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L4949EP Datasheet(PDF) 12 Page - STMicroelectronics

Part # L4949EP
Description  Multifunction very low drop voltage regulator
PDF  19 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4949EP Datasheet(HTML) 12 Page - STMicroelectronics

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Application information
L4949E
12/19
Doc ID 4275 Rev 6
Figure 5.
Output voltage vs input voltage
Figure 6.
Quiescent current vs supply voltage
3.4
Preregulator
To improve the transient immunity a preregulator stabilizes the internal supply voltage to 5 V.
This internal voltage is present at Pin 3 (VZ). This voltage should not be used as an output
because the output capability is very small (
≤ 10 µA).
This output may be used as an option when a better transient behaviour for supply voltages
less than 8 V is required (see also application note).
In this case a capacitor (100 nF - 1 µF) must be connected between pin VZ and GND. If this
feature is not used pin VZ must be left open.
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- Obsolete
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