My Inquiry
My Account
Texas Instruments LM5010SD/NOPB
- Part No.:
- LM5010SD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LM5010SD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,320
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM5010SD/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 across 8 V to 75 V input, delivers up to 1 A output, and supports >1 MHz switching in telecom and automotive post-regulation applications.
For engineers reviewing the LM5010SD/NOPB datasheet, LM5010SD/NOPB pinout, LM5010SD/NOPB application, or LM5010SD/NOPB equivalent, key selection considerations include its no-loop-compensation hysteretic control, thermal shutdown at 175°C, BST bootstrap capacitor requirement (0.022 µF), RON/SD programmable ON-time, and dual-package availability (WSON-10 and HTSSOP-14).
Technical Context
The LM5010SD/NOPB implements a constant ON-time control scheme where tON varies inversely with VIN-enabling stable operating frequency across line and load variations without external compensation. Its valley current limit detection monitors recirculating current via ISEN/SGND, triggering OFF-time extension when current exceeds 1.25 A.
Startup uses an internal 7-V regulator (VCC) with 5.8-V UVLO and 11.5-µA soft-start current source charging SS to 2.5 V. Gate drive relies on a floating bootstrap circuit (BST–SW) requiring ≥265 ns minimum OFF-time for capacitor recharge, and includes gate UVLO (3–5 V) and thermal shutdown (175°C/155°C hysteresis).
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 inputs directly without pre-regulation |
| Output Current | 1 A continuous - sufficient for point-of-load bias rails in industrial and communications systems |
| Current Limit Threshold | 1.25 A (valley detection) - enables overcurrent protection without additional sensing components |
| Feedback Reference | 2.5 V ±2% - sets output voltage via resistor divider (VOUT = 2.5 × (R1 + R2)/R2) |
| Switching Frequency | 100 kHz to >1 MHz - adjustable via RON resistor; remains stable across input and load changes |
| Thermal Shutdown | 175°C activation / 155°C recovery - protects against sustained overload or poor heatsinking |
| VCC Regulator | 7 V ±6%, 10 mA current limit - powers internal circuitry; supports external bias (7.5–14 V) to reduce dissipation |
Pinout & Package
LM5010SD/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 datasheet Rev G (April 2016).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 8–75 V; supplies startup regulator and high-side driver; internally diode-connected to VCC |
| SW | Switch node | Connects to inductor, freewheeling diode, and bootstrap capacitor; carries pulsed high-current switching waveform |
| BST | Bootstrap supply | Drives high-side gate via 0.022-µF ceramic capacitor to SW; requires ≥265 ns OFF-time for recharge |
| ISEN | Current sense input | Monitors recirculating current during OFF-time; threshold set at 1.25 A; connects externally to sense resistor and diode cathode |
| SGND | Sense ground return | Provides dedicated low-impedance path for current-sense return; isolated from RTN to avoid noise coupling |
| RTN | Circuit ground reference | Reference for internal logic, regulation comparators, and soft-start; separate from SGND to maintain accuracy |
| FB | Feedback input | Compares output voltage (via resistor divider) to 2.5-V internal reference; <5 nA bias current ensures high-precision regulation |
| SS | Soft-start control | Charged by 11.5-µA internal current source to 2.5 V; ramp controls output voltage rise time and limits inrush |
| RON/SD | ON-time programming & shutdown | Resistor from VIN sets tON; grounding disables regulator and discharges SS |
| VCC | Internal bias supply | 7-V regulated output; powers control circuitry; can be externally biased (7.5–14 V) to reduce thermal stress |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Hysteretic constant ON-time control eliminates external compensation network, simplifying design and improving transient response |
| Ultra-fast transient response | Minimum 265 ns OFF-time and valley current limiting enable rapid load-step recovery without output droop or overshoot |
| Integrated start-up regulator | Self-powered from VIN; delivers 7 V @ 10 mA to boot internal circuitry before main switching begins |
| Exposed thermal pad | Enhances heat dissipation in WSON package; reduces θJA to 36°C/W, enabling 1-A operation without forced air |
| Adjustable maximum duty cycle | Programmable via RON resistor; prevents runaway at low VIN by limiting tON during startup |
Applications
| Telecom Point-of-Load Regulator | Automotive Post-Regulator |
|---|---|
Use Scenario: Converts 48-V intermediate bus to 3.3-V or 5-V logic supply in base station RF modules and optical line cards. IC Role / Device Role / Timing Role: Primary buck controller managing high-efficiency DC-DC conversion with minimal external components. Use Value: Delivers 1-A output with >90% efficiency at full load while maintaining stable frequency across wide input transients typical in telecom environments. | Use Scenario: Steps down 42-V battery rail to 12-V or 5-V for infotainment head units and ADAS camera power domains. IC Role / Device Role / Timing Role: High-voltage buck regulator providing robust, thermally managed power under engine cranking and load-dump conditions. Use Value: Withstands 75-V transients and features thermal shutdown (175°C), ensuring reliability in under-hood temperature extremes. |
| Industrial Sensor Hub Supply | Non-Isolated Secondary Regulator |
Use Scenario: Powers multi-sensor nodes (temperature, pressure, vibration) in factory automation systems using 24-V or 48-V fieldbus inputs. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator delivering clean, regulated bias to analog front-ends and microcontrollers. Use Value: Precision 2.5-V reference and <5 nA FB bias current ensure stable, low-noise output critical for ADC reference and sensor signal conditioning. | Use Scenario: Provides isolated secondary-side regulation after a flyback or forward converter in medical or test equipment power supplies. IC Role / Device Role / Timing Role: Secondary-side synchronous buck controller eliminating need for optocoupler feedback loop compensation. Use Value: No loop compensation and fast transient response simplify secondary-side regulation while maintaining tight output tolerance across varying primary-side loads. |
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 |
|---|---|---|---|
| LM5164PWPR | Wider input range (3–100 V), lower IQ (26 µA), but requires external MOSFETs and loop compensation | Better suited for ultra-low-power standby modes; less integrated than LM5010SD/NOPB | Select when input extends below 8 V or quiescent current is critical; accept added complexity for higher integration flexibility |
| TPS54160DGQR | Lower max input (60 V), fixed 1.22-V reference, integrated compensation, but only 1.5-A peak current limit | Optimized for cost-sensitive industrial supplies with moderate voltage requirements | Choose when VIN ≤60 V and board space allows larger solution size; trade off integration for lower BOM count in mid-range designs |
Compared with LM5010SD/NOPB, LM5164PWPR offers broader input range and lower quiescent current but sacrifices integration and simplicity, while TPS54160DGQR provides easier compensation and higher peak current but lacks 75-V capability and thermal robustness for harsh environments.
Availability
LM5010SD/NOPB is available at Aetrix Electronics and suitable for telecom infrastructure, automotive electronics, industrial sensor hubs, and non-isolated secondary power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for LM5010SD/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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM5010 product line delivers high-voltage, integrated buck regulators for demanding applications including telecom, automotive, and industrial systems where input transients, thermal stress, and design simplicity are critical.
FAQ
What is the maximum input voltage rating for the LM5010SD/NOPB?
The LM5010SD/NOPB has an absolute maximum input voltage rating of 76 V, with recommended operating range from 8 V to 75 V. This makes it suitable for 48-V telecom and 42-V automotive bus applications, including transient conditions like load dump. Exceeding 76 V risks permanent damage per TI SNVS307G Absolute Maximum Ratings table.
Does the LM5010SD/NOPB require external loop compensation components?
No, the LM5010SD/NOPB does not require external loop compensation components. Its constant ON-time hysteretic control architecture eliminates the need for compensation networks, simplifying layout and improving load transient response. This is confirmed in the Features section and Detailed Description (Section 7.3.1) of the official LM5010SD/NOPB datasheet.
How is the switching frequency set on the LM5010SD/NOPB?
The switching frequency of the LM5010SD/NOPB is determined by the RON resistor value and input voltage (VIN), using the inverse relationship tON ∝ 1/VIN. Typical frequencies range from 100 kHz to >1 MHz depending on RON and VIN. Equation 5 in the datasheet gives tON = 1.18×10⁻¹⁰ × (RON + 1.4kΩ)/(VIN − 1.4 V) + 67 ns, and FS ≈ VOUT/(2 × L1 × 1.4 × 10²⁰)/(RL × RON²).
What is the purpose of the BST and SW pins on the LM5010SD/NOPB?
The BST and SW pins form the bootstrap gate-drive circuit for the internal N-channel high-side MOSFET. A 0.022-µF capacitor connects BST to SW. During each OFF-time, SW drops near −1 V, allowing the capacitor to recharge from VCC through an internal diode. This ensures sufficient gate voltage for full enhancement of the high-side switch, as specified in the Pin Functions and Feature Description sections of the LM5010SD/NOPB datasheet.
Can the LM5010SD/NOPB operate with an externally applied VCC bias?
Yes, the LM5010SD/NOPB supports external bias on the VCC pin within 7.5 V to 14 V. Applying voltage in this range disables the internal start-up regulator, reducing power dissipation and thermal stress-especially beneficial at high VIN. The internal diode isolates the external source from VIN, and this configuration is detailed in Figure 9 and Section 7.3.2 of the LM5010SD/NOPB datasheet.
LM5010SD/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):
- 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:
- 10-WSON (4x4)
LM5010SD/NOPB FAQ
1.How can I place an order for LM5010SD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5010SD/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 LM5010SD/NOPB reliable?
The price and inventory of LM5010SD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5010SD/NOPB is usually 5 days.
3.What payment methods are accepted for LM5010SD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5010SD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5010SD/NOPB?
LM5010SD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5010SD/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 LM5010SD/NOPB?
For technical support, including LM5010SD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5010SD/NOPB requirements.
6.How does Aetrix verify that LM5010SD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5010SD/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 LM5010SD/NOPB meets industry standards.
7.What is the process for return or replacement of LM5010SD/NOPB?
All LM5010SD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5010SD/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 LM5010SD/NOPB part is unused and in its original packaging.
Return procedure for LM5010SD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5010SD/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
