EVAL5972D: 3.3V @ 1.8A, 4.4 ~ 25 Vin


The L5972D is a step-down monolithic power switching regulator capable of delivering up to 2 A at output voltages from 1.235 V to 35 V. The operating input voltage ranges from 4.4 V to 36 V. It has been designed using BCDV technology and the power switching element is implemented through a P-channel DMOS transistor. It does not require a bootstrap capacitor, and the duty cycle can range up to 100%. An internal oscillator fixes the switching frequency at 250 kHz. This minimizes the LC output filter.


Manufacturer STMicroelectronics
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number 497-4741-ND
Eval Board Supplier STMicroelectronics
Eval Board Board not Stocked
Topology Step Down
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set 3.3 V
Current Out 1.8 A
Voltage In 4.4 ~ 36 V
Efficiency @ Conditions >80%, 5V in, 3.3V @ 0.1 ~ 1.8 A
>80%, 12V in, 3.3V @ 0.2 ~ 1.7 A
Voltage Out Range 1.235 ~ 35 V
Features Current Limit (Adj. or Fixed)
Light Load Mode
Thermal Protection
Switching Frequency 250 kHz
Standby Current [Typical] 50 µA
Quiescent Current [Typical] 3 mA
Component Count + Extras 10 + 4
Internal Switch Yes
Design Author STMicroelectronics
Application / Target Market Automotive
LCD TV / Monitor
Set-Top Boxes
Standby Current [Maximum] 50 µA
Quiescent Current [Maximum] 5 mA
Main I.C. Base Part L5972D
Date Created By Author
Date Added To Library 2011-03

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