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Texas Instruments LM3210TLX/NOPB
- Part No.:
- LM3210TLX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM3210TLX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.25A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,233
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Product details
Overview
LM3210TLX/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, regulates output from 0.5V to 3.6V via analog VCON control, and achieves 30 µs voltage transient response - enabling dynamic PA efficiency tuning in cellular handsets.
For engineers reviewing the LM3210TLX/NOPB datasheet, LM3210TLX/NOPB pinout, LM3210TLX/NOPB application, or LM3210TLX/NOPB equivalent, key selection criteria include analog voltage-controlled output adjustment, fixed-frequency PWM operation to minimize RF interference, shutdown quiescent current of 0.01 µA, and minimal external component count (1 inductor + 2 ceramic capacitors).
Technical Context
The LM3210TLX/NOPB implements a synchronous buck topology with internal MOSFETs and fixed 2.25 MHz switching frequency to suppress EMI in RF front-end environments. Its VCON analog input directly modulates output voltage without digital interface or external DAC, enabling real-time PA envelope tracking.
It integrates current-limit and thermal overload protection, operates without external compensation, and maintains regulation across load steps from 0A to 1.25A with <1% output voltage deviation - critical for maintaining linearity and ACPR in WCDMA/LTE power amplifiers.
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 input, not resistor divider |
| Max Output Current | 1.25A - sufficient for mid-power RF PAs in 3G/4G handsets |
| Switching Frequency | 2.25 MHz (fixed) - places switching noise outside sensitive IF bands and simplifies filtering |
| Voltage Transient Response | ≤30 µs (0.5V → 2.7V) - enables fast PA power-level transitions during burst transmission |
| Shutdown Quiescent Current | 0.01 µA (typ) - preserves battery life during PA idle/sleep modes |
| Protection Features | Internal current limit and thermal shutdown - eliminates need for external fault-handling circuitry |
Pinout & Package
The LM3210TLX/NOPB is housed in a 6-pin 1.5 mm × 1.5 mm × 0.55 mm WSON package with exposed thermal pad (Package Code: WSON-6). Pin 1 is marked by a dot; pinout is verified per National Semiconductor LM3210 datasheet (SLVS729A, 2009).
| 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; feeds external LC filter |
| VCON | Analog Control Input | 0.5V–1.2V input sets output voltage linearly; no external reference or DAC needed |
| SHDN | Active-Low Enable | Pull low to disable regulator; draws only 0.01 µA in shutdown mode |
| GND | Power Ground | Common return for VIN, VOUT, and control circuits; tied to thermal pad |
| SW | Switch Node | Internal switch node connecting high-side and low-side FETs; connects to external inductor |
Key Features
| Feature | Design Value |
|---|---|
| Analog VCON control | Enables continuous, glitch-free output voltage adjustment for envelope tracking without MCU intervention |
| Fixed 2.25 MHz PWM | Eliminates audible noise and avoids interference with cellular receive bands (e.g., GSM 900/1800, LTE B1/B3) |
| Minimal external parts | Only one 1.0 µH shielded inductor and two 10 µF X5R ceramic capacitors required - saves PCB area in compact handset designs |
| Fast transient response | 30 µs settling time supports TDMA/GSM burst-mode PA operation with minimal droop or overshoot |
| Integrated protections | Current limit and thermal shutdown prevent damage during PA mismatch or ambient temperature rise - no external sensing needed |
Applications
| Cellular Handsets | RF PC Cards |
|---|---|
Use Scenario: Dynamic power control of WCDMA/LTE power amplifiers during uplink transmission bursts. IC Role / Device Role / Timing Role: Adjustable buck converter providing real-time PA supply voltage scaling synchronized to baseband envelope signal. Use Value: Improves PA efficiency by >25% at back-off power levels while maintaining ACLR compliance. | Use Scenario: Compact, low-noise power supply for mini-PCIe RF modules used in laptop WWAN adapters. IC Role / Device Role / Timing Role: Primary PA bias regulator with minimal EMI impact on adjacent USB 2.0 or PCIe signal lines. Use Value: Enables full 1.25A output in <2.25 mm² footprint without requiring spread-spectrum or complex filtering. |
| Hand-Held Radios | Battery-Powered IoT Transceivers |
Use Scenario: Efficient PA supply in narrowband PMR radios operating from 3.7V Li-Poly batteries. IC Role / Device Role / Timing Role: Step-down regulator delivering stable 2.8V to Class AB PA under varying battery voltage (4.2V → 3.2V). Use Value: Maintains constant PA gain and output power across battery discharge cycle without manual recalibration. | Use Scenario: Low-quiescent power supply for sub-GHz LoRa or NB-IoT transceiver PAs in sensor nodes. IC Role / Device Role / Timing Role: Bias source enabling rapid PA enable/disable cycles with 0.01 µA shutdown current. Use Value: Extends battery life beyond 10 years in duty-cycled LPWAN applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3 MHz fixed-frequency, 0.6V–5.5V output, but uses resistor feedback - no analog VCON input | Requires external DAC or GPIO-controlled resistor network for dynamic voltage scaling | Choose when digital control is preferred and VCON simplicity is not required |
| MAX8640YETA+ | 2.25 MHz, 0.6V–3.3V output, 1.2A max, but lacks integrated VCON interface - uses I²C for voltage setting | Needs I²C bus resources and firmware support; slower update rate than analog VCON | Choose when system already uses I²C for power management and needs programmable sequencing |
Compared with TPS62231DRVR and MAX8640YETA+, the LM3210TLX/NOPB uniquely provides direct analog VCON control for zero-latency PA voltage modulation - eliminating DACs, I²C overhead, and associated layout complexity in RF front-end designs.
Availability
LM3210TLX/NOPB is available at Aetrix Electronics and suitable for cellular handsets, RF PC cards, hand-held radios, and battery-powered IoT transceivers requiring stable component supply with guaranteed long-term availability.
Supply support for LM3210TLX/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 LM3210TLX/NOPB belongs to TI's RF-specific power management portfolio, designed explicitly for analog-controlled, high-transient-response biasing of cellular and broadband RF power amplifiers.
FAQ
What is the function of the VCON pin on the LM3210TLX/NOPB?
The VCON pin on the LM3210TLX/NOPB is an analog input that directly controls the output voltage from 0.5V to 3.6V using a 0.5V–1.2V input signal. Unlike resistor-based or digital-set regulators, the LM3210TLX/NOPB uses this pin for continuous, real-time PA supply modulation - enabling envelope tracking without external DACs or firmware intervention. This feature is integral to the LM3210TLX/NOPB's role in RF power amplifier biasing.
Does the LM3210TLX/NOPB require external compensation components?
No, the LM3210TLX/NOPB uses internal compensation and operates stably with only three external components: one inductor and two ceramic capacitors. Its control loop is optimized for the specified 1.0 µH inductor and 10 µF output capacitance, eliminating the need for external RC networks or phase-margin tuning. This simplification is confirmed in the LM3210TLX/NOPB datasheet (SLVS729A) and reduces design risk in space-constrained RF layouts.
What package type and dimensions does the LM3210TLX/NOPB use?
The LM3210TLX/NOPB is packaged in a 6-pin WSON (Wettable Flank Small Outline No-Lead) case measuring 1.5 mm × 1.5 mm × 0.55 mm with an exposed thermal pad. The package marking "XVS/55" appears on the top surface, and pin 1 is identified by a dot. This ultra-compact footprint supports high-density RF module integration and is compatible with standard reflow profiles per JEDEC J-STD-020.
Can the LM3210TLX/NOPB be used outside RF power amplifier applications?
Yes - while optimized for RF PA biasing, the LM3210TLX/NOPB functions as a general-purpose adjustable buck converter with 2.7V–5.5V input, 0.5V–3.6V output, and 1.25A capability. It has been deployed in portable medical sensors and low-noise instrumentation where fast transient response and low shutdown current are valued. However, its VCON interface offers no benefit outside analog-controlled load scenarios, so alternative regulators may be more appropriate for fixed-output or digitally managed systems.
What is the typical shutdown current of the LM3210TLX/NOPB?
The LM3210TLX/NOPB draws 0.01 µA (typical) in shutdown mode when the SHDN pin is pulled low. This ultra-low quiescent current extends battery runtime in standby or sleep states - especially valuable in burst-mode RF systems like GSM or NB-IoT transceivers. The specification is measured per the LM3210TLX/NOPB datasheet (SLVS729A) under VIN = 3.6V and TA = 25°C.
LM3210TLX/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
LM3210TLX/NOPB FAQ
1.How can I place an order for LM3210TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3210TLX/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 LM3210TLX/NOPB reliable?
The price and inventory of LM3210TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3210TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3210TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3210TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3210TLX/NOPB?
LM3210TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3210TLX/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 LM3210TLX/NOPB?
For technical support, including LM3210TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3210TLX/NOPB requirements.
6.How does Aetrix verify that LM3210TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3210TLX/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 LM3210TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3210TLX/NOPB?
All LM3210TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3210TLX/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 LM3210TLX/NOPB part is unused and in its original packaging.
Return procedure for LM3210TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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