PARALLEL-LDO-CALC

Parallel low-dropout (LDO) calculator

PARALLEL-LDO-CALC

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

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

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Related design resources

Reference designs

REFERENCE DESIGN

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

PARALLEL-LDO-CALC

Parallel low-dropout (LDO) calculator