PARALLEL-LDO-CALC

Parallel low-dropout (LDO) calculator

PARALLEL-LDO-CALC

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Overview

The parallel low-dropout (LDO) calculator is a Microsoft® Excel®-based tool that provides worst-case analysis for parallel LDO regulators using ballast resistors. The tool helps the user identify the minimum number of parallel LDO regulators required and optimum ballast resistance for a system requirement set.

Data-sheet information for common LDO regulators used in parallel applications is prepopulated into the calculator. The user can evaluate which LDO regulator device best meets their system needs based on their system requirements.

Features
  • Determine minimum parallel LDO regulators required to meet set of parallel LDO system requirements
  • Automatically calculate optimum ballast resistor from parallel LDO system requirements
  • Integrated calculations automatically perform worst-case analysis to determine optimum ballast resistance and minimum number of parallel LDO regulators required
  • Supports multiple LDO regulator devices for user assessment
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Calculation tool

PARALLEL-LDO-CALC Parallel low-dropout (LDO) calculator

Supported products & hardware

Supported products & hardware

Products
Linear & low-dropout (LDO) regulators
TPS7A33 1-A, high-PSRR, negative, adjustable low-dropout voltage regulator with enable TPS7A47 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A47-Q1 Automotive 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A4701-EP Enhanced product, 36-V, 1-A, 4-μVRMS, RF LDO voltage regular TPS7A52 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A52-Q1 Automotive 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A53 3-A, low-VIN (1.1 V) low-noise high-accuracy ultra-low-dropout (LDO) voltage regulator TPS7A53-Q1 Automotive, 3-A, low-VIN (1.1 V) low-noise high-accuracy ultra-low-dropout (LDO) voltage regulator TPS7A53A-Q1 Automotive, 3-A, low-VIN 5.6-µVRMS low-noise high-accuracy ultra-low dropout voltage regulator TPS7A53B 3-A, 1.1-V, low-VIN, low-noise high-accuracy ultra-low-dropout voltage regulator with 0.5-V low VREF TPS7A54 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A54-Q1 Automotive 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout (LDO) voltage regulator TPS7A57 5-A, low-input-voltage, low-noise, high-accuracy low-dropout (LDO) voltage regulator TPS7A83A 2-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A84A 3-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A85A 4-A, low-VIN (1.1-V), low-noise, high-accuracy, ultra-low-dropout voltage regulator with power good TPS7A94 1-A, ultra-low noise, ultra-high PSRR, RF voltage regulator TPS7B7702-Q1 Automotive 300-mA, off-battery (40-V), dual-channel adjustable antenna low-dropout voltage regulator TPS7A8300 2-A, low-VIN, low-2-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good wi TPS7A84 3-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy TPS7A85 4-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good with high-accuracy TPS7A96 2-A, ultra-low noise ultra-high PSRR RF voltage regulator TPS7A4501-SP Radiation-hardened, QMLV, 1.5-V to 20-V input 1.5-A low-dropout (LDO) regulator TPS7H1111-SP Radiation-hardened, QMLV and QMLP, 1.5A ultra-low-noise high-PSRR low-dropout (LDO) regulator TPS7H1111-SEP Radiation-tolerant, 1.5A, ultra-low-noise ultra-high-PSRR RF LDO regulator
Hardware development
Evaluation board
TPS7A57EVM-081 TPS7A57 evaluation module for 5-A low-noise high-accuracy low-dropout (LDO) voltage regulator

Supported products & hardware

Linear & low-dropout (LDO) regulators
TPS7A47 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A47-Q1 Automotive 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable TPS7A4701-EP Enhanced product, 36-V, 1-A, 4-μVRMS, RF LDO voltage regular TPS7A57 5-A, low-input-voltage, low-noise, high-accuracy low-dropout (LDO) voltage regulator TPS7A94 1-A, ultra-low noise, ultra-high PSRR, RF voltage regulator

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-050061 Scalable, high-current, low-noise parallel low-dropout (LDO) reference design

Support & training

TI E2E™ forums with technical support from TI engineers

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