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Texas Instruments LM5009MM/NOPB
- Part No.:
- LM5009MM/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM5009MM/NOPB.pdf
- Description:
- IC REG BUCK ADJ 150MA 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,979
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Product details
Overview
LM5009MM/NOPB from Texas Instruments is a wide-input, non-synchronous buck switching regulator with integrated 100-V N-channel MOSFET, 150-mA output current capability, 2.5-V ±2% feedback reference over –40°C to +125°C, and operation from 9.5 V to 95 V input. It delivers stable DC/DC conversion in high-voltage industrial power supplies and LED current sources without loop compensation.
For engineers reviewing the LM5009MM/NOPB datasheet, LM5009MM/NOPB pinout, LM5009MM/NOPB application, or LM5009MM/NOPB equivalent, key selection criteria include its VIN feedforward constant-frequency control, intelligent current limit off-time scaling with VFB, thermal shutdown at 165°C, and dual-package availability (VSSOP-8 and WSON-8) for thermal optimization.
Technical Context
The LM5009MM/NOPB implements a fixed on-time, VIN-inverse control architecture that eliminates need for external loop compensation and enables ultra-fast transient response. Its on-time is set by RON and scales inversely with input voltage, maintaining relatively constant switching frequency across line and load variations.
Current limiting uses a forced off-time generator whose duration is inversely proportional to VFB, delivering short-circuit protection with minimal foldback. The internal 7-V startup regulator powers gate drive circuitry and shuts down when externally biased above 8 V, reducing dissipation in high-VIN applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9.5 V to 95 V - supports rectified 12-V, 24-V, 36-V, and 48-V AC mains and telecom bus rails. |
| Output Current | 150 mA - sufficient for biasing downstream ICs or driving medium-power LEDs without external pass devices. |
| Feedback Reference | 2.5 V ±2% from –40°C to +125°C - enables precise output regulation across automotive and industrial temperature ranges. |
| Switching Frequency | Exceeds 600 kHz - allows compact magnetics and low-profile output filtering in space-constrained designs. |
| Buck Switch RDS(on) | 2.0 Ω (typ) - defines conduction loss at 150 mA; optimized for high-VIN, low-IOUT efficiency. |
| Thermal Shutdown | 165°C with 25°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
| Current Limit Threshold | 0.31 A (typ) - provides robust short-circuit protection while supporting peak startup currents up to 370 mA. |
Pinout & Package
LM5009MM/NOPB is available in thermally enhanced 8-pin WSON (NGU) package (4.00 mm × 4.00 mm) with exposed pad for improved heat dissipation. Pin functions are validated per TI SNVS402I Rev I (May 2021).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Connects to inductor, recirculating diode anode, and BST capacitor; carries full switching current and high dv/dt. |
| BST | Bootstrap supply | Supplies floating gate drive voltage via 0.022-µF ceramic cap to SW; internal diode charges cap during off-time. |
| RCL | Current limit off-time set | Resistor to RTN sets off-time duration inversely proportional to VFB; defaults to 35 µs at VFB = 0 V. |
| FB | Feedback input | Compares output voltage divider ratio to 2.5-V internal reference; <5 nA bias current ensures high-impedance sensing. |
| RTN | Power ground | Common return for all internal circuits and external components; must be low-impedance connection to PCB ground plane. |
| RON/SD | On-time set / shutdown | Resistor to VIN sets on-time; pulled to GND for remote shutdown with 0.4–1.05 V threshold. |
| VCC | Internal regulator output | 7.0-V regulated output powers gate driver; shuts down if externally biased >8 V to reduce dissipation. |
| VIN | Main input | Accepts 9.5–95 V DC; withstands 100-V transients; powers internal startup regulator and switch. |
Key Features
| Feature | Design Value |
|---|---|
| No loop compensation required | Fixed on-time control eliminates external compensation network, reducing BOM count and layout sensitivity. |
| VIN feedforward frequency stability | On-time inversely proportional to VIN maintains ~constant switching frequency across 10:1 input range. |
| Intelligent current limit | Off-time scales with VFB to minimize foldback during overload while ensuring safe 35-µs off-time during short-circuit. |
| Ultra-fast transient response | No compensation + direct FB comparison enables sub-microsecond recovery from load steps. |
| Thermally enhanced WSON package | 4.0 mm × 4.0 mm WSON with exposed pad achieves 42.8°C/W θJA, enabling 150-mA operation without heatsink. |
Applications
| Industrial Power Supply | LED Constant-Current Driver |
|---|---|
Use Scenario: Converting rectified 48-V AC mains to 12-V bias rail for PLC I/O modules in factory automation cabinets. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing stable 12-V/150-mA output; operates at 330 kHz to avoid EMI-sensitive bands. Use Value: Eliminates need for linear regulators and heatsinks, reducing cabinet thermal load and board area by >60% vs. LM7812-based solution. | Use Scenario: Driving strings of high-brightness white LEDs from 36-V vehicle battery or 48-V telecom bus. IC Role / Device Role / Timing Role: Constant-current source using external sense resistor and FB pin; configured for 350-mA LED current via 7.14-Ω sense. Use Value: Maintains ±2% current accuracy over –40°C to +125°C ambient, ensuring consistent luminosity without thermal derating. |
| Heat Sink Eliminator | High-Voltage Telecom Bias |
Use Scenario: Replacing obsolete 78L05 linear regulator in legacy 24-V industrial sensor interface with 5-V/100-mA output. IC Role / Device Role / Timing Role: Wide-input buck converter operating at 9.5–24 V input; delivers 5-V output with <10 mV ripple. Use Value: Reduces junction temperature rise from >70°C to <35°C at full load, enabling sealed enclosure use without forced air. | Use Scenario: Generating 3.3-V logic supply from 48-V telecom backplane for Ethernet PHY and microcontroller. IC Role / Device Role / Timing Role: Primary buck stage feeding secondary LDO; operates at 400 kHz to minimize conducted EMI into sensitive analog circuits. Use Value: Achieves >85% efficiency at 100-mA load, cutting standby power by 65% versus linear solution and extending system uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar non-synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5008MM/NOPB | Lower 80-V max input, 100-mA output, same control architecture and pinout. | Suitable only for ≤80-V systems; not rated for 95-V continuous or 100-V transient conditions. | Select when input never exceeds 80 V and lower cost is prioritized over headroom. |
| LM5163RNTT | Synchronous 0.5-A buck with integrated high-side/low-side FETs; 100-V rating; requires no external diode. | Higher output current, higher efficiency at >100 mA, but larger solution size and higher quiescent current. | Choose for new designs needing >150-mA output or improved light-load efficiency; not drop-in compatible. |
Compared with LM5008MM/NOPB, LM5009MM/NOPB adds 15-V input headroom and 50-mA current margin for robustness in fluctuating industrial mains; compared with LM5163RNTT, it offers smaller footprint and lower BOM count at the expense of synchronous efficiency and current capability.
Availability
LM5009MM/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, LED drivers, telecom bias rails, and high-voltage sensor interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM5009MM/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 decades of expertise in high-reliability power conversion ICs.
The LM5009MM/NOPB belongs to TI's wide-input buck regulator product line, engineered for cost-sensitive, high-voltage industrial and telecom applications where simplicity, thermal efficiency, and transient performance outweigh synchronous efficiency requirements.
FAQ
What is the maximum input voltage rating for LM5009MM/NOPB?
The LM5009MM/NOPB has an absolute maximum input voltage rating of 100 V, with recommended continuous operation from 9.5 V to 95 V. This 100-V rating accommodates transient surges common in rectified AC mains and automotive load-dump events, making LM5009MM/NOPB suitable for harsh industrial environments where voltage spikes exceed nominal bus levels.
Does LM5009MM/NOPB require external loop compensation components?
No, LM5009MM/NOPB does not require external loop compensation components. Its fixed on-time control architecture, where on-time is inversely proportional to VIN, inherently stabilizes the control loop without capacitors or resistors in the feedback path. This simplifies design, reduces bill-of-materials count, and improves immunity to layout parasitics-key advantages confirmed in TI's SNVS402I datasheet Section 7.3.1.
What package options are available for LM5009MM/NOPB?
LM5009MM/NOPB is offered in two thermally optimized packages: 8-pin VSSOP (DGK, 3.0 mm × 3.0 mm) and 8-pin WSON (NGU, 4.0 mm × 4.0 mm with exposed thermal pad). The WSON variant achieves 42.8°C/W θJA, enabling higher ambient operation without heatsinking; both packages share identical pinout and electrical specifications per TI's mechanical documentation.
How does the current limit protection work in LM5009MM/NOPB?
LM5009MM/NOPB implements intelligent current limit protection using a forced off-time generator whose duration scales inversely with FB voltage. At VFB = 0 V (e.g., output short), off-time is fixed at 35 µs; at higher VFB, off-time decreases-reducing foldback and improving recovery. The 0.31-A threshold is sensed internally, with blanking for first 50–70 ns to avoid false triggering during switch turn-on, as detailed in Section 7.3.6 of the LM5009MM/NOPB datasheet.
Can LM5009MM/NOPB be used in LED constant-current applications?
Yes, LM5009MM/NOPB can be configured as a precision LED constant-current driver by connecting the LED string in series with a sense resistor between SW and RTN, then routing the sense voltage to the FB pin. With its 2.5-V ±2% reference and <5 nA FB bias current, LM5009MM/NOPB maintains tight current regulation across temperature-verified in TI's typical application circuits and supported by the device's 150-mA capability and 95-V input headroom for high-string-count configurations.
LM5009MM/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:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 9.5V
- Voltage - Input (Max):
- 95V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 85V
- Current - Output:
- 150mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
LM5009MM/NOPB FAQ
1.How can I place an order for LM5009MM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5009MM/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 LM5009MM/NOPB reliable?
The price and inventory of LM5009MM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5009MM/NOPB is usually 5 days.
3.What payment methods are accepted for LM5009MM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5009MM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5009MM/NOPB?
LM5009MM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5009MM/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 LM5009MM/NOPB?
For technical support, including LM5009MM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5009MM/NOPB requirements.
6.How does Aetrix verify that LM5009MM/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5009MM/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 LM5009MM/NOPB meets industry standards.
7.What is the process for return or replacement of LM5009MM/NOPB?
All LM5009MM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5009MM/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 LM5009MM/NOPB part is unused and in its original packaging.
Return procedure for LM5009MM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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