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Texas Instruments LM3263TME/NOPB
- Part No.:
- LM3263TME/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Regulators
- Package:
- 16-WFBGA, DSBGA
- Datasheet:
-
LM3263TME/NOPB.pdf
- Description:
- IC REG CONV RF PWR 1OUT 16DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:634
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Product details
Overview
LM3263TME/NOPB from Texas Instruments is a high-current step-down DC-DC converter optimized for powering multi-mode, multi-band RF power amplifiers (PAs) in mobile devices. It operates from a single Li-ion cell (2.7 V to 5.5 V), delivers up to 2.5 A load current in PWM mode, supports dynamically adjustable output voltage from 0.4 V to 3.6 V, and integrates MIPI® RFFE digital control interface for real-time PA voltage scaling in 2G/3G/4G systems.
For engineers reviewing the LM3263TME/NOPB datasheet, LM3263TME/NOPB pinout, LM3263TME/NOPB application, or LM3263TME/NOPB equivalent, key selection criteria include its ACB-assisted 2.5-A capability, 2.7-MHz switching frequency, MIPI RFFE programmability, thermal/overcurrent protection, and DSBGA-16 package suitability for space-constrained smartphone front-end designs.
Technical Context
The LM3263TME/NOPB implements a synchronous buck topology with integrated PFET/NFET switches and internal compensation. Its Active Current Assist and Analog Bypass (ACB) circuit provides a parallel current path to limit peak inductor current to 1.45 A while sustaining 2.5-A total output, enabling smaller magnetics without sacrificing regulation across battery and PA load transients.
It supports three operational modes: forced PWM (for 2G spectral purity), auto-PFM/PWM (for 3G/4G efficiency optimization), and analog bypass (for minimal dropout). Voltage programming occurs via an 8-bit VSET register over the MIPI RFFE interface, with feedback referenced to FB and regulated against a 0.4–3.6 V DAC output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports full Li-ion battery discharge curve without external pre-regulation. |
| Output Voltage Range | 0.4 V to 3.6 V - digitally programmable in 15-mV LSB steps to match RF PA envelope requirements. |
| Max Load Current | 2.5 A - achievable using combined switcher + ACB path; enables direct drive of high-power LTE/WCDMA PAs. |
| Switching Frequency | 2.7 MHz (typical) - allows use of compact 1.5-µH inductors and reduces EMI filtering burden in RF-sensitive layouts. |
| Control Interface | MIPI RFFE v1.0 - 2-wire serial bus (SCLK/SDATA) with USID support; enables dynamic VOUT updates during TX bursts. |
| Protection Features | Thermal shutdown (150°C), current limiting (1.45 A steady-state PFET, 1.9 A transient), and ACB-enabled dropout mitigation. |
| Efficiency | Up to 95% at 3.4 V/550 mA - optimized for mid-to-high PA output power levels in forced PWM mode. |
Pinout & Package
The LM3263TME/NOPB is housed in a 2.049 mm × 2.049 mm, 16-pin DSBGA (YFQ) package with bottom-side ball layout optimized for low-inductance ground return and thermal dissipation in thin-profile mobile PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Power input | High-side PFET switch supply rail; connects directly to battery or system VBAT (2.7–5.5 V). |
| SVDD | Analog power | Supplies internal analog circuitry including error amplifier and DAC; requires local 10-µF decoupling. |
| PACB | ACB power | Provides dedicated supply for ACB circuitry; must be tied to PVIN with low-impedance path. |
| VIO | I/O reference & enable | 1.65–1.95 V logic reference and active-low enable; toggling below 0.45 V resets device. |
| SCLK / SDATA | RFFE interface | MIPI RFFE clock and bidirectional data lines; require pull-up to VIO and operate at ≤26 MHz. |
| FB | Feedback input | Analog feedback node connected to output filter capacitor; sets regulated VOUT via internal 0.4–3.6 V DAC. |
| SW | Switching node | Connection to internal PFET drain and NFET source; requires low-ESR ceramic output capacitor and careful routing. |
| ACB / PACB | ACB output & supply | ACB pin delivers assist current to output; PACB supplies ACB circuit-both critical for >1.45 A operation. |
| PGND / BGND / SGND | Ground terminals | PGND carries high-switching current; BGND ties ACB/digital grounds; SGND isolates analog signal ground. |
| GPO1 | General-purpose output | Configurable open-drain output; used for USID reconfiguration or status signaling per RFFE protocol. |
Key Features
| Feature | Design Value |
|---|---|
| MIPI RFFE v1.0 Interface | Enables real-time, low-latency VOUT updates synchronized to RF transmit events without host CPU intervention. |
| Active Current Assist + Analog Bypass (ACB) | Reduces required inductor size by limiting peak inductor current to 1.45 A while delivering 2.5 A total output current. |
| Auto-PFM/PWM Mode Transition | Seamlessly shifts between high-efficiency PFM (light loads) and low-ripple PWM (high-power TX) based on PA demand. |
| 2.7-MHz Fixed-Frequency PWM | Minimizes EMI interference in cellular bands and allows use of ultra-small 1.5-µH inductors and 0402 capacitors. |
| 16-Ball DSBGA Package | 2.049 mm × 2.049 mm footprint enables integration into antenna module or PA front-end subassemblies with <9.1 mm² solution area. |
Applications
| Smartphone RF Front-End | Multi-Mode Cellular Modem |
|---|---|
Use Scenario: Dynamically supplying voltage to LTE/WCDMA/EDGE power amplifiers during burst transmission. IC Role / Device Role / Timing Role: Primary PA supply regulator with MIPI RFFE-controlled VOUT scaling synchronized to baseband TX commands. Use Value: Enables envelope tracking-like efficiency without complex analog circuitry-reducing PA power loss by up to 30% vs fixed-VDD. | Use Scenario: Powering dual-band or tri-band RF transceivers requiring rapid VOUT changes between 2G, 3G, and 4G modes. IC Role / Device Role / Timing Role: Digitally programmable buck converter acting as the master PA supply under RFFE bus arbitration. Use Value: Eliminates need for multiple discrete LDOs or external DACs-reducing BOM count and PCB area by >40%. |
| Tablet Cellular Connectivity | Handheld Radio Transmitter |
Use Scenario: Delivering stable, low-noise power to high-efficiency GaAs/GaN PAs in 7–10 inch tablets with limited thermal headroom. IC Role / Device Role / Timing Role: High-current step-down regulator with integrated thermal protection and ACB-assisted transient response. Use Value: Maintains PA linearity during sustained TX bursts while limiting junction temperature rise to <125°C ambient. | Use Scenario: Supporting narrowband FM/PM transmitters in portable radios requiring fast VOUT settling during channel switching. IC Role / Device Role / Timing Role: Fast-settling DC-DC converter with <15 µs VOUT rise/fall time (1.4 V ↔ 3.4 V @ 6.8 Ω). Use Value: Reduces TX ramp-up delay by >5× vs traditional buck converters-critical for time-division duplex (TDD) protocols. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF PA supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3243TME/NOPB | Same DSBGA-16 package and RFFE interface, but rated for 3-A continuous output and includes enhanced ACB with 1.8-A assist limit. | Targeted at higher-power LTE-A and 5G NR PAs requiring >2.5 A sustained current. | Select when PA peak current exceeds 2.5 A or when future-proofing for next-gen RF bands with higher power demands. |
| TPS62864DRLR | 4-A buck converter with I²C interface (not RFFE), 1.8-V to 5.5-V input, 0.6-V to 3.3-V output, no ACB circuitry. | Used in non-RFFE systems (e.g., Wi-Fi 6E, Bluetooth LE audio) where MIPI compatibility is not required. | Choose only if redesigning away from MIPI RFFE ecosystem; lacks ACB, so requires larger inductor and exhibits higher dropout at 2.5-A loads. |
Compared with LM3263TME/NOPB, LM3243TME/NOPB extends current capability and thermal margin for advanced PAs, while TPS62864DRLR offers higher current and I²C flexibility at the cost of RFFE compliance and ACB-enhanced transient performance.
Availability
LM3263TME/NOPB is available at Aetrix Electronics and suitable for smartphone RF front-end modules, cellular modem subsystems, and handheld radio transmitter designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for LM3263TME/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 company specializing in analog, embedded processing, and power management ICs for industrial, automotive, and communications markets.
The LM3263TME/NOPB belongs to TI's RF power management product line, engineered specifically to replace discrete LDOs and external DACs in MIPI RFFE-compliant cellular front-ends with a single, highly integrated buck converter.
FAQ
What is the primary function of the LM3263TME/NOPB in a cellular RF system?
The LM3263TME/NOPB serves as a digitally programmable, high-current step-down DC-DC converter that supplies dynamically scaled voltage to RF power amplifiers in smartphones and tablets. It uses the MIPI RFFE interface to adjust output voltage from 0.4 V to 3.6 V in real time, optimizing PA efficiency across 2G, 3G, and 4G transmission modes. Its ACB feature ensures stable 2.5-A delivery without large inductors-making LM3263TME/NOPB essential for compact, thermally constrained front-end designs.
Does the LM3263TME/NOPB support both PWM and PFM operating modes?
Yes, the LM3263TME/NOPB supports forced PWM mode for 2G applications requiring low output ripple, auto-PFM/PWM mode for 3G/4G efficiency optimization, and analog bypass mode for minimal dropout. Mode selection is controlled via the SMPS_CFG register over the MIPI RFFE interface. In PWM mode, it operates at 2.7 MHz with tight ripple control; in PFM, it reduces switching frequency and quiescent current to maximize light-load efficiency-ensuring LM3263TME/NOPB adapts intelligently to varying PA power demands.
What is the role of the ACB (Active Current Assist and Analog Bypass) feature in the LM3263TME/NOPB?
The ACB feature in LM3263TME/NOPB provides a parallel current path that activates when load current exceeds ~1.45 A or during fast VOUT transients. It limits peak inductor current to maintain small magnetic size while delivering up to 2.5 A total output. ACB also enables faster output voltage settling (<15 µs for 1.4 V ↔ 3.4 V) and reduces dropout resistance to 45 mΩ in bypass mode. This makes LM3263TME/NOPB uniquely suited for multi-mode PAs where transient response, efficiency, and board space are simultaneously critical.
Which package type does the LM3263TME/NOPB use, and why is it suitable for mobile applications?
The LM3263TME/NOPB uses a 2.049 mm × 2.049 mm, 16-ball DSBGA (YFQ) package. Its ultra-compact footprint, low profile (<0.5 mm height), and bottom-terminal layout minimize parasitic inductance and improve thermal coupling to the PCB-critical for high-frequency, high-current RF power delivery in smartphones and tablets. The DSBGA construction allows dense placement near PA modules and supports automated assembly in high-volume mobile manufacturing, making LM3263TME/NOPB ideal for space- and thermal-constrained front-end designs.
How is output voltage programmed on the LM3263TME/NOPB, and what is its resolution?
Output voltage on the LM3263TME/NOPB is programmed via an 8-bit VSET_CTRL register (register 03h) communicated over the MIPI RFFE interface. This provides 256 discrete output levels from 0.4 V to 3.6 V, yielding a 15-mV LSB step size. The DAC output feeds the FB pin, enabling precise, software-controlled VOUT scaling synchronized to RF transmit events. Because the setting is digital and non-volatile per register write, LM3263TME/NOPB supports repeatable, glitch-free voltage transitions-essential for maintaining PA linearity and spectral mask compliance across modulation schemes.
LM3263TME/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Converter, RF Power Amplifier
- Voltage - Input:
- 2.7V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.4V ~ 3.6V
- Operating Temperature:
- -30°C ~ 90°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DSBGA
LM3263TME/NOPB FAQ
1.How can I place an order for LM3263TME/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3263TME/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 LM3263TME/NOPB reliable?
The price and inventory of LM3263TME/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3263TME/NOPB is usually 5 days.
3.What payment methods are accepted for LM3263TME/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3263TME/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3263TME/NOPB?
LM3263TME/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3263TME/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 LM3263TME/NOPB?
For technical support, including LM3263TME/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3263TME/NOPB requirements.
6.How does Aetrix verify that LM3263TME/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3263TME/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 LM3263TME/NOPB meets industry standards.
7.What is the process for return or replacement of LM3263TME/NOPB?
All LM3263TME/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3263TME/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 LM3263TME/NOPB part is unused and in its original packaging.
Return procedure for LM3263TME/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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