L5973D DC-DC Switching Converters by STMicroelectronics

Up to 2 A step down switching regulator


The L5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.5 A so it is able to deliver more than 2 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the Rth(j-amb) down to approximately 40 °C/W. The device uses an internal P-channel D-MOS transistor (with a typical Rdson of 250 mΩ) as switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250 kHz. Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.

Where to Buy

Prices starting from US$1.04

Distributor Stock
Logo for RS
RS
from US$2.70
1,895
in stock
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Logo for Future Electronics
Future Electronics
from US$1.57
21,400
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Chip One Stop
from US$1.93
3,789
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Transfer Multisort Elektronik
from US$2.31
397
in stock
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Avnet Silica
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11,200
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EBV Elektronik
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400
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Newark Electronics
from US$1.40
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Avnet America
from US$1.58
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element14
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Distrelec
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Features

2.5 A internal switch
Operating input voltage from 4 V to 36 V
3.3 V / (±2%) reference voltage
Output voltage adjustable from 1.235 V to 35 V
Low dropout operation: 100 % duty cycle
250 kHz internally fixed frequency
Voltage feedforward
Zero load current operation
Internal current limiting
Synchronization
Adjustable soft-start time
Inhibit for zero current consumption
Protection against feedback disconnection
Thermal shutdown

Alternative Descriptions

L5973D Series 36 V 300 uA 250 kHz Switch Step Down Switching Regulator - HSOP-8 | Future Electronics
Switching Reg,2.5A,4-36Vin,HSOP8 | RS
IC: driver | Transfer Multisort Elektronik
Conv DC-DC Single Step Down 4V to 36V 8-Pin HSOP EP Tube | Avnet Silica
Power Management Rohs Compliant: Yes |Stmicroelectronics L5973D | Newark Electronics
IC, BUCK REG, SMD, 5973, HSOP8 | element14
ST Switching Voltage Regulator, Step-Down, 2.5A, 250kHz, HSOP | Distrelec


Frequently Asked Questions

Where can I find additional details, specifications and documents for a L5973D?

Additional datasheets, footprints and schematics for L5973D are listed on our Part Details page. You can also find images and similar parts to L5973D on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for L5973D on our Product Comparison page. Access via the 'View Pricing & Stock' button to view L5973D price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does L5973D fall under?

The L5973D is listed under Power Management > DC-DC Switching Converters > Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to L5973D 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 L5973D you can contact the distributor directly for product support, shipping queries etc.

Is the L5973D RoHS compliant?

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

Which authorised distributors for L5973D have stock available?

Authorised distributors including Future Electronics, Chip One Stop, RS, Transfer Multisort Elektronik and Avnet Silica have stock available or on a lead time for L5973D.

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

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