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Texas Instruments LM5006MMX/NOPB
- Part No.:
- LM5006MMX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM5006MMX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 600MA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,203
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Product details
Overview
LM5006MMX/NOPB from Texas Instruments is a high-voltage 80 V, 600 mA constant on-time synchronous buck switching regulator in a 10-pin VSSOP package. It integrates an N-channel buck switch, internal 7.5 V VCC regulator, programmable UVLO with status flag, and LG gate driver for external synchronous rectifier. It delivers stable 2.5 V to 75 V output regulation in telecom and automotive 42 V/48 V systems.
For engineers reviewing the LM5006MMX/NOPB datasheet, LM5006MMX/NOPB pinout, LM5006MMX/NOPB application, or LM5006MMX/NOPB equivalent, key selection considerations include input voltage range (6–75 V), no-loop-compensation operation, intelligent current limit with inverse-VOUT off-time, adjustable frequency via RT resistor, and integrated pre-charge switch for reliable bootstrap capacitor charging under light-load and startup conditions.
Technical Context
The LM5006MMX/NOPB uses a constant on-time control architecture where on-time varies inversely with VIN, enabling stable switching frequency across line and load variations without external compensation. Its regulation relies on comparing FB voltage to a precision 2.5 V internal reference, with overvoltage protection triggered at 2.85 V.
It implements intelligent current limiting via a non-resettable off-timer whose duration is inversely proportional to FB voltage-ensuring fast short-circuit response (max off-time ≈37 µs at FB = 0 V) while minimizing foldback during moderate overloads. The integrated pre-charge switch activates for ~150 ns during minimum off-time to maintain BST-SW voltage above gate drive UVLO (2.15–3.8 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 75 V - supports 42 V automotive and 48 V telecom rails with 80 V absolute max rating. |
| Switch RDS(on) | 0.56 Ω (typ) - enables high efficiency at 600 mA continuous output with low conduction loss. |
| FB Reference Voltage | 2.5 V ±2.5% - sets precise output regulation point; VOUT = 2.5 × (RFB1 + RFB2)/RFB1. |
| Current Limit Threshold | 700–1500 mA - provides short-circuit protection with adaptive off-time scaling based on FB voltage. |
| Switching Frequency | Constant with line/load - determined by RT resistor and VIN; min on-time ≥200 ns ensures stability at 75 V. |
| VCC Regulator Output | 7.5 V ±0.4 V - powers internal gate drivers and logic; current-limited to 30 mA for self-bias operation. |
| Thermal Shutdown | 165 °C (with 20 °C hysteresis) - disables switch to prevent damage during sustained overload or poor heatsinking. |
Pinout & Package
LM5006MMX/NOPB is housed in a 10-lead VSSOP (DGS) package with 0.5 mm pitch, optimized for high-voltage isolation and thermal performance (θJA = 200 °C/W). Pin 1 is SW (switching node); pin 10 is VIN. Exposed thermal pad is not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Connects to inductor, synchronous FET source, and BST capacitor; handles full switching current and voltage transients up to 80 V. |
| BST | Bootstrap supply | Charged from VCC via internal diode when SW is low; requires ≥0.01 µF ceramic cap to SW for high-side gate drive. |
| LG | Low-side gate driver | Drives external N-MOSFET synchronous rectifier; 56 ns deadtime after SW turn-off prevents shoot-through. |
| RTN | Power ground | Common return for VCC, UV, UVO, FB, RT/SD; must be low-impedance connection to minimize noise coupling. |
| UV | UV detector input | Resistor-divider input for programmable undervoltage lockout; 2.5 V threshold with hysteresis enabled by internal 5 µA sink. |
| UVO | UV status flag | Open-drain output pulled low when UV < 2.5 V, VCC UVLO active, or RT/SD shutdown asserted. |
| FB | Feedback input | Inverting input of regulation comparator; 1 nA bias current enables high-impedance resistive divider design. |
| RT/SD | On-time set & shutdown | Resistor-to-VIN sets on-time; grounding forces shutdown with ≤70 µA quiescent current. |
| VCC | Internal bias supply | 7.5 V regulated output; requires 1 µF ceramic decoupling to RTN; powers gate drivers and internal logic. |
| VIN | Main power input | Accepts 6–75 V DC; withstands 80 V transient; supplies both power stage and internal VCC regulator. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Constant on-time architecture eliminates need for external compensation network - reduces BOM count and layout sensitivity. |
| Ultra-fast transient response | On-time control enables immediate reaction to load steps - FB voltage directly triggers next on-pulse without error amplifier delay. |
| Programmable input UVLO with status flag | UV pin accepts resistor divider; UVO open-drain output signals fault condition to system controller without additional logic. |
| Pre-charge switch for bootstrap gate drive | 150 ns pulse during minimum off-time ensures BST capacitor retains sufficient voltage for gate drive even at very light loads. |
| Gate driver for synchronous rectifier | LG output drives external N-MOSFET with 250 mA source / 300 mA sink capability - eliminates diode drop, enabling >90% efficiency at 400 mA. |
Applications
| Telecom Power Conversion | Automotive 42 V Systems |
|---|---|
Use Scenario: Step-down conversion from 48 V telecom bus to 3.3 V or 5 V logic supply in base station line cards. IC Role / Device Role / Timing Role: Primary buck controller managing high-efficiency, high-reliability DC-DC conversion with minimal external components. Use Value: Enables compact, thermally robust design using only one inductor, two capacitors, and three resistors - no compensation network needed. | Use Scenario: Regulation of 42 V battery rail to 12 V or 5 V for infotainment, ADAS sensors, or body control modules. IC Role / Device Role / Timing Role: High-input-voltage buck regulator with programmable UVLO to monitor battery health and signal faults via UVO pin. Use Value: Supports cold-crank operation down to 6 V input while maintaining regulation; thermal shutdown protects against engine bay overheating. |
| Industrial HV Post-Regulation | Secondary Output Generation |
Use Scenario: Secondary regulation stage following an isolated flyback or forward converter delivering 24–75 V intermediate bus. IC Role / Device Role / Timing Role: Non-isolated post-regulator providing precise, ripple-sensitive output for analog or RF subsystems. Use Value: FB pin's 25–50 mV ripple requirement enables stable regulation with low-ESR ceramic output caps - critical for noise-sensitive circuits. | Use Scenario: Generating auxiliary bias rails (e.g., ±15 V, 3.3 V) from main inductor winding using coupled inductors. IC Role / Device Role / Timing Role: Synchronous buck controller operating in continuous conduction mode (CCM) across all loads - ensures fixed-frequency operation for predictable transformer design. Use Value: LG-driven synchronous rectifier guarantees CCM at light loads, enabling accurate secondary winding turns ratio calculation and stable multi-rail generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164PWPR | Wider input range (3–100 V), higher 1 A current limit, but requires external compensation and lacks LG driver. | Used where higher output current or wider VIN is needed; not suitable for synchronous rectifier implementation. | Select LM5164PWPR only if >600 mA output or >75 V input is required; LM5006MMX/NOPB remains optimal for cost-sensitive 48 V/42 V apps with sync-FET support. |
| TPS54260DGQR | Adjustable frequency (100–2500 kHz), integrated soft-start, but no LG driver and lower 60 V max VIN. | Preferred for designs needing programmable soft-start or tighter frequency control; unsuitable for 75 V input or synchronous rectification. | Choose TPS54260DGQR when soft-start sequencing or EMI optimization via frequency dithering is critical; LM5006MMX/NOPB offers simpler layout and higher voltage margin. |
Compared with LM5164PWPR and TPS54260DGQR, LM5006MMX/NOPB uniquely combines 75 V input support, integrated synchronous rectifier driver, and no-loop-compensation operation - making it the most direct solution for compact, high-efficiency 42–48 V buck designs requiring minimal external components and guaranteed CCM operation.
Availability
LM5006MMX/NOPB is available at Aetrix Electronics and suitable for telecom power conversion, automotive 42 V systems, industrial HV post-regulation, and secondary output generation requiring stable component supply and long-term production continuity.
Supply support for LM5006MMX/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 LM5006MMX/NOPB belongs to TI's high-voltage buck regulator product line, designed specifically for efficient, low-component-count DC-DC conversion in 42 V and 48 V systems where simplicity, thermal robustness, and synchronous rectifier support are essential.
FAQ
What is the maximum input voltage rating for the LM5006MMX/NOPB?
The LM5006MMX/NOPB has an absolute maximum input voltage rating of 80 V on the VIN pin, with recommended continuous operation from 6 V to 75 V. This makes LM5006MMX/NOPB suitable for 48 V telecom and 42 V automotive applications, including cold-crank scenarios where input may dip to 6 V. Transient overvoltage tolerance up to 80 V is supported without external clamping.
Does the LM5006MMX/NOPB require external compensation components?
No, the LM5006MMX/NOPB uses a constant on-time control architecture that eliminates the need for external compensation networks. Regulation is achieved by comparing FB voltage to a 2.5 V internal reference and triggering fixed on-time pulses - simplifying design, reducing BOM count, and improving transient response. This core behavior is intrinsic to LM5006MMX/NOPB and confirmed across all operating conditions.
How does the LM5006MMX/NOPB support synchronous rectification?
The LM5006MMX/NOPB provides a dedicated LG (low-side gate) output pin capable of sourcing 250 mA and sinking 300 mA, designed to directly drive the gate of an external N-channel MOSFET used as a synchronous rectifier. Deadtime control (56 ns after SW turn-off, 58 ns before SW turn-on) prevents shoot-through. This feature is integral to LM5006MMX/NOPB and enables >90% efficiency at 400 mA without requiring an external gate driver.
What is the purpose of the pre-charge switch in the LM5006MMX/NOPB?
The pre-charge switch in LM5006MMX/NOPB activates for ~150 ns during the minimum off-time period to ensure the BST capacitor retains sufficient voltage for high-side gate drive - especially critical under light-load conditions or during startup when off-time is extended. This function is built into LM5006MMX/NOPB's internal timing logic and prevents bootstrap failure without external circuitry.
Can the LM5006MMX/NOPB be used with a standard flyback diode instead of a synchronous FET?
Yes, the LM5006MMX/NOPB supports both configurations: it can drive an external synchronous rectifier via the LG pin, or operate with a standard flyback diode connected between SW and RTN. When using a diode, the device operates in discontinuous conduction mode at light loads - a documented operational mode of LM5006MMX/NOPB that maintains efficiency through reduced switching frequency.
LM5006MMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-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):
- 6V
- Voltage - Input (Max):
- 75V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 75V
- Current - Output:
- 600mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
LM5006MMX/NOPB FAQ
1.How can I place an order for LM5006MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5006MMX/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 LM5006MMX/NOPB reliable?
The price and inventory of LM5006MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5006MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LM5006MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5006MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5006MMX/NOPB?
LM5006MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5006MMX/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 LM5006MMX/NOPB?
For technical support, including LM5006MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5006MMX/NOPB requirements.
6.How does Aetrix verify that LM5006MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5006MMX/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 LM5006MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LM5006MMX/NOPB?
All LM5006MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5006MMX/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 LM5006MMX/NOPB part is unused and in its original packaging.
Return procedure for LM5006MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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