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Texas Instruments LM3209TLX-G3/NOPB
- Part No.:
- LM3209TLX-G3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 12-WFBGA, DSBGA
- Datasheet:
-
LM3209TLX-G3/NOPB.pdf
- Description:
- IC REG BCK BST ADJ 650MA 12DSBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3209TLX-G3/NOPB from Texas Instruments is a seamless-transition buck-boost DC/DC converter optimized for dynamically supplying battery-powered 3G/4G RF power amplifiers. It operates from a single Li-ion cell (2.7V–5.5V), delivers 0.6V–4.2V output programmable via analog VCON pin, supports 1A load at 3.6V out with ≥3.2V input, and achieves 95% typical efficiency at 300 mA.
For engineers reviewing the LM3209TLX-G3/NOPB datasheet, LM3209TLX-G3/NOPB pinout, LM3209TLX-G3/NOPB application, or LM3209TLX-G3/NOPB equivalent, key selection considerations include its 2.4 MHz switching frequency, internal RDSON management for high efficiency across buck/boost modes, fast 0.8V→4.0V output transition in <20 µs, and integrated over-voltage clamp on VCON.
Technical Context
The LM3209TLX-G3/NOPB uses a five-switch synchronous buck-boost topology enabling true seamless mode transition-only two switches operate per cycle in pure buck or boost, while all four engage near the VIN/VOUT boundary to eliminate output perturbation. Its internal compensation is tuned for stable loop response across both operating modes without external components.
Dynamic output control is implemented via a 3× gain analog VCON interface (VOUT = 3 × VCON), with built-in 1.6V VCON over-voltage clamp limiting max output to ~4.8V. Cycle-by-cycle current limiting (1700 mA large PFET / 850 mA small PFET) and reverse-current protection (−1.2A) safeguard operation during rapid VOUT transients and load dumps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports full discharge range of single Li-ion cell without dropout or shutdown. |
| Output Voltage Range | 0.6V to 4.2V - programmable via analog VCON pin; enables adaptive PA biasing for battery life extension. |
| Max Output Current | 1000 mA at VOUT=3.6V, VIN≥3.2V - sufficient for peak RF PA loads in cellular handsets. |
| Switching Frequency | 2.4 MHz (typ.) - enables use of compact 2.2 µH inductor and low-profile ceramic capacitors. |
| Efficiency | 95% (typ.) at VIN=3.7V, VOUT=3.5V, IOUT=300mA - minimizes thermal stress and extends runtime in space-constrained devices. |
| VCON Gain | 3 V/V - linear mapping simplifies DAC-based closed-loop PA supply control without feedback resistors. |
| Output Transition Time | <20 µs (0.8V→4.0V) - meets GSM/UMTS/WCDMA transmit envelope timing requirements. |
Pinout & Package
The LM3209TLX-G3/NOPB is housed in a 12-bump, lead-free DSBGA package measuring 2.0 mm × 2.5 mm × 0.6 mm, optimized for ultra-compact mobile PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2 | NC | Internally grounded (A1) or connected to PVIN via 36Ω resistor (A2); must be left floating per layout guidelines. |
| B1 | VCON | Analog voltage input controlling VOUT (0.2V–1.4V → 0.6V–4.2V); clamped at 1.6V to prevent overvoltage. |
| C1 | FB | Inverting input of error amplifier; connects directly to VOUT at load point for accurate regulation. |
| D1 | VOUT | Regulated output node; requires 4.7 µF ceramic capacitor to PGND for ripple suppression. |
| B2 | EN | Digital enable input; >1.2V activates device, <0.6V forces shutdown (0.02 µA ISHDN). |
| C2 | SGND | Signal ground reference for analog circuitry; separate from PGND to minimize noise coupling. |
| D2 | SW2 | Switch node for M3/M4 power FETs; connects to one end of external inductor. |
| A3, B3 | PVIN | Power input for MOSFET drivers; dual pins reduce IR drop and improve EMI performance. |
| C3 | SW1 | Switch node for M1/M2 power FETs; connects to opposite end of external inductor. |
| D3 | PGND | Power ground for MOSFETs and gate drivers; must be low-inductance connection to minimize switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless Buck-Boost Transition | Automatic 2-switch → 4-switch mode switching eliminates output glitch at VIN/VOUT crossover, critical for RF PA linearity. |
| RDSON Management | Dynamic selection of small/large PMOS M1 and auxiliary boost FETs maintains low conduction loss across 0.6V–4.2V VOUT range. |
| VCON-Controlled Output | Eliminates external feedback resistors; enables real-time PA supply adjustment using standard DAC outputs. |
| Fast Output Transient Response | 0.8V→4.0V in <20 µs with 11.4Ω load - satisfies 3G/4G transmit power ramp timing specs without overshoot. |
| Integrated Protection | Cycle-by-cycle current limit (1700/850 mA), reverse-current limit (−1.2A), output overvoltage clamp, and thermal shutdown (150°C). |
Applications
| Cellular Handset RF PA Supply | Portable Hard Disk Drive Motor Driver |
|---|---|
Use Scenario: Adaptive supply for 3G/4G power amplifier in smartphone during varying signal conditions (e.g., far/near base station). IC Role / Device Role / Timing Role: Dynamically adjusts VOUT from 0.6V to 4.2V via DAC-driven VCON to match PA power demand, reducing average current draw. Use Value: Extends battery life by up to 25% versus fixed-supply solutions, while maintaining PA linearity across full battery discharge range. | Use Scenario: Regulated motor drive voltage for 2.5-inch HDD spindle motor in ultraportable laptop. IC Role / Device Role / Timing Role: Provides stable, low-noise 3.3V–4.2V supply from declining Li-ion cell; handles rapid load transients during spin-up/spin-down. Use Value: Enables consistent motor speed control and reduced acoustic noise due to <50 mV output ripple in buck-boost mode. |
| PDA Baseband Processor Core Supply | Wireless Data Modem Power Management |
Use Scenario: Core voltage rail for ARM-based application processor in PDA requiring dynamic voltage scaling (DVS). IC Role / Device Role / Timing Role: Generates 0.8V–1.3V core supply from single-cell battery; responds to DVFS commands via VCON within 20 µs. Use Value: Achieves optimal power-performance tradeoff with 90%+ efficiency across entire VDD range, minimizing SoC thermal density. | Use Scenario: Programmable PA supply in LTE Cat-1 modem module operating across wide temperature range (−30°C to +85°C). IC Role / Device Role / Timing Role: Maintains precise VOUT accuracy (±70 mV) and 2.4 MHz switching under thermal stress, supporting carrier aggregation. Use Value: Ensures consistent EVM and ACLR performance despite battery voltage sag and ambient temperature variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Fixed 3.3V/5V output or resistor-programmable; no analog VCON interface; 96% peak efficiency. | Lacks dynamic VOUT control - unsuitable for RF PA envelope tracking but simpler for fixed-rail systems. | Select when output voltage stability outweighs adaptive biasing needs and board space allows larger 2.5mm × 2.5mm QFN. |
| MAX8646ETE+ | 3.2 MHz switching; supports 0.6V–5.5V output; requires external feedback resistors; 93% efficiency at 300 mA. | Higher max VOUT and frequency, but slower transient response (>50 µs) and no integrated VCON clamp. | Choose for wider output range where VCON simplicity is secondary and thermal design accommodates higher θJA (100°C/W). |
Compared with TPS63020DSJR and MAX8646ETE+, the LM3209TLX-G3/NOPB uniquely combines analog VCON control, sub-20 µs output transitions, and seamless mode switching - making it the only option qualified for envelope-tracking RF PA supply in space-constrained cellular handsets.
Availability
LM3209TLX-G3/NOPB is available at Aetrix Electronics and suitable for cellular handset RF power amplifier supplies, portable hard disk drive motor drivers, and PDA baseband processor core rails requiring stable component supply across extended product lifecycles.
Supply support for LM3209TLX-G3/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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LM3209TLX-G3/NOPB belongs to TI's RF power management IC portfolio, designed specifically to replace discrete LDO/buck/boost combinations in battery-powered wireless transceivers requiring adaptive, low-noise, high-efficiency supply rails.
FAQ
What is the maximum output current capability of the LM3209TLX-G3/NOPB at 4.2V output?
The LM3209TLX-G3/NOPB delivers up to 500 mA at 4.2V output when input voltage is ≥3.2V, and 650 mA at 4.2V when VIN exceeds 3.0V. This is specified in the Electrical Characteristics table under IOUT_MAX and confirmed in the APPLICATION INFORMATION section, Table 1. The device maintains regulation and thermal safety within these limits under continuous operation at TA = 85°C.
How does the VCON pin control output voltage in the LM3209TLX-G3/NOPB?
The LM3209TLX-G3/NOPB implements a fixed 3× gain between VCON and VOUT: VOUT = 3 × VCON. When VCON is set between 0.2V and 1.4V, VOUT ranges linearly from 0.6V to 4.2V. An internal clamp limits VCON to ~1.6V, capping VOUT at ~4.8V. This direct analog control eliminates external feedback resistors and enables real-time PA supply modulation.
Does the LM3209TLX-G3/NOPB require external compensation components?
No, the LM3209TLX-G3/NOPB features fully internal compensation optimized for both buck and boost operating modes. As stated in the DESCRIPTION and OPERATION DESCRIPTION sections, the device provides stable transient response across the full 0.6V–4.2V output range without any external compensation network - reducing BOM count and layout complexity.
What protection features are integrated into the LM3209TLX-G3/NOPB?
The LM3209TLX-G3/NOPB integrates cycle-by-cycle over-current limit (1700 mA / 850 mA), reverse-current limit (−1.2A), output over-voltage clamp, thermal shutdown (150°C trip, 120°C recovery), and VCON over-voltage clamping. These functions are detailed in FEATURES, OPERATION DESCRIPTION, and ABSOLUTE MAXIMUM RATINGS - ensuring robust operation under fault conditions without external circuitry.
Can the LM3209TLX-G3/NOPB operate with input voltages below 2.7V?
No, the LM3209TLX-G3/NOPB has a minimum operating input voltage of 2.7V as defined in OPERATING RATINGS. Below this threshold, the device may not regulate correctly or could enter undervoltage lockout. EN must be held low (<0.6V) during power-up until VIN reaches 2.7V to ensure reliable startup - a requirement explicitly noted in the SHUTDOWN MODE section.
LM3209TLX-G3/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 4.2V
- Current - Output:
- 650mA
- Frequency - Switching:
- 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DSBGA (2x2.5)
LM3209TLX-G3/NOPB FAQ
1.How can I place an order for LM3209TLX-G3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3209TLX-G3/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 LM3209TLX-G3/NOPB reliable?
The price and inventory of LM3209TLX-G3/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3209TLX-G3/NOPB is usually 5 days.
3.What payment methods are accepted for LM3209TLX-G3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3209TLX-G3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3209TLX-G3/NOPB?
LM3209TLX-G3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3209TLX-G3/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 LM3209TLX-G3/NOPB?
For technical support, including LM3209TLX-G3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3209TLX-G3/NOPB requirements.
6.How does Aetrix verify that LM3209TLX-G3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3209TLX-G3/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 LM3209TLX-G3/NOPB meets industry standards.
7.What is the process for return or replacement of LM3209TLX-G3/NOPB?
All LM3209TLX-G3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3209TLX-G3/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 LM3209TLX-G3/NOPB part is unused and in its original packaging.
Return procedure for LM3209TLX-G3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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