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L6997STR Datasheet(PDF) 26 Page - STMicroelectronics

No. de pieza L6997STR
Descripción Electrónicos  STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS
PDF  30 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6997STR Datasheet(HTML) 26 Page - STMicroelectronics

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L6997S
26/30
The current required by the Memory and Termina-
tion supply, depends on the memory type and
size. The figures 28 and 29 show the efficiency for
the termination section of the application shown in
fig. 27.
Figure 28. Eff. vs. Output Current Source Mode
Figure 29. Eff. vs Output Current sink mode
8
Typical Operating Characteristics
Figure 30. Load transient response from 0A to 5A..
Figure 31. Normal functionality in SINK mode..
70
75
80
85
90
95
100
02
3
4
5
6
7
Output Current (A)
1
Vout = 0.9V
Vcc = 5V
Fsw = 200KHz
Vin = 12V
Vin=1.8V
60
65
70
75
80
85
90
95
100
0
1
2
3
456
7
Output current (A)
Vin=12V
Vin = 1.8V
Vin = 12V
Vout=0.9V
Vcc=5V
Fsw=200KHz
Ch1-> Inductor current
Ch2-> Phase Node
Ch3-> Output voltage
Ch1-> Inductor current
Ch2-> Phase Node
Ch3-> Output voltage



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