Texas Instruments LM3280TL-275/NOPB

Overview

LM3280TL-275/NOPB from Texas Instruments is an RF power-management unit combining a high-efficiency step-down DC/DC converter with three low-dropout regulators. The device is optimized for low-power handheld products that need an adjustable RF PA supply rail and additional fast-transient LDO rails from a single Li-ion battery input.

As part of the LM3280 product family, LM3280TL-275/NOPB provides 2MHz PWM buck conversion, analog VCON-controlled output adjustment, bypass operation, three LDO regulators, current overload protection, thermal overload protection, and a 16-pin DSBGA package. For engineers reviewing the LM3280TL-275/NOPB datasheet, LM3280TL-275/NOPB pinout, LM3280TL-275/NOPB application, or LM3280TL-275/NOPB equivalent, this device is widely used in cellular phones, RF power amplifiers, handheld wireless products, portable communication modules, battery-powered RF subsystems, and compact mobile power architectures.

Technical Context

In RF handheld systems, LM3280TL-275/NOPB operates as a dynamic power supply for a linear RF power amplifier. The DC/DC output can be adjusted from 0.8V to 3.6V using the VCON analog control input, improving efficiency across different RF transmit power levels.

The synchronous buck converter runs at a typical 2MHz switching frequency and supports up to 300mA in PWM mode or 500mA in bypass mode. Three fast-transient LDOs provide auxiliary supply rails for RF or baseband circuitry.

LM3280TL-275/NOPB is commonly used when a Li-ion powered RF platform needs adjustable PA supply control, multiple local LDO rails, compact DSBGA packaging, and overload/thermal protection.

Key Specifications

Pinout & Package

The LM3280TL-275/NOPB pinout includes Li-ion input supply, switch node, VCON analog control, DC/DC output, three LDO output pins, enable/control pins, and DSBGA ground connections.

For PCB design, the buck inductor and ceramic capacitors should be placed close to the switch and input pins, while RF PA supply traces and LDO outputs should be routed with low impedance and good local decoupling.

Key Features

• Adjustable DC/DC output supports RF PA efficiency optimization.
• Three LDOs provide additional fast-transient rails.
• 2MHz switching supports compact passives.
• Bypass mode supports higher load current when needed.
• Current and thermal protection improve reliability.
• DSBGA package supports dense handheld layouts.

Applications

Equivalent & Alternatives

When evaluating a LM3280TL-275/NOPB equivalent, engineers should compare VCON-controlled buck behavior, RF PA supply range, LDO count, package, bypass capability, and load-current requirements.

Compared with LM3209TLX/NOPB, LM3280TL-275/NOPB adds three LDO rails around an RF PA supply function. LM3280TL-275/NOPB vs ADP5022ACBZ-4-R7 selection depends on whether the system needs VCON-controlled RF PA supply optimization or a general multi-output PMIC.

Quality

LM3280TL-275/NOPB should be sourced as original Texas Instruments components through traceable supply channels. Quality checks may include DSBGA package inspection, top-mark validation, solderability testing, output-voltage verification, and regulator load testing.

Production validation should include startup behavior, load transients, thermal performance, protection response, output ripple, and PCB layout review for the switching and linear regulator sections.

Availability

LM3280TL-275/NOPB available at Aetrix Electronics and is suitable for cellular, RF, handheld, and portable communication systems requiring stable power-management component supply support.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics, automotive electronics, and embedded product programs. Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.

For production builds, confirming package, output-voltage option, rail-current budget, lifecycle status, lead time, and sourcing continuity helps reduce procurement risk.

Manufacturer

Texas Instruments is a global semiconductor manufacturer specializing in analog ICs, embedded processors, power-management devices, interface products, sensing solutions, and industrial semiconductor technologies.

The LM3280 product family is a Texas Instruments RF power-management series combining an adjustable buck converter and multiple LDOs for handheld RF PA and mobile communication power systems.

FAQ

What is LM3280TL-275/NOPB used for?

LM3280TL-275/NOPB is used for RF power amplifiers, cellular phones, wireless handheld products, portable communication modules, and battery-powered RF subsystems.

Where can I find the LM3280TL-275/NOPB datasheet download?

The LM3280TL-275/NOPB datasheet is available from Texas Instruments and includes electrical ratings, pin functions, package data, and RF power-management application details.

What should be considered in LM3280TL-275/NOPB pinout design?

Designers should keep the buck switching loop compact, route VCON carefully, and decouple the RF PA and LDO rails close to their loads.

Does LM3280TL-275/NOPB include LDO regulators?

Yes. It includes three fast-transient LDO regulators in addition to the step-down DC/DC converter.

What are common LM3280TL-275/NOPB equivalent solutions?

Common candidates include LM3209TLX/NOPB and ADP5022ACBZ-4-R7 depending on RF PA control, LDO count, package, and rail requirements.