L4971 DC-DC Switching Converters by STMicroelectronics

1.5A Switching Regulator

Status: Active
Series: L4971
RoHS: Compliant
View Datasheet Manufacturer Site View Pricing & Stock

The L4971 is a step down monolithic power switching regulator delivering 1.5A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25Ω) to obtain very high efficency and high switching speed. A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed). A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications. Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown. The device is available in plastic dual in line, DIP8 for standard assembly, and SO16W for SMD assembly.

Prices starting from US$1.40


Distributor Starting From Stock
Logo for Future Electronics Future Electronics US$1.71
1,600
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Logo for Transfer Multisort Elektronik Transfer Multisort Elektronik US$2.39
207
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Logo for EBV Elektronik EBV Elektronik -
600
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Logo for Newark Electronics Newark Electronics US$1.92
-
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Logo for Avnet America Avnet America US$1.83
-
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Logo for Farnell Farnell US$1.40
-
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Features

PROTECTION AGAINST FEEDBACK DISCONNECTION
INHIBIT FOR ZERO CURRENT CONSUMPTION
SOFT START FUNCTION
THERMAL SHUTDOWN
ZERO LOAD CURRENT OPERATION
VOLTAGE FEEDFORWARD
UP TO 1.5A STEP DOWN CONVERTER
PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE
OPERATING INPUT VOLTAGE FROM 8V TO 55V
SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz
INTERNAL CURRENT LIMITING (PULSE-BY PULSE AND HICCUP MODE)
OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V

Alternative Descriptions

L4971 Series 55 V 1.5 A Step Down Switching Regulator Through Hole - DIP-8 | Future Electronics
Conv DC-DC Single Step Down 8V to 55V | RS
IC: driver | Transfer Multisort Elektronik
Conv DC-DC Single Step Down 8V to 55V 8-Pin PDIP Tube | EBV Elektronik
Buck Regulators Rohs Compliant: No |Stmicroelectronics L4971 | Newark Electronics
DC/DC CONV, BUCK, 100KHZ, DIP-8 | Farnell


Frequently Asked Questions

Where can I find additional details, specifications and documents for a L4971?

Additional datasheets, footprints and schematics for L4971 are listed on our Part Details page. You can also find images and similar parts to L4971 on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for L4971 on our Product Comparison page. Access via the 'View Pricing & Stock' button to view L4971 price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does L4971 fall under?

The L4971 is listed under Power Management > DC-DC Switching Converters > Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to L4971 when available in the Buck Regulators range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the L4971 you can contact the distributor directly for product support, shipping queries etc.

Is the L4971 RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.

Which authorised distributors for L4971 have stock available?

Authorised distributors including Future Electronics, RS, Transfer Multisort Elektronik, EBV Elektronik and Newark Electronics have stock available or on a lead time for L4971.

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for L4971 often in real-time on the comparison pages.

What if I can't find stock of L4971?

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