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Texas Instruments LM25007SDX/NOPB
- Part No.:
- LM25007SDX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM25007SDX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 500MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,203
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Product details
Overview
LM25007SDX/NOPB from Texas Instruments is a monolithic 42V, 0.5A step-down switching regulator with integrated 0.74Ω N-channel MOSFET, constant on-time control architecture, 2.5V ±2% feedback reference, and operation up to 800kHz - designed for distributed 12V/24V rail systems and automotive body electronics.
For engineers reviewing the LM25007SDX/NOPB datasheet, LM25007SDX/NOPB pinout, LM25007SDX/NOPB application, or LM25007SDX/NOPB equivalent, key selection considerations include input voltage range (9–42V), thermal performance in WSON-8 (θJA = 40°C/W), current limit off-time programmability via RCL, external shutdown capability, and VCC bias flexibility for light-load efficiency.
Technical Context
The LM25007SDX/NOPB employs a Vin-feed-forward constant on-time architecture that delivers ultra-fast transient response and near-constant switching frequency across load and line variations. Its on-time is set by an external resistor (RON/SD) and inversely proportional to VIN, enabling predictable frequency scaling from ~200kHz to 800kHz.
It integrates a high-side N-channel buck switch with bootstrap gate drive, intelligent cycle-by-cycle current limiting (725mA typical threshold), and a programmable off-time generator (RCL pin) whose duration decreases as output voltage rises - reducing foldback during partial overloads while ensuring robust short-circuit recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9V to 42V - supports wide industrial and automotive supply rails without pre-regulation. |
| Output Current | Guaranteed 0.5A - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Feedback Reference | 2.5V ±2% from −40°C to +125°C - enables precise output regulation from 2.5V to >30V using resistive divider. |
| Switch RDS(on) | 0.74Ω (typical) - reduces conduction loss and improves efficiency at mid-to-high loads. |
| Thermal Resistance θJA | 40°C/W (WSON-8 package) - enables higher power dissipation than VSSOP-8 (200°C/W), critical for compact designs. |
| Operating Frequency | Up to 800kHz - allows smaller magnetics and faster transient response; adjustable via RON resistor. |
| Shutdown Quiescent Current | 70–150µA - minimizes system standby power in battery-backed or always-on applications. |
Pinout & Package
LM25007SDX/NOPB is housed in an 8-pin thermally enhanced WSON package (NGT, 4mm × 4mm, 0.8mm max height) with exposed thermal pad. The pad must be soldered to PCB ground plane for optimal thermal and mechanical performance per TI SLUA271 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Connects to inductor, bootstrap capacitor, and freewheeling diode; carries high dv/dt and pulsed current. |
| BST | Bootstrap supply | Requires 0.01µF ceramic capacitor to SW; powers high-side gate driver during each switching cycle. |
| RCL | Current limit off-time programming | Resistor to RTN sets fault recovery time; off-time decreases as FB voltage rises to reduce foldback. |
| RTN | Circuit ground | Power ground reference for internal circuits and feedback comparator; separate from high-current return paths. |
| FB | Feedback input | Compares output voltage (via resistor divider) to 2.5V internal reference; regulates output with ±2% accuracy. |
| RON/SD | On-time set / shutdown control | Resistor to VIN sets on-time; pulling below 0.7V disables regulator and reduces ICC to <150µA. |
| VCC | Internal bias supply | 7V series regulator output; can be externally biased above 7V to disable internal regulator and improve light-load efficiency. |
| VIN | Main input supply | Accepts 9–42V; internal UVLO (6.3V) prevents startup until stable input is present. |
Key Features
| Feature | Design Value |
|---|---|
| No control loop compensation required | Constant on-time architecture eliminates need for external compensation network - simplifies design and reduces BOM count. |
| Vin feed-forward frequency stability | Maintains nearly constant switching frequency across input voltage and load changes - improves EMI predictability and filter design. |
| Intelligent current limit protection | Off-time inversely proportional to VOUT ensures faster recovery under partial overload vs. fixed off-time schemes. |
| External VCC bias option | Connecting ≥7V auxiliary source to VCC disables internal regulator - eliminates 0.7V dropout and boosts light-load efficiency. |
| Thermal shutdown with hysteresis | Triggers at 165°C with 25°C hysteresis - prevents thermal runaway while allowing safe restart after cooling. |
Applications
| Automotive Body Control Module | Industrial 24V Distributed Power Rail |
|---|---|
|
Use Scenario: Powering microcontroller, CAN transceiver, and door lock actuators from vehicle battery (9–16V nominal, up to 42V load dump). IC Role / Device Role: Primary 5V or 3.3V point-of-load regulator with high input voltage tolerance and thermal robustness. Use Value: Eliminates need for external pre-regulator; WSON-8's low θJA sustains 0.5A output at 85°C ambient without heatsink. |
Use Scenario: Converting 24V factory bus to 5V/12V for PLC I/O modules, sensors, and HMI displays. IC Role / Device Role: Compact, self-contained buck converter with minimal external components and no compensation. Use Value: Reduces solution size vs. controller+MOSFET approach; 800kHz operation enables ≤10µH inductors and small ceramic output caps. |
| HB-LED Constant Current Driver | 24VAC-to-DC Conversion for Smart Lighting |
|
Use Scenario: Driving strings of high-brightness LEDs from 12–42V DC input with analog dimming via FB pin. IC Role / Device Role: Regulated current source using feedback resistor network and current-sense amplifier emulation. Use Value: Leverages precise 2.5V reference and fast transient response to maintain LED current stability during PWM dimming transitions. |
Use Scenario: Rectified 24VAC (≈34V peak) powering smart bulb controllers and wireless modules. IC Role / Device Role: High-input-voltage buck regulator tolerant of AC line surges and zero-cross distortion. Use Value: Withstands 42V input transients without derating; RCL-programmable current limit protects against rectifier/inductor faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011SDX/NOPB | Higher 1.5A output current, same WSON-8 package, 65V max input, but requires external compensation. | Better suited for higher-power loads; less suitable where simplicity and minimal BOM are priorities. | Choose LM25011SDX/NOPB when >0.5A output or >42V input headroom is required; otherwise LM25007SDX/NOPB offers lower cost and simpler layout. |
| TPS54060DGQR | 60V input, 0.5A, integrated FET, but uses current-mode control with external compensation and larger SOIC-8 package. | Higher thermal resistance (θJA ≈ 90°C/W) limits power density; slower transient response than constant on-time architecture. | Prefer TPS54060DGQR only if 60V input rating is mandatory and board space permits larger footprint; LM25007SDX/NOPB delivers superior thermal performance in same area. |
Compared with LM25011SDX/NOPB and TPS54060DGQR, LM25007SDX/NOPB provides the best balance of compact WSON-8 packaging, uncompensated ease-of-use, and thermal efficiency for 0.5A, 42V-class applications - especially where rapid load transients and minimal external components are critical.
Availability
LM25007SDX/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, industrial 24V distributed power rails, and HB-LED driver designs requiring stable component supply and long-term production continuity.
Supply support for LM25007SDX/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The LM25007SDX/NOPB belongs to TI's high-voltage DC/DC regulator product line, engineered specifically for robust, compact, and easy-to-apply power conversion in automotive, industrial, and building automation systems.
FAQ
What is the maximum input voltage rating for LM25007SDX/NOPB?
The absolute maximum input voltage (VIN to RTN) for LM25007SDX/NOPB is 45V, with recommended operating range specified as 9V to 42V. This makes it suitable for automotive load-dump conditions and industrial 24V/48V systems. Exceeding 45V risks permanent damage per Absolute Maximum Ratings table in SNVS401C.
Does LM25007SDX/NOPB require external compensation components?
No, LM25007SDX/NOPB does not require external compensation components. Its constant on-time control architecture with Vin feed-forward eliminates the need for loop compensation networks, reducing design complexity and bill-of-materials count compared to voltage-mode or current-mode regulators.
How is the switching frequency set on LM25007SDX/NOPB?
The switching frequency of LM25007SDX/NOPB is determined by the on-time (set via RON resistor between RON/SD and VIN) and circuit operating mode. It scales inversely with VIN and ranges up to 800kHz. In continuous conduction mode, frequency remains relatively constant; in discontinuous mode, it varies with load. Equation Ton = 1.42×10⁻¹⁰ × RON / VIN applies.
Can LM25007SDX/NOPB operate with an output voltage below 2.5V?
No, LM25007SDX/NOPB cannot regulate below 2.5V because its internal feedback reference is fixed at 2.5V. The minimum output voltage equals the reference voltage, so outputs are programmable from 2.5V upward using the FB resistor divider. Attempting sub-2.5V operation results in unregulated or non-functional behavior.
What is the purpose of the exposed thermal pad on the WSON-8 package of LM25007SDX/NOPB?
The exposed thermal pad on LM25007SDX/NOPB's WSON-8 package must be soldered to the PCB ground plane to achieve the specified θJA of 40°C/W. It serves both thermal dissipation (reducing junction temperature rise under load) and mechanical anchoring. Omitting pad connection degrades thermal performance significantly - potentially exceeding safe junction temperature at full 0.5A load.
LM25007SDX/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)
LM25007SDX/NOPB FAQ
1.How can I place an order for LM25007SDX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25007SDX/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 LM25007SDX/NOPB reliable?
The price and inventory of LM25007SDX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25007SDX/NOPB is usually 5 days.
3.What payment methods are accepted for LM25007SDX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25007SDX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25007SDX/NOPB?
LM25007SDX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25007SDX/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 LM25007SDX/NOPB?
For technical support, including LM25007SDX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25007SDX/NOPB requirements.
6.How does Aetrix verify that LM25007SDX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25007SDX/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 LM25007SDX/NOPB meets industry standards.
7.What is the process for return or replacement of LM25007SDX/NOPB?
All LM25007SDX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25007SDX/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 LM25007SDX/NOPB part is unused and in its original packaging.
Return procedure for LM25007SDX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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