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L6982 датащи(PDF) 16 Page - STMicroelectronics

номер детали L6982
подробное описание детали  38 V, 2 A synchronous step-down converter with low quiescent current
PDF  48 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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L6982 датащи(HTML) 16 Page - STMicroelectronics

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6.4.4
Load regulation for low consumption mode and low noise mode part number
Figure belows report the load regulation to highlight the gap, given by the different regulation strategy, at the
light-load between LNM and LCM part numbers. When the required IOUT is higher than the threshold defined in
the Low consumption mode (LCM) paragraph, the behavior of the different part numbers is the same.
Figure 16. Load regulation for LCM and LNM. VIN = 24 V; VOUT = 5 V; FSW = 400 KHz - linear scale
IOUT [A]
VIN = 24 [V]; VOUT = 5 [V]; FSW = 400 [KHz]
-1
-0.5
0
0.5
1
1.5
2
2.5
3
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
LCM
LNM
Figure 17. Load regulation for low noise mode. VIN = 24 V; VOUT = 5 V; FSW = 400 KHz - log scale
IOUT [A]
VIN = 24 [V]; VOUT = 5 [V]; FSW = 400 [KHz]
-1
-0.5
0
0.5
1
1.5
2
2.5
3
0.0001
0.001
0.01
0.1
1
LCM
LNM
6.5
Overvoltage protection
The overvoltage protection monitors the FB pin and enables the low-side MOSFET to discharge the output
capacitor if the output voltage is 20% (typ.) over the nominal value.
L6982
Overvoltage protection
DS13683 - Rev 1
page 16/48



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