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Texas Instruments LM3206TL/NOPB
- Part No.:
- LM3206TL/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFBGA
- Datasheet:
-
LM3206TL/NOPB.pdf
- Description:
- IC REG BUCK 3.09V 650MA 8TUSMD
- Quantity:
- Payment:
- Shipping:
Inventory:1,328
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Product details
Overview
LM3206TL/NOPB from Texas Instruments (formerly National Semiconductor) is a synchronous step-down DC-DC converter optimized for single-cell Li-Ion battery-powered portable RF systems. It delivers a fixed 3.09V output at up to 650mA from 2.7V–5.5V input, features 2MHz PWM switching, internal PFET/NFET synchronous rectification, and shutdown current of 0.01µA (typ.). It is used in cellular phone power rails feeding RFIC chipsets.
For engineers reviewing the LM3206TL/NOPB datasheet, LM3206TL/NOPB pinout, LM3206TL/NOPB application, or LM3206TL/NOPB equivalent, key selection criteria include its 3.09V fixed output, 2MHz switching frequency enabling ultra-small external components, micro SMD package footprint, thermal and current protection, and soft-start behavior critical for mobile phone power sequencing.
Technical Context
The LM3206TL/NOPB implements a current-mode buck architecture with integrated P-channel high-side switch (140mΩ typ. RDSON) and N-channel synchronous rectifier (300mΩ typ. RDSON). Regulation is achieved via peak-current-mode control with slope compensation, where the error amplifier modulates PFET on-time based on feedback from the 3.09V reference and FB pin voltage.
It operates exclusively in PWM mode under normal load conditions (0–650mA), with built-in cycle-by-cycle current limiting (1200mA max), thermal shutdown at ~150°C, and soft-start limiting inrush during enable. The EN pin provides digital logic-level control (VIH = 1.2V, VIL = 0.5V) for system-controlled power sequencing without UVLO circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.09V ±2.0% (VFB = 3.09V, min/max 3.028V/3.15V) - enables direct replacement of 3.3V LDOs with higher efficiency in RF supply rails. |
| Max Output Current | 650mA in PWM mode - supports full-power operation of RF transceivers and baseband ICs in handheld radios and cellular handsets. |
| Switching Frequency | 2MHz (1.7–2.3MHz range) - allows use of 2.5×2.0mm inductors and 0603 ceramic capacitors, minimizing PCB area in space-constrained designs. |
| Efficiency | 96% typ. at 3.6VIN, 3.09VOUT, 400mA - achieved via synchronous rectification, reducing conduction loss vs. diode-based buck converters. |
| Shutdown Current | 0.01µA typ. - extends battery life during standby in always-on mobile devices by eliminating quiescent drain from power rail. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single Li-Ion cell (2.7–4.2V) and extended range for USB-powered or boosted battery inputs. |
| Thermal Protection | Junction shutdown at ~150°C, recovery at ~130°C - prevents permanent damage during transient overloads or poor heatsinking in sealed enclosures. |
Pinout & Package
The LM3206TL/NOPB is housed in an 8-bump thin micro SMD package (NS Package Number TLA08HPA), measuring 1.666mm × 1.819mm with 0.3mm solder ball pitch. This chip-scale package requires NSMD pads, precision placement, and infrared-shielded mechanical enclosure due to exposed die edges.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 PVIN | Power input to internal PFET switch | Must be decoupled with low-ESR 10µF ceramic capacitor; connects directly to battery or input source with minimal trace inductance. |
| B1 VDD | Analog supply input | Should be connected to PVIN via local 10µF cap; routing separately from PVIN avoids noise injection into bias circuitry. |
| C1 EN | Enable control input | Logic-compatible digital input (VIH ≥ 1.2V, VIL ≤ 0.5V); pulled low during power-up to prevent unregulated start-up below 2.7V. |
| C2 NC | No-connect terminal | May be left floating, tied to VDD, or connected to SGND - no electrical function; avoid routing signals nearby to prevent coupling. |
| C3 FB | Feedback input for output regulation | Connected directly to output capacitor's positive terminal; requires short, shielded trace to minimize noise-induced regulation error. |
| B3 SGND | Analog and control ground | Separate from PGND; connects to CIN/COUT negative terminals and system analog ground - must not be shorted to PGND under device. |
| A3 PGND | Power ground return | High-current return path for PFET/NFET switches; tied to large copper pour and connected to CIN/COUT negatives via multiple vias. |
| A2 SW | Switch node | Connects to inductor; carries high di/dt PWM waveform - must be routed short and wide, avoiding sensitive analog traces. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated NFET replaces external Schottky diode, reducing forward drop and improving efficiency by >5% at 400mA vs. asynchronous design. |
| Soft-start function | Internal ramp limits inrush current during EN assertion, preventing input voltage sag and system brownout in battery-fed applications. |
| 2MHz fixed-frequency PWM | Enables use of sub-3mm² inductors (e.g., FDK MIPSA2520D3R3) and eliminates audible noise while simplifying EMI filtering. |
| Current overload protection | Cycle-by-cycle limit (1200mA max) plus timed current limit mode prevents destructive inductor saturation during hard shorts or heavy transient loads. |
| Low dropout voltage design | 140mΩ PFET RDSON enables <150mV dropout at 650mA, allowing stable 3.09V output even as Li-Ion discharges to 3.25V. |
Applications
| Cellular Phones | Hand-Held Radios |
|---|---|
Use Scenario: Powering RF front-end modules and baseband processors in GSM/UMTS smartphones during active call or data transmission. IC Role / Device Role / Timing Role: Primary 3.09V supply regulator delivering regulated power to RFIC chipsets with fast load transient response (<50mV pk). Use Value: 96% efficiency at 400mA extends talk time; 2MHz switching minimizes board area occupied by passive components in compact handset layouts. | Use Scenario: Providing stable 3.09V rail to narrowband transceiver ICs in professional two-way radios operating from single Li-Ion cells. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting burst-mode TX operation with rapid line/load transient recovery (50mV pk). Use Value: Soft-start prevents voltage droop during channel switching; thermal shutdown protects against overheating in sealed plastic enclosures. |
| RF PC Cards | Battery Powered RF Devices |
Use Scenario: Generating clean 3.09V supply for mini-PCIe or ExpressCard wireless adapters (Wi-Fi/BT) inserted into laptops or industrial controllers. IC Role / Device Role / Timing Role: Compact DC-DC solution replacing discrete regulators, with micro SMD footprint fitting tight card-edge spacing constraints. Use Value: 0.01µA shutdown current preserves host battery when card is idle; 8-pin micro SMD reduces total solution size vs. QFN alternatives. | Use Scenario: Powering portable spectrum analyzers, RFID readers, or IoT gateways running from rechargeable Li-Ion packs with limited capacity. IC Role / Device Role / Timing Role: Fixed-output buck converter supplying RF signal chain components requiring low-noise, tightly regulated 3.09V. Use Value: Low output ripple (5mVp-p) ensures minimal phase noise degradation in sensitive receiver paths; FB pin layout guidance mitigates noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62067DSGR | 3.0V fixed output (vs. 3.09V); 600mA max output; 2.5MHz switching; 1.2mm × 1.6mm WSON package | Lower output voltage tolerance (±1.5% vs. ±2.0%) and smaller thermal pad - less suited for high-ambient RFIC applications above 85°C ambient | Select when 3.0V output is acceptable and board space is more constrained than voltage accuracy requirements. |
| MAX8640YETA+ | 3.3V fixed output (vs. 3.09V); 600mA max; 2.25MHz switching; 2mm × 2mm TDFN package; no integrated NFET (asynchronous) | Lacks synchronous rectification - 3–5% lower efficiency at 400mA; larger package footprint; requires external Schottky diode | Choose only if 3.3V rail is required and efficiency penalty is acceptable for cost-sensitive, non-battery-critical designs. |
Compared with TPS62067DSGR and MAX8640YETA+, the LM3206TL/NOPB offers tighter 3.09V output matching for legacy RFIC reference voltages, superior 96% efficiency via synchronous design, and proven thermal robustness in mobile phone deployments - making it optimal for space-constrained, battery-life-sensitive RF power rails.
Availability
LM3206TL/NOPB is available at Aetrix Electronics and suitable for cellular phones, hand-held radios, RF PC cards, and battery-powered RF devices requiring stable component supply across production lifecycles.
Supply support for LM3206TL/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 acquired National Semiconductor in 2011 and maintains its high-performance analog and power management portfolio. TI is a global leader in semiconductor innovation with broad manufacturing scale and automotive-grade quality systems.
The LM3206TL/NOPB belongs to National Semiconductor's portable power management product line, designed specifically for ultra-compact, high-efficiency DC-DC conversion in battery-powered RF and mobile communication equipment.
FAQ
What is the recommended input capacitor for LM3206TL/NOPB?
The LM3206TL/NOPB requires a 10µF X5R/X7R ceramic capacitor (e.g., TDK C1608X5R0J106M) placed as close as possible to the PVIN and SGND pins. This capacitor must maintain ≥50% capacitance at rated DC bias and operating temperature, with low ESR to suppress input ripple and support high di/dt switching currents.
Does LM3206TL/NOPB support adjustable output voltage?
No, the LM3206TL/NOPB provides only a fixed 3.09V output. Its feedback reference is trimmed internally and not accessible externally; there is no resistor-divider configuration option. For adjustable output, consider TI's LM3205 or similar programmable buck regulators.
Can LM3206TL/NOPB operate below 2.7V input?
No - the LM3206TL/NOPB has a minimum operating input voltage of 2.7V. Below this, regulation is lost and the device may behave unpredictably. System design must ensure EN remains low until PVIN exceeds 2.7V, as the part lacks built-in UVLO circuitry.
What is the thermal resistance (θJA) of LM3206TL/NOPB in its micro SMD package?
The LM3206TL/NOPB in the TLA08HPA micro SMD package has a junction-to-ambient thermal resistance (θJA) of 100°C/W, measured on a 4-layer JEDEC-standard test board (4" × 4", 2/1/1/2 oz Cu). Actual θJA in end equipment will vary based on PCB copper area, airflow, and proximity to heat sources.
Is LM3206TL/NOPB RoHS-compliant and lead-free?
Yes, the LM3206TL/NOPB is RoHS-compliant and lead-free, as indicated by the "/NOPB" suffix per TI's packaging nomenclature. It uses lead-free solder balls in its micro SMD construction and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements.
LM3206TL/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.25V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.09V
- Voltage - Output (Max):
- -
- Current - Output:
- 650mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TuSMD
LM3206TL/NOPB FAQ
1.How can I place an order for LM3206TL/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3206TL/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 LM3206TL/NOPB reliable?
The price and inventory of LM3206TL/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3206TL/NOPB is usually 5 days.
3.What payment methods are accepted for LM3206TL/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3206TL/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3206TL/NOPB?
LM3206TL/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3206TL/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 LM3206TL/NOPB?
For technical support, including LM3206TL/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3206TL/NOPB requirements.
6.How does Aetrix verify that LM3206TL/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3206TL/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 LM3206TL/NOPB meets industry standards.
7.What is the process for return or replacement of LM3206TL/NOPB?
All LM3206TL/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3206TL/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 LM3206TL/NOPB part is unused and in its original packaging.
Return procedure for LM3206TL/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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