ldo

Automate LDO design, sizing, and verification for PTM 180nm PMOS-pass regulators.

13|1|Updated Mar 10, 2026

Search Tags:#ngspice #ldo #analog-design #ptm180 #loop-gain #psrr

Ready to run

npx skills add https://github.com/Arcadia-1/analog-circuit-skills --skill ldo

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: ldo
Source: https://github.com/Arcadia-1/analog-circuit-skills/tree/main/LDO
Command: npx skills add https://github.com/Arcadia-1/analog-circuit-skills --skill ldo

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires numpy, matplotlib, and includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This skill automates end-to-end LDO design, sizing, and verification for PTM 180nm PMOS-pass regulators, consolidating DC/AC/noise/transient analyses and sizing workflows.

Core Features & Use Cases

DC/AC/Noise/Transient simulations to validate regulator performance.
Automated transistor sizing and biasing to meet target Vout and load conditions.
Visualization and analysis of loop gain, PSRR, Zout, and stability margins.
Trade-off exploration and design iteration for GBW, PM, and regulation accuracy.

Quick Start

Run the master LDO script in the LDO/scripts directory to execute all analyses.

Frequently Asked Questions about ldo

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I automate LDO design and verification for a PTM180 NMOS process?▼

You can automate LDO design by running the master script in the scripts directory, which handles DC, AC, noise, and transient analyses for PTM 180nm PMOS-pass regulators. It iteratively sizes transistors to meet your target specifications.

What ngspice simulations are needed to verify LDO loop gain and PSRR?▼

Verifying LDO loop gain and PSRR requires running AC simulations in ngspice. This skill automates these analyses and plots loop gain, PSRR, and Zout to visualize stability margins and regulation accuracy.

Do I need specific Python packages to run PTM180 LDO sizing and analysis?▼

Yes, you need Python 3 with numpy, matplotlib, and scipy installed. You also need ngspice on your system PATH and the PTM180 BSIM3v3 models to execute the LDO sizing and verification workflows.

Can I explore trade-offs between GBW, phase margin, and regulation accuracy in LDO design?▼

Yes, the skill supports trade-off exploration and design iteration for GBW, phase margin, and regulation accuracy. It automates biasing and sizing adjustments to help you balance these performance metrics.

Why is my automated LDO transient simulation not working in ngspice?▼

LDO transient simulations fail if ngspice is not on your PATH or PTM180 BSIM3v3 models are missing. Ensure Python dependencies like numpy and scipy are installed, and the SKILL.md frontmatter contains the required name and description.