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Texas Instruments LM5007MMX
- Part No.:
- LM5007MMX
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM5007MMX.pdf
- Description:
- IC REG BUCK ADJ 500MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,398
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Product details
Overview
LM5007MMX 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 power MOSFET, adaptive constant-on-time (COT) control, and 2.5-V precision feedback reference. It operates from 9 V to 75 V input, delivers regulated output voltage via external resistor divider, and supports fast transient response in telecom and automotive post-regulation applications.
For engineers reviewing the LM5007MMX datasheet, LM5007MMX pinout, LM5007MMX application, or LM5007MMX equivalent, key selection criteria include its 8-pin VSSOP package, programmable on-time (via RON), current-limit off-time tuning (via RCL), bootstrap gate drive (BST–SW), and thermal shutdown with 25°C hysteresis - all critical for high-voltage industrial and 48-V bus designs.
Technical Context
The LM5007MMX implements an adaptive constant-on-time (COT) hysteretic control architecture where on-time is inversely proportional to VIN and set by an external resistor on RON, enabling near-constant switching frequency across line and load variations. Its internal 7-V VCC regulator powers the gate driver and bias circuits, while BST–SW bootstrap operation enables high-side N-MOSFET drive without external high-voltage gate drivers.
Current limiting uses an intelligent off-time generator dependent on FB voltage and RCL, delivering 17 µs minimum off-time at short-circuit (VFB = 0 V) and scaling down as VOUT rises - reducing foldback and improving overload recovery. Protection includes VCC UVLO (6.3 V), gate-drive UVLO (4.5 V), thermal shutdown (165°C), and overvoltage detection (2.875 V at FB).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9 V to 75 V - supports direct connection to unregulated 12 V, 24 V, and 48 V rails without pre-regulation. |
| Output Current | 0.5 A DC - maximum continuous load current with integrated 0.7-A N-MOSFET and thermal derating. |
| Feedback Reference | 2.5 V ±25 mV - precise internal threshold enabling accurate output regulation via RFB1/RFB2 divider. |
| Switching Control | Adaptive COT - no loop compensation required; on-time programmed by RON, off-time dynamically adjusted by RCL and FB. |
| Integrated MOSFET | 80-V, 0.7-A N-channel - rated for 76 V breakdown at full temperature range; RDS(on) = 0.74 Ω (typ) at 0.2 A. |
| Thermal Shutdown | 165°C with 25°C hysteresis - automatic recovery after junction cooling, preventing latch-up during overload. |
| Quiescent Current | 675 µA (typ) - low operating ICC enables high efficiency at light loads in always-on systems. |
Pinout & Package
LM5007MMX is supplied in an 8-pin VSSOP (DGK) package with 3.00 mm × 3.00 mm body size and exposed thermal pad (not electrically connected). Pin layout is optimized for minimal loop area in high-frequency buck topologies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switching node | Power switch output; connects directly to inductor and freewheeling diode cathode - high dv/dt node requiring tight layout. |
| 2 BST | Bootstrap capacitor input | Drives high-side gate; requires 0.01-µF ceramic cap between BST and SW to sustain gate voltage during high-side conduction. |
| 3 RCL | Current limit off-time programming | Sets cycle-by-cycle off-time duration based on FB voltage; determines short-circuit response and overload foldback behavior. |
| 4 RTN | Circuit ground | Analog and power return; must be tied to low-impedance PCB ground plane - separate from noisy power ground if possible. |
| 5 FB | Feedback input | Connects to resistor divider from VOUT; compares against 2.5-V internal reference to regulate output voltage. |
| 6 RON | On-time programming / shutdown | Resistor from VIN sets on-time inversely with input voltage; pulling below 0.7 V disables switching and reduces IQ to 100 µA. |
| 7 VCC | Internal bias regulator output | 7-V regulated supply for gate drive and logic; can be externally biased above 7 V to disable internal regulator and reduce dissipation. |
| 8 VIN | Main input supply | High-voltage input (9–75 V); requires local 0.1-µF ceramic decoupling to RTN close to pin for stability and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Adaptive COT architecture eliminates external compensation network - reduces BOM count and design iteration time. |
| Programmable current limit response | RCL pin allows tuning of off-time from 2.65 µs (VFB = 2.3 V) to 17 µs (VFB = 0 V), optimizing short-circuit protection vs. overload recovery. |
| Self-biasing capability | VCC pin accepts auxiliary 7–14 V supply to bypass internal HV regulator - lowers IC power loss in high-input-voltage, low-load conditions. |
| Fast transient response | Hysteretic control enables sub-microsecond load step recovery - critical for burst-mode digital loads in telecom infrastructure. |
| Robust protection suite | Includes VCC/gate-drive UVLO, thermal shutdown with hysteresis, overvoltage comparator (2.875 V), and max duty cycle limiter. |
Applications
| 48-V Automotive Post-Regulator | Industrial Telecom Power Supply |
|---|---|
|
Use Scenario: Regulating 48-V battery rail to 3.3 V or 5 V for infotainment ECUs and ADAS sensors under wide temperature and load transients. IC Role / Device Role / Timing Role: Primary non-isolated buck controller providing stable, low-noise output with adaptive COT for rapid load-step response. Use Value: Eliminates need for external gate driver and compensation components; 75-V rating ensures robustness against load-dump transients up to 80 V. |
Use Scenario: Generating intermediate 12-V or 5-V rails from -48-V telecom rectified bus in base station power modules. IC Role / Device Role / Timing Role: High-voltage buck converter operating in DCM at light loads to maintain >85% efficiency down to 1 mA. Use Value: 675 µA quiescent current and programmable RON-based shutdown enable ultra-low standby power in always-on network equipment. |
| Smart Grid Sensor Node Power | Industrial PLC I/O Module Supply |
|
Use Scenario: Powering isolated RS-485 transceivers and microcontrollers from 24-V or 48-V fieldbus in harsh EMI environments. IC Role / Device Role / Timing Role: Compact, thermally efficient buck regulator with integrated MOSFET and bootstrap gate drive - no external high-side driver needed. Use Value: VSSOP-8 package with exposed pad enables <38°C/W θJB thermal resistance - sustains 0.5-A output at 85°C ambient without heatsink. |
Use Scenario: Providing 5-V or 3.3-V supply to digital I/O channels in DIN-rail mounted programmable logic controllers with wide input variation. IC Role / Device Role / Timing Role: Input-tolerant buck controller supporting 9–75 V range - accommodates brownouts, surges, and battery-backed operation. Use Value: Intelligent current limit with VFB-scaled off-time prevents nuisance tripping during motor startup inductive inrush while maintaining short-circuit safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164PWPR | Wider 3–100 V input, 0.6-A output, integrated 100-V MOSFET; uses current-mode control with compensation required. | Better suited for ultra-wide input ranges and higher current; lacks adaptive COT's zero-compensation benefit. | Choose LM5164PWPR when input may dip below 9 V or exceed 75 V, or when higher peak current is needed. |
| TPS54060DGQR | 6–60 V input, 0.5-A, current-mode control; requires external compensation; no BST pin or bootstrap gate drive. | Lower max input voltage; relies on external high-side driver or P-MOSFET; less suitable for 48-V+ systems. | Choose TPS54060DGQR only for cost-sensitive 24-V systems where 75-V rating and bootstrap simplicity are not required. |
Compared with LM5007MMX, LM5164PWPR offers broader input range and higher current but adds compensation complexity, while TPS54060DGQR sacrifices high-voltage capability and gate-drive integration - making LM5007MMX optimal for fixed 9–75 V, low-component-count 48-V post-regulation.
Availability
LM5007MMX is available at Aetrix Electronics and suitable for 48-V automotive systems, industrial telecom power supplies, and smart grid sensor nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM5007MMX 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 LM5007MMX belongs to TI's high-voltage DC/DC buck converter product line, designed specifically for robust, compact, and easy-to-implement solutions in 12-V, 24-V, and 48-V industrial and automotive power systems.
FAQ
What is the maximum input voltage rating for the LM5007MMX?
The LM5007MMX has an absolute maximum input voltage (VIN to RTN) of 80 V, with recommended operating range from 9 V to 75 V. At junction temperatures from –40°C to 125°C, the integrated MOSFET's breakdown voltage is derated to 76 V - ensuring safe operation under transient overvoltage conditions common in automotive and industrial environments. This rating is confirmed in Section 6.5 of the SNVS252H datasheet.
How does the LM5007MMX achieve constant switching frequency without loop compensation?
The LM5007MMX uses adaptive constant-on-time (COT) control: on-time is inversely proportional to VIN and set by the RON resistor, while off-time ends when FB falls below 2.5 V. This hysteretic scheme inherently maintains near-constant frequency across line and load changes - eliminating the need for external compensation components. The LM5007MMX datasheet confirms this in Sections 7.3.1 and 8.2.
Can the LM5007MMX operate with no external components besides the inductor and output capacitor?
No - the LM5007MMX requires at minimum: (1) a 0.01-µF BST–SW ceramic capacitor, (2) a 0.1-µF VIN–RTN decoupling capacitor, (3) RON resistor to set on-time, (4) RCL resistor to configure current-limit off-time, and (5) RFB1/RFB2 divider for output voltage setting. These are mandatory per Section 5 (Pin Functions) and Figure 4 of the LM5007MMX datasheet - omitting any compromises regulation, stability, or protection.
What is the purpose of the RCL pin on the LM5007MMX, and how is it used?
The RCL pin on the LM5007MMX programs the current-limit off-time duration, which scales inversely with FB voltage: tOFF = 10⁻⁵ / (0.59 + (VFB / 7.22×10⁻⁶ × RCL)). With RCL = 100 kΩ, off-time varies from 17 µs (VFB = 0 V, short circuit) to 2.65 µs (VFB = 2.3 V, partial overload). This intelligent scaling reduces current foldback and improves recovery - detailed in Section 5 and Equation 5 of the LM5007MMX datasheet.
Does the LM5007MMX support remote shutdown, and what is the threshold voltage?
Yes - the LM5007MMX supports remote shutdown via the RON pin. Pulling RON below 0.7 V (typical) activates shutdown mode, reducing quiescent current to ~100 µA. The shutdown threshold is specified as 0.45 V (min) to 1.1 V (max) with 40-mV hysteresis (VSHD-HYS), enabling clean, noise-immune disable functionality. This is documented in Section 6.5 (Electrical Characteristics) of the LM5007MMX datasheet.
LM5007MMX 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):
- 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 FAQ
1.How can I place an order for LM5007MMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5007MMX 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 reliable?
The price and inventory of LM5007MMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5007MMX is usually 5 days.
3.What payment methods are accepted for LM5007MMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5007MMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5007MMX?
LM5007MMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5007MMX 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?
For technical support, including LM5007MMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5007MMX requirements.
6.How does Aetrix verify that LM5007MMX is sourced from the original manufacturer or authorized distributors?
All LM5007MMX 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 meets industry standards.
7.What is the process for return or replacement of LM5007MMX?
All LM5007MMX units undergo pre-shipment inspection (PSI). If there is an issue with LM5007MMX, 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 part is unused and in its original packaging.
Return procedure for LM5007MMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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