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A6986 Scheda tecnica(PDF) 26 Page - STMicroelectronics

Il numero della parte A6986
Spiegazioni elettronici  38 V, 2 A synchronous step-down switching regulator with 30 µA quiescent current
PDF  67 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A6986 Scheda tecnica(HTML) 26 Page - STMicroelectronics

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Functional description
A6986
26/67
DocID026211 Rev 6
external voltage source in the range 3 V < VBIAS < 5.5 V (see Chapter 5.1: Power supply
and voltage reference on page 15).
In case the VBIAS pin is connected to the regulated output voltage (VOUT), the total current
drawn from the input voltage can be calculated as Equation 14.
Figure 14. LCM operation at zero load
Given the energy stored in the inductor during a burst, the voltage ripple depends on the
capacitor value:
Equation 13
VOUT RIPPLE
Q
IL
COUT
--------------
iL t dt

0
TBURST
COUT
--------------------------------------------
==



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