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Texas Instruments LM5007SD
- Part No.:
- LM5007SD
- Manufacturer:
- Texas Instruments
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM5007SD.pdf
- Description:
- IC REG BUCK ADJ 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
LM5007SD from Texas Instruments is a 75-V input, 0.5-A synchronous buck DC/DC converter with integrated 80-V/0.7-A N-channel power MOSFET, adaptive constant-on-time (COT) control, and 2.5-V precision feedback reference. It operates from 9 V to 75 V input, delivers regulated output voltage via external resistor divider, and targets high-voltage post-regulation in 48-V automotive and telecom systems.
For engineers reviewing the LM5007SD datasheet, LM5007SD pinout, LM5007SD application, or LM5007SD equivalent, key selection considerations include its VIN range (9–75 V), integrated high-voltage switch, no-loop-compensation COT architecture, thermal shutdown with hysteresis, and dual-package availability (VSSOP-8/WSON-8) for layout flexibility and thermal performance.
Technical Context
The LM5007SD implements an adaptive constant-on-time (COT) control scheme where on-time is inversely proportional to VIN via external RON, enabling near-constant switching frequency across line and load variations. Its hysteretic regulation uses a 2.5-V internal reference at FB and terminates on-time when FB falls below threshold.
Current limiting employs an intelligent off-time generator (RCL-programmable) that scales forced off-time inversely with VOUT (via FB voltage), reducing foldback during overload while maintaining short-circuit protection. Protection includes VCC UVLO (6.3 V), gate-drive UVLO (4.5 V typ), thermal shutdown (165 °C), and minimum 300 ns off-time for BST capacitor recharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9 V to 75 V - supports direct connection to 12 V, 24 V, and 48 V industrial/automotive rails without pre-regulation. |
| Output Current | 0.5 A DC - sustained load capability enabled by integrated 0.7-A N-MOSFET with 1.34 Ω max RDS(on) at 0.2 A. |
| Feedback Reference | 2.5 V ±20 mV - precise internal reference enables accurate output voltage setting via external resistor divider. |
| Control Architecture | Adaptive COT - eliminates need for loop compensation, delivers ultra-fast transient response without stability tuning. |
| Switching Frequency | ~100–1000 kHz (load- and line-dependent) - remains relatively stable due to VIN feedforward on-time programming. |
| Quiescent Current | 675 µA typ - low operating ICC enables high efficiency at light loads in always-on systems. |
| Thermal Shutdown | 165 °C with 25 °C hysteresis - automatic recovery prevents latch-up and supports robust overtemperature handling. |
Pinout & Package
LM5007SD is available in thermally enhanced 8-pin WSON (NGT) package (4.00 mm × 4.00 mm) with exposed thermal pad bonded to GND. Pinout is identical to VSSOP-8 (DGK) variant but optimized for lower junction-to-board thermal resistance (15.1 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switching node | Power output of internal N-MOSFET; connects directly to LC filter inductor and external freewheeling diode cathode. |
| 2 BST | Bootstrap supply input | Drives high-side gate via external 0.01-µF ceramic capacitor between BST and SW; internal diode charges from VCC. |
| 3 RCL | Current limit off-time programming | Resistor to RTN sets intelligent off-time duration inversely proportional to FB voltage - reduces foldback during overload. |
| 4 RTN | Circuit ground | Reference return for FB, RON, RCL, and internal regulators; must be low-impedance connection to PCB ground plane. |
| 5 FB | Feedback input | Senses regulated output via resistor divider; compared to 2.5-V internal reference to control on-time and maintain regulation. |
| 6 RON | On-time programming / shutdown | Resistor to VIN sets on-time inversely proportional to VIN; voltage < 0.7 V disables converter and reduces ICC to ~100 µA. |
| 7 VCC | Internal bias regulator output | Nominally 7 V (6.6–7.4 V), powers gate driver and internal circuits; can be externally biased >7 V to disable internal regulator. |
| 8 VIN | Main input supply | Accepts 9–75 V unregulated input; requires local 0.1-µF ceramic decoupling to RTN for stability and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 80-V/0.7-A N-MOSFET | Eliminates external high-voltage switch and gate driver, reducing BOM count and layout complexity in 48-V systems. |
| Adaptive constant-on-time control | Enables stable operation without compensation components, cuts design time, and ensures fast load transient response (<1 µs). |
| Programmable current limit off-time | RCL resistor adjusts off-time from 2.65 µs (VFB = 2.3 V) to 17 µs (VFB = 0 V), minimizing output current foldback during overload. |
| VCC and gate-drive UVLO protection | Prevents erratic switching during startup or brownout: VCC UVLO = 6.3 V (206 mV hysteresis); gate UVLO = 4.5 V (400 mV hysteresis). |
| Thermal shutdown with auto-recovery | Shuts down at 165 °C and resumes operation after cooling by ≥25 °C, avoiding system latch-up in enclosed environments. |
Applications
| 48-V Automotive Post-Regulator | Industrial Telecom Power Supply |
|---|---|
|
Use Scenario: Regulating 48-V battery rail to 3.3 V or 5 V for infotainment ECUs and ADAS sensors in vehicles with wide input transients. IC Role / Device Role / Timing Role: Primary buck controller providing isolated, efficient, and transient-robust DC/DC conversion with integrated high-voltage switch. Use Value: Eliminates need for external 80-V MOSFET and driver; withstands load-dump spikes up to 75 V; maintains regulation during cold-crank (9 V). |
Use Scenario: Generating stable 12-V or 15-V bias from -48-V telecom rectified bus in base station power modules. IC Role / Device Role / Timing Role: Non-isolated step-down regulator delivering clean, low-noise output with minimal external components. Use Value: Adaptive COT control ensures fast response to burst-mode traffic loads; thermal shutdown protects against airflow-blocked enclosures. |
| High-Voltage Industrial Sensor Node | LED Driver Bias Supply |
|
Use Scenario: Powering 24-V industrial I/O modules from unregulated 36–72-V factory DC bus with strict EMI and size constraints. IC Role / Device Role / Timing Role: Compact, self-contained buck converter with integrated switch and bootstrap circuitry. Use Value: WSON-8 package provides 15.1 °C/W junction-to-board thermal resistance; 675 µA quiescent current extends standby life. |
Use Scenario: Providing constant-current LED string bias from 48-V lighting backbone in smart building systems. IC Role / Device Role / Timing Role: Pre-regulator feeding downstream constant-current LED driver ICs with tightly controlled voltage headroom. Use Value: 2.5-V reference accuracy (±20 mV) ensures stable current-setting voltage; programmable RON allows dynamic dimming via enable control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164PWPR | Wider VIN range (3–100 V), higher IOUT (1 A), integrated 100-V MOSFET, but requires external compensation and lacks RCL-based intelligent OCP. | Better suited for 100-V solar or PoE++ inputs; less optimal for cost-sensitive 48-V automotive where LM5007SD's simplicity and no-compensation advantage applies. | Select LM5007SD when design priority is minimal BOM, fast transient response, and proven 48-V automotive qualification. |
| TPS54060DGQR | Lower VIN max (60 V), lower IOUT (0.5 A), current-mode control with full compensation, no integrated high-voltage MOSFET (external FET required). | Requires external 60-V MOSFET and gate driver; better for designs needing adjustable frequency or tight current-limit tolerance over temperature. | Choose LM5007SD when board space, thermal performance, and integration level outweigh need for programmable frequency or external FET flexibility. |
Compared with LM5164PWPR and TPS54060DGQR, the LM5007SD offers superior integration for 48-V systems - combining 80-V switch, no-compensation COT control, and intelligent RCL-programmable OCP in a single 4-mm² WSON package - reducing component count, layout risk, and qualification effort.
Availability
LM5007SD is available at Aetrix Electronics and suitable for 48-V automotive post-regulation, industrial telecom power supplies, and high-voltage sensor node designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM5007SD 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 LM5007SD belongs to TI's high-voltage DC/DC converter product line, designed specifically for robust, compact, and easy-to-implement buck regulation in 12–48-V industrial, automotive, and telecom applications.
FAQ
What is the maximum input voltage rating for the LM5007SD?
The LM5007SD has an absolute maximum input voltage (VIN to RTN) rating of 80 V, with recommended operating range from 9 V to 75 V. This allows safe operation across automotive load-dump transients and industrial 48-V bus variations. The integrated 80-V N-channel MOSFET and internal protection circuits ensure reliable performance up to the rated limit. Exceeding 75 V in continuous operation may reduce lifetime or trigger overvoltage shutdown.
How does the LM5007SD achieve stable regulation without external compensation components?
The LM5007SD uses an adaptive constant-on-time (COT) control architecture that inherently avoids loop instability. Regulation relies on comparing FB voltage to a 2.5-V internal reference and triggering fixed on-time pulses inversely proportional to VIN. Since the control loop has no poles introduced by external RC networks, no compensation is needed - simplifying design and improving transient response. This behavior is confirmed in Section 7.3.1 of the LM5007SD datasheet.
Can the LM5007SD be used in discontinuous conduction mode (DCM) at light loads?
Yes, the LM5007SD automatically operates in DCM at light loads, where inductor current ramps to zero each cycle. This reduces switching losses and maintains high efficiency below ~10% load. The minimum off-time is fixed at 300 ns to ensure BST capacitor recharge, and the COT architecture naturally transitions between DCM and CCM based on load and input conditions - no mode-select pins or configuration required.
What is the purpose of the RCL pin on the LM5007SD, and how is it configured?
The RCL pin on the LM5007SD programs the current-limit off-time duration using an external resistor to RTN. The off-time decreases as FB voltage increases - e.g., 17 µs at VFB = 0 V (short-circuit) down to 2.65 µs at VFB = 2.3 V (moderate overload). This intelligent scaling minimizes output current foldback and improves recovery time. A typical RCL value is 100 kΩ, yielding 17 µs off-time at short-circuit per Equation 5 in the LM5007SD datasheet.
Does the LM5007SD support remote shutdown, and what is the threshold voltage?
Yes, the LM5007SD supports remote shutdown via the RON pin. Pulling RON voltage below 0.7 V (typical, with 40 mV hysteresis) disables switching and reduces quiescent current to ~100 µA. This function is electrically distinct from the FB regulation path and allows clean system-level enable/disable control. The shutdown threshold is specified as 0.45–1.1 V rising, ensuring noise immunity in noisy automotive or industrial environments.
LM5007SD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 9V
- Voltage - Input (Max):
- 75V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 73V
- Current - Output:
- 500mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (4x4)
LM5007SD FAQ
1.How can I place an order for LM5007SD through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5007SD 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 LM5007SD reliable?
The price and inventory of LM5007SD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5007SD is usually 5 days.
3.What payment methods are accepted for LM5007SD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5007SD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5007SD?
LM5007SD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5007SD 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 LM5007SD?
For technical support, including LM5007SD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5007SD requirements.
6.How does Aetrix verify that LM5007SD is sourced from the original manufacturer or authorized distributors?
All LM5007SD 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 LM5007SD meets industry standards.
7.What is the process for return or replacement of LM5007SD?
All LM5007SD units undergo pre-shipment inspection (PSI). If there is an issue with LM5007SD, 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 LM5007SD part is unused and in its original packaging.
Return procedure for LM5007SD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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