Low Power RF PLL-Synthesizer Operating From a Single Cell Battery Reference Design

(ACTIVE) TIDA-00886

Description & Features

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Key Document

Description

The TIDA-00886 consists of the LMX2571,  high-performance, wideband PLLatinum™ low-power RF synthesizer, powered by a single cell battery using TPS63050 a DC-DC buck-boost converter.  The TIDA-00886 shows that the DC-DC buck-boost converter has a small to negligible effect on the phase noise performance of the LMX2571.  The LMX2571 is very popular in 2-way radio applications as well as handheld test and measurement equipment. Although this is a low current consumption device, 39-mA in Synthesizer mode (Internal VCO) and 9mA in PLL mode (External VCO), efficiency is critical for battery operated applications.

Features
  • 3.3 Vdc output from the buck-boost to power LMX2571 from a battery
  • 2.5V to 5.5V input voltage range
  • Any frequency from 10MHz to 1344MHz
  • Efficiency >90% in boost mode and >95 % in Buck Mode

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LMX2571  LMX2571 Low Power Synthesizer with FSK Modulation  Clock and Timing  Sample & Buy View Design Kits & Evaluation Modules
LP38798  800-mA Ultra-Low-Noise, High-PSRR LDO  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
LP5900  150mA Ultralow-Noise LDO for RF and Analog Circuits Requires No Bypass Capacitor  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TPS63050  Tiny Single Inductor Buck Boost Converter  Buck/Boost, Inverting or Split-Rail  Sample & Buy View Design Kits & Evaluation Modules
TS5A21366  0.75-Ohm Dual SPST Analog Switch with 1.8-V compatible input logic  Switches and Multiplexers  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 2306 07 Oct 2016 247
Selection guides (1)
Title Abstract Type Size (KB) Date Views
PDF 5321 02 May 2017 5,042
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 248 01 Sep 2016 143
PDF 229 01 Sep 2016 49
PDF 783 01 Sep 2016 150


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