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R5973D Datasheet(PDF) 33 Page - STMicroelectronics

Part # R5973D
Description  Up to 2 A step-down switching regulator for aerospace applications
PDF  39 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

R5973D Datasheet(HTML) 33 Page - STMicroelectronics

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R5973D
Application information
39
8.9
External SOFT_START network
At start-up the device can quickly increase the current up to the current limit in order to
charge the output capacitor. If soft ramp-up of the output voltage is required, an external
soft-start network can be implemented as shown in Figure 22. The capacitor C is charged
up to an external reference through R and the BJT clamps the COMP pin.
This clamps the duty cycle, limiting the slew rate of the output voltage.
Figure 22. Soft-start network example



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