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Texas Instruments LM3202TLX/NOPB
- Part No.:
- LM3202TLX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFBGA
- Datasheet:
-
LM3202TLX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 650MA 8TUSMD
- Quantity:
- Payment:
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Product details
Overview
LM3202TLX/NOPB from Texas Instruments (formerly National Semiconductor) is a 650mA, 2 MHz synchronous step-down DC-DC converter optimized for dynamic bias control of RF power amplifiers in single-cell Li-Ion systems. It accepts 2.7V–5.5V input, delivers adjustable 1.3V–3.16V output via analog VCON pin, achieves 96% efficiency at 400mA/3.16V, and features 20 µs output voltage transient response - enabling real-time PA efficiency tuning in cellular handsets.
For engineers reviewing the LM3202TLX/NOPB datasheet, LM3202TLX/NOPB pinout, LM3202TLX/NOPB application, or LM3202TLX/NOPB equivalent, key selection criteria include its micro SMD package compatibility, VCON-controlled output voltage range without external resistors, fixed-frequency PWM operation minimizing RF interference, and integrated thermal/current protection for battery-powered RF front-end designs.
Technical Context
The LM3202TLX/NOPB implements a current-mode buck architecture with internal P-channel high-side switch and N-channel synchronous rectifier, enabling high efficiency at low output voltages. Its 2 MHz switching frequency allows compact 3.3 µH inductors and 0603 ceramic capacitors, reducing solution footprint to three external components.
Output voltage is regulated by modulating PFET on-time using slope-compensated current-mode control; VCON pin directly sets feedback reference (1.30 V to 3.17 V) with 2.5 V/V gain, eliminating external resistor dividers. Shutdown mode reduces quiescent current to 0.01 µA while disabling all internal circuitry including reference and gate drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports direct connection to single Li-Ion cell across full discharge curve. |
| Output Voltage Range | 1.3V to 3.16V - programmable via 0.556V–1.208V analog VCON input, enabling dynamic PA supply scaling. |
| Max Load Current | 650mA - sufficient for mid-power RF PAs in GSM/EDGE/WCDMA handsets. |
| Switching Frequency | 2 MHz (typ.) - enables use of tiny 3.3 µH inductors and 0603 ceramic capacitors, minimizing PCB area. |
| Efficiency | 96% (typ.) at 3.6VIN/3.16VOUT/400mA - achieved via synchronous rectification and low RDS(ON) (140 mΩ P-FET, 300 mΩ N-FET). |
| Transient Response | 20 µs - time to slew output from 1.3V to 3.16V under load, critical for fast PA power-level transitions. |
| Shutdown Current | 0.01 µA (typ.) - preserves battery life during idle or sleep modes in portable RF devices. |
Pinout & Package
LM3202TLX/NOPB uses an 8-bump lead-free micro SMD package (NS Package Number TLA08GNA), measuring 1.5 mm × 1.5 mm with 0.5 mm pitch. The package requires NSMD (non-solder-mask-defined) pads, 10.82 mil diameter, and symmetric thermal relief traces for reliable reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Power input to internal PFET switch | Connects to Li-Ion battery rail; must be decoupled with 10 µF ceramic capacitor near A1 pad. |
| VDD | Analog supply input | Bias supply for control circuitry; tied to PVIN in standard implementation. |
| EN | Digital enable input | Logic-high (>1.2V) enables regulation; logic-low (<0.5V) forces 0.01 µA shutdown - used for system-level PA power gating. |
| VCON | Analog voltage control input | 0.556V–1.208V input sets output voltage linearly (VOUT = 2.5 × VVCON); enables closed-loop PA efficiency optimization. |
| FB | Feedback input | Internally connected to error amplifier; no external resistors required - VCON directly defines regulation point. |
| SGND | Analog and control ground | Reference for VCON, FB, EN; must be star-connected to PGND at single point to avoid noise coupling. |
| PGND | Power ground | Return path for high-current SW node and internal FETs; connects to large copper pour for thermal dissipation. |
| SW | Switch node | Drives external inductor; carries high di/dt switching current - requires short, wide trace to minimize EMI and voltage spikes. |
Key Features
| Feature | Design Value |
|---|---|
| 2 MHz fixed-frequency PWM | Enables <3.3 µH inductor and 0603 ceramic caps - reduces total solution size to <12 mm² board area. |
| VCON-controlled output | Eliminates external feedback resistors and DAC; allows real-time PA supply adjustment via baseband processor GPIO. |
| Synchronous rectification | Integrates NFET rectifier (RDS(ON) = 300 mΩ) - avoids Schottky losses, sustaining >90% efficiency down to 1.3V output. |
| Fast 20 µs transient response | Supports rapid PA power-level changes during burst transmission without output droop or overshoot. |
| Thermal & current protection | Auto-shutdown at ~150°C junction temperature and cycle-by-cycle current limit (1200 mA peak) - prevents damage during overload or short-circuit. |
Applications
| Cellular Handset PA Bias | Hand-Held Radio Transmitter |
|---|---|
Use Scenario: Dynamic power control in GSM/WCDMA/LTE handset RF front-end where PA supply voltage must scale with transmit distance and data rate. IC Role / Device Role / Timing Role: Adjustable buck regulator providing precise, fast-settling bias voltage to PA collector/drain under baseband processor command. Use Value: Extends battery life by reducing PA supply voltage during low-power transmission, enabled by 20 µs VOUT slew and VCON analog interface. |
Use Scenario: Portable two-way radio requiring efficient, compact DC-DC conversion for UHF/VHF PA stages operating from 3.6V Li-Ion packs. IC Role / Device Role / Timing Role: Primary PA supply regulator with shutdown control synchronized to PTT (push-to-talk) activation. Use Value: 0.01 µA shutdown current minimizes standby drain; 2 MHz operation avoids interference with sensitive receiver IF bands. |
| RF PC Card Power Management | Battery-Powered IoT Transceiver |
Use Scenario: Mini-PCIe or M.2 form-factor wireless cards needing regulated 1.8V–3.0V supply for integrated RF transceivers under host CPU control. IC Role / Device Role / Timing Role: Compact, low-noise step-down converter delivering dynamically scaled voltage to RF IC's PA and LNA blocks. Use Value: Micro SMD package (1.5 mm × 1.5 mm) fits tight card-edge layouts; fixed-frequency PWM simplifies EMI filtering vs. variable-frequency alternatives. |
Use Scenario: LPWAN node (e.g., LoRa, NB-IoT) with intermittent high-current TX bursts demanding efficient, low-quiescent conversion from coin-cell or small Li-Po. IC Role / Device Role / Timing Role: High-efficiency PA supply generator supporting duty-cycled transmission with fast wake-up and shutdown. Use Value: 96% peak efficiency at 400mA reduces thermal load; soft-start prevents inrush current during wake-up from deep sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF PA bias applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | 3 MHz switching frequency, 600mA max, fixed-output variants only (no VCON); requires external resistor divider for adjustable versions. | Lacks analog VCON interface - PA voltage scaling requires digital I²C/PWM control loop, increasing system complexity. | Preferred when fixed output or digital control suffices; smaller solution size but no true analog PA bias tuning. |
| MAX8640YETA+ | 2.25 MHz, 600mA, supports 0.6V–3.3V output via resistor divider; no dedicated VCON pin; higher IQ (25 µA shutdown). | Requires external feedback network and additional DAC or GPIO-controlled resistor switching for dynamic adjustment. | Valid for cost-sensitive designs where board space permits extra passives and control logic overhead. |
Compared with LM3202TLX/NOPB, TPS62231DRYT offers higher frequency but no native analog control, while MAX8640YETA+ provides wider output range yet demands external components for voltage scaling - making LM3202TLX/NOPB uniquely suited for minimal-footprint, analog-driven RF PA bias where VCON simplifies baseband integration.
Availability
LM3202TLX/NOPB is available at Aetrix Electronics and suitable for cellular handsets, handheld radios, RF PC cards, and battery-powered IoT transceivers requiring stable component supply with long lifecycle support and consistent parametric performance.
Supply support for LM3202TLX/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 precision analog and power management portfolio. TI is a global semiconductor leader focused on analog and embedded processing solutions.
The LM3202TLX/NOPB belongs to TI's RF power management product line, designed specifically for dynamic bias control of cellular and portable RF power amplifiers - prioritizing fast transient response, analog programmability, and ultra-compact packaging.
FAQ
What is the function of the VCON pin on the LM3202TLX/NOPB?
The VCON pin on the LM3202TLX/NOPB is an analog input that directly controls the output voltage between 1.3V and 3.16V without external resistors. Within 0.556V–1.208V, VOUT = 2.5 × VCON (±3% linearity); below or above this range, output clamps to minimum or maximum. This enables real-time PA efficiency optimization in LM3202TLX/NOPB-based designs.
Does the LM3202TLX/NOPB require external feedback resistors?
No, the LM3202TLX/NOPB does not require external feedback resistors. Its output voltage is set entirely by the analog voltage applied to the VCON pin, which internally generates the feedback reference. This eliminates resistor matching errors, saves board space, and simplifies design - a core differentiator of the LM3202TLX/NOPB versus standard adjustable buck converters.
What package type and dimensions does the LM3202TLX/NOPB use?
The LM3202TLX/NOPB uses an 8-bump lead-free micro SMD package (TLA08GNA) measuring 1.5 mm × 1.5 mm with 0.5 mm ball pitch. It requires NSMD pads (10.82 mil diameter), symmetric thermal relief traces, and careful reflow profiling - details specified in TI's Application Note SNVA222 for reliable assembly of the LM3202TLX/NOPB.
How does the LM3202TLX/NOPB achieve 96% efficiency at 3.16V output?
The LM3202TLX/NOPB achieves 96% efficiency at 3.16V/400mA through synchronous rectification (using internal 300 mΩ N-FET), low RDS(ON) P-FET (140 mΩ), and 2 MHz fixed-frequency PWM operation that minimizes switching losses. Combined with ceramic input/output capacitors and optimized 3.3 µH inductor, this architecture sustains high efficiency across its full output range - a verified result for the LM3202TLX/NOPB under standard test conditions.
Can the LM3202TLX/NOPB operate from a 2.5V input supply?
No, the LM3202TLX/NOPB has a minimum input voltage of 2.7V per its Absolute Maximum Ratings and Operating Ratings tables. Operation below 2.7V places the device out of regulation and may cause erratic behavior. System design must ensure PVIN remains ≥2.7V - for example, by enabling the LM3202TLX/NOPB only after battery voltage stabilizes post-power-up.
LM3202TLX/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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.3V
- Voltage - Output (Max):
- 3.16V
- 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
LM3202TLX/NOPB FAQ
1.How can I place an order for LM3202TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3202TLX/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 LM3202TLX/NOPB reliable?
The price and inventory of LM3202TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3202TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3202TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3202TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3202TLX/NOPB?
LM3202TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3202TLX/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 LM3202TLX/NOPB?
For technical support, including LM3202TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3202TLX/NOPB requirements.
6.How does Aetrix verify that LM3202TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3202TLX/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 LM3202TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3202TLX/NOPB?
All LM3202TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3202TLX/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 LM3202TLX/NOPB part is unused and in its original packaging.
Return procedure for LM3202TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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