TIDA-00886

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

TIDA-00886

Design files

Overview

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
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUC19A.PDF (2306 K)

Reference design overview and verified performance test data

TIDRNG2.PDF (783 K)

Detailed schematic diagram for design layout and components

TIDRNG3.PDF (229 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDCCL6.ZIP (248 K)

Design file that contains information on physical board layer of design PCB

Products

Includes TI products in the design and potential alternatives.

RF PLLs & synthesizers

LMX25711.34-GHz, low-power, extreme-temperature RF synthesizer with frequency-shift keying (FSK) modulation

Data sheet: PDF | HTML
Analog switches & muxes

TS5A213660.75-Ω on-state resistance, 5-V, 1:1 (SPST), two-channel analog switch with 1.8-V input logic

Data sheet: PDF | HTML
Buck-boost, inverting & split-rail converters (integrated switch)

TPS63050TPS6305x Single Inductor Buck-Boost with 1-A Switches and Adjustable Soft Start

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP38798800-mA, 20-V, low-noise, high-PSRR, adjustable low-dropout voltage regulator with enable

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP5900150-mA, low-noise, low-IQ, low-dropout voltage regulator with enable

Data sheet: PDF | HTML

Technical documentation

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* Design guide Operating a Low-Power, High Performance PLL Single-Cell Battery Design Guide (Rev. A) Oct. 07, 2016

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