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Texas Instruments LM5007MMX/NOPB
- Part No.:
- LM5007MMX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM5007MMX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 500MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,777
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Product details
Overview
LM5007MMX/NOPB from Texas Instruments is a 75-V input, 0.5-A synchronous buck DC/DC converter with integrated 80-V/0.7-A N-channel MOSFET, adaptive constant-on-time (COT) control, 2.5-V precision reference, and operation across 9 V to 75 V input range. It delivers regulated output for industrial power supplies and 48-V automotive post-regulation.
For engineers reviewing the LM5007MMX/NOPB datasheet, LM5007MMX/NOPB pinout, LM5007MMX/NOPB application, or LM5007MMX/NOPB equivalent, key selection considerations include input voltage range compatibility, external RON/RCL programming requirements, thermal performance in VSSOP-8 vs WSON-8 packages, and bootstrap capacitor implementation for gate drive.
Technical Context
The LM5007MMX/NOPB uses an adaptive constant-on-time (COT) control architecture where on-time is inversely proportional to VIN via external RON resistor, enabling near-constant switching frequency across line and load variations. It operates in both continuous conduction mode (CCM) at heavy loads and discontinuous conduction mode (DCM) at light loads.
Its intelligent current limit employs a programmable off-time generator dependent on FB voltage and external RCL resistor, delivering 535–900 mA threshold with cycle-by-cycle protection and foldback reduction. Internal 7-V VCC regulator powers gate drive and control circuits, with UVLO at 6.3 V and hysteresis of 206 mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9 V to 75 V - supports direct connection to 12 V, 24 V, and 48 V unregulated rails without pre-regulation. |
| Output Current | 0.5 A DC - maximum sustained load current with thermal derating per package RθJA (158.3°C/W for VSSOP). |
| Integrated Switch | 80-V, 0.7-A N-channel MOSFET - eliminates external high-voltage switch; RDS(on) = 0.74 Ω (typ) at 0.2 A. |
| Reference Voltage | 2.5 V ±20 mV - sets output regulation point; used with external RFB1/RFB2 divider for adjustable VOUT. |
| Control Architecture | Adaptive COT - no loop compensation required; ultra-fast transient response; minimum off-time = 300 ns. |
| Quiescent Current | 675 µA (typ) - enables low-power operation in always-on systems; drops to 100–200 µA in shutdown. |
| Thermal Shutdown | 165°C with 25°C hysteresis - automatic recovery after cooling; protects against sustained overload or poor heatsinking. |
Pinout & Package
LM5007MMX/NOPB is supplied in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size) with exposed pad not connected internally; pinout matches DGK package variant per TI SNVS252H datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node output | Drives external LC filter; connects to source of freewheeling diode and inductor; swings from RTN to VIN. |
| BST | Bootstrap capacitor input | Requires 0.01-µF ceramic cap to SW; supplies floating gate drive voltage for internal N-MOSFET. |
| RCL | Current limit off-time programming | Resistor to RTN sets off-time inversely with FB voltage; default 17 µs at short-circuit (FB = 0 V). |
| RTN | Circuit ground reference | Analog and power ground return; must be low-impedance star point for stability and noise immunity. |
| FB | Feedback input | Senses output via resistive divider; comparator trips at 2.5 V; also triggers overvoltage shutdown at 2.875 V. |
| RON | On-time programming / shutdown | Resistor to VIN sets on-time inversely with VIN; <0.7 V enables shutdown mode with ~100 µA IQ. |
| VCC | Internal bias regulator output | 7 V ±0.4 V regulated output; powers gate driver and logic; max 10 mA load; UVLO at 6.3 V. |
| VIN | Main input supply | 9–75 V input; internal 80-V MOSFET drain connection; requires local 0.1-µF ceramic decoupling to RTN. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT control | Eliminates loop compensation components; achieves sub-µs transient response without stability tuning. |
| Programmable current limit | Off-time scales with FB voltage to reduce foldback during partial overloads while maintaining short-circuit protection. |
| Integrated 80-V MOSFET | Reduces BOM count and layout area; avoids external high-voltage switch selection and gate driver design. |
| VCC self-bias regulator | Enables direct high-voltage input operation; auxiliary 7-V supply can be injected to reduce IC power dissipation. |
| Thermal shutdown with hysteresis | Prevents thermal runaway; automatic restart after junction cools by ≥25°C ensures robust fault recovery. |
Applications
| Industrial Power Supply | Automotive 48-V Post-Regulator |
|---|---|
Use Scenario: Step-down conversion from 24–72 V battery or rectified AC bus to stable 3.3 V or 5 V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing regulated rail; handles wide input transients and cold-crank conditions. Use Value: Integrated 80-V switch withstands load dump spikes up to 75 V; COT control maintains regulation during fast load steps in factory automation. | Use Scenario: Secondary regulation stage downstream of 48-V main bus to generate 12 V for infotainment subsystems or ADAS cameras. IC Role / Device Role / Timing Role: High-efficiency post-regulator managing variable loads from 10 mA to 500 mA with minimal heat generation. Use Value: 675 µA quiescent current extends standby time; thermal shutdown prevents failure during cabin temperature extremes. |
| Telecom Line Card Supply | High-Voltage IoT Gateway |
Use Scenario: Compact DC/DC stage converting -48 V telecom supply (referred to local ground) to +3.3 V for FPGA or Ethernet PHY. IC Role / Device Role / Timing Role: Input-referred buck controller operating from negative rail via level-shifted feedback network. Use Value: 9–75 V input range accommodates reverse-polarity protection losses; RON-based shutdown enables remote power cycling. | Use Scenario: Power management for outdoor edge nodes powered by solar-charged 48-V LiFePO₄ batteries with wide voltage swing (36–58 V). IC Role / Device Role / Timing Role: Main system regulator supporting intermittent wireless transmission bursts and deep sleep modes. Use Value: DCM operation at light loads improves efficiency below 10 mA; minimum 1 mA load requirement met via FB divider biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5008MMX/NOPB | Same COT architecture but rated for 100-V input (VIN max = 100 V); higher RDS(on) = 1.2 Ω; identical pinout and package. | Required for >75 V input transients (e.g., 96-V industrial buses); lower efficiency at 48 V due to higher conduction loss. | Select LM5008MMX/NOPB only if input may exceed 75 V; otherwise LM5007MMX/NOPB offers better efficiency at ≤75 V. |
| TPS54060DGQR | 60-V input, 0.5-A buck with current-mode control; requires external compensation; 3.5-V to 60-V input; different pinout and control scheme. | Suitable for designs needing tighter VOUT tolerance under line/load variation; lacks integrated high-voltage MOSFET - needs external FET and driver. | Choose TPS54060DGQR when precise regulation and external FET flexibility outweigh simplicity and high-voltage integration. |
Compared with LM5008MMX/NOPB, LM5007MMX/NOPB provides lower RDS(on) and optimized efficiency across its 9–75 V range, while TPS54060DGQR trades integration for design flexibility and tighter regulation-making LM5007MMX/NOPB optimal for space-constrained, high-input-voltage buck applications requiring minimal external components.
Availability
LM5007MMX/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive 48-V subsystems, and telecom line card designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for LM5007MMX/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 technologies with over 50 years of innovation in high-reliability power conversion.
The LM5007MMX/NOPB belongs to TI's high-voltage DC/DC converter product line, designed specifically for cost-sensitive, compact buck regulators operating directly from unregulated 12–75 V rails in industrial and automotive environments.
FAQ
What is the maximum input voltage rating for LM5007MMX/NOPB?
The LM5007MMX/NOPB has an absolute maximum input voltage (VIN to RTN) rating of 80 V per the datasheet Absolute Maximum Ratings table. Its recommended operating range is 9 V to 75 V, making it suitable for 48-V automotive and industrial systems with transient headroom. Exceeding 75 V during normal operation risks violating recommended conditions, though brief 80-V transients are survivable.
How does the LM5007MMX/NOPB implement current limiting?
The LM5007MMX/NOPB uses an intelligent cycle-by-cycle current limit with programmable off-time. When switch current exceeds 535–900 mA (typ 725 mA), the on-time is terminated immediately, then a non-resettable off-timer activates. Its duration depends on RCL and FB voltage - 17 µs at short-circuit (FB = 0 V), decreasing as VOUT rises - reducing foldback while maintaining protection integrity in the LM5007MMX/NOPB.
Can LM5007MMX/NOPB operate without an external bootstrap capacitor?
No. The LM5007MMX/NOPB requires a 0.01-µF ceramic capacitor between BST and SW pins to sustain gate drive for the internal N-channel MOSFET. Without it, the bootstrap capacitor cannot recharge during each off-cycle, causing gate drive collapse and immediate functional failure. This is mandatory per Pin Functions description in the LM5007MMX/NOPB datasheet.
What is the purpose of the RON pin on LM5007MMX/NOPB?
The RON pin on LM5007MMX/NOPB serves two functions: it programs the on-time via an external resistor to VIN (tON ∝ RON/VIN), and it enables shutdown when pulled below 0.7 V. In shutdown, LM5007MMX/NOPB draws only ~100 µA, making it ideal for low-power standby modes. The pin is a low-impedance input biased at ~1.5 V, ensuring accurate current-sensing for timing control.
Does LM5007MMX/NOPB require output capacitor ESR for stable operation?
Yes. The LM5007MMX/NOPB's adaptive COT control relies on resistive ripple at the FB pin for stable switching. A minimum ESR on the output capacitor generates in-phase ripple that decreases monotonically during off-time - essential for proper comparator triggering. If ceramic capacitors with near-zero ESR are used, a small series resistor (e.g., 20–50 mΩ) must be added to meet the 25–50 mV ripple requirement at FB in the LM5007MMX/NOPB.
LM5007MMX/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):
- 75V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 73V
- Current - Output:
- 500mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LM5007MMX/NOPB FAQ
1.How can I place an order for LM5007MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5007MMX/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 LM5007MMX/NOPB reliable?
The price and inventory of LM5007MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5007MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LM5007MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5007MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5007MMX/NOPB?
LM5007MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5007MMX/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 LM5007MMX/NOPB?
For technical support, including LM5007MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5007MMX/NOPB requirements.
6.How does Aetrix verify that LM5007MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5007MMX/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 LM5007MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LM5007MMX/NOPB?
All LM5007MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5007MMX/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 LM5007MMX/NOPB part is unused and in its original packaging.
Return procedure for LM5007MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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