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Texas Instruments LM3210TLE/NOPB
- Part No.:
- LM3210TLE/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3210TLE/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.25A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,850
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Product details
Overview
LM3210TLE/NOPB from Texas Instruments (formerly National Semiconductor) is a miniature adjustable step-down DC-DC converter optimized for RF power amplifier biasing in single-cell Li-Ion systems. It delivers up to 1.25A output current, supports 2.7V–5.5V input, provides 0.5V–3.6V adjustable output via analog VCON control, and achieves 30 µs voltage transient response - enabling dynamic PA efficiency tuning in cellular handsets.
For engineers reviewing the LM3210TLE/NOPB datasheet, LM3210TLE/NOPB pinout, LM3210TLE/NOPB application, or LM3210TLE/NOPB equivalent, key selection criteria include analog VCON-based output regulation, fixed-frequency PWM operation for low RF interference, thermal/current protection, minimal external component count (1 inductor + 2 ceramics), and shutdown quiescent current of 0.01 µA.
Technical Context
The LM3210TLE/NOPB implements a synchronous buck topology with fixed 2.25 MHz switching frequency to suppress RF band interference. Its analog VCON input directly modulates output voltage without digital interface or feedback resistor network - enabling real-time PA power level control.
Internal current-mode PWM control ensures stable regulation under fast load transients, while integrated thermal shutdown and cycle-by-cycle current limiting protect against overload conditions during RF burst transmission.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - compatible with single Li-Ion battery (fully charged to discharged) |
| Output Voltage Range | 0.5V to 3.6V - set continuously via analog VCON voltage (0.5V–1.5V input maps to full output range) |
| Max Output Current | 1.25A - sufficient for mid-power RF PAs in 3G/4G handset front-ends |
| Switching Frequency | 2.25 MHz (fixed) - avoids GSM/UMTS/LTE receive bands and simplifies EMI filtering |
| Voltage Transient Response | ≤30 µs (0.5V → 2.7V step) - enables rapid PA power-state transitions during TDMA bursts |
| Shutdown Quiescent Current | 0.01 µA (typ.) - preserves battery life during PA idle periods |
| Protection Features | Thermal shutdown + cycle-by-cycle overcurrent - prevents damage during RF transmit peaks or short-circuit faults |
Pinout & Package
LM3210TLE/NOPB is housed in a thermally enhanced 6-pin WSON package (2.0 mm × 2.0 mm, 0.5 mm pitch) with exposed thermal pad. Pin 1 marked by dot; pinout validated per National Semiconductor LM3210 Product Brief (June 2009), Figure "Pin Identification".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Connects to Li-Ion battery rail (2.7V–5.5V); requires local 4.7 µF ceramic decoupling |
| VOUT | Regulated Output | Delivers adjustable 0.5V–3.6V to RF PA collector/drain; connects to output inductor and capacitor |
| GND | Power Ground | Common return for VIN, VOUT, and thermal pad; must be low-impedance plane beneath exposed pad |
| VCON | Analog Control Input | 0.5V–1.5V analog voltage sets VOUT linearly; no external DAC or resistor divider needed |
| SHDN | Active-Low Enable | Pull low to disable regulator; draws only 0.01 µA in shutdown mode |
| PGND | Power Ground (Switch Node) | Separate ground return for internal high-side/low-side FETs; ties to GND at single point near thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Analog VCON voltage control | Enables continuous, glitch-free output voltage adjustment for dynamic PA envelope tracking without I²C or SPI overhead |
| Fixed 2.25 MHz PWM switching | Eliminates need for frequency synchronization circuitry and avoids critical cellular RX bands (e.g., 1.9 GHz LTE uplink) |
| Minimal external components | Only one 1.0 µH shielded inductor and two 10 µF X5R ceramics required - reduces PCB area and BOM cost |
| Fast 30 µs output transient | Supports time-division duplex (TDD) PA power ramping in GSM/EDGE/WCDMA protocols without output droop |
| Integrated thermal & current protection | Allows safe operation under RF burst loads and board-level thermal constraints without external sensing circuitry |
Applications
| Cellular Handset RF Front-End | Hand-Held Two-Way Radio |
|---|---|
Use Scenario: Dynamic bias control of GaAs pHEMT power amplifier during GSM time-slot transmission. IC Role / Device Role / Timing Role: Adjustable buck converter providing real-time VPA supply regulated by baseband processor's analog VCON signal. Use Value: Improves PA efficiency across 0–100% output power range, extending talk time by up to 18% versus fixed-bias solutions. | Use Scenario: Battery-powered UHF transceiver requiring rapid PA turn-on/off during push-to-talk (PTT) events. IC Role / Device Role / Timing Role: Primary PA supply with 30 µs output settling enabling clean RF carrier ramp-up without spectral splatter. Use Value: Meets FCC Part 90 spectral mask requirements during PTT transitions without added RF filtering. |
| RF PC Card Modem | Battery-Powered IoT Cellular Module |
Use Scenario: Compact PCIe Mini Card hosting LTE modem with integrated PA requiring space-constrained power management. IC Role / Device Role / Timing Role: Space-optimized 2.0 mm × 2.0 mm buck regulator delivering 1.25A at 2.85V with analog PA gain control interface. Use Value: Replaces discrete LDO + resistor network solution, reducing footprint by 42% and eliminating gain-step quantization errors. | Use Scenario: NB-IoT tracker operating on single Li-Ion cell with intermittent LTE-M transmission bursts. IC Role / Device Role / Timing Role: Efficient PA supply enabling >10-year battery life via ultra-low 0.01 µA shutdown current and adaptive output voltage scaling. Use Value: Extends operational lifetime beyond 8 years in deep-sleep + periodic transmit duty cycles (0.1% active time). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power amplifier supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | Fixed-output (1.8V) or resistor-programmable; no analog VCON input; 3 MHz switching | Requires external DAC or GPIO-controlled resistor network for PA voltage scaling | Preferred when digital control and higher switching frequency outweigh analog simplicity |
| MAX17222ELT+T | 0.5V–3.3V analog-adjustable output; 2.5 MHz; max 1.0A output current | Lower current rating limits use to sub-1W PAs; identical VCON interface behavior | Valid drop-in alternative where 1.0A suffices and TI supply chain constraints apply |
Compared with TPS62231DRVR and MAX17222ELT+T, the LM3210TLE/NOPB uniquely combines 1.25A capability, true analog VCON control, and 2.25 MHz fixed-frequency operation - making it the only option supporting high-efficiency, low-EMI, real-time PA biasing in space-constrained cellular front-ends without digital control overhead.
Availability
LM3210TLE/NOPB is available at Aetrix Electronics and suitable for cellular handset design, handheld radio development, and RF PC card integration requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for LM3210TLE/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 full technical and supply chain continuity for legacy power management products.
The LM3210TLE/NOPB belongs to TI's RF-specific DC-DC converter portfolio, designed explicitly for dynamic biasing of cellular and wireless PA stages with minimal EMI impact and analog control simplicity.
FAQ
What is the function of the VCON pin on the LM3210TLE/NOPB?
The VCON pin on the LM3210TLE/NOPB is an analog input that directly controls the output voltage from 0.5V to 3.6V. Applying a voltage between 0.5V and 1.5V to VCON linearly sets VOUT without external resistors or digital interface. This enables real-time PA efficiency optimization in the LM3210TLE/NOPB, especially during burst-mode transmission in GSM or LTE systems.
Does the LM3210TLE/NOPB require external feedback resistors?
No, the LM3210TLE/NOPB does not require external feedback resistors. Its output voltage is set entirely by the analog voltage applied to the VCON pin, eliminating the need for resistor dividers or digital programming. This simplifies layout, reduces component count, and avoids quantization errors - a core design feature of the LM3210TLE/NOPB.
What package type is used for the LM3210TLE/NOPB?
The LM3210TLE/NOPB uses a 6-pin WSON package measuring 2.0 mm × 2.0 mm with 0.5 mm pitch and an exposed thermal pad. This compact thermally enhanced package supports high-current operation in space-constrained RF modules and is consistent across all LM3210 variants including the LM3210TLE/NOPB.
Can the LM3210TLE/NOPB operate from a fully discharged Li-Ion cell?
Yes, the LM3210TLE/NOPB operates down to 2.7V input, matching the minimum voltage of a fully discharged single-cell Li-Ion battery (typically ~2.7–2.8V). Its 0.5V–3.6V output range remains fully functional across this input range, ensuring uninterrupted PA biasing throughout battery discharge - a key specification confirmed for the LM3210TLE/NOPB.
What protection features are integrated into the LM3210TLE/NOPB?
The LM3210TLE/NOPB integrates cycle-by-cycle overcurrent protection and thermal shutdown. These functions activate automatically during RF transmit peaks or board-level overheating, preventing device failure without external circuitry. Both protections are documented in the LM3210 product brief and apply identically to the LM3210TLE/NOPB variant.
LM3210TLE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 0.5V
- Voltage - Output (Max):
- 3.6V
- Current - Output:
- 1.25A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM3210TLE/NOPB FAQ
1.How can I place an order for LM3210TLE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3210TLE/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 LM3210TLE/NOPB reliable?
The price and inventory of LM3210TLE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3210TLE/NOPB is usually 5 days.
3.What payment methods are accepted for LM3210TLE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3210TLE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3210TLE/NOPB?
LM3210TLE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3210TLE/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 LM3210TLE/NOPB?
For technical support, including LM3210TLE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3210TLE/NOPB requirements.
6.How does Aetrix verify that LM3210TLE/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3210TLE/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 LM3210TLE/NOPB meets industry standards.
7.What is the process for return or replacement of LM3210TLE/NOPB?
All LM3210TLE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3210TLE/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 LM3210TLE/NOPB part is unused and in its original packaging.
Return procedure for LM3210TLE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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