The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2A so it is able to deliver more than 1.5 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 RthJA down to approximately 40 °C/W.
The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.
An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components.
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.
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|AN2823: Current source for LED driving based on the L5973AD||1.1||1 MB|
|AN1723: Designing with L5973AD high efficiency DC-DC converter||4.0||1 MB|
|DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration||1.1||359 KB|
|X597X Pspice model||3 MB|
|Brochure Power management guide||09.2017||3 MB|
|Part Number||Package||Packing Type||Marketing Status||Unit Price (US$) *||Quantity||ECCN (EU)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|L5973AD||PowerSO-8||Tube||Active : Product is in volume production||0.991||1000||NEC||EAR99||-||MORE INFO||DISTRIBUTOR AVAILABILITY|
|L5973ADTR||PowerSO-8||Tape And Reel||Active : Product is in volume production||0.991||1000||NEC||EAR99||-||MORE INFO||DISTRIBUTOR AVAILABILITY|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||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.