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Texas Instruments LM5010MH/NOPB
- Part No.:
- LM5010MH/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5010MH/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,039
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Product details
Overview
LM5010MH/NOPB from Texas Instruments is a high-voltage 1-A synchronous step-down switching regulator with integrated 75-V N-channel buck switch, valley current limit at 1.25 A, constant ON-time control architecture, and precision 2.5-V feedback reference. It operates from 8 V to 75 V input and delivers regulated output in telecom POL, automotive post-regulation, and industrial bias supply applications.
For engineers reviewing the LM5010MH/NOPB datasheet, LM5010MH/NOPB pinout, LM5010MH/NOPB application, or LM5010MH/NOPB equivalent, key selection criteria include input voltage range (8–75 V), valley current limit (1.25 A), thermal shutdown threshold (175°C), soft-start current source (11.5 µA), and BST-to-SW voltage rating (14 V).
Technical Context
The LM5010MH/NOPB implements a constant ON-time hysteretic control scheme where tON varies inversely with VIN-enabling stable switching frequency across line and load variations without loop compensation. Its valley current limit detection monitors recirculating current via ISEN/SGND path, triggering OFF-time extension when current exceeds 1.25 A.
Startup is managed by an internal 7-V regulator (VCC) with 5.8-V UVLO and 140-Ω output impedance; bootstrap gate drive (BST–SW) relies on a 0.022-µF capacitor recharged during each 265-ns minimum OFF-time. Thermal shutdown activates at 175°C with 20°C hysteresis, and overvoltage protection triggers at FB ≥ 2.9 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8 V to 75 V - supports 48-V telecom and 42-V automotive bus systems directly |
| Output Current | 1 A continuous - sufficient for point-of-load regulation of microcontrollers, FPGAs, and sensors |
| Valley Current Limit | 1.25 A ±0.25 A - sets peak inductor current threshold during discontinuous conduction mode |
| Feedback Reference | 2.5 V ±25 mV - enables precise output voltage setting via external resistor divider (R1/R2) |
| Switching Frequency | 100 kHz to >1 MHz - adjustable via RON resistor; remains stable under line/load transients |
| Thermal Shutdown | 175°C activation / 155°C recovery - protects against sustained overload or poor heatsinking |
| Soft-Start Current | 11.5 µA - charges external SS capacitor linearly to 2.5 V, controlling ramp rate of VOUT |
| BST–SW Rating | 14 V - defines maximum allowable voltage across bootstrap capacitor during switching |
Pinout & Package
LM5010MH/NOPB is packaged in a thermally enhanced 10-pin WSON (4.0 mm × 4.0 mm) with exposed thermal pad. Pin functions are validated per TI SNVS307G Rev G datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Internal drain of N-channel buck switch; connects to inductor, diode cathode, and BST capacitor |
| BST | Bootstrap supply | Charged from VCC through internal diode during OFF-time; powers high-side gate driver |
| VIN | Main input supply | Accepts 8–75 V; powers startup regulator and supplies energy to buck switch |
| VCC | Startup regulator output | Internally regulated 7 V ±6%; powers control circuitry and can be externally biased (7.5–14 V) |
| ISEN | Current sense return | Carries recirculating current out of SGND; used for valley current limit detection at 1.25 A |
| SGND | Sense ground | Low-impedance return path for current-sense resistor; isolated from RTN to avoid noise coupling |
| RTN | Circuit ground | Reference for internal logic, comparators, and UVLO circuits; separate from power return paths |
| FB | Feedback input | Compares output voltage (via R1/R2 divider) to 2.5-V reference; regulates VOUT with <5 nA bias current |
| SS | Soft-start control | Internally sourced 11.5-µA current charges external capacitor; resets to 0 V during fault or shutdown |
| RON/SD | ON-time programming / shutdown | Resistor from VIN sets tON; grounding disables regulator and discharges SS capacitor |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Hysteretic constant ON-time control eliminates need for external compensation network, reducing BOM count and layout sensitivity |
| Ultra-fast transient response | Minimum 265-ns OFF-time enables immediate reaction to load steps; maintains regulation without overshoot/undershoot |
| Integrated start-up regulator | Self-powered from VIN up to 75 V; eliminates need for auxiliary bias supply in high-input systems |
| Exposed thermal pad | Reduces RθJA to 36°C/W (WSON); enables 1-A operation at ambient temperatures up to 85°C with minimal copper area |
| Adjustable output voltage | Set via two-resistor divider; 2.5-V reference tolerance (±25 mV) ensures ≤1% output error across temperature |
| Valley current limiting | Detects recirculating current during OFF-time; prevents inductor saturation while allowing peak currents up to 3.5 A |
Applications
| Telecom Point-of-Load Regulator | Automotive Post-Regulator |
|---|---|
Use Scenario: Converts 48-V intermediate bus to 3.3 V or 5 V for FPGA I/O banks and SerDes power rails in base station equipment. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering regulated bias voltage; operates at fixed 500 kHz with <1% output ripple. Use Value: Eliminates need for external gate driver or compensation components; achieves >92% efficiency at full load with minimal board space. | Use Scenario: Steps down 42-V battery rail to 12 V for infotainment display backlight drivers and ADAS camera modules. IC Role / Device Role / Timing Role: High-reliability buck controller managing wide-input transients (load dump, cold crank); uses valley current limit for short-circuit robustness. Use Value: Withstands 75-V input surges; thermal shutdown (175°C) ensures safe operation in under-hood environments. |
| Industrial Sensor Bias Supply | Secondary High-Voltage Post-Regulator |
Use Scenario: Powers analog front-end ICs and precision ADCs in process control transmitters operating from 24–72 V field wiring. IC Role / Device Role / Timing Role: Isolated secondary-side regulator after flyback or forward converter; provides low-noise 5 V for signal conditioning. Use Value: Soft-start (11.5 µA) prevents inrush into capacitive loads; 2.5-V reference stability (<10 ppm/°C) ensures measurement accuracy. | Use Scenario: Regulates output of a 100-V intermediate bus to 15 V for op-amp bias and relay coil drivers in factory automation PLCs. IC Role / Device Role / Timing Role: Non-isolated buck stage following high-efficiency AC/DC front-end; handles high dV/dt transients on VIN. Use Value: BST–SW rating (14 V) and VIN–SW rating (76 V) ensure reliable gate drive under fast-rising input edges. |
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 |
|---|---|---|---|
| LM5115MH/NOPB | External MOSFET driver; no integrated switch; supports up to 100 V input; requires loop compensation | Used in higher-current (>3 A) or higher-efficiency designs where discrete FET optimization is needed | Select when output current exceeds 1.25 A or when thermal management requires separation of power switch and controller |
| TPS54160DGQ | Integrated 1.5-A switch; 3.5–60 V input; current-mode control; requires compensation; smaller 10-pin MSOP package | Targeted at lower-input industrial and embedded systems where 60-V max suffices and PCB area is constrained | Select when input stays below 60 V and board space is critical; not suitable for 75-V surge conditions |
Compared with LM5010MH/NOPB, LM5115MH/NOPB offers higher voltage headroom and design flexibility but adds complexity and component count, while TPS54160DGQ reduces footprint and cost for sub-60-V applications but lacks the 75-V ruggedness and valley current limit behavior essential for telecom and automotive use cases.
Availability
LM5010MH/NOPB is available at Aetrix Electronics and suitable for telecom point-of-load, automotive post-regulation, and industrial sensor bias supply applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM5010MH/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 headquartered in Dallas, Texas, designing and manufacturing analog, embedded processing, and digital signal processing technologies since 1930.
The LM5010MH/NOPB belongs to TI's high-voltage DC-DC regulator product line, engineered specifically for efficient, compact, and robust power conversion in 48-V telecom, 42-V automotive, and industrial high-input systems.
FAQ
What is the maximum input voltage rating for LM5010MH/NOPB?
The LM5010MH/NOPB has an absolute maximum input voltage rating of 76 V (VIN to GND), with recommended operation from 8 V to 75 V. This allows direct connection to 48-V telecom buses and 42-V automotive systems, including transient surges up to 75 V. Exceeding 76 V risks permanent damage per Absolute Maximum Ratings table in SNVS307G.
How does the valley current limit function in LM5010MH/NOPB?
The LM5010MH/NOPB detects valley current during the OFF-time by monitoring current flow from SGND through the internal sense resistor and out ISEN. When current exceeds 1.25 A ±0.25 A, the next ON-time is delayed until current falls below threshold. This prevents inductor saturation while permitting peak currents up to 3.5 A, enabling robust short-circuit protection without sacrificing transient response.
Can LM5010MH/NOPB operate without an external bootstrap capacitor?
No. The LM5010MH/NOPB requires a 0.022-µF ceramic capacitor between BST and SW pins to power the floating high-side gate driver. Without it, the internal N-channel switch cannot turn on reliably. The capacitor is recharged from VCC through an internal diode during each OFF-time, and the 265-ns minimum OFF-time ensures adequate recharge margin across all operating conditions.
What is the purpose of the RON/SD pin on LM5010MH/NOPB?
The RON/SD pin on LM5010MH/NOPB serves dual functions: connecting a resistor from VIN sets the ON-time (tON ∝ 1/VIN), enabling frequency stability; grounding the pin forces shutdown-disabling the buck switch, resetting the soft-start capacitor, and reducing input current to <200 µA. This pin enables both programmable timing and system-level enable/disable control in a single terminal.
Does LM5010MH/NOPB require external compensation components?
No. The LM5010MH/NOPB uses a constant ON-time hysteretic control architecture that inherently stabilizes the feedback loop without external compensation. This eliminates the need for type-II or type-III compensation networks, simplifying design, reducing component count, and improving immunity to layout parasitics-especially beneficial in high-frequency (>500 kHz) or space-constrained applications.
LM5010MH/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):
- 8V
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM5010MH/NOPB FAQ
1.How can I place an order for LM5010MH/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5010MH/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 LM5010MH/NOPB reliable?
The price and inventory of LM5010MH/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5010MH/NOPB is usually 5 days.
3.What payment methods are accepted for LM5010MH/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5010MH/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5010MH/NOPB?
LM5010MH/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5010MH/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 LM5010MH/NOPB?
For technical support, including LM5010MH/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5010MH/NOPB requirements.
6.How does Aetrix verify that LM5010MH/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5010MH/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 LM5010MH/NOPB meets industry standards.
7.What is the process for return or replacement of LM5010MH/NOPB?
All LM5010MH/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5010MH/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 LM5010MH/NOPB part is unused and in its original packaging.
Return procedure for LM5010MH/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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