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Texas Instruments LM5010AMHE/NOPB
- Part No.:
- LM5010AMHE/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5010AMHE/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,147
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Product details
Overview
LM5010AMHE/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, valley current limit of 1.25 A, and programmable switching frequency up to 1 MHz. It operates in constant ON-time mode, requires no loop compensation, and targets non-isolated telecom and automotive post-regulation applications.
For engineers reviewing the LM5010AMHE/NOPB datasheet, LM5010AMHE/NOPB pinout, LM5010AMHE/NOPB application, or LM5010AMHE/NOPB equivalent, key selection considerations include its wide-input capability, thermal shutdown at 175°C, 2.5-V ±2% feedback reference, programmable soft-start via SS pin, and compatibility with WSON-10 thermally enhanced package for high-power-density designs.
Technical Context
The LM5010AMHE/NOPB implements a constant ON-time control architecture where tON is inversely proportional to VIN and set by an external resistor on RON/SD, enabling nearly constant operating 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.
It integrates a high-voltage bias regulator that supplies VCC: tracking VIN below 8.9 V (±100 mV), regulating at 7 V above 8.9 V, with 15-mA current limit and 5.25-V UVLO. The bootstrap gate driver (BST–SW) supports floating high-side drive with 260-ns minimum OFF-time for capacitor recharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 75 V - enables direct connection to 48-V telecom or 42-V automotive bus without pre-regulation |
| Output Current | 1 A continuous - supports mid-power point-of-load conversion with thermal derating per RθJA = 36°C/W |
| Switching Frequency | Up to 1 MHz - allows compact magnetics and low output ripple with minimal EMI filtering |
| Current Limit Threshold | 1.25 A (typical) - sets peak inductor current limit during valley-sense OFF-time for overcurrent protection |
| Feedback Reference | 2.5 V ±2% - defines regulated output voltage accuracy via external resistor divider (R1/R2) |
| Soft-Start Current | 11.5 µA (typical) - charges external SS capacitor linearly to 2.5 V, controlling ramp rate of output voltage |
| Thermal Shutdown | 175°C (typical), 20°C hysteresis - disables switching and prevents permanent damage during sustained overload or poor heatsinking |
Pinout & Package
LM5010AMHE/NOPB is housed in a 10-pin WSON (DPR) package with 4.00 mm × 4.00 mm body size and exposed thermal pad for enhanced 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 | Provides gate drive voltage for high-side switch via external capacitor between BST and SW |
| VIN | Main input supply | Accepts 6–75 V DC; bypass capacitors must be placed adjacent to VIN and RTN pins |
| VCC | Bias regulator output | Supplies internal circuitry; self-biased (tracks VIN ≤8.9 V) or regulated at 7 V (VIN >8.9 V); requires ≥0.47 µF ceramic cap |
| ISEN | Current sense input | Monitors recirculating inductor current during OFF-time; triggers valley current limit when current exceeds 1.25 A |
| SGND | Sense ground return | Return path for current sense resistor; separate from power ground (RTN) to avoid noise coupling into regulation loop |
| RTN | Power ground | Ground return for all internal circuitry except current sense path; connects to system ground plane |
| FB | Feedback input | Compares output voltage (via resistor divider) to 2.5-V reference; regulates output with ±2% accuracy |
| SS | Soft-start control | Internal 11.5-µA current source ramps voltage to 2.5 V, controlling startup slew rate and limiting inrush current |
| RON/SD | ON-time programming / shutdown | Resistor to VIN sets tON; grounding disables regulator and forces SS to GND |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Constant ON-time architecture eliminates need for external compensation network, reducing BOM count and layout sensitivity |
| Ultra-fast transient response | Direct FB-to-switch control path enables sub-microsecond recovery from load steps without phase-margin tuning |
| Integrated 80-V N-channel buck switch | Reduces external component count and PCB area; rated for 75-V max input with RDS(ON) = 0.35 Ω (TJ ≤125°C) |
| Programmable soft-start | External capacitor on SS pin sets startup time; prevents output overshoot and limits inrush into bulk capacitance |
| Exposed thermal pad | Enables low-junction-to-board thermal resistance (RθJB = 13.2°C/W), critical for 1-A operation in compact WSON-10 footprint |
Applications
| Telecom Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Regulating 48-V telecom rack voltage down to 3.3 V or 5 V for FPGA, DSP, or interface ICs in base station equipment. IC Role / Device Role / Timing Role: Primary non-isolated step-down regulator delivering stable 1-A output with fast transient response to handle burst-mode digital loads. Use Value: Eliminates need for intermediate 12-V stage, improving system efficiency by ~3% and reducing board space versus two-stage solutions. | Use Scenario: Generating 5-V rail from 12-V or 42-V battery for microcontrollers, CAN transceivers, and sensor interfaces in vehicle body electronics. IC Role / Device Role / Timing Role: High-input buck converter with AEC-Q100 Grade 1 qualification (–40°C to 125°C ambient), supporting automotive cold-crank and load-dump conditions. Use Value: Withstands 75-V transients and includes thermal shutdown, enabling robust operation without external protection circuitry. |
| Industrial IoT Gateway | LED Driver Bias Supply |
Use Scenario: Powering ARM-based edge gateway SoCs and wireless modules (Wi-Fi/LoRa) from wide-range industrial 24–60 V DC supply rails. IC Role / Device Role / Timing Role: Efficient 1-A point-of-load regulator with programmable frequency (up to 1 MHz) to avoid sensitive RF bands and simplify EMI filtering. Use Value: Constant frequency behavior under line/load variation simplifies compliance testing; WSON-10 package supports conformal coating for harsh environments. | Use Scenario: Providing stable bias voltage for constant-current LED driver ICs in architectural or signage lighting systems powered from 48-V PoE or battery banks. IC Role / Device Role / Timing Role: Secondary-side post-regulator ensuring precise 5-V or 12-V reference for LED current sensing and PWM dimming circuits. Use Value: 2.5-V ±2% feedback reference and ultra-low FB bias current (<1 nA) maintain tight output regulation despite temperature drift in LED thermal management loops. |
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 |
|---|---|---|---|
| LM5017MHE/NOPB | Same WSON-10 package, but 100-V input rating, 0.5-A output, and fixed 650-kHz frequency; lacks programmable soft-start | Targeted at higher-input, lower-current applications where 100-V surge immunity is mandatory | Select when input may exceed 75 V or when fixed frequency simplifies EMI design; not suitable for 1-A loads |
| TPS54160DGQ | 60-V max input, 1.5-A output, current-mode control, adjustable frequency (100 kHz–2.5 MHz), no integrated high-side switch | Requires external MOSFET; better suited for designs needing higher output current or tighter current-limit accuracy | Choose when flexibility in MOSFET selection or higher peak current is needed; adds complexity and board area |
Compared with LM5017MHE/NOPB, LM5010AMHE/NOPB delivers higher output current and programmable frequency but lower input voltage margin; versus TPS54160DGQ, it reduces external component count and layout effort at the cost of fixed topology and lower max input.
Availability
LM5010AMHE/NOPB is available at Aetrix Electronics and suitable for telecom power supplies, automotive body control modules, and industrial IoT gateways requiring stable component supply with long-term manufacturability and automotive-grade reliability.
Supply support for LM5010AMHE/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, specializing in analog, embedded processing, and power management ICs with broad industrial, automotive, and communications market focus.
The LM5010A product line delivers high-voltage buck regulators optimized for simplicity, efficiency, and ruggedness in 48-V telecom and 42-V automotive power systems-designed to replace multi-stage converters with single-chip solutions.
FAQ
What is the maximum input voltage rating for LM5010AMHE/NOPB?
The LM5010AMHE/NOPB has an absolute maximum input voltage (VIN to RTN) rating of 76 V, with recommended operating range from 6 V to 75 V. Exceeding 75 V during normal operation risks violating safe operating area limits; transient spikes up to 76 V are tolerated briefly per absolute maximum ratings, but sustained operation above 75 V is not advised. Always verify input transient protection in automotive or industrial environments where load dump can reach 60–80 V.
Does LM5010AMHE/NOPB require external compensation components?
No, LM5010AMHE/NOPB does not require external compensation components due to its constant ON-time control architecture. The regulation loop stability is inherent to the topology-output voltage is compared directly to the 2.5-V reference, and ON-time is adjusted per cycle without feedback loop phase-margin dependencies. This eliminates compensation capacitors and resistors, simplifying design and improving transient response predictability across input and load variations.
How is the switching frequency programmed on LM5010AMHE/NOPB?
The switching frequency of LM5010AMHE/NOPB is programmed indirectly via the RON resistor connected between VIN and the RON/SD pin. The ON-time (tON) is determined by VIN and RON using tON = 1.18×10⁻¹⁰ × (RON + 1.4 kΩ) / (VIN − 1.4 V) + 67 ns. Since tOFF is fixed at 260 ns, frequency varies with VIN and RON. For example, with RON = 200 kΩ and VIN = 48 V, typical fS ≈ 400 kHz. Full calculation guidance is provided in Section 7.3.5 of the LM5010A datasheet.
What is the purpose of the SGND and RTN pins on LM5010AMHE/NOPB?
LM5010AMHE/NOPB separates sense ground (SGND) from power ground (RTN) to prevent noise from high di/dt recirculating current from corrupting the precision current-sense and feedback paths. SGND carries only the valley current sense return from the internal 130-mΩ resistor, while RTN serves as the main ground return for all other internal circuitry. Proper PCB layout requires routing SGND directly to the ISEN pin and keeping it isolated from noisy power planes-this separation ensures accurate 1.25-A current limit detection and stable 2.5-V feedback regulation.
Can LM5010AMHE/NOPB be used in automotive applications?
Yes, LM5010AMHE/NOPB is qualified for automotive use as part of the LM5010A-Q1 family (AEC-Q100 Grade 1: –40°C to 125°C ambient). While the LM5010AMHE/NOPB itself is the commercial-grade variant, it shares identical electrical specifications, pinout, and WSON-10 package with the Q1 version. For production automotive systems, TI recommends LM5010AQ0RGQR (Grade 0) or LM5010AQ1RGQR (Grade 1); however, LM5010AMHE/NOPB is widely used in automotive prototyping, infotainment accessories, and non-safety-critical body electronics where full AEC-Q100 certification is not mandated.
LM5010AMHE/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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM5010AMHE/NOPB FAQ
1.How can I place an order for LM5010AMHE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5010AMHE/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 LM5010AMHE/NOPB reliable?
The price and inventory of LM5010AMHE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5010AMHE/NOPB is usually 5 days.
3.What payment methods are accepted for LM5010AMHE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5010AMHE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5010AMHE/NOPB?
LM5010AMHE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5010AMHE/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 LM5010AMHE/NOPB?
For technical support, including LM5010AMHE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5010AMHE/NOPB requirements.
6.How does Aetrix verify that LM5010AMHE/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5010AMHE/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 LM5010AMHE/NOPB meets industry standards.
7.What is the process for return or replacement of LM5010AMHE/NOPB?
All LM5010AMHE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5010AMHE/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 LM5010AMHE/NOPB part is unused and in its original packaging.
Return procedure for LM5010AMHE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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