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Texas Instruments LM3207TL/NOPB
- Part No.:
- LM3207TL/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 9-WFBGA
- Datasheet:
-
LM3207TL/NOPB.pdf
- Description:
- IC REG BUCK ADJ 650MA 9DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,549
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Product details
Overview
LM3207TL/NOPB from Texas Instruments is a 650mA synchronous step-down DC-DC converter with integrated 10mA VREF LDO, optimized for RF power amplifier biasing in single-cell Li-ion systems (2.7V–5.5V input). It delivers dynamically adjustable output (0.8V–3.6V) via analog VCON control and achieves 95% efficiency at 3.9VIN/3.4VOUT/400mA in PWM mode. Used in cellular handsets to modulate PA supply voltage for battery life extension.
For engineers reviewing the LM3207TL/NOPB datasheet, LM3207TL/NOPB pinout, LM3207TL/NOPB application, or LM3207TL/NOPB equivalent, this page provides verified technical context, validated pin functions, confirmed RF PA use cases, and real-world LDO transient performance (3µs turn-on), all extracted from TI's SNVS400A datasheet and micro SMD package documentation.
Technical Context
The LM3207TL/NOPB integrates a current-mode buck regulator with internal P-channel and N-channel MOSFETs (RDS(ON) = 230mΩ / 485mΩ) and a dedicated 2.53V or 2.875V LDO for RF reference voltage generation. Its 2MHz switching frequency enables compact 3.0µH inductor and 4.7µF ceramic output capacitor implementation.
Operation relies on analog VCON-controlled gain (2.5V/V) to set output voltage without external resistors, while dual enable inputs (EN and ENLDO) provide independent PWM and LDO shutdown. Thermal shutdown activates at 150°C and recovers at 130°C, and cycle-by-cycle current limiting caps peak switch current at 1200mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports full discharge curve of single Li-ion cell without external regulation. |
| Output Voltage Range | 0.8V to 3.6V - programmable via 0.32V–1.44V analog VCON input with 2.5V/V gain, eliminating feedback resistors. |
| Max Output Current | 650mA - sustained PWM load capability with thermal protection active above 125°C junction temperature. |
| LDO Output | 2.53V or 2.875V ±2.6% - regulated reference for linear RF PAs, delivering up to 10mA with 3µs turn-on time. |
| Switching Frequency | 2MHz (typ.) - enables use of miniature 0603/0805 passives and reduces EMI in IF-sensitive RF bands. |
| Efficiency | 95% (typ.) at 3.9VIN/3.4VOUT/400mA - achieved via synchronous rectification and low RDS(ON) FETs. |
| Shutdown Current | 0.01µA (typ.) - ultra-low quiescent draw when EN = low, critical for standby battery longevity. |
Pinout & Package
LM3207TL/NOPB uses a 9-bump lead-free thin micro SMD package (TLA09TTA, 1.2mm × 1.2mm, 0.4mm pitch) with bottom-side solder bumps. Package requires controlled reflow and opaque-board mounting per TI assembly guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 PVIN | Power Input | Main supply rail connection for buck converter; accepts 2.7V–5.5V with −0.2V to +6.0V absolute max rating. |
| B1 ENLDO | Digital Enable | Active-high LDO control; must be high *and* EN high to activate 2.53V/2.875V reference output. |
| C1 FB | Analog Feedback | Connects to output filter capacitor node; sets regulation point in closed-loop operation. |
| C2 VCON | Analog Control | 0.32V–1.44V input controlling VOUT via 2.5V/V gain; enables dynamic PA voltage scaling. |
| C3 LDO | LDO Output | Delivers regulated 2.53V or 2.875V reference (±2.6%) to RF PA bias circuitry; max 10mA load. |
| B3 SGND | Analog Ground | Reference ground for FB, VCON, EN, ENLDO; must be separated from PGND in layout. |
| A3 PGND | Power Ground | High-current return path for SW node and internal FETs; connects to inductor ground pad. |
| A2 SW | Switch Node | Internal PFET/NFET connection point; drives external inductor with 1200mA peak current limit. |
| B2 EN | Digital Enable | Active-high PWM controller enable; <0.5V disables entire IC, reducing IQ to 0.01µA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated VREF LDO | Provides stable 2.53V/2.875V reference with 3µs turn-on and 50dB PSRR at 1kHz for RF PA biasing. |
| VCON-Controlled Output | Eliminates external feedback resistors; enables real-time PA efficiency optimization across transmit power levels. |
| Synchronous Rectification | Reduces conduction loss vs. diode rectification-critical for >90% efficiency at low VOUT (e.g., 0.8V). |
| 2MHz Fixed-Frequency PWM | Minimizes EMI coupling into adjacent RF receivers while allowing 0603-size ceramic capacitors and 3.0µH inductors. |
| Thermal & Overcurrent Protection | Auto-shutdown at 150°C junction temp and 1200mA peak switch current prevents damage during PA burst loads. |
Applications
| Cellular Handset PA Biasing | Hand-Held Radio Transmitter |
|---|---|
Use Scenario: Dynamic supply voltage adjustment for WCDMA/CDMA power amplifiers during varying RF link conditions. IC Role / Device Role / Timing Role: Primary DC-DC converter generating programmable VPA and secondary LDO supplying precise VREF to linear PA stages. Use Value: Extends talk time by reducing PA supply voltage during low-power transmission without sacrificing linearity or ACLR. |
Use Scenario: Compact, battery-powered two-way radio requiring efficient, low-noise PA bias under intermittent duty cycles. IC Role / Device Role / Timing Role: Synchronous buck regulator delivering 650mA pulsed load current with fast LDO turn-on (<3µs) for PA enable sequencing. Use Value: Enables rapid PA activation with minimal voltage droop, preserving modulation fidelity during short TX bursts. |
| RF PC Card Power Management | Battery-Powered IoT Transceiver |
Use Scenario: Space-constrained PCMCIA/ExpressCard module integrating RF front-end with tight thermal envelope. IC Role / Device Role / Timing Role: Micro SMD-packaged DC-DC + LDO combo providing isolated, low-ripple VPA and VREF from shared Li-ion rail. Use Value: Achieves 1.2mm × 1.2mm footprint and 2MHz operation to avoid interference with card bus timing and host CPU clocks. |
Use Scenario: Low-duty-cycle LPWAN node (e.g., NB-IoT, LoRa) transmitting brief high-power bursts from coin-cell or small Li-ion. IC Role / Device Role / Timing Role: High-efficiency buck converter with ultra-low shutdown current (0.01µA) preserving battery during 99% sleep time. Use Value: Delivers 650mA peak TX current while maintaining >10-year shelf life on primary lithium chemistry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power amplifier DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62260DRVR | Single-output 600mA buck only; no integrated LDO; 2.25MHz switching; requires external feedback resistors. | Lacks VREF LDO and VCON interface-requires separate LDO and DAC for PA voltage control. | Select when LDO is already present or PA architecture uses digital voltage control instead of analog VCON. |
| TPS62400DRCR | Dual-output (600mA + 300mA); includes tracking LDO but no VCON interface; 2.25MHz; different pinout and control logic. | Supports dual-rail PA bias but cannot dynamically scale main VPA without external DAC and op-amp. | Choose for multi-band PAs needing independent VPA and VDRV rails where analog VCON control is unnecessary. |
Compared with TPS62260DRVR and TPS62400DRCR, LM3207TL/NOPB uniquely integrates VCON-based analog voltage programming and a matched VREF LDO in one micro SMD package-reducing BOM count by three components (LDO, DAC, resistor divider) and enabling true RF PA efficiency optimization without firmware intervention.
Availability
LM3207TL/NOPB is available at Aetrix Electronics and suitable for cellular handset design, handheld radio development, and RF PC card integration requiring stable component supply and long-term lifecycle support.
Supply support for LM3207TL/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 RF power solutions heritage.
The LM3207TL/NOPB belongs to TI's RF power management product line, engineered specifically for dynamic biasing of WCDMA/CDMA power amplifiers in space-constrained mobile devices using single Li-ion cells.
FAQ
What is the exact LDO output voltage option for LM3207TL/NOPB?
The LM3207TL/NOPB is factory-configured for 2.53V LDO output (±2.6% over load and temperature), as confirmed in TI's SNVS400A datasheet Electrical Characteristics table. This matches the "2.53 Option" performance curves and is distinct from the 2.875V variant (LM3207TL-2.875/NOPB). The LDO delivers up to 10mA with 3µs turn-on time when ENLDO and EN are both asserted.
Does LM3207TL/NOPB require external feedback resistors to set output voltage?
No. LM3207TL/NOPB eliminates external feedback resistors via its analog VCON pin: applying 0.32V–1.44V (with 2.5V/V gain) directly programs VOUT from 0.8V to 3.6V. This is verified in the "Dynamically Adjustable Output Voltage" section of the datasheet and confirmed by the absence of resistor-divider pins in the pinout table. External resistors are unnecessary and not supported.
What is the maximum allowable input voltage for LM3207TL/NOPB?
The absolute maximum PVIN rating for LM3207TL/NOPB is +6.0V (relative to SGND), but the recommended operating range is strictly 2.7V to 5.5V per the datasheet Operating Ratings table. Exceeding 5.5V risks violating functional specifications-even briefly-due to internal FET oxide stress and thermal limits. System design must ensure input never exceeds 5.5V under all conditions including load dump or hot-swap transients.
How does thermal protection operate in LM3207TL/NOPB?
LM3207TL/NOPB features automatic thermal shutdown: operation halts when junction temperature reaches 150°C (typ.), turning off both PWM switches and the LDO. Recovery occurs autonomously at 130°C (typ.), restoring full functionality. This behavior is documented in the Absolute Maximum Ratings and Thermal Properties sections, and is independent of EN or ENLDO states-ensuring robustness during sustained overload or poor PCB heatsinking.
Can LM3207TL/NOPB drive a 650mA continuous load at 3.6V output?
Yes-LM3207TL/NOPB is rated for 650mA maximum load in PWM mode per the datasheet Applications section and System Characteristics table. However, sustained 650mA at 3.6VOUT requires careful thermal design: θJA = 100°C/W means ~6.5W dissipation at worst-case 5.5VIN, raising junction temperature significantly. Use of 3.0µH inductor (FDK MIPW3226D3R0M) and proper copper pour per TI layout guidelines is mandatory to maintain reliability.
LM3207TL/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-WFBGA
- 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):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.6V
- 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:
- 9-DSBGA
LM3207TL/NOPB FAQ
1.How can I place an order for LM3207TL/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3207TL/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 LM3207TL/NOPB reliable?
The price and inventory of LM3207TL/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3207TL/NOPB is usually 5 days.
3.What payment methods are accepted for LM3207TL/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3207TL/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3207TL/NOPB?
LM3207TL/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3207TL/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 LM3207TL/NOPB?
For technical support, including LM3207TL/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3207TL/NOPB requirements.
6.How does Aetrix verify that LM3207TL/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3207TL/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 LM3207TL/NOPB meets industry standards.
7.What is the process for return or replacement of LM3207TL/NOPB?
All LM3207TL/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3207TL/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 LM3207TL/NOPB part is unused and in its original packaging.
Return procedure for LM3207TL/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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