L5973D - Up to 2 A step down switching regulator - STMicroelectronics

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Product overview

Description

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.

All 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
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SPICE models (1)

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ZIP	X597X Pspice model		22 Sep 2016	22 Sep 2016 X597X Pspice model

Quality and Reliability

Part Number	Marketing Status	Package	Grade	RoHS Compliance Grade	Material Declaration**
L5973D	Active	PowerSO-8	Industrial	Ecopack2	PDF XML
L5973D013TR	Active	PowerSO-8	Industrial	Ecopack2	PDF XML

L5973D

Package:

PowerSO-8

Material Declaration**:

L5973D013TR

Package:

PowerSO-8

Material Declaration**:

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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ECCN (US)

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Operating temperature (°C)

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1.2831 / 1k

Available at 4 distributors

Distributor availability of L5973D

Distributor Name	Region	Stock	Min. Order	Third party link
ANGLIA Live	EUROPE	4809	1	Buy from Distributor
MOUSER	WORLDWIDE	4648	1	Buy from Distributor
FUTURE	WORLDWIDE	290	0	Buy from Distributor
DIGIKEY	WORLDWIDE	8661	1	Buy from Distributor

Distributor reported inventory date: 3/27/2025

PowerSO-8

Tube

PHILIPPINES

EAR99

NEC

-40

150

Buy from Distributor

1.2831 / 1k

Available at 7 distributors

Distributor availability of L5973D013TR

Distributor Name	Region	Stock	Min. Order	Third party link
Farnell Element14	EUROPE	74370	1	Buy from Distributor
ANGLIA Live	EUROPE	7598	1	Buy from Distributor
MOUSER	WORLDWIDE	10919	1	Buy from Distributor
FUTURE	WORLDWIDE	60000	0	Buy from Distributor
DIGIKEY	WORLDWIDE	1980	1	Buy from Distributor
Newark Element14	AMERICA	429	0	Buy from Distributor
YOSUN	ASIA/PACIFIC	100	1	Buy from Distributor

Distributor reported inventory date: 3/27/2025

PowerSO-8

Tape and Reel

PHILIPPINES

EAR99

NEC

-40

150

Buy from Distributor

L5973D Active

Budgetary Price (US$)*/Qty:

1.2831 / 1k

Available at 4 distributors

Buy Direct at ST

Add Free Sample

Package:

PowerSO-8

Packing Type:

Tube

Country of Origin:

PHILIPPINES

ECCN (US):

EAR99

ECCN (EU):

NEC

L5973D013TR Active

Budgetary Price (US$)*/Qty:

1.2831 / 1k

Available at 7 distributors

Buy Direct at ST

Add Free Sample

Package:

PowerSO-8

Packing Type:

Tape and Reel

Country of Origin:

PHILIPPINES

ECCN (US):

EAR99

ECCN (EU):

NEC

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors

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