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Texas Instruments LM5006MM/NOPB
- Part No.:
- LM5006MM/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM5006MM/NOPB.pdf
- Description:
- IC REG BUCK ADJ 600MA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:465
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Product details
Overview
LM5006MM/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. Designed for telecom and automotive 42 V/48 V bus regulation.
For engineers reviewing the LM5006MM/NOPB datasheet, LM5006MM/NOPB pinout, LM5006MM/NOPB application, or LM5006MM/NOPB equivalent, key selection considerations include input voltage range (6–75 V), no-loop-compensation operation, adjustable 2.5 V reference-based output (≥2.5 V), intelligent current limit with inverse-VOUT off-time, and thermal shutdown at 165 °C.
Technical Context
The LM5006MM/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.
Current limiting employs a non-resettable off-timer whose duration is inversely proportional to VFB - ensuring longer off-times during short-circuit (VFB ≈ 0 V) and shorter off-times under moderate overload. The integrated pre-charge switch (150 ns) maintains BST capacitor charge during light-load or startup conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 75 V - supports 42 V automotive and 48 V telecom primary rails with 80 V absolute max switch rating. |
| Switch Current Limit | 700–1500 mA - enables robust 600 mA continuous output with short-circuit foldback mitigation. |
| Feedback Reference | 2.5 V ±2.5% - sets precise output voltage via resistor divider; enables 2.5 V minimum adjustable output. |
| Operating Frequency | Constant with line/load - achieved via VIN-inverse on-time; typical 300 kHz at VIN = 48 V, RT = 261 kΩ. |
| VCC Regulator | 7.5 V / 30 mA - powers internal gate drivers and logic; eliminates need for external bias supply. |
| Thermal Shutdown | 165 °C with 20 °C hysteresis - protects against sustained overload or poor PCB thermal design. |
| UVLO Threshold | 2.5 V ±0.1 V at UV pin - programmable input undervoltage detection with open-drain UVO status flag. |
Pinout & Package
LM5006MM/NOPB is housed in a 10-lead VSSOP (Very Small Outline Package) with 0.5 mm pitch, optimized for high-voltage DC-DC conversion in space-constrained industrial and automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switching node | Connects to inductor, bootstrap capacitor (BST–SW), and synchronous FET drain; carries full switching current and voltage transients. |
| 2 BST | Bootstrap supply | Charged from VCC via internal diode when SW is low; supplies floating gate drive for high-side N-MOSFET. |
| 3 LG | Low-side gate driver | Drives external N-MOSFET source-to-ground for synchronous rectification; 56 ns deadtime ensures shoot-through prevention. |
| 4 RTN | Power ground | Main return path for switch current, VCC, and feedback network; requires low-impedance PCB connection. |
| 5 UV | UV detector input | Accepts resistor-divider voltage from VIN or other rail; internal 5 µA hysteresis current enables clean threshold transition. |
| 6 UVO | UV status flag | Open-drain output pulled low when UV < 2.5 V, VCC UVLO active, or RT/SD asserted - signals fault to system controller. |
| 7 FB | Feedback input | Inverting input of regulation comparator; 1 nA bias current enables high-impedance resistor divider design. |
| 8 RT/SD | On-time set & shutdown | Resistor to VIN sets on-time (and thus frequency); grounded to disable regulator with <70 µA shutdown current. |
| 9 VCC | Bias supply output | Internally regulated 7.5 V supply; requires 1 µF ceramic capacitor to RTN for stability and transient response. |
| 10 VIN | Main power input | Accepts 6–75 V DC input; withstands 80 V transients; powers both switch and internal regulators. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Constant on-time control eliminates external compensation components, reducing BOM count and layout sensitivity. |
| Ultra-fast transient response | On-demand switching pulses respond within nanoseconds to FB voltage droop, minimizing output voltage deviation during load steps. |
| Programmable input UV detector | Resistor-divider on UV pin sets custom turn-on/off thresholds; UVO flag provides system-level fault signaling without microcontroller polling. |
| Pre-charge switch for bootstrap | 150 ns internal pulse during minimum off-time ensures reliable BST capacitor recharge under light-load or pre-biased start-up conditions. |
| Gate driver for synchronous rectifier | LG output drives external N-MOSFET with 250 mA source / 300 mA sink capability - enables >90% efficiency at 400 mA output. |
Applications
| Telecom Power Conversion | Automotive 42 V Systems |
|---|---|
Use Scenario: Regulating 48 V telecom backplane to 12 V or 5 V for base station interface cards and remote radio units. IC Role / Device Role / Timing Role: Primary buck controller managing high-efficiency step-down with fast transient recovery during burst-mode traffic loads. Use Value: Delivers stable 600 mA output across wide input range while maintaining constant frequency and eliminating compensation tuning effort. | Use Scenario: Powering infotainment ECUs, ADAS sensors, or body control modules from 42 V battery systems in next-gen vehicles. IC Role / Device Role / Timing Role: High-reliability DC-DC converter handling cold-crank (6 V) to load-dump (75 V) conditions without latch-up or reset. Use Value: Integrated 80 V switch and thermal shutdown ensure safe operation under automotive stress profiles; UVLO prevents brownout resets. |
| Industrial HV Post-Regulation | Secondary Output Generation |
Use Scenario: Generating isolated auxiliary rails (e.g., ±15 V, 3.3 V) from unregulated 60–70 V intermediate bus in PLC or motor drive power supplies. IC Role / Device Role / Timing Role: Non-isolated post-regulator providing tightly regulated bias for gate drivers, op-amps, and communication ICs. Use Value: Precision 2.5 V reference and ±2.5% tolerance enable accurate output setting; low 1 nA FB bias minimizes divider error. | Use Scenario: Adding a secondary output winding on main inductor to generate auxiliary 3.3 V rail alongside primary 12 V output in compact power architecture. IC Role / Device Role / Timing Role: Enabling CCM-only operation via synchronous rectification (LG-driven FET), ensuring predictable transformer coupling and ripple behavior. Use Value: Constant-frequency operation under all loads allows reliable secondary winding design; LG deadtime control prevents cross-conduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5010AMM/NOPB | Higher 100 V switch rating; same VSSOP-10 package; 1 A current limit; requires external bootstrap diode. | Supports wider input range (8–100 V); better suited for 72 V industrial or aerospace inputs. | Select when input may exceed 75 V or higher output current (>600 mA) is required; verify bootstrap circuit compatibility. |
| TPS54260DGQ | 60 V max input; integrated 2.6 A MOSFET; current-mode control; requires compensation; SOIC-8 package. | Lacks UV status flag and synchronous rectifier driver; lower voltage rating limits use in 48 V telecom. | Choose for cost-sensitive, lower-voltage (<60 V) designs where loop compensation is acceptable and higher peak current is needed. |
Compared with LM5006MM/NOPB, LM5010AMM/NOPB extends input range and current capability but adds external component overhead, while TPS54260DGQ trades voltage headroom and feature set for higher integration and lower cost in sub-60 V applications.
Availability
LM5006MM/NOPB is available at Aetrix Electronics and suitable for telecom power conversion, automotive 42 V systems, and industrial HV post-regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM5006MM/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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The LM5006MM/NOPB belongs to TI's high-voltage DC-DC controller product line, engineered for efficient, compact, and robust step-down regulation in harsh-input environments such as telecom infrastructure and automotive electrical systems.
FAQ
What is the minimum on-time specification for LM5006MM/NOPB and why does it matter?
The LM5006MM/NOPB has a minimum on-time of 200 ns at maximum input voltage (75 V). This parameter directly constrains the maximum achievable switching frequency - for example, at 75 V input and 12 V output, the theoretical max frequency is ~667 kHz. Designers must select RT to ensure on-time stays above this limit to maintain proper current limit functionality and avoid erratic operation.
How does the LM5006MM/NOPB achieve ultra-fast transient response without loop compensation?
The LM5006MM/NOPB achieves ultra-fast transient response by using constant on-time control: each time the FB voltage falls below 2.5 V, a fixed on-time pulse is issued immediately. There is no delay from error amplifier settling or compensation network dynamics. This direct, cycle-by-cycle response minimizes output voltage deviation during rapid load changes - a key advantage over traditional voltage-mode or current-mode controllers.
Can LM5006MM/NOPB operate with only a flyback diode, or is a synchronous rectifier mandatory?
The LM5006MM/NOPB supports both configurations: it can drive an external synchronous rectifier via the LG pin, or operate with a standard flyback diode. With a diode, the converter operates in discontinuous conduction mode at light loads, lowering switching losses. With LG driving an N-MOSFET, it forces continuous conduction mode across all loads - improving efficiency and stabilizing frequency. Neither configuration is mandatory; choice depends on efficiency, cost, and EMI requirements.
What is the role of the pre-charge switch in LM5006MM/NOPB and when is it active?
The pre-charge switch in LM5006MM/NOPB applies a 150 ns pulse between SW and RTN during the minimum off-time period. It ensures the BST capacitor retains sufficient charge when off-times are extended - such as during light-load operation or startup with pre-biased outputs. This prevents gate drive failure due to BST voltage sag below the 2.15 V gate-drive UVLO threshold, enhancing reliability in real-world dynamic conditions.
How is the UVLO threshold programmed on LM5006MM/NOPB, and what happens when it triggers?
The UVLO threshold on LM5006MM/NOPB is programmed using a resistor divider from VIN to the UV pin, setting the trip point near 2.5 V. When UV drops below threshold, the internal 5 µA current source activates, creating hysteresis. Simultaneously, the open-drain UVO pin pulls low - signaling undervoltage to external logic. The regulator continues normal operation unless VCC UVLO or RT/SD shutdown also occurs; UVO status is independent of regulator enable state.
LM5006MM/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
LM5006MM/NOPB FAQ
1.How can I place an order for LM5006MM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5006MM/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 LM5006MM/NOPB reliable?
The price and inventory of LM5006MM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5006MM/NOPB is usually 5 days.
3.What payment methods are accepted for LM5006MM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5006MM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5006MM/NOPB?
LM5006MM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5006MM/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 LM5006MM/NOPB?
For technical support, including LM5006MM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5006MM/NOPB requirements.
6.How does Aetrix verify that LM5006MM/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5006MM/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 LM5006MM/NOPB meets industry standards.
7.What is the process for return or replacement of LM5006MM/NOPB?
All LM5006MM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5006MM/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 LM5006MM/NOPB part is unused and in its original packaging.
Return procedure for LM5006MM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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