allowing peak currents up to 2 A. |
| Switching Frequency | Up to 1 MHz - permits use of small external inductors and capacitors, reducing solution size. |
| Thermal Shutdown | 175°C with 20°C hysteresis - automatically disables switching to prevent damage during sustained overload or poor heatsinking. |
| VCC Bias Regulator | 7 V regulated output (VIN > 8.9 V); tracks VIN below 8.9 V - eliminates need for external bias supply in most applications. |
| Soft-Start Current | 11.5 µA internal source - controls ramp rate of output voltage via external SS capacitor, limiting inrush current. |
Pinout & Package
LM5010AQ1MHX/NOPB is housed in a thermally enhanced 10-pin WSON package (4.0 mm × 4.0 mm) with exposed thermal pad for improved heat dissipation in high-power-density automotive and industrial designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 6–75 V; requires local bypass capacitor to RTN for EMI suppression and transient current delivery. |
| SW | Switching node | Internally connected to buck switch source; connects to inductor, freewheeling diode, and bootstrap capacitor. |
| BST | Bootstrap supply | Connects external capacitor between BST and SW to enable high-side N-MOSFET gate drive during each OFF-time. |
| ISEN | Current sense input | Receives recirculating inductor current during OFF-time; used for valley current limit detection (1.25 A threshold). |
| SGND | Sense ground return | Provides dedicated low-impedance return path for current-sense resistor; must be routed separately from power ground. |
| RTN | Circuit ground | Reference return for internal control circuitry (excluding current sense path); connects to system ground plane. |
| FB | Voltage feedback input | Compares output voltage (via resistor divider) to 2.5-V internal reference; bias current <1 nA minimizes divider error. |
| SS | Soft-start control | Charged by internal 11.5-µA current source to 2.5 V; controls output voltage ramp rate and prevents startup overshoot. |
| RON/SD | ON-time programming & shutdown | Resistor-to-VIN sets ON-time; grounding disables regulator and discharges SS capacitor. |
| VCC | Bias regulator output | Supplies internal gate driver and logic; self-biased from VIN or externally powered (7.5–14 V) to reduce dissipation at high VIN. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation, enabling use in engine control units and ADAS modules. |
| 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 | Reduces external component count and PCB area versus controller-only solutions; RDS(on) = 0.35 Ω (typ) at TJ ≤125°C. |
| 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 output voltage overshoot during power-up. |
| Exposed thermal pad | Enables direct thermal coupling to PCB copper pour, lowering junction-to-board thermal resistance to 3.0°C/W (WSON package). |
Applications
| Automotive Engine Control Unit (ECU) | Industrial 48-V Telecom Power Supply |
|---|---|
Use Scenario: Regulating 12-V rail from 42-V battery system in gasoline/diesel engine management systems under cold-crank (6 V) and load-dump (75 V) conditions. IC Role / Device Role / Timing Role: Primary non-isolated buck converter providing stable 12-V supply to MCU, CAN transceivers, and analog front-ends. Use Value: AEC-Q100 qualification and 6–75 V input range ensure reliable operation across full automotive voltage transients without external protection circuitry. | Use Scenario: Generating 3.3-V or 5-V auxiliary rails from 48-V intermediate bus in optical line terminals and base station power systems. IC Role / Device Role / Timing Role: High-efficiency step-down regulator delivering up to 1 A with minimal external components and no compensation design effort. Use Value: Constant-frequency operation and ultra-fast transient response maintain tight output regulation during burst-mode data traffic loads. |
| Onboard Charger (OBC) Auxiliary Supply | Commercial Vehicle Telematics Module |
Use Scenario: Powering isolated gate drivers, microcontrollers, and communication interfaces inside EV onboard chargers operating from 200–450-V DC link via pre-regulator stage. IC Role / Device Role / Timing Role: Secondary-side post-regulator converting 12–24 V intermediate rail to clean 3.3-V logic supply. Use Value: Valley current limit and thermal shutdown protect against fault conditions during high-temperature OBC operation near power semiconductors. | Use Scenario: Providing robust 5-V supply to GPS receivers, cellular modems, and CAN controllers in heavy-duty truck telematics units exposed to wide temperature and vibration. IC Role / Device Role / Timing Role: Automotive-qualified DC/DC converter replacing discrete solutions to meet ISO 16750-2 electrical stress requirements. Use Value: Exposed thermal pad and HTSSOP-compatible WSON package support conduction cooling in sealed enclosures without heatsinks. |
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 | 4.5–65 V input, 1-A integrated FET, constant ON-time, but uses different pinout and lacks BST pin; requires external bootstrap diode. | Designed for lower VIN range and higher light-load efficiency; not rated for 75-V transients. | Select when input stays below 65 V and ultra-low quiescent current (<15 µA) is prioritized over 75-V surge tolerance. |
| TPS54160A-Q1 | 3.5–60 V input, 1.5-A current limit, current-mode control with compensation; no integrated high-side FET - requires external MOSFET. | Offers adjustable slope compensation and better EMI performance via spread-spectrum option; needs more external components. | Select when design requires programmable frequency synchronization or tighter output tolerance under varying line/load conditions. |
Compared with LM5010AQ1MHX/NOPB, LM5164QDDARQ1 trades 75-V capability for lower IQ and smaller solution size, while TPS54160A-Q1 provides greater control flexibility at the cost of increased BOM complexity and reduced integration.
Availability
LM5010AQ1MHX/NOPB is available at Aetrix Electronics and suitable for automotive engine control units, 48-V telecom power supplies, onboard charger auxiliary rails, and commercial vehicle telematics modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM5010AQ1MHX/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-Q1 product line delivers high-voltage, AEC-Q100-qualified buck regulators optimized for reliability in automotive subsystems such as body electronics, infotainment, and ADAS, where wide input range and thermal robustness are critical.
FAQ
What is the maximum input voltage rating for LM5010AQ1MHX/NOPB?
The LM5010AQ1MHX/NOPB has an absolute maximum input voltage rating of 75 V and is specified for continuous operation from 6 V to 75 V. This allows direct connection to automotive 42-V systems and telecom 48-V buses, including transient conditions like load dump per ISO 16750-2. Operation beyond 75 V risks permanent damage.
Does LM5010AQ1MHX/NOPB require external compensation components?
No, LM5010AQ1MHX/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. Stability is inherent to the topology and does not depend on output capacitor ESR or capacitance value.
How is the switching frequency set on LM5010AQ1MHX/NOPB?
The switching frequency of LM5010AQ1MHX/NOPB is set indirectly via the RON resistor connected between VIN and the RON/SD pin. ON-time varies inversely with VIN and linearly with RON value; typical range supports frequencies up to 1 MHz. Equation 7 in the datasheet provides exact calculation based on desired fS, VIN, and VOUT.
What is the purpose of the SGND and RTN pins on LM5010AQ1MHX/NOPB?
LM5010AQ1MHX/NOPB separates sense ground (SGND) and circuit ground (RTN) to isolate the high-accuracy current-sense path from noisy power return currents. SGND carries only the recirculating inductor current through the internal 130-mΩ sense resistor, while RTN serves as reference for all other internal circuitry. Proper separation minimizes measurement error and improves current limit accuracy.
Can LM5010AQ1MHX/NOPB be used with an external VCC supply?
Yes, LM5010AQ1MHX/NOPB supports external biasing of the VCC pin with a 7.5–14 V supply to disable the internal bias regulator, reducing power dissipation when VIN exceeds 8.9 V. An external diode must be used to prevent backfeed, and the internal VCC regulator automatically shuts off when external voltage is applied and exceeds its regulation threshold.
LM5010AQ1MHX/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):
- 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
LM5010AQ1MHX/NOPB FAQ
1.How can I place an order for LM5010AQ1MHX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5010AQ1MHX/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 LM5010AQ1MHX/NOPB reliable?
The price and inventory of LM5010AQ1MHX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5010AQ1MHX/NOPB is usually 5 days.
3.What payment methods are accepted for LM5010AQ1MHX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5010AQ1MHX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5010AQ1MHX/NOPB?
LM5010AQ1MHX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5010AQ1MHX/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 LM5010AQ1MHX/NOPB?
For technical support, including LM5010AQ1MHX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5010AQ1MHX/NOPB requirements.
6.How does Aetrix verify that LM5010AQ1MHX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5010AQ1MHX/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 LM5010AQ1MHX/NOPB meets industry standards.
7.What is the process for return or replacement of LM5010AQ1MHX/NOPB?
All LM5010AQ1MHX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5010AQ1MHX/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 LM5010AQ1MHX/NOPB part is unused and in its original packaging.
Return procedure for LM5010AQ1MHX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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