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Texas Instruments LM25007MMX/NOPB
- Part No.:
- LM25007MMX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM25007MMX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 500MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,900
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Product details
Overview
LM25007MMX/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, operating up to 800kHz, and featuring 2.5V ±2% feedback reference over −40°C to +125°C - used in 24VDC distributed rail systems and automotive body electronics.
For engineers reviewing the LM25007MMX/NOPB datasheet, LM25007MMX/NOPB pinout, LM25007MMX/NOPB application, or LM25007MMX/NOPB equivalent, key selection criteria include input voltage range (9–42V), no-loop-compensation architecture, Vin feed-forward frequency stability, intelligent current limit with VOUT-dependent off-time, and thermal shutdown at 165°C.
Technical Context
The LM25007MMX/NOPB employs a constant on-time hysteretic control architecture with VIN feed-forward, enabling near-constant switching frequency across line and load variations. Its on-time is set by an external resistor (RON/SD) and inversely proportional to VIN, while regulation relies on a 2.5V internal reference compared against FB voltage.
Current limiting uses a non-resettable off-timer whose duration scales inversely with FB voltage (e.g., 17µs at FB = 0V, ~2.65µs at FB = 2.3V with RCL = 100kΩ), ensuring fault recovery without foldback. The integrated N-channel buck switch drives external inductors and requires a bootstrap capacitor between BST and SW pins for high-side gate drive.
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 continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Switch RDS(on) | 0.74Ω typical - reduces conduction loss and enables high efficiency at mid-load conditions. |
| Feedback Reference | 2.5V ±2% over −40°C to +125°C - ensures stable output regulation across automotive temperature extremes. |
| Switching Frequency | Up to 800kHz - allows compact magnetics and low-output-ripple designs with small ceramic capacitors. |
| Current Limit Threshold | 725mA typical - provides cycle-by-cycle protection while permitting brief inrush during startup. |
| Thermal Shutdown | 165°C with 25°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
VSSOP-8 (DGK) package: thermally enhanced surface-mount, 3.0mm × 3.0mm footprint, exposed pad not present (WSON-8 has exposed pad; VSSOP-8 does not).
| 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 cap to SW - enables N-MOSFET operation without external charge pump. |
| 3 RCL | Current Limit Off-Time Set | Resistor-to-ground sets fault recovery time; off-time decreases as VOUT rises - avoids excessive foldback. |
| 4 RTN | Circuit Ground | Power ground reference for internal regulators and comparators - must be low-impedance return path. |
| 5 FB | Feedback Input | Compares output voltage divider ratio against 2.5V reference - determines regulation point (VOUT = 2.5 × (R3+R4)/R4). |
| 6 RON/SD | On-Time / Shutdown Control | Resistor-to-VIN sets on-time; pulled below 0.7V to enter <150µA shutdown - enables remote enable/disable. |
| 7 VCC | Internal Bias Supply | 7V regulated output powers gate driver; can be externally boosted >7V to disable internal regulator and improve light-load efficiency. |
| 8 VIN | Main Input Supply | Accepts 9–42V DC - includes UVLO (6.3V rising) and 3µs filter to reject transients. |
Key Features
| Feature | Design Value |
|---|---|
| No control loop compensation required | Hysteretic constant-on-time architecture eliminates external compensation network - reduces BOM count and design iteration. |
| VIN feed-forward frequency stabilization | Operating frequency remains nearly constant across 9–42V input and 0–0.5A load - simplifies EMI filtering and inductor selection. |
| Intelligent current limit with VOUT-scaled off-time | Off-time shortens under partial overload (e.g., 2.65µs at 2.3V FB), enabling faster recovery than fixed off-time schemes. |
| External shutdown with hysteresis | 0.45–1.1V threshold with 40mV hysteresis - prevents chatter during slow-rising enable signals in noisy environments. |
| Thermally enhanced VSSOP-8 package | θJA = 200°C/W - suitable for moderate-power applications without forced airflow or copper pour. |
Applications
| Industrial Power Rails | Automotive Body Control |
|---|---|
|
Use Scenario: Converting 24V battery or bus voltage to 5V/3.3V for ECUs, CAN transceivers, and LIN nodes in passenger compartments. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, regulated power with fast transient response to load steps from infotainment wake-up events. Use Value: 0.5A output and 42V max input tolerate load dump transients; thermal shutdown protects against connector faults or shorted downstream circuits. |
Use Scenario: Powering door module microcontrollers and window motor drivers from 12V/24V vehicle batteries. IC Role / Device Role / Timing Role: Compact, self-contained buck converter eliminating need for external MOSFET and controller IC - reduces board space and component count. Use Value: −40°C to +125°C operation meets AEC-Q100 ambient requirements; no compensation simplifies qualification testing. |
| HB-LED Constant Current Source | 24VAC System Conversion |
|
Use Scenario: Driving strings of high-brightness LEDs in signage or architectural lighting powered from 24VDC supplies. IC Role / Device Role / Timing Role: Regulator configured in constant-current mode using FB pin sensing across sense resistor - delivers stable LED current despite input ripple. Use Value: Ultra-fast transient response maintains LED brightness during PWM dimming transitions; 800kHz operation minimizes visible ripple. |
Use Scenario: Rectified and filtered 24VAC (≈34VDC) powering IoT gateways or smart thermostats in HVAC systems. IC Role / Device Role / Timing Role: High-input-voltage buck converter accepting unregulated rectified AC-derived DC - replaces linear regulators with >70% efficiency gain. Use Value: 42V absolute max rating accommodates peak rectified voltage plus margin; VCC boost option improves standby efficiency. |
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/NOPB | Higher 1.5A output current, 65V max input, same VSSOP-8 package but larger RDS(on) (0.35Ω vs 0.74Ω) | Better suited for higher-current loads; less efficient at 0.5A due to higher quiescent current (1.2mA vs 0.675mA) | Select when >0.5A output or >42V input headroom is required; verify thermal performance at full load. |
| TPS54202DDCR | 2A output, 28V max input, integrated compensation, 2.5V reference, but requires external compensation components | Designed for lower-input-voltage systems (e.g., 12V rails); lacks VIN feed-forward - frequency varies with line/load | Prefer for cost-sensitive 12V applications needing higher current; avoid where 24V/42V input or frequency stability is critical. |
Compared with LM25011MMX/NOPB and TPS54202DDCR, the LM25007MMX/NOPB offers optimal balance of input voltage range (9–42V), zero-compensation simplicity, and thermal robustness in VSSOP-8 - making it uniquely suitable for automotive and industrial 24VDC systems where reliability and design simplicity are prioritized over peak current capability.
Availability
LM25007MMX/NOPB is available at Aetrix Electronics and suitable for 24VDC distributed rail systems, automotive body electronics, and HB-LED constant current sources requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM25007MMX/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 LM25007MMX/NOPB belongs to TI's industrial-grade DC/DC regulator product line, designed specifically for rugged, wide-input-voltage applications in automotive, industrial, and building automation systems where minimal external components and thermal resilience are essential.
FAQ
What is the maximum input voltage rating for the LM25007MMX/NOPB?
The LM25007MMX/NOPB has an absolute maximum input voltage (VIN to RTN) of 45V, with recommended operating range from 9V to 42V. Exceeding 42V risks violating the operating ratings, though the device survives brief transients up to 45V per Absolute Maximum Ratings. Sustained operation above 42V is not guaranteed and may reduce lifetime reliability.
Does the LM25007MMX/NOPB require external compensation components?
No, the LM25007MMX/NOPB does not require external compensation components. Its constant on-time hysteretic control architecture inherently stabilizes the loop without resistors or capacitors on the COMP or SS pins - significantly simplifying layout and reducing bill-of-materials cost compared to voltage-mode or current-mode controllers.
How is the switching frequency set on the LM25007MMX/NOPB?
The LM25007MMX/NOPB switching frequency is determined by the input voltage and the external resistor connected between RON/SD and VIN. On-time follows Ton = 1.42×10⁻¹⁰ × RON / VIN, resulting in frequency variation inversely proportional to VIN. At VIN = 24V and RON = 200kΩ, typical frequency is ~500kHz; maximum achievable is ~800kHz under optimized conditions.
Can the LM25007MMX/NOPB operate with an output voltage below 2.5V?
No, the LM25007MMX/NOPB cannot regulate below 2.5V because its internal feedback reference is fixed at 2.5V. The minimum output voltage equals this reference (when FB is tied directly to VOUT). To achieve lower outputs, external circuitry such as a resistive divider with offset or a separate error amplifier would be required - but TI does not specify or guarantee operation in such configurations.
What package type is used for the LM25007MMX/NOPB?
The LM25007MMX/NOPB uses the VSSOP-8 (DGK) package: a 3.0mm × 3.0mm, 0.65mm pitch surface-mount package with gull-wing leads and no exposed thermal pad. It differs from the WSON-8 (NGT) variant, which includes an exposed pad for enhanced thermal performance - the VSSOP-8 version relies on PCB copper for heat dissipation.
LM25007MMX/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
LM25007MMX/NOPB FAQ
1.How can I place an order for LM25007MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25007MMX/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 LM25007MMX/NOPB reliable?
The price and inventory of LM25007MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25007MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LM25007MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25007MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25007MMX/NOPB?
LM25007MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25007MMX/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 LM25007MMX/NOPB?
For technical support, including LM25007MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25007MMX/NOPB requirements.
6.How does Aetrix verify that LM25007MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM25007MMX/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 LM25007MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LM25007MMX/NOPB?
All LM25007MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM25007MMX/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 LM25007MMX/NOPB part is unused and in its original packaging.
Return procedure for LM25007MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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