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L5971D The STMicroelectronics L5971D is a 1.5A step-down switching regulator. It offers an adjustable output voltage and operates within a wide input voltage range.
Mfr Part #:

L5971D

Available from 1 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics L5971D is a 1.5A step-down switching regulator. It offers an adjustable output voltage and operates within a wide input voltage range.
✓ Total Stock: 1,029 pcs
$ Price Range: $0.16

L5971D Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Husky International Electronic ✓
Non-Authorised Inventory information
1,029 pcs
On Request
1029 pcs On Request 1 On Request On Request N/A On Request On Request
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L5971D Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Frequency
Function
Input Voltage
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Type
Output Voltage
Supplier Device Package
Synchronous Rectifier
Topology
Voltage
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L5971D Description

Short technical summary and product information.

The STMicroelectronics L5971D is a monolithic power switching regulator designed for step-down (buck) conversion. It delivers up to 1.5A of output current and features an adjustable output voltage range from 1.26V to 20V, with an internal reference voltage of 1.26V (±1%). The device operates with an input voltage range of 6.5V to 28V.

 

Key electrical features include a switching frequency adjustable up to 300kHz, voltage feedforward regulation, and internal current limiting with pulse-by-pulse and hiccup modes for protection. It also incorporates zero load current operation, inhibit for zero current consumption, protection against feedback disconnection, and a soft-start function. The internal power D-MOS transistor has a typical Rdson of 0.25 Ω, contributing to high efficiency.

 

This regulator is available in a 16-SOIC package for surface mount assembly. Its typical applications include high-efficiency step-down converters for portable computers, battery chargers, distributed power systems, PDAs, and mobile communicators.

L5971D Quick Information

Product Type: DC DC Switching Regulator
Canonical Name: L5971D Step Down Switching Regulator
Subcategory: DC to DC Switching Regulator

L5971D Compliance

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

L5971D Estimated Pricing

Qty Low High
1+ $0.16 $0.16

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

L5971D Features

  • 1.5A output current capability.
  • Adjustable output voltage from 1.26V to 20V.
  • Wide input voltage range of 6.5V to 28V.
  • Switching frequency adjustable up to 300kHz.
  • Internal current limiting and thermal shutdown.

L5971D Applications

  • High efficiency step-down converters.
  • Portable computer power supplies.
  • Battery charger circuits.
  • Distributed power systems.
  • PDA and mobile communicator power.

L5971D FAQs

7 frequently asked questions generated from this part’s specifications.
What is the output voltage range of the L5971D?

The output voltage is adjustable from 1.26V to 20V.

What is the input voltage range for the L5971D?

The operating input voltage range is 6.5V to 28V.

What is the maximum output current of the L5971D?

The L5971D can deliver up to 1.5A.

What package is the L5971D available in?

The L5971D is available in a 16-SOIC (0.295", 7.50mm width) surface-mount package.

What is the operating temperature range of the L5971D?

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

Does the L5971D include thermal shutdown?

Yes, the L5971D includes thermal shutdown protection.

What type of current limiting does the L5971D have?

The L5971D features pulse-by-pulse and hiccup mode current limiting.

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