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L5985TR Datasheet(PDF) 21 Page - STMicroelectronics

No. de pieza L5985TR
Descripción Electrónicos  2 A step-down switching regulator
PDF  37 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5985TR Datasheet(HTML) 21 Page - STMicroelectronics

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L5985
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The suggested maximum system bandwidth is equals to the switching frequency divided by
3.5 (FSW/3.5), anyway lower than 100 kHz if the FSW is set higher than 500 kHz.
For example with VOUT = 3.3 V, VIN = 12 V, IO = 2 A, L = 15 μH, COUT = 22 μF, ESR < 1 mΩ,
the type III compensation network is:
In Figure 12 is shown the module and phase of the open loop gain. The bandwidth is about
75 kHz and the phase margin is 47°.
R
1
4.99k
Ω
=
R
2
1.1k
Ω
=
R
3
150
Ω
=
R
4
4.99k
Ω
=
C
3
3.3nF
=
C
4
10nF
=
C
5
100pF
=
,,
,
,
,
,



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