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Texas Instruments LM5010AMH/NOPB
- Part No.:
- LM5010AMH/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5010AMH/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,171
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Product details
Overview
LM5010AMH/NOPB from Texas Instruments is a high-voltage 1-A synchronous step-down switching regulator with integrated 80-V N-channel buck switch, valley current limit of 1.25 A, programmable switching frequency up to 1 MHz, and 2.5-V ±2% feedback reference. It operates across 6 V to 75 V input range and delivers regulated DC output for industrial power supplies and automotive post-regulation.
For engineers reviewing the LM5010AMH/NOPB datasheet, LM5010AMH/NOPB pinout, LM5010AMH/NOPB application, or LM5010AMH/NOPB equivalent, key selection considerations include its constant ON-time control architecture, no-loop-compensation design, thermal shutdown at 175°C, exposed thermal pad package, and compatibility with 48-V telecom and 42-V automotive bus systems.
Technical Context
The LM5010AMH/NOPB implements a constant ON-time regulation scheme where tON is inversely proportional to VIN, enabling nearly constant operating frequency across line and load variations without external loop compensation. Its valley current limit detection occurs during OFF-time via internal sense resistor (130 mΩ) and ISEN/SGND terminals.
It integrates a high-voltage bias regulator that tracks VIN below 8.9 V and regulates VCC at 7 V above that threshold, with UVLO at 5.25 V and gate drive UVLO at 1.7–4 V (BST–SW). The 260-ns minimum OFF-time ensures bootstrap capacitor recharge and supports up to 1-MHz operation with proper RON selection.
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 |
| Switching Frequency | Up to 1 MHz - enables compact magnetics and low-profile filter designs with minimal EMI impact |
| Current Limit Threshold | 1.25 A (typical) - provides robust overcurrent protection during short-circuit or overload conditions |
| Feedback Reference | 2.5 V ±2% - enables precise output voltage setting using standard resistor dividers (e.g., 2.5 × (R1+R2)/R2) |
| RDS(ON) | 0.35 Ω (typ, TJ ≤125°C) - minimizes conduction loss and improves efficiency at full load |
| Thermal Shutdown | 175°C with 20°C hysteresis - protects device during sustained overload or poor heatsinking |
| Soft-Start Current | 11.5 µA - controls ramp rate of output voltage via external SS capacitor to limit inrush current |
Pinout & Package
LM5010AMH/NOPB is housed in a thermally enhanced 10-pin WSON package (4.00 mm × 4.00 mm) with exposed thermal pad for improved heat dissipation. Pin numbering follows top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 6–75 V; requires local bypass capacitor to RTN for stability and noise suppression |
| SW | Switching node | Internally connected to buck switch source; connects to inductor, freewheeling diode, and bootstrap capacitor |
| BST | Bootstrap supply | Charged from VCC through internal diode during OFF-time; powers high-side gate driver |
| ISEN | Current sense input | Monitors recirculating inductor current during OFF-time; triggers valley current limit at 1.25 A |
| SGND | Sense ground return | Provides dedicated low-noise return path for current sense circuitry; must be separated from power ground |
| RTN | Circuit ground | Return for all internal circuitry except current sense; connects to system ground plane |
| FB | Feedback input | Compares output voltage divider to 2.5-V reference; sets regulated output voltage |
| SS | Soft-start control | Charged by internal 11.5-µA current source; delays full output voltage ramp to prevent inrush |
| RON/SD | ON-time programming & shutdown | Resistor from VIN sets tON; grounding disables regulator and discharges SS capacitor |
| VCC | Bias regulator output | Supplies internal logic and gate drive; self-biased up to 8.9 V, then regulated at 7 V |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Constant ON-time control eliminates need for external compensation network, reducing BOM count and layout complexity |
| Ultra-fast transient response | Direct feedback-to-switch timing enables sub-microsecond recovery from load steps without output droop |
| Integrated 80-V N-channel buck switch | Eliminates external MOSFET and driver, simplifying design and improving reliability in high-input applications |
| Programmable soft-start | Adjustable ramp time via external SS capacitor prevents inrush current and stabilizes startup under varying loads |
| Exposed thermal pad | Enables direct PCB copper pour connection for efficient heat transfer, supporting 1-A continuous operation at elevated ambient |
| Valley current limiting | Detects current at inductor valley during OFF-time, providing accurate overcurrent protection independent of ripple amplitude |
Applications
| Telecom Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Regulating 48-V telecom rack voltage to 3.3 V or 5 V for baseband processors and PHY ICs. IC Role / Device Role / Timing Role: Primary non-isolated step-down regulator delivering stable, low-noise DC power with fast transient response to digital loads. Use Value: Enables single-stage conversion from 48-V bus with >90% efficiency at 1-A load, eliminating intermediate pre-regulators and reducing board space. | Use Scenario: Providing 5-V rail for door module ECUs, seat controllers, and lighting drivers in 12-V/42-V dual-battery vehicles. IC Role / Device Role / Timing Role: Secondary-side post-regulator converting battery-derived 12–16 V to clean 5 V for MCU and CAN transceivers. Use Value: Withstands cold-crank (6 V) and load-dump (75 V) events per ISO 7637-2, ensuring uninterrupted operation without external protection circuitry. |
| Industrial Sensor Hub | LED Driver Bias Supply |
Use Scenario: Powering analog front-ends, ADCs, and wireless transceivers in distributed IIoT sensor nodes powered from 24-V factory bus. IC Role / Device Role / Timing Role: High-reliability buck converter supplying isolated or non-isolated 3.3-V logic rail with low quiescent current during sleep mode. Use Value: Achieves <100-µA shutdown current and 675–950-µA operating current, extending battery life in energy-harvested or wired-sensor deployments. | Use Scenario: Generating stable 12-V bias for constant-current LED driver ICs in commercial signage and architectural lighting. IC Role / Device Role / Timing Role: Pre-regulator feeding downstream linear or switching LED current sources with tight voltage tolerance. Use Value: Maintains ±2% output accuracy over temperature and line variation, preventing LED color shift and luminance drift due to supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5010MH/NOPB | Same pinout and electrical specs; lacks AEC-Q100 qualification and Grade 1/0 temperature rating | Not rated for automotive safety-critical systems; suitable for industrial/commercial use only | Select when automotive qualification is unnecessary and cost sensitivity is higher |
| LM5164QDDARQ1 | Wider 3–100 V input, 0.5-A output, integrated FET, but uses current-mode control requiring compensation | Lower output current; requires external compensation components; supports lower minimum input voltage | Choose when input may drop below 6 V or when tighter current limit tolerance is needed |
Compared with LM5010MH/NOPB, LM5010AMH/NOPB adds automotive qualification and extended temperature support without changing footprint or basic functionality; compared with LM5164QDDARQ1, it offers higher output current and simpler implementation but narrower input range and no sub-6-V operation.
Availability
LM5010AMH/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor hubs, and telecom power supplies requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.
Supply support for LM5010AMH/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 product line delivers high-voltage buck regulators optimized for rugged, high-efficiency DC-DC conversion in space-constrained applications where input transients and thermal performance are critical.
FAQ
What is the maximum recommended input voltage for LM5010AMH/NOPB?
The absolute maximum input voltage for LM5010AMH/NOPB is 75 V, with recommended operating range specified from 6 V to 75 V. Exceeding 75 V risks permanent damage per Absolute Maximum Ratings. In automotive applications, this allows direct connection to 12-V and 42-V systems including load-dump transients compliant with ISO 7637-2 Pulse 5a.
Does LM5010AMH/NOPB require external compensation components?
No, LM5010AMH/NOPB does not require external compensation components due to its constant ON-time control architecture. The regulation loop is inherently stable across line and load variations, eliminating the need for type-II or type-III compensation networks typically used in voltage-mode or current-mode controllers.
How is the switching frequency set on LM5010AMH/NOPB?
The switching frequency of LM5010AMH/NOPB is set by an external resistor (RON) connected between VIN and the RON/SD pin. The ON-time varies inversely with VIN, resulting in nearly constant frequency; typical values range from ~100 kHz to 1 MHz depending on RON value and input/output conditions as defined in Equation 7 of the datasheet.
What package type is used for LM5010AMH/NOPB?
LM5010AMH/NOPB uses the 10-pin WSON (DPR) package with 4.00 mm × 4.00 mm body size and exposed thermal pad. This thermally enhanced package enables efficient heat dissipation in high-power-density layouts and is RoHS-compliant with lead-free (NOPB) finish.
Can LM5010AMH/NOPB operate in discontinuous conduction mode (DCM)?
Yes, LM5010AMH/NOPB automatically transitions into discontinuous conduction mode at light loads. In DCM, the inductor current falls to zero during part of the OFF-time, reducing switching losses and maintaining high efficiency at low output currents-critical for battery-powered or standby-power-sensitive applications.
LM5010AMH/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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM5010AMH/NOPB FAQ
1.How can I place an order for LM5010AMH/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5010AMH/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 LM5010AMH/NOPB reliable?
The price and inventory of LM5010AMH/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5010AMH/NOPB is usually 5 days.
3.What payment methods are accepted for LM5010AMH/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5010AMH/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5010AMH/NOPB?
LM5010AMH/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5010AMH/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 LM5010AMH/NOPB?
For technical support, including LM5010AMH/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5010AMH/NOPB requirements.
6.How does Aetrix verify that LM5010AMH/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5010AMH/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 LM5010AMH/NOPB meets industry standards.
7.What is the process for return or replacement of LM5010AMH/NOPB?
All LM5010AMH/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5010AMH/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 LM5010AMH/NOPB part is unused and in its original packaging.
Return procedure for LM5010AMH/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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