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Texas Instruments LM25007MM
- Part No.:
- LM25007MM
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM25007MM.pdf
- Description:
- IC REG BUCK ADJ 500MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,335
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Product details
Overview
LM25007MM 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 is optimized for 12V/24V distributed rail systems and automotive body electronics.
For engineers reviewing the LM25007MM datasheet, LM25007MM pinout, LM25007MM application, or LM25007MM 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 LM25007MM implements a constant on-time hysteretic control scheme where on-time is inversely proportional to VIN and set by an external resistor on the RON/SD pin. Its Vin feed-forward ensures stable operating frequency across line and load variations without requiring external compensation components.
It integrates a high-side N-channel buck switch with bootstrap gate drive (BST–SW capacitor required), internal 7V bias regulator (with UVLO at 6.3V), and dual protection: cycle-by-cycle current limiting (725mA typical) with programmable off-time via RCL pin, plus thermal shutdown at 165°C.
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 |
| Switch RDS(on) | 0.74Ω (typ) - enables high efficiency at medium loads while minimizing conduction loss |
| Feedback Reference | 2.5V ±2% (−40°C to 125°C) - provides precise output regulation over full temperature range |
| Operating Frequency | Up to 800kHz - allows compact magnetics and low-output-ripple designs |
| Current Limit Threshold | 725mA (typ) - protects against overload while enabling fast recovery via FB-dependent off-time |
| Shutdown Quiescent Current | 70–150µA - enables ultra-low power standby in battery-backed or energy-sensitive applications |
Pinout & Package
VSSOP-8 (DGK) package with exposed pad not present - thermally enhanced WSON-8 variant exists (LM25007SD), but LM25007MM is strictly VSSOP-8 per TI packaging addendum (Orderable: LM25007MM/NOPB.B, Package: VSSOP | 8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching Node | Power switching node connecting to inductor, bootstrap capacitor, and freewheeling diode - must be routed with minimal parasitic inductance |
| BST | Bootstrap Supply | Drives high-side gate via external 0.01µF ceramic capacitor to SW - enables N-MOSFET high-side operation without isolated supply |
| RCL | Current Limit Off-Time Set | Resistor-to-ground sets fault recovery time; off-time decreases as FB voltage rises - prevents excessive foldback during partial overloads |
| RTN | Circuit Ground | Power ground reference for internal regulators and comparators - requires low-impedance connection to PCB ground plane |
| FB | Feedback Input | Inverting input of regulation comparator referenced to 2.5V - output voltage set by resistive divider (VOUT = 2.5 × (R3+R4)/R4) |
| RON/SD | On-Time Set / Shutdown | Resistor-to-VIN sets on-time; pulled low (<0.7V) disables regulator and reduces IQ to ~100µA - enables system-level enable/disable control |
| VCC | Bias Regulator Output | Internal 7V series regulator powers gate drive; can be bypassed with external ≥7V supply to reduce dissipation - max rating 14V |
| VIN | Main Input Supply | Primary power input (9–42V); requires local 0.1µF ceramic decoupling to RTN - internal UVLO prevents startup below 6.3V |
Key Features
| Feature | Design Value |
|---|---|
| No external loop compensation required | Constant on-time architecture eliminates need for compensation network - simplifies design, improves transient response, and reduces BOM count |
| Ultra-fast transient response | Feed-forward control and hysteretic regulation achieve sub-microsecond load-step recovery - critical for powering digital loads with dynamic current demand |
| Intelligent current limit protection | Off-time inversely proportional to FB voltage - short-circuit recovery uses full 17µs, while partial overloads use shorter off-times to minimize output droop |
| VIN feed-forward frequency stability | Operating frequency remains nearly constant across 9–42V input and 0–0.5A load - simplifies EMI filtering and magnetics selection |
| External shutdown control | RON/SD pin accepts logic-level disable signal (<0.7V) - enables coordinated power sequencing and system-level sleep modes |
Applications
| Automotive Body Electronics | Industrial Distributed Power |
|---|---|
Use Scenario: Powering door module ECUs, seat controllers, and lighting drivers from 12V/24V battery rails subject to load dump transients. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator providing stable 5V or 3.3V to MCU and CAN transceivers. Use Value: 42V absolute max input withstands ISO 7637-2 pulse 5a (load dump), while 0.5A output supports multi-peripheral integration without external boost. | Use Scenario: Converting 24VDC factory bus to 5V/12V for PLC I/O modules, sensor transmitters, and HART communicators. IC Role / Device Role / Timing Role: Compact, self-contained buck converter eliminating need for external controller + MOSFET + driver. Use Value: VSSOP-8 footprint and no compensation reduce board area vs. controller-based solutions; 800kHz operation enables <10mm² total solution size. |
| HB-LED Constant Current Source | 24VAC Systems |
Use Scenario: Driving strings of high-brightness LEDs from 24VDC supplies in signage and architectural lighting. IC Role / Device Role / Timing Role: Voltage-mode buck regulator with external current-sense resistor and feedback divider configured for constant-current regulation. Use Value: 2.5V reference accuracy (±2%) and low FB bias current (100nA) enable stable current regulation across temperature; RCL pin allows tailoring fault response for LED open-circuit vs. short-circuit. | Use Scenario: Rectified and regulated 24VAC (≈34VDC peak) powering HVAC controllers, smart thermostats, and building automation nodes. IC Role / Device Role / Timing Role: Primary DC-DC regulator accepting unregulated rectified input with wide 9–42V operating range. Use Value: Eliminates need for bulky linear pre-regulators; 42V max input accommodates 24VAC RMS + 20% tolerance + rectifier drop + ripple margin. |
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 | Higher 1.5A output, same VSSOP-8 package, 65V max input, but requires external compensation | Supports higher current loads (e.g., multi-rail PMIC front-end), less suitable for space-constrained 0.5A designs | Select LM25011MM only when >0.5A output or >42V input is required; LM25007MM preferred for simplicity and footprint |
| TPS54060DGQ | 60V input, 0.5A, integrated FET, but uses current-mode control with external compensation and lower efficiency at light loads | Better suited for high-input-voltage industrial converters where 60V rating is mandatory | Choose TPS54060DGQ if input exceeds 42V; otherwise LM25007MM offers superior transient response and simpler layout |
Compared with LM25011MM and TPS54060DGQ, the LM25007MM uniquely combines 0.5A capability, 42V input, VSSOP-8 packaging, and zero-compensation constant on-time control - making it optimal for cost-sensitive, space-constrained 12V/24V embedded power rails where rapid load transients occur.
Availability
LM25007MM is available at Aetrix Electronics and suitable for 12VDC/24VDC distributed rail systems, automotive body electronics, and industrial control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM25007MM 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 ICs, with leadership in high-reliability industrial and automotive power solutions.
The LM25007MM belongs to TI's high-voltage buck regulator product line, designed specifically for robust, compact DC-DC conversion in harsh environments - emphasizing ease of use, fault resilience, and thermal efficiency in constrained spaces.
FAQ
What is the maximum input voltage rating for the LM25007MM?
The LM25007MM has an absolute maximum input voltage (VIN to RTN) of 45V, with recommended operating range from 9V to 42V. Exceeding 42V during normal operation risks violating the guaranteed electrical characteristics, though brief transients up to 45V are tolerated per absolute maximum ratings. The device is commonly used in 24V automotive and industrial systems where load dump events may reach 40V - the 42V operating ceiling provides essential margin.
Does the LM25007MM require external compensation components?
No, the LM25007MM does not require external compensation components. Its constant on-time control architecture with VIN feed-forward eliminates the need for loop compensation networks. This simplifies design, reduces bill-of-materials cost, and improves transient response compared to traditional voltage-mode or current-mode controllers that rely on external RC networks for stability.
How is the switching frequency set on the LM25007MM?
The LM25007MM switching frequency is determined by the input voltage (VIN), output voltage (VOUT), and the external resistor connected between the RON/SD pin and VIN. The on-time is calculated as Ton ≈ 1.42×10⁻¹⁰ × RON / VIN, and frequency varies inversely with on-time. While not directly programmable like a fixed-frequency controller, the architecture maintains near-constant frequency across line and load - typically ranging up to 800kHz depending on operating conditions.
What package type is used for the LM25007MM?
The LM25007MM uses the VSSOP-8 (DGK) package - an 8-pin, leaded, surface-mount package measuring 3.0mm × 3.0mm × 1.0mm with 0.5mm pitch. Per TI's packaging addendum, LM25007MM/NOPB.B is explicitly designated as VSSOP (DGK) | 8, distinguishing it from the thermally enhanced WSON-8 (NGT) variant (LM25007SD). No exposed thermal pad is present in the VSSOP version.
Can the LM25007MM be used in HB-LED constant current applications?
Yes, the LM25007MM can be configured for HB-LED constant current operation by placing the current-sense resistor in the return path and routing its voltage drop to the FB pin. With its 2.5V reference accuracy (±2%), low FB bias current (100nA), and programmable current limit off-time via RCL, the LM25007MM supports stable, temperature-resilient LED current regulation - especially valuable in signage and architectural lighting powered from 24VDC rails.
LM25007MM 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
LM25007MM FAQ
1.How can I place an order for LM25007MM through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25007MM 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 reliable?
The price and inventory of LM25007MM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25007MM is usually 5 days.
3.What payment methods are accepted for LM25007MM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25007MM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25007MM?
LM25007MM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25007MM 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?
For technical support, including LM25007MM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25007MM requirements.
6.How does Aetrix verify that LM25007MM is sourced from the original manufacturer or authorized distributors?
All LM25007MM 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 meets industry standards.
7.What is the process for return or replacement of LM25007MM?
All LM25007MM units undergo pre-shipment inspection (PSI). If there is an issue with LM25007MM, 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 part is unused and in its original packaging.
Return procedure for LM25007MM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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