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Texas Instruments LM25007MM/NOPB
- Part No.:
- LM25007MM/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM25007MM/NOPB.pdf
- Description:
- IC REG BUCK ADJ 500MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:23,347
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Product details
Overview
LM25007MM/NOPB from Texas Instruments is a monolithic step-down switching regulator with integrated 0.74Ω N-channel MOSFET, delivering guaranteed 0.5A output current across 9V–42V input range, featuring constant on-time control with VIN feed-forward for ultra-fast transient response in 12VDC/24VDC distributed rail systems.
For engineers reviewing the LM25007MM/NOPB datasheet, LM25007MM/NOPB pinout, LM25007MM/NOPB application, or LM25007MM/NOPB equivalent, key selection considerations include its VSSOP-8 package thermal performance (θJA = 200°C/W), 2.5V ±2% feedback reference over −40°C to +125°C, and programmable 300ns–800kHz operating frequency via external RON resistor.
Technical Context
The LM25007MM/NOPB employs a constant on-time hysteretic control architecture where switch on-time is inversely proportional to VIN and set by an external resistor on RON/SD, enabling near-constant switching frequency across line and load variations. Its internal 7V series bias regulator powers gate drive circuitry and supports external VCC biasing to reduce dissipation.
Current limiting uses an intelligent off-time generator whose duration is inversely proportional to FB voltage and set by RCL, ensuring fault recovery scales with output voltage level. Protection includes cycle-by-cycle current limit (725mA typ), thermal shutdown at 165°C, and gate-drive UVLO (4.5V BST–SW).
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 | 0.5A guaranteed - 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 across temperature extremes. |
| Switch RDS(on) | 0.74Ω max - reduces conduction loss and improves efficiency at full load in compact layouts. |
| Operating Frequency | Up to 800kHz - allows smaller magnetics and faster transient response while maintaining EMI control. |
| Shutdown Current | 70–150µA - minimizes system standby power in battery-backed or energy-sensitive applications. |
| Thermal Shutdown | 165°C with 25°C hysteresis - provides robust overtemperature protection without latch-up. |
Pinout & Package
VSSOP-8 (DGK) package with exposed pad not present - thermally optimized for PCB copper area but lacks thermal pad; θJA = 200°C/W; footprint compatible with standard 0.65mm pitch SOIC-8 layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switching node | Connects to inductor, bootstrap capacitor, and freewheeling diode; carries high di/dt pulsed current. |
| 2 BST | Bootstrap supply | Drives high-side gate via external 0.01µF ceramic capacitor between BST and SW; requires low-ESR path. |
| 3 RCL | Current limit off-time programming | Resistor to RTN sets fault recovery time inversely proportional to VOUT; preset 17µs at short-circuit. |
| 4 RTN | Circuit ground | Power return for internal regulators and comparators; must be low-impedance connection to PCB ground plane. |
| 5 FB | Feedback input | Senses regulated output via resistive divider; 2.5V threshold triggers on-time pulse when below reference. |
| 6 RON/SD | On-time set / shutdown control | Resistor to VIN programs on-time; pulled below 0.7V to enter low-power shutdown mode (≈100µA ICC). |
| 7 VCC | Internal bias supply output | 7V regulated output powers gate driver; can be externally biased >7V to disable internal regulator and cut quiescent loss. |
| 8 VIN | Main input supply | Accepts 9–42V DC; requires local 0.1µF ceramic decoupling to RTN for stability and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| No control loop compensation required | Hysteretic constant on-time architecture eliminates external compensation network, reducing BOM count and layout sensitivity. |
| Intelligent current limit protection | Off-time dynamically scales with FB voltage - longer recovery during short-circuit, shorter during overload - minimizing foldback and improving restart behavior. |
| VIN feed-forward frequency stabilization | Switching frequency remains stable across 9–42V input and 0–0.5A load, simplifying EMI filter design and improving transient immunity. |
| External VCC bias capability | VCC pin accepts auxiliary ≥7V supply to disable internal 7V regulator, eliminating ~50mW dissipation at light loads and boosting efficiency. |
| Ultra-fast transient response | Sub-microsecond response to load steps due to direct FB-to-on-time triggering - maintains <±2% output deviation under 100mA/µs load transients. |
Applications
| Industrial Power Rails | Automotive Body Control |
|---|---|
|
Use Scenario: Converting 24V vehicle battery to 5V/3.3V for body control modules, door actuators, and lighting controllers. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, efficient, and fault-tolerant local power with thermal and current limiting. Use Value: Operates reliably across cold-crank (6.5V) to load-dump (42V) conditions; intelligent current limit prevents latch-up during motor stall events. |
Use Scenario: Powering telematics head units and infotainment subsystems from 12V/24V battery rails with minimal heatsinking. IC Role / Device Role / Timing Role: High-voltage step-down controller managing power sequencing and brownout protection for MCU peripherals. Use Value: 2.5V feedback accuracy over −40°C to +125°C ensures stable logic supply under hood temperature extremes. |
| HB-LED Constant Current Source | 24VAC System Conversion |
|
Use Scenario: Driving high-brightness LED strings in signage or architectural lighting using 24VDC bus with analog dimming. IC Role / Device Role / Timing Role: Buck controller configured in constant-current mode via sense-resistor feedback into FB pin. Use Value: Programmable 300ns minimum off-time enables stable operation at high duty cycles required for low-VF LED strings. |
Use Scenario: Rectified 24VAC (≈34V peak) powering industrial sensors and PLC I/O modules requiring clean 5V/12V DC. IC Role / Device Role / Timing Role: Input-tolerant primary regulator handling unregulated rectified AC-derived DC with surge resilience. Use Value: 42V absolute max VIN rating accommodates 34V peak + margin; no external TVS needed for typical 24VAC RMS applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM25011MM/NOPB | Higher 1.5A output current, wider 6.5–42V input range, same VSSOP-8 package but higher RDS(on) (0.22Ω vs 0.74Ω). | Better suited for higher-load applications; requires larger inductor and output capacitance. | Select when >0.5A continuous load or cold-crank (6.5V) support is required; not drop-in due to different RON scaling. |
| TPS54060DGQR | 60V input rating, 0.5A current, current-mode control (not constant on-time), 16-pin WQFN package with enable/PG pins. | Supports higher input surges; includes power-good flag and adjustable soft-start absent in LM25007MM/NOPB. | Choose for designs needing 60V tolerance or system-level monitoring; requires full schematic/layout revision due to pinout and control differences. |
Compared with LM25007MM/NOPB, LM25011MM/NOPB delivers higher current in identical packaging but trades off MOSFET conduction loss for drive capability, while TPS54060DGQR offers broader input range and monitoring features at the cost of increased complexity and footprint - neither is pin-compatible.
Availability
LM25007MM/NOPB is available at Aetrix Electronics and suitable for 12VDC distributed rail systems, automotive body electronics, and industrial sensor power supplies requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM25007MM/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 LM25007MM/NOPB belongs to TI's high-voltage buck regulator product line, designed specifically for cost-sensitive, space-constrained industrial and automotive applications requiring robust operation from 9V to 42V inputs without external compensation.
FAQ
What is the maximum input voltage rating for the LM25007MM/NOPB?
The LM25007MM/NOPB has an absolute maximum input voltage (VIN to RTN) rating of 45V, with recommended operating range from 9V to 42V. Exceeding 45V risks permanent damage. The device is commonly used in 24VDC and 24VAC-derived systems where peak rectified voltages approach 34V, leaving adequate margin for transients.
Does the LM25007MM/NOPB require external compensation components?
No, the LM25007MM/NOPB does not require external compensation components. Its constant on-time hysteretic control architecture eliminates the need for loop compensation networks, simplifying design and improving stability across input and load variations without tuning.
Can the LM25007MM/NOPB operate with an output voltage lower than 2.5V?
No, the LM25007MM/NOPB cannot regulate below 2.5V because its internal feedback reference is fixed at 2.5V. Output voltage is set by VOUT = 2.5 × (R3 + R4)/R4, so the minimum achievable output equals the reference voltage when R3 = 0 - i.e., 2.5V is the hard lower limit.
How is thermal performance affected by the VSSOP-8 package of the LM25007MM/NOPB?
The LM25007MM/NOPB in VSSOP-8 (DGK) package has a junction-to-ambient thermal resistance (θJA) of 200°C/W. This requires careful PCB copper area allocation - at least 200 mm² of 2-oz copper connected to RTN and VIN pins - to maintain safe junction temperatures under 0.5A load at 42V input.
What happens to the LM25007MM/NOPB during output short-circuit conditions?
During output short-circuit, the LM25007MM/NOPB activates cycle-by-cycle current limiting (trip at ≈725mA), then initiates a non-resettable off-time determined by RCL and FB voltage. At FB ≈ 0V (short), off-time is preset to 17µs, limiting average current and enabling controlled recovery without thermal runaway.
LM25007MM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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-VSSOP
LM25007MM/NOPB FAQ
1.How can I place an order for LM25007MM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25007MM/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 LM25007MM/NOPB reliable?
The price and inventory of LM25007MM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25007MM/NOPB is usually 5 days.
3.What payment methods are accepted for LM25007MM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25007MM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25007MM/NOPB?
LM25007MM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25007MM/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 LM25007MM/NOPB?
For technical support, including LM25007MM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25007MM/NOPB requirements.
6.How does Aetrix verify that LM25007MM/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25007MM/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 LM25007MM/NOPB meets industry standards.
7.What is the process for return or replacement of LM25007MM/NOPB?
All LM25007MM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25007MM/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 LM25007MM/NOPB part is unused and in its original packaging.
Return procedure for LM25007MM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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