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L5991AD AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

L5991AD product

L5991AD

DC DC Switching Controllers

PWM ControllerCurrent ModeStandby

The L5991AD is a primary controller IC for off-line or DC-DC power supplies, featuring current-mode PWM control and a standby function for improved light-load efficiency.

Best for

  • Offline power supplies
  • DC-DC converters
  • Flyback topologies

Avoid if

  • Applications requiring voltage-mode control only

Check before use

  • Standby threshold settings
  • PCB layout for noise immunity

Key specifications

Switching Frequency
1 MHz (max)
Output Current
1 A
Start-up Current
< 120 µA

Compliance & Environment

RoHS
ROHS3 Compliant
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Power Supply

Datasheet

L5991AD-STMicroelectronics-datasheet-17703646.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for L5991AD: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
Schematic symbol for your EDA tool
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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KiCad Library
Verified KiCad 8 symbol, footprint, and 3D model
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Where to Buy

Real-time and catalog pricing from verified distributors

Live prices updated on demand · Catalog (~) prices may differ

Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

The L5991AD is a primary controller IC designed for fixed-frequency current-mode power supply applications, featuring integrated standby functionality.