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Texas Instruments LM25007MMX
- Part No.:
- LM25007MMX
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM25007MMX.pdf
- Description:
- IC REG BUCK ADJ 500MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,474
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Product details
Overview
LM25007MMX 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, and Vin feed-forward for near-constant frequency operation. It delivers regulated output from 2.5V to >30V across 9–42V input, supports up to 800kHz switching, and targets distributed power rails in industrial and automotive systems.
For engineers reviewing the LM25007MMX datasheet, LM25007MMX pinout, LM25007MMX application, or LM25007MMX equivalent, key selection considerations include its VSSOP-8 package thermal performance (θJA = 200°C/W), intelligent current limit with FB-dependent off-time, no external loop compensation requirement, and shutdown control via RON/SD pin.
Technical Context
The LM25007MMX implements a constant on-time hysteretic control scheme where on-time is inversely proportional to VIN and set by an external resistor on RON/SD, enabling stable operation across wide input and load variations. Its Vin feed-forward mechanism maintains operating frequency within ~10% variation over 9–42V input and 0–0.5A load.
Current limiting uses a non-resettable off-timer whose duration scales inversely with FB voltage - 17µs at FB = 0V (short-circuit) down to ~2.65µs at FB = 2.3V - ensuring faster recovery under partial overload. The internal 7V series regulator powers gate drive and can be bypassed by an external ≥7V supply on VCC to reduce dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9V to 42V - supports 12V/24VDC industrial rails and 24VAC rectified inputs without pre-regulation. |
| Output Current | Guaranteed 0.5A - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Switch RDS(on) | 0.74Ω (typ) - enables high efficiency at mid-load; reduces conduction loss versus discrete FET solutions. |
| Feedback Reference | 2.5V ±2% (−40°C to 125°C) - enables precise output setting with standard resistor dividers and stable regulation over full temp range. |
| Operating Frequency | Up to 800kHz - allows use of compact magnetics and low-ESR ceramic output capacitors. |
| Shutdown Current | 70–150µA - minimizes system standby power in battery-backed or energy-sensitive applications. |
| Thermal Shutdown | 165°C with 25°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
VSSOP-8 (DGK) package: 3.0mm × 3.0mm body, 0.65mm pitch, exposed thermal pad not present (WSON-8 has EP; VSSOP-8 does not). Designed for surface-mount assembly with standard reflow profile (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching Node | Connects to inductor, bootstrap capacitor (BST–SW), and external freewheeling diode - carries high di/dt pulsed current. |
| BST | Bootstrap Supply | Charged via internal diode from VCC during SW low phase; sustains high-side gate drive for integrated N-FET. |
| RCL | Current Limit Off-Time Set | Resistor-to-RTN sets fault recovery timing; off-time decreases as FB voltage rises - prevents foldback during overload. |
| RTN | Circuit Ground | Power return path for internal regulators and feedback comparator - must be low-impedance connection to PCB ground plane. |
| FB | Feedback Input | Senses output via resistor divider; internal 2.5V reference triggers switch ON when FB < 2.5V - enables adjustable output from 2.5V. |
| RON/SD | On-Time Set / Shutdown | Resistor-to-VIN sets on-time; pulled <0.7V disables regulator - dual-function pin simplifies enable/control circuitry. |
| VCC | Internal Bias Supply | 7V regulated output powers gate driver; can be externally boosted ≥7V to disable internal regulator and cut quiescent loss. |
| VIN | Main Input Supply | Accepts 9–42V DC; requires local 0.1µF ceramic decoupling to RTN - tolerant of transients common in automotive/industrial environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external loop compensation required | Constant on-time architecture eliminates need for Type-II/III compensators - reduces BOM count and layout sensitivity. |
| Ultra-fast transient response | On-time adjustment per cycle enables sub-microsecond load-step recovery - critical for FPGA core rails and real-time controllers. |
| Intelligent current limit protection | FB-scaled off-time ensures short-circuit protection with minimal voltage sag and rapid restart after fault clearance. |
| Vin feed-forward frequency stability | Maintains operating frequency within ±10% across full 9–42V input range - simplifies EMI filter design and noise prediction. |
| External VCC bias option | Connecting ≥7V auxiliary supply to VCC disables internal 7V regulator - cuts idle power by >50% in light-load applications. |
Applications
| 12V/24V Distributed Rail Systems | Automotive Body Electronics |
|---|---|
Use Scenario: Powering CAN transceivers, LIN nodes, and door module MCUs from vehicle battery (9–16V) or 24V truck systems. IC Role / Device Role / Timing Role: Primary DC-DC buck converter delivering stable 3.3V or 5V from unregulated battery rail. Use Value: Wide 9–42V input handles cold-crank and load-dump transients; thermal shutdown prevents failure during under-hood overheating. |
Use Scenario: Supplying infotainment display backlight drivers and telematics modem logic from 12V battery. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator supporting burst-mode operation during sleep states. Use Value: 70–150µA shutdown current extends battery life; 0.5A output supports multi-rail sequencing without external boost. |
| Industrial Control I/O Modules | HB-LED Constant Current Source |
Use Scenario: Generating isolated 5V/3.3V for PLC digital I/O conditioning circuits in factory automation cabinets. IC Role / Device Role / Timing Role: Non-isolated buck stage preceding isolated DC-DC or LDO post-regulators. Use Value: VSSOP-8 footprint fits dense PCB layouts; 200°C/W θJA allows operation at 70°C ambient without heatsink. |
Use Scenario: Driving strings of high-brightness LEDs in signage or architectural lighting using constant-current configuration. IC Role / Device Role / Timing Role: Buck controller with external sense resistor and current-mode feedback loop. Use Value: Adjustable 2.5V reference enables precise current setpoint; intelligent current limit avoids LED thermal runaway during dimming 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 |
|---|---|---|---|
| LM25011MMX | Higher 1.5A output rating, wider 6–42V input, same VSSOP-8 package but higher RDS(on) (0.35Ω vs 0.74Ω). | Supports heavier loads (e.g., multi-core processors); less suitable for space-constrained 0.5A designs due to larger inductor requirements. | Select LM25011MMX only if >0.5A continuous output or lower RDS(on) is required; LM25007MMX remains optimal for cost- and size-sensitive 0.5A rails. |
| TPS54060DGQR | 60V input rating, 0.5A output, current-mode control (not constant on-time), requires external compensation, SOIC-8 package. | Superior input surge tolerance (60V vs 42V); lacks Vin feed-forward - frequency varies significantly with line/load. | Choose TPS54060DGQR for 48V telecom or high-transient industrial inputs; LM25007MMX preferred where frequency stability and simplicity outweigh voltage headroom needs. |
Compared with LM25011MMX and TPS54060DGQR, the LM25007MMX uniquely balances ultra-simple design (no compensation), VSSOP-8 thermal efficiency, and robust 42V operation - making it the most direct fit for cost-optimized 0.5A industrial and automotive buck supplies requiring predictable frequency behavior.
Availability
LM25007MMX is available at Aetrix Electronics and suitable for 12VDC/24VDC distributed rail systems, automotive body electronics, and industrial control I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM25007MMX 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 technologies, with decades of expertise in high-reliability power conversion ICs.
The LM25007MMX belongs to TI's industrial-grade DC-DC regulator product line, designed specifically for ruggedized, low-component-count buck conversion in harsh environments - emphasizing ease of use, thermal resilience, and transient robustness over feature complexity.
FAQ
What is the maximum input voltage rating for the LM25007MMX?
The LM25007MMX has an absolute maximum VIN rating of 45V, with recommended operating range from 9V to 42V. Exceeding 42V risks violating operating specifications, while 45V represents destructive limit. Applications with potential load-dump transients (e.g., automotive) must ensure clamping or filtering keeps VIN ≤42V during normal operation. The LM25007MMX datasheet specifies guaranteed performance only within the 9–42V range.
Does the LM25007MMX require external compensation components?
No, the LM25007MMX does not require external compensation components. Its constant on-time control architecture with Vin feed-forward eliminates the need for Type-II or Type-III compensation networks. This simplifies design, reduces bill-of-materials cost, and improves immunity to component tolerances - a key differentiator confirmed in the LM25007MMX datasheet Feature list and Operating Description sections.
What package type is used for the LM25007MMX?
The LM25007MMX uses the VSSOP-8 (DGK) package: 3.0mm × 3.0mm body, 0.65mm lead pitch, no exposed thermal pad. This differs from the WSON-8 (NGT) variant (e.g., LM25007SDX/NOPB), which includes an exposed pad for enhanced thermal performance. The LM25007MMX's VSSOP-8 is optimized for space-constrained layouts while maintaining manufacturability with standard SMT processes.
How is the switching frequency set on the LM25007MMX?
The LM25007MMX switching frequency is set indirectly via the RON/SD pin: an external resistor between RON/SD and VIN determines on-time, while off-time depends on load and output voltage. Frequency ranges from ~100kHz to 800kHz depending on VIN, VOUT, and RON value. The LM25007MMX datasheet provides the equation TON = 1.42×10−10 × RON/VIN, and typical curves show frequency variation across operating conditions.
Can the LM25007MMX be used in constant-current LED driver configurations?
Yes, the LM25007MMX can be configured as a constant-current LED driver by replacing the standard FB voltage divider with a current-sense resistor and adjusting feedback network accordingly. Its 2.5V reference, intelligent current limit, and wide output adjustability (2.5V to >30V) support HB-LED string regulation. Application note SNVA612 from Texas Instruments details this implementation for the LM25007MMX family.
LM25007MMX 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:
- Obsolete
- 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
LM25007MMX FAQ
1.How can I place an order for LM25007MMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25007MMX 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 LM25007MMX reliable?
The price and inventory of LM25007MMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25007MMX is usually 5 days.
3.What payment methods are accepted for LM25007MMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25007MMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25007MMX?
LM25007MMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25007MMX 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 LM25007MMX?
For technical support, including LM25007MMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25007MMX requirements.
6.How does Aetrix verify that LM25007MMX is sourced from the original manufacturer or authorized distributors?
All LM25007MMX 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 LM25007MMX meets industry standards.
7.What is the process for return or replacement of LM25007MMX?
All LM25007MMX units undergo pre-shipment inspection (PSI). If there is an issue with LM25007MMX, 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 LM25007MMX part is unused and in its original packaging.
Return procedure for LM25007MMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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