DistyParts Icon
L5991AD The STMicroelectronics L5991AD is a DC-DC switching controller designed for flyback topology. It operates with an input voltage range of 7.6V to 20V and a frequency up to 1MHz.
Mfr Part #:

L5991AD

Available from 2 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics L5991AD is a DC-DC switching controller designed for flyback topology. It operates with an input voltage range of 7.6V to 20V and a frequency up to 1MHz.
✓ Total Stock: 52,717 pcs
$ Price Range: $0.75

L5991AD Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Romaks Technologies ✓
Non-Authorised Inventory information
51,657 pcs
On Request
51657 pcs On Request 1 On Request On Request On Request On Request On Request
Fe Components ✓
Non-Authorised Inventory information
1,060 pcs
On Request
1060 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

L5991AD Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Clock Sync
Control Features
Duty Cycle (Max)
Frequency
Function
Lead Spacing
Lead Style
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Phases
Output Type
Supplier Device Package
Supplier Package
Synchronous Rectifier
Topology
Voltage
View Similar Products (0)

L5991AD Description

Short technical summary and product information.

The STMicroelectronics L5991AD is a versatile DC-DC switching controller suitable for flyback applications. This device supports both step-up and step-down voltage conversion, offering flexibility in power supply designs.

 

Key electrical specifications include an operating voltage range from 7.6V to 20V and a maximum operating frequency of 1MHz. It features a high duty cycle capability of up to 93% and provides a transistor driver output. The controller integrates essential control features such as current limit, frequency control, and soft start, simplifying design and improving performance.

 

Packaged in a 16-SOIC surface mount configuration, the L5991AD is designed for ease of integration into printed circuit boards. Its operating temperature range is -40°C to 150°C (TJ), ensuring reliable operation in various environmental conditions. The synchronous rectifier feature contributes to improved efficiency.

 

This component is classified under DC-DC Switching Controllers within the Power Management PMIC category, making it suitable for a wide array of power conversion needs in electronic systems.

L5991AD Quick Information

Product Type: DC-DC Switching Controller
Canonical Name: L5991AD DC-DC Switching Controller
Subcategory: Power Management PMIC

L5991AD Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

L5991AD Estimated Pricing

Qty Low High
1+ $0.75 $0.75

Estimated market price range - modelled values for guidance only, not live distributor offers.

L5991AD Features

  • Operates from 7.6V to 20V input voltage.
  • Supports frequencies up to 1MHz.
  • Features a maximum duty cycle of 93%.
  • Surface mount 16-SOIC package.
  • Wide operating temperature range.

L5991AD Applications

  • Ideal for flyback converter designs.
  • Suitable for step-up/step-down applications.
  • Used in power management circuits.
  • Enables isolation-capable outputs.

L5991AD FAQs

7 frequently asked questions generated from this part’s specifications.
What is the input voltage range of the L5991AD?

The input voltage range is 7.6V to 20V.

What is the maximum switching frequency?

The maximum switching frequency is up to 1MHz.

What is the operating temperature range?

The operating junction temperature range is -40°C to 150°C.

What package does the L5991AD come in?

It comes in a 16-SOIC (0.154", 3.90mm Width) surface-mount package.

What topology does the L5991AD use?

It uses a flyback topology.

Does the L5991AD support synchronous rectification?

Yes, it supports synchronous rectification.

What control features are included?

Control features include current limit, frequency control, and soft start.

Home

Categories