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L5987 Datasheet(PDF) 36 Page - STMicroelectronics

Part # L5987
Description  3 A step-down switching regulator
PDF  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5987 Datasheet(HTML) 36 Page - STMicroelectronics

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L5987 - L5987A
Application information
36/42
Figure 28.
Load regulation
Figure 29.
Line regulation
Figure 30.
Load transient:
from 0.4 A to 3 A
Figure 31.
Soft-start
Figure 32.
Short-circuit behavior
0
0.2
0.4
0.6
0.8
1
1.2
00.5
11.5
22.5
3
IO [A]
VCC=12V
VCC=5V
0
0.2
0.4
0.6
0.8
1
2
4
6
8
10
12
14
16
18
VCC [V]
IO=1A
IO=2A
IO=3A
VOUT
100mV/div
AC coupled
IL 1A/div
Time base 100us/div
COUT=47uF
L=3.8uH
FSW=520k
VOUT
100mV/div
AC coupled
IL 1A/div
Time base 100us/div
COUT=47uF
L=3.8uH
FSW=520k
IL 1A/div
VOUT 1V/div
Time base 1ms/div
IL 1A/div
VOUT 0.5V/div
Time base 1ms/div
IL 1A/div
VOUT 1V/div
Time base 1ms/div
IL 1A/div
VOUT 0.5V/div
Time base 1ms/div
IL 1A/div
OUT 10V/div
VOUT 1V/div
SHORTED OUTPUT
Time base 5ms/div
IL 1A/div
OUT 10V/div
VOUT 0.5V/div
SHORTED OUTPUT
Time base 5ms/div
IL 1A/div
OUT 10V/div
VOUT 1V/div
SHORTED OUTPUT
Time base 5ms/div
IL 1A/div
OUT 10V/div
VOUT 0.5V/div
SHORTED OUTPUT
Time base 5ms/div



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