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Texas Instruments LM5007SD/NOPB
- Part No.:
- LM5007SD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM5007SD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,642
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Product details
Overview
LM5007SD/NOPB 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, 2.5-V precision reference, and operation across 9 V to 75 V input range. It delivers regulated output in compact VSSOP-8 or WSON-8 packages for high-voltage post-regulation in automotive and telecom systems.
For engineers reviewing the LM5007SD/NOPB datasheet, LM5007SD/NOPB pinout, LM5007SD/NOPB application, or LM5007SD/NOPB equivalent, key selection criteria include input voltage range (9–75 V), integrated MOSFET RDS(on) (0.74 Ω typ), current limit threshold (725 mA typ), shutdown threshold (0.7 V), and thermal shutdown at 165 °C with 25 °C hysteresis.
Technical Context
The LM5007SD/NOPB implements an adaptive constant-on-time (COT) control architecture where on-time is inversely proportional to VIN via external RON resistor, enabling near-constant switching frequency across line and load variations without loop compensation. Its hysteretic regulation compares FB voltage against a 2.5-V internal reference to trigger switch activation.
Current limiting uses an intelligent off-time generator whose duration scales inversely with FB voltage - preset to 17 µs at VFB = 0 V (short-circuit) and reduced under partial overload - minimizing foldback while maintaining volt-second balance. Protection includes VCC and gate-drive UVLO, thermal shutdown with automatic recovery, and overvoltage detection at 2.875 V on FB.
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 - continuous load capability enabled by integrated 0.7-A MOSFET with 0.74 Ω RDS(on) at 25 °C. |
| Reference Voltage | 2.5 V ±20 mV - precise internal threshold for feedback regulation, enabling accurate output voltage setting via resistive divider. |
| Switching Control | Adaptive COT - eliminates need for external compensation components and provides ultra-fast transient response. |
| Current Limit | 725 mA typ - cycle-by-cycle protection with programmable off-time scaling vs. output voltage to reduce foldback. |
| Thermal Shutdown | 165 °C with 25 °C hysteresis - disables switch driver and forces low-power reset state to prevent junction damage. |
| Shutdown Threshold | 0.7 V rising - logic-level enable/disable control at RON pin reduces quiescent current to ~100 µA in shutdown mode. |
Pinout & Package
LM5007SD/NOPB is available in thermally enhanced 8-pin WSON package (4.00 mm × 4.00 mm) with exposed thermal pad bonded to GND. Pinout optimized for minimal parasitic inductance and simplified PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Power switching output connected to LC filter; carries pulsed inductor current and requires low-inductance routing. |
| BST | Bootstrap capacitor input | Drives high-side gate via external 0.01-µF ceramic capacitor between BST and SW; enables floating gate drive for N-MOSFET. |
| RCL | Current limit off-time programming | Sets variable off-time during overcurrent events using resistor to RTN; scales inversely with FB voltage to minimize foldback. |
| RTN | Circuit ground | Power and signal return path; must be low-impedance and tied directly to PCB ground plane. |
| FB | Feedback input | Connects to resistive divider from VOUT; compared to 2.5-V reference to regulate output voltage. |
| RON | On-time set / shutdown control | Resistor to VIN sets on-time inversely proportional to input voltage; pulled below 0.7 V to enter shutdown mode. |
| VCC | Internal bias regulator output | 7-V regulated supply for gate driver and control circuits; accepts auxiliary bias up to 14 V to reduce IC dissipation. |
| VIN | Main input supply | Accepts 9–75 V unregulated input; requires local 0.1-µF ceramic decoupling capacitor to RTN. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 80-V N-MOSFET | Eliminates external high-voltage switch and associated gate drive complexity while supporting 75-V max input. |
| No loop compensation required | Reduces BOM count and design iteration time by removing external compensation network needed in voltage-mode controllers. |
| Intelligent current limit | Off-time dynamically shortens as output voltage rises during overload, preserving higher output current than fixed-off-time schemes. |
| VCC undervoltage lockout | Prevents erratic operation by disabling controller until VCC reaches 6.3 V, with 206-mV hysteresis for clean startup. |
| Thermal shutdown with hysteresis | Automatically recovers after cooling by 25 °C, avoiding latch-up and enabling self-resetting fault protection. |
Applications
| 48-V Automotive Power Bus | Telecom Secondary Regulator |
|---|---|
Use Scenario: Step-down conversion from 48-V battery rail to 3.3-V or 5-V logic supplies in ADAS ECUs and infotainment modules. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable low-voltage power with fast transient response to handle burst-mode processor loads. Use Value: Integrated 80-V MOSFET and 75-V input rating eliminate need for external HV FET; adaptive COT ensures stable regulation during cold-crank (6.5 V) and load-dump (80 V) transients. | Use Scenario: Post-regulation of intermediate 12-V or 24-V bus derived from -48-V telecom rectifiers to generate 1.2-V or 1.8-V core supplies. IC Role / Device Role / Timing Role: High-efficiency, low-quiescent-current buck converter operating in DCM at light loads to maintain efficiency across wide dynamic range. Use Value: 500-µA typical operating current and shutdown current of 100 µA extend standby runtime; 2.5-V reference enables tight output tolerance (<±1%) over temperature. |
| Industrial Sensor Hub Power | High-Voltage IoT Gateway |
Use Scenario: Local regulation from 24-V or 36-V factory floor power to 3.3-V microcontroller and analog sensor supplies. IC Role / Device Role / Timing Role: Compact, robust DC/DC solution providing isolated-like reliability without optocoupler feedback complexity. Use Value: Thermal shutdown with hysteresis and VCC/gate-drive UVLO ensure safe operation in unventilated enclosures; WSON-8 package supports high-power density layouts. | Use Scenario: Powering wireless SoCs and RF front-ends from long-line 48-V PoE++ or solar-charged battery banks. IC Role / Device Role / Timing Role: Primary step-down regulator handling wide-input transients and EMI-sensitive RF subsystems. Use Value: Constant-frequency COT behavior minimizes conducted EMI; BST/SW bootstrap architecture avoids external charge pump, reducing component count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5008SD/NOPB | Higher 1-A output current rating; same 75-V input, COT control, and pinout; larger RDS(on) (0.9 Ω) and higher quiescent current (750 µA). | Preferred for >0.5-A loads requiring identical footprint and control scheme; less efficient at light loads due to higher ICC. | Select when output current demand exceeds 0.5 A but layout reuse and design continuity are critical. |
| TPS54060DGQ | 60-V max input; 0.5-A output; current-mode control with external compensation; no integrated bootstrap diode; requires external high-side driver. | Suitable for lower-input designs where loop tuning flexibility is prioritized over simplicity; lacks integrated BST diode and VCC regulator. | Choose when input stays ≤60 V and design requires adjustable frequency or slope compensation for noise-sensitive environments. |
Compared with LM5007SD/NOPB, LM5008SD/NOPB offers higher current capacity in identical packaging but trades off light-load efficiency, while TPS54060DGQ provides current-mode flexibility at the cost of increased external component count and reduced input voltage headroom.
Availability
LM5007SD/NOPB is available at Aetrix Electronics and suitable for 48-V automotive systems, telecom secondary regulation, and industrial sensor hub power requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM5007SD/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, embedded processing, and power management technologies, serving industrial, automotive, and communications markets.
The LM5007SD/NOPB belongs to TI's high-voltage DC/DC converter product line, designed specifically for simple, robust, and compact buck regulation from 9 V to 75 V inputs in space-constrained and thermally demanding applications.
FAQ
What is the maximum input voltage rating for the LM5007SD/NOPB?
The LM5007SD/NOPB has an absolute maximum input voltage rating of 80 V across VIN to RTN, with recommended operating range from 9 V to 75 V. This allows reliable operation in 48-V automotive and telecom systems experiencing load dump or line surges up to 80 V, provided external input filtering and clamping are implemented per TI design guidelines.
How does the LM5007SD/NOPB achieve constant switching frequency without compensation?
The LM5007SD/NOPB uses adaptive constant-on-time (COT) control where on-time is inversely proportional to VIN via the RON resistor. This feedforward mechanism maintains nearly constant frequency across input and load variations. The off-time ends when FB falls below the 2.5-V reference, eliminating the need for external loop compensation components while delivering ultra-fast transient response.
Can the LM5007SD/NOPB operate with zero load current?
No - the LM5007SD/NOPB requires a minimum load current of 1 mA to maintain stable operation. Below this level, the bootstrap capacitor may discharge during extended off-times, causing erratic switching or cycling. To meet this requirement, select feedback resistors that draw ≥1 mA at nominal VOUT, or add a small parallel load resistor if light-load operation is unavoidable.
What is the purpose of the RCL pin on the LM5007SD/NOPB?
The RCL pin on the LM5007SD/NOPB programs the off-time duration during current-limit events. A resistor from RCL to RTN sets a base off-time (17 µs at VFB = 0 V), which decreases linearly as FB voltage increases - enabling intelligent foldback reduction during partial overloads. This improves system robustness during short-circuits and transient overloads without sacrificing output current capability.
Does the LM5007SD/NOPB support external synchronization?
No - the LM5007SD/NOPB does not support external clock synchronization. Its adaptive COT architecture determines switching frequency autonomously based on VIN, RON, and load conditions. For synchronized multi-rail designs, consider TI's LM5115 or LM5143 families, which offer SYNC input capability and are pin-compatible with complementary high-voltage buck controllers.
LM5007SD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-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):
- 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/NOPB FAQ
1.How can I place an order for LM5007SD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5007SD/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 LM5007SD/NOPB reliable?
The price and inventory of LM5007SD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5007SD/NOPB is usually 5 days.
3.What payment methods are accepted for LM5007SD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5007SD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5007SD/NOPB?
LM5007SD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5007SD/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 LM5007SD/NOPB?
For technical support, including LM5007SD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5007SD/NOPB requirements.
6.How does Aetrix verify that LM5007SD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5007SD/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 LM5007SD/NOPB meets industry standards.
7.What is the process for return or replacement of LM5007SD/NOPB?
All LM5007SD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5007SD/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 LM5007SD/NOPB part is unused and in its original packaging.
Return procedure for LM5007SD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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