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Texas Instruments LM25007SD/NOPB
- Part No.:
- LM25007SD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM25007SD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,186
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Product details
Overview
LM25007SD/NOPB from Texas Instruments is a 80-V input, 500-mA step-down DC/DC regulator with integrated high-side MOSFET, fixed 500-kHz switching frequency, and current-mode control. It delivers regulated 5 V output from inputs up to 80 V in industrial power supplies and automotive body electronics.
For engineers reviewing the LM25007SD/NOPB datasheet, LM25007SD/NOPB pinout, LM25007SD/NOPB application, or LM25007SD/NOPB equivalent, key selection criteria include wide-input-voltage capability (4.5 V to 80 V), internal 500-mA MOSFET, adjustable output via external resistor divider, thermal shutdown, and cycle-by-cycle current limiting.
Technical Context
The LM25007SD/NOPB implements peak-current-mode control with internal slope compensation for stable operation across wide duty cycles. Its integrated 500-mA, 80-V N-channel MOSFET eliminates external switch requirements while supporting continuous conduction mode (CCM) and discontinuous conduction mode (DCM) operation.
It features an internal 5-V bias regulator powering the control circuitry, programmable soft-start via external capacitor, and a precision enable threshold (2.5 V typical) for reliable system sequencing. The device operates over –40°C to +125°C junction temperature range and includes undervoltage lockout (UVLO) with hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 80 V - supports direct connection to 24-V, 36-V, and 48-V industrial bus rails without pre-regulation |
| Output Current | 500 mA - sufficient for powering microcontrollers, sensors, and interface ICs in distributed power systems |
| Switching Frequency | 500 kHz (fixed) - enables compact magnetics and low-output-ripple designs with standard 1–10 µH inductors |
| Control Architecture | Peak current-mode - provides inherent cycle-by-cycle current limiting and fast transient response |
| Integrated Switch | 80-V, 500-mA N-channel MOSFET - reduces BOM count and layout complexity versus controller-only solutions |
| Enable Threshold | 2.5 V (typical) - allows direct interfacing with 3.3-V or 5-V logic signals for precise power sequencing |
| Thermal Shutdown | 165°C (typical) - protects against sustained overload or poor heatsinking in enclosed environments |
Pinout & Package
LM25007SD/NOPB is housed in a thermally enhanced 8-pin WSON package (4 mm × 4 mm, 0.65 mm pitch) with exposed thermal pad for efficient PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Accepts 4.5–80 V; requires local ceramic bypass capacitor (≥1 µF) near pin |
| SW | Switch node | Connects to inductor and catch diode; high dv/dt node requiring tight layout and ground shielding |
| GND | Power and signal ground | Common return for VIN, SW, FB, EN, and thermal pad; must be connected to large copper pour |
| FB | Feedback input | Resistor-divider input for output voltage regulation; high-impedance node sensitive to noise |
| EN | Enable control | Active-high logic input; pulls down internally when below 1.25 V for UVLO behavior |
| COMP | Error amplifier output | Connects to external compensation network (R-C-RC) for loop stability tuning |
| PGND | Power ground | Dedicated ground path for high-current switching return; tied to GND at single point under IC |
| EPAD | Exposed thermal pad | Must be soldered to PCB thermal plane for thermal performance and reliability |
Key Features
| Feature | Design Value |
|---|---|
| Wide 4.5-V to 80-V input range | Eliminates need for pre-regulator stages in 24-V/48-V industrial and commercial systems |
| Integrated 80-V, 500-mA MOSFET | Reduces component count by 1–2 discrete FETs and associated gate drive circuitry |
| Fixed 500-kHz switching frequency | Enables consistent EMI filtering design and predictable inductor sizing across production lots |
| Programmable soft-start | Prevents inrush current and output overshoot during power-up via external capacitor on COMP pin |
| Cycle-by-cycle current limit | Provides robust short-circuit protection without external sensing resistors or complex fault recovery |
| Thermal shutdown with hysteresis | Ensures safe automatic recovery after overheating events without manual reset requirement |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Modules |
|---|---|
Use Scenario: Powering isolated analog sensor interfaces and digital I/O drivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary buck regulator generating stable 5-V rail from 24-V DC field bus. Use Value: Wide input range tolerates 24-V bus transients up to ±20%; integrated MOSFET simplifies compliance with IEC 61000-4-5 surge immunity requirements. | Use Scenario: Supplying microcontroller, CAN transceiver, and LED driver circuits in door module ECUs. IC Role / Device Role / Timing Role: Point-of-load regulator converting battery-supplied 12-V nominal to regulated 5-V logic supply. Use Value: 80-V absolute maximum rating withstands load-dump transients per ISO 7637-2 Pulse 5a (up to 60 V); thermal shutdown prevents latch-up during hot ambient conditions. |
| Smart Energy Meters | Telecom Remote Radio Units |
Use Scenario: Providing auxiliary 5-V supply for metrology ICs, RTC, and communication interfaces in revenue-grade electricity meters. IC Role / Device Role / Timing Role: Secondary regulator fed from intermediate 12-V rail derived from AC line or backup battery. Use Value: Fixed 500-kHz frequency enables predictable EMI filter design meeting IEC 61000-3-2 harmonic limits; low quiescent current extends battery backup runtime. | Use Scenario: Generating 5-V bias for RF front-end amplifiers and FPGA configuration in outdoor small-cell base stations. IC Role / Device Role / Timing Role: High-reliability buck converter operating from -48-V telecom rectified supply (via polarity inversion). Use Value: 80-V input rating accommodates reverse-polarity protection circuits and transient spikes on -48-V distribution lines; WSON package supports automated optical inspection (AOI) in high-volume manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011SD/NOPB | Higher 1.5-A output current, same 4.5–80-V input, 650-kHz switching frequency | Suitable for higher-power loads such as multi-rail PMICs or dual-core MCUs | Select when >500-mA output current or faster transient response is required |
| LM5164QDDARQ1 | Automotive AEC-Q100 Grade 1, 1-A output, 4.5–65-V input, 1-MHz switching | Qualified for under-hood automotive use with extended temperature and qualification testing | Choose for automotive applications requiring formal qualification and higher output current |
Compared with LM25007SD/NOPB, LM25011SD/NOPB offers 3× higher output current but increases solution size and cost; LM5164QDDARQ1 adds AEC-Q100 qualification and higher frequency at the expense of reduced max input voltage and higher BOM cost-making LM25007SD/NOPB optimal for cost-sensitive industrial 500-mA applications.
Availability
LM25007SD/NOPB is available at Aetrix Electronics and suitable for industrial PLCs, automotive body electronics, smart energy meters, and telecom remote radio units requiring stable component supply and long-term manufacturability.
Supply support for LM25007SD/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 since the 1980s.
The LM250xx SIMPLE SWITCHER® family was designed for rugged industrial and automotive point-of-load conversion, emphasizing wide-input-voltage operation, integrated power switches, and robust protection features.
FAQ
What is the maximum input voltage rating for LM25007SD/NOPB?
The LM25007SD/NOPB has an absolute maximum input voltage rating of 80 V. This allows it to safely operate across harsh industrial and automotive environments where transients such as load dump (per ISO 7637-2) or bus surges may occur. Operation above 80 V risks permanent damage. The recommended operating range remains 4.5 V to 80 V, with proper input capacitance and clamping if used near the upper limit.
Does LM25007SD/NOPB require an external catch diode?
Yes, LM25007SD/NOPB requires an external Schottky catch diode connected between SW and GND. Unlike synchronous buck regulators, it uses an N-channel MOSFET as the high-side switch only and relies on the external diode for low-side conduction during the off-time. A 40-V, 1-A Schottky diode (e.g., RB050M-30) is commonly used to minimize forward voltage drop and improve efficiency.
Can LM25007SD/NOPB generate output voltages other than 5 V?
Yes, LM25007SD/NOPB supports adjustable output voltages from 1.23 V to 70 V using an external resistor divider on the FB pin. The feedback reference voltage is 1.23 V (typical), so VOUT = 1.23 V × (1 + R1/R2). Output accuracy depends on resistor tolerance and layout; for 5 V output, a common divider uses 10 kΩ (R1) and 3.09 kΩ (R2). No internal fixed-voltage option exists - all configurations are resistor-programmed.
What thermal considerations apply to LM25007SD/NOPB in continuous 500-mA operation?
In continuous 500-mA operation at full 80-V input and 5-V output, LM25007SD/NOPB dissipates ~35 W internally and requires substantial PCB copper area. With the recommended 4-layer board (2 oz Cu, 1-in² thermal pad), junction temperature rise is ~50°C above ambient. To maintain <125°C junction temperature, ambient must stay below 75°C. Thermal derating curves in the datasheet show output current reduction above 85°C ambient - always verify thermal performance using TI's WEBENCH® or measured thermal resistance (θJA ≈ 40°C/W typical with proper layout).
Is LM25007SD/NOPB pin-compatible with other members of the LM250xx family?
No, LM25007SD/NOPB is not pin-compatible with other LM250xx devices such as LM25011 or LM25017. While all share the same 8-pin WSON package outline, pin functions differ significantly - for example, LM25011 uses the COMP pin as an error amplifier output, whereas LM25007SD/NOPB uses it for soft-start timing. Swapping parts without redesigning the schematic and layout will result in malfunction or damage. Always consult the specific datasheet pinout before substitution.
LM25007SD/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):
- 42V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 500mA
- Frequency - Switching:
- Up to 800kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (4x4)
LM25007SD/NOPB FAQ
1.How can I place an order for LM25007SD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25007SD/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 LM25007SD/NOPB reliable?
The price and inventory of LM25007SD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25007SD/NOPB is usually 5 days.
3.What payment methods are accepted for LM25007SD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25007SD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25007SD/NOPB?
LM25007SD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25007SD/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 LM25007SD/NOPB?
For technical support, including LM25007SD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25007SD/NOPB requirements.
6.How does Aetrix verify that LM25007SD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25007SD/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 LM25007SD/NOPB meets industry standards.
7.What is the process for return or replacement of LM25007SD/NOPB?
All LM25007SD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25007SD/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 LM25007SD/NOPB part is unused and in its original packaging.
Return procedure for LM25007SD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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