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Texas Instruments LM3202TL/NOPB
- Part No.:
- LM3202TL/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-WFBGA
- Datasheet:
-
LM3202TL/NOPB.pdf
- Description:
- IC REG BUCK ADJ 650MA 8TUSMD
- Quantity:
- Payment:
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Product details
Overview
LM3202TL/NOPB from Texas Instruments (formerly National Semiconductor) is a 650mA, 2 MHz synchronous step-down DC-DC converter optimized for dynamically powering RF power amplifiers from a single Li-Ion cell (2.7V–5.5V). It delivers adjustable output voltage (1.3V–3.16V) via analog VCON control, achieves 96% efficiency at 400mA/3.16V, and features fast 20 µs output transient response-enabling real-time PA supply modulation in cellular handsets.
For engineers reviewing the LM3202TL/NOPB datasheet, LM3202TL/NOPB pinout, LM3202TL/NOPB application, or LM3202TL/NOPB equivalent, key selection criteria include its micro SMD package compatibility, VCON-controlled output programming without external resistors, fixed-frequency PWM operation minimizing RF interference, and integrated thermal/current protection for battery-powered RF systems.
Technical Context
The LM3202TL/NOPB implements a current-mode buck architecture with internal P-channel high-side and N-channel synchronous rectifier switches. Its 2 MHz oscillator enables compact 3.3 µH inductor and ceramic capacitor filtering, while slope-compensated PWM ensures stability across line/load transients.
Voltage regulation is achieved by comparing the FB pin signal against an error amplifier output derived from VCON, modulating PFET on-time to maintain output within ±3% monotonic linearity over 0.556V–1.208V VCON range. Shutdown mode reduces quiescent current to 0.01 µA with EN < 0.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports direct connection to single-cell Li-Ion batteries without pre-regulation. |
| Output Voltage Range | 1.3V to 3.16V - digitally programmable via analog VCON pin; eliminates need for external feedback resistors. |
| Max Output Current | 650mA - sufficient for mid-power RF PAs in mobile handsets and handheld radios. |
| Switching Frequency | 2 MHz (typ.) - enables use of tiny 3.3 µH inductors and 0603 ceramic capacitors, reducing board area. |
| Efficiency | 96% (typ.) at 3.6VIN/3.16VOUT/400mA - achieved via internal synchronous rectification, minimizing conduction loss. |
| Output Transient Response | 20 µs (1.3V ↔ 3.16V) - enables rapid PA supply scaling during burst transmission modes. |
| Shutdown Current | 0.01 µA (typ.) - extends battery life during idle or sleep states in portable RF devices. |
Pinout & Package
LM3202TL/NOPB uses an 8-bump lead-free micro SMD package (NS Package Number TLA08GNA), measuring 1.5 mm × 1.5 mm with 0.3 mm solder ball pitch. The package requires NSMD (non-solder-mask-defined) pads and precision reflow due to exposed die edges and light sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Power input to internal PFET switch | Connects directly to Li-Ion battery anode; must be decoupled with 10 µF ceramic capacitor near pad. |
| VDD | Analog supply input | Provides bias for control circuitry; tied to PVIN in standard implementation. |
| EN | Digital enable input | Logic-high (>1.2V) enables operation; logic-low (<0.5V) enters 0.01 µA shutdown mode. |
| VCON | Analog voltage control input | Directly sets output voltage (1.3V–3.16V) via 2.5× gain; 0.556V–1.208V range yields linear adjustment. |
| FB | Feedback input | Monitors output at COUT electrode; internal error amplifier compares against VCON-derived reference. |
| 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; connects to large copper pour under device for thermal dissipation. |
| SW | Switch node | Drives external inductor; carries high di/dt switching current - requires short, wide trace to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronous rectification | Eliminates external Schottky diode; reduces conduction loss and improves efficiency at low VOUT. |
| VCON-controlled output programming | Enables dynamic PA supply scaling without resistor networks - simplifies layout and supports adaptive power control algorithms. |
| Fixed 2 MHz PWM operation | Shifts switching noise above sensitive RF bands (e.g., GSM 900/1800 MHz), minimizing interference with transceiver front-end. |
| Integrated soft-start | Prevents inrush current during startup; ensures controlled VOUT ramp-up without overshoot or system reset. |
| Thermal and current overload protection | Shuts down PFET/NFET when junction temperature exceeds ~150°C or peak switch current exceeds 1200 mA - prevents damage under fault conditions. |
Applications
| Cellular Handsets | Hand-Held Radios |
|---|---|
Use Scenario: Transmitting voice/data in varying RF link conditions (e.g., weak vs. strong base station signal). IC Role / Device Role / Timing Role: Dynamically adjusts PA supply voltage in real time using VCON to match required output power - reducing average current draw. Use Value: Extends talk time by up to 25% compared to fixed-supply PA architectures, verified at 400mA load with 3.16V→1.3V transition. | Use Scenario: Portable two-way radio operating on alkaline or NiMH batteries with nominal 3.6V–4.8V supply. IC Role / Device Role / Timing Role: Steps down variable battery voltage to stable, adjustable PA rail while maintaining >90% efficiency across discharge curve. Use Value: Enables consistent RF output power over full battery life, avoiding transmit dropouts during low-VIN conditions. |
| RF PC Cards | Battery-Powered IoT Transceivers |
Use Scenario: Mini-PCI Express modules requiring compact, low-noise DC-DC for integrated 2.4 GHz Wi-Fi/BT PAs. IC Role / Device Role / Timing Role: Provides regulated, low-ripple PA supply in space-constrained 30 mm × 30 mm form factor with minimal BOM count. Use Value: Achieves 10 mVp-p ripple at 1.3V/100mA using only three external components - meets spectral mask requirements for FCC Part 15 compliance. | Use Scenario: LPWAN nodes (e.g., LoRa, NB-IoT) transmitting short bursts with duty cycles <1%. IC Role / Device Role / Timing Role: Powers PA only during active transmit windows; remains in 0.01 µA shutdown between bursts. Use Value: Reduces average system current to <5 µA in sleep mode - enabling 10+ year battery life with CR2032 coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF PA power supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | 3 MHz switching frequency; 600mA max output; requires external feedback resistors for VOUT setting. | Lacks analog VCON interface - output voltage fixed per resistor network; unsuitable for dynamic PA scaling. | Choose when fixed-output, higher-frequency operation is prioritized over programmability. |
| MAX8640YETA+ | 1.5 MHz switching; 600mA output; integrated soft-start and power-good flag; no VCON pin. | Designed for general-purpose portable loads - lacks monotonic VCON-to-VOUT transfer function needed for PA envelope tracking. | Choose when system-level power sequencing and status signaling outweigh dynamic PA control needs. |
Compared with TPS62231DRYT and MAX8640YETA+, the LM3202TL/NOPB uniquely provides analog VCON-based output voltage control with 20 µs transient response and 2.5 V/V gain - making it the only option among the three that supports real-time PA supply modulation without firmware intervention or external DACs.
Availability
LM3202TL/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, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM3202TL/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 responsibility for legacy power management ICs including the LM3202 series.
The LM3202TL/NOPB belongs to TI's RF Power Management portfolio, designed specifically to address dynamic supply requirements of cellular and wireless PA stages - emphasizing small size, low noise, and analog programmability over generic buck functionality.
FAQ
What is the recommended inductor value for LM3202TL/NOPB?
The LM3202TL/NOPB is optimized for a 3.3 µH shielded inductor with ≥1200 mA saturation current and ≤100 mΩ DCR. Recommended part numbers include Taiyo-Yuden NR3015T3R3M and Coilcraft DO3314-332MXC. Using lower inductance risks instability during load transients and degrades VCON response time, as confirmed in the LM3202TL/NOPB datasheet Figure 3 and Application Information section.
Does LM3202TL/NOPB require external feedback resistors to set output voltage?
No, the LM3202TL/NOPB does not require external feedback resistors. Its output voltage is set entirely by the analog voltage applied to the VCON pin, which controls VOUT from 1.3V to 3.16V via a 2.5 V/V gain relationship. This eliminates resistor networks and enables dynamic adjustment - a core design feature documented in the LM3202TL/NOPB datasheet Table 1 and Figure 4.
What is the maximum allowable voltage on the VCON pin of LM3202TL/NOPB?
The LM3202TL/NOPB VCON pin accepts voltages from 0.484V to 1.312V for monotonic output control. Voltages below 0.484V clamp VOUT to 1.3V (VFB,MIN); voltages above 1.312V clamp VOUT to 3.16V (VFB,MAX). Exceeding the absolute maximum rating of (VDD + 0.2V) risks damage, as specified in the LM3202TL/NOPB Absolute Maximum Ratings table.
How does LM3202TL/NOPB achieve 96% efficiency at 400mA?
The LM3202TL/NOPB achieves 96% efficiency at 3.6VIN/3.16VOUT/400mA through internal synchronous rectification - using a low-RDS(ON) N-channel MOSFET (415 mΩ typ.) instead of a lossy Schottky diode. This design choice, combined with 2 MHz fixed-frequency PWM and optimized gate drive, minimizes conduction and switching losses, as measured in the LM3202TL/NOPB Efficiency vs. Output Current curves (Figure 20141565).
Can LM3202TL/NOPB operate with input voltage below 2.7V?
No, the LM3202TL/NOPB is not guaranteed to operate below 2.7V input. The datasheet specifies 2.7V as the minimum operating voltage; operation below this threshold results in out-of-regulation behavior. System controllers must hold EN low until VIN exceeds 2.7V - a requirement explicitly stated in the LM3202TL/NOPB Shutdown Mode section and Note 2 of the Operating Ratings table.
LM3202TL/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
LM3202TL/NOPB FAQ
1.How can I place an order for LM3202TL/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3202TL/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 LM3202TL/NOPB reliable?
The price and inventory of LM3202TL/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3202TL/NOPB is usually 5 days.
3.What payment methods are accepted for LM3202TL/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3202TL/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3202TL/NOPB?
LM3202TL/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3202TL/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 LM3202TL/NOPB?
For technical support, including LM3202TL/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3202TL/NOPB requirements.
6.How does Aetrix verify that LM3202TL/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3202TL/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 LM3202TL/NOPB meets industry standards.
7.What is the process for return or replacement of LM3202TL/NOPB?
All LM3202TL/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3202TL/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 LM3202TL/NOPB part is unused and in its original packaging.
Return procedure for LM3202TL/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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