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L6986H3V3 Datasheet(PDF) 20 Page - STMicroelectronics

No. de pieza L6986H3V3
Descripción Electrónicos  38 V, 2 A synchronous step-down switching regulator with 30 μA quiescent current
PDF  68 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6986H3V3 Datasheet(HTML) 20 Page - STMicroelectronics

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Figure 15. Normalized RDS(on),HS variation
-2%
-1%
0%
1%
2%
3%
2
4
6
8
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38
VIN [V]
RDS(on),HS @ I
OUT =1A (normalized @ VIN =12V)
4.8
Light-load operation
The MLF pinstrapping during the power-up phase determines the light-load operation (refer to Table 7. LNM/ LCM
selection (L6986H3V3) and Table 8. LNM/ LCM selection (L6986H5V)).
4.8.1
Low noise mode (LNM)
The low noise mode implements a forced PWM operation over the different loading conditions. The LNM features
a constant switching frequency to minimize the noise in the final application and a constant voltage ripple at fixed
VIN. The regulator in steady loading condition never skips pulses and it operates in continuous conduction mode
(CCM) over the different loading conditions, thus making this operation mode ideal for noise sensitive
applications.
L6986H
Light-load operation
DS12905 - Rev 2
page 20/68



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