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Texas Instruments LM5010ASD/NOPB
- Part No.:
- LM5010ASD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LM5010ASD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,929
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Product details
Overview
LM5010ASD/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, 6-V to 75-V input range, 2.5-V ±2% feedback reference, valley current limit at 1.25 A, and programmable switching frequency up to 1 MHz. It enables compact, low-component-count power supplies in automotive and telecom applications requiring robust input voltage tolerance.
For engineers reviewing the LM5010ASD/NOPB datasheet, LM5010ASD/NOPB pinout, LM5010ASD/NOPB application, or LM5010ASD/NOPB equivalent, key selection considerations include its constant ON-time control architecture (no loop compensation required), thermal shutdown at 175°C, exposed thermal pad for enhanced heat dissipation, and compatibility with external VCC biasing to reduce internal dissipation above 8.9 V.
Technical Context
The LM5010ASD/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; minimum OFF-time is fixed at 260 ns. Its valley current limit detection operates during the OFF-time via the ISEN–SGND path with 1.25-A threshold and 130-mΩ internal sense resistance.
It integrates a high-voltage bias regulator that tracks VIN below 8.9 V (±100 mV) and regulates VCC at 7 V above that threshold, with UVLO at 5.25 V and 180-mV hysteresis. The FB pin compares against a 2.5-V reference with <1-nA bias current, while an independent 2.9-V overvoltage comparator provides fast fault response.
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 with fast response during OFF-time sensing |
| Switching Frequency | Up to 1 MHz - allows use of small inductors and capacitors while maintaining EMI control |
| Buck Switch RDS(ON) | 0.35 Ω typical at TJ ≤125°C - minimizes conduction loss in high-input-voltage step-down conversion |
| Thermal Shutdown | 175°C with 20°C hysteresis - prevents catastrophic failure during sustained overload or poor heatsinking |
Pinout & Package
LM5010ASD/NOPB is housed in a thermally enhanced 10-pin WSON package (4.00 mm × 4.00 mm) with an exposed thermal pad for PCB-level heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Accepts 6–75 V; requires local bypass capacitor between VIN and RTN for stability and noise suppression |
| SW | Switching node | Internally connected to source of N-channel buck switch; connects to inductor, freewheeling diode, and bootstrap capacitor |
| BST | Bootstrap supply | Supplies gate drive voltage for high-side switch via external capacitor between BST and SW |
| ISEN | Current sense input | Receives recirculating inductor current during OFF-time; used for valley current limit detection |
| SGND | Sense ground | Return path for current-sense circuitry; must be routed separately from power ground to avoid noise coupling |
| RTN | Circuit ground | Ground return for all internal logic and regulation circuits except current-sense path |
| FB | Voltage feedback | Compares output voltage (via resistor divider) to 2.5-V reference; sets regulated output level |
| RON/SD | ON-time control / shutdown | Resistor-to-VIN sets tON; grounding disables regulator and discharges soft-start capacitor |
| SS | Soft-start | Internal 11.5-µA current source charges external capacitor to ramp reference and limit inrush current |
| VCC | Bias regulator output | Provides internal gate drive and control power; self-biased below 8.9 V, regulated at 7 V above |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Constant ON-time architecture eliminates need for external compensation network, reducing BOM count and design iteration time |
| Ultra-fast transient response | Direct feedback control with no phase lag from compensation enables rapid recovery from load steps without output droop or overshoot |
| Programmable soft-start | External capacitor on SS pin controls startup slew rate, preventing inrush current and ensuring controlled power-up sequencing |
| Integrated high-voltage bias regulator | Eliminates need for external LDO or charge pump; supports wide input range while enabling external VCC biasing to cut quiescent dissipation |
| Exposed thermal pad | Enables efficient heat transfer to PCB copper; reduces junction-to-board thermal resistance to 3.0°C/W in WSON package |
Applications
| Automotive Body Control Module | Industrial 48-V Telecom Power Supply |
|---|---|
Use Scenario: Regulating 48-V battery rail to 3.3 V for MCU, CAN transceiver, and sensor interfaces in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary non-isolated buck converter delivering stable 1-A output with high line regulation across cold-crank (6 V) to load-dump (75 V) conditions. Use Value: Eliminates need for pre-regulator stage; withstands automotive transients per ISO 7637-2; AEC-Q100 Grade 1 qualified version available (LM5010A-Q1). | Use Scenario: Generating 5 V/1 A from -48 V telecom bus for Ethernet PHYs, management controllers, and fan drivers. IC Role / Device Role / Timing Role: High-efficiency step-down regulator operating in continuous conduction mode with fixed-frequency behavior under full load. Use Value: Achieves >90% efficiency at 48 V → 5 V conversion; minimal external components reduce board area and cost vs. discrete solutions. |
| Off-Board LED Driver Power Stage | Ruggedized IoT Edge Node Power |
Use Scenario: Providing 12 V/1 A to drive constant-current LED driver ICs in outdoor signage or streetlight control units. IC Role / Device Role / Timing Role: Intermediate bus converter accepting wide-range DC input (e.g., solar + battery hybrid sources) and delivering clean, regulated 12 V. Use Value: Supports input dips to 6 V and surges to 75 V without dropout or latch-off; valley current limit prevents LED string short-circuit damage. | Use Scenario: Powering ARM Cortex-M based edge nodes deployed in factory automation or smart agriculture gateways with unregulated 24–60 V field wiring. IC Role / Device Role / Timing Role: Primary system power supply with thermal shutdown and overvoltage protection to ensure reliability in sealed enclosures. Use Value: Exposed thermal pad enables passive cooling in space-constrained designs; 175°C shutdown prevents thermal runaway during extended ambient temperature exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164PWPR | Wider 3–100 V input, 0.5-A output, integrated MOSFETs, 2.1-MHz max frequency | Lower output current; better suited for ultra-compact, low-power industrial sensors | Select when input exceeds 75 V or board space is critical; not drop-in due to different pinout and lower current rating |
| TPS54160DGQR | 6–60 V input, 1.5-A output, current-mode control, 2.5-V reference, no integrated high-side FET | Requires external high-side MOSFET; higher output current but larger solution size | Choose when higher peak load current (>1 A) or adjustable current limit is needed; layout differs significantly |
Compared with LM5010ASD/NOPB, LM5164PWPR offers broader input range but lower output capability and different control architecture, while TPS54160DGQR delivers higher current but demands external FET and compensation-neither is pin-compatible, making LM5010ASD/NOPB optimal for 1-A, 6–75 V applications prioritizing integration and thermal performance in WSON.
Availability
LM5010ASD/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, industrial 48-V telecom power supplies, ruggedized IoT edge nodes, and off-board LED driver power stages requiring stable component supply across long production lifecycles.
Supply support for LM5010ASD/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, with decades of experience in high-reliability power conversion ICs.
The LM5010A product line delivers high-voltage buck regulators optimized for automotive, industrial, and telecom systems where input transients, wide voltage range, and thermal resilience are critical design constraints.
FAQ
What is the maximum recommended input voltage for LM5010ASD/NOPB?
The absolute maximum input voltage for LM5010ASD/NOPB is 75 V, with recommended operation spanning 6 V to 75 V. Operation beyond 75 V risks permanent damage per Absolute Maximum Ratings. The device maintains stable regulation across this full range, including automotive load-dump events up to 75 V, and is validated for such conditions in the LM5010A-Q1 automotive variant.
Does LM5010ASD/NOPB require external compensation components?
No, LM5010ASD/NOPB does not require external compensation components. Its constant ON-time control architecture eliminates the need for loop compensation networks, simplifying design and improving transient response. Stability is inherently maintained across line and load variations without adding resistors or capacitors to the feedback path.
How is the switching frequency set on LM5010ASD/NOPB?
The switching frequency of LM5010ASD/NOPB is set indirectly via the RON resistor connected between VIN and the RON/SD pin. The ON-time (tON) is determined by VIN and RON, while the OFF-time is fixed at 260 ns; thus, fS ≈ 1/(tON + 260 ns). For example, with VIN = 48 V and RON = 200 kΩ, tON ≈ 340 ns and fS ≈ 1.7 MHz - though practical upper limit is 1 MHz per datasheet specification.
Can LM5010ASD/NOPB operate with an external bias applied to the VCC pin?
Yes, LM5010ASD/NOPB supports external biasing of the VCC pin with 7.5–14 V to disable the internal bias regulator and reduce 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 present, as confirmed in Section 7.3.2 of the datasheet.
What is the purpose of the SGND and RTN pins on LM5010ASD/NOPB?
LM5010ASD/NOPB separates sense ground (SGND) and circuit ground (RTN) to isolate the high-noise current-sense path from sensitive regulation circuitry. SGND carries recirculating inductor current during OFF-time for accurate valley current limit detection, while RTN serves as the reference for FB, SS, and internal logic. Routing them separately prevents noise coupling and ensures stable regulation and reliable current limiting.
LM5010ASD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WDFN Exposed Pad
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (4x4)
LM5010ASD/NOPB FAQ
1.How can I place an order for LM5010ASD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5010ASD/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 LM5010ASD/NOPB reliable?
The price and inventory of LM5010ASD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5010ASD/NOPB is usually 5 days.
3.What payment methods are accepted for LM5010ASD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5010ASD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5010ASD/NOPB?
LM5010ASD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5010ASD/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 LM5010ASD/NOPB?
For technical support, including LM5010ASD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5010ASD/NOPB requirements.
6.How does Aetrix verify that LM5010ASD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5010ASD/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 LM5010ASD/NOPB meets industry standards.
7.What is the process for return or replacement of LM5010ASD/NOPB?
All LM5010ASD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5010ASD/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 LM5010ASD/NOPB part is unused and in its original packaging.
Return procedure for LM5010ASD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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