参数资料
型号: L6997STR
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: SWITCHING CONTROLLER, PDSO20
封装: MO-153-AC, TSSOP-20
文件页数: 16/30页
文件大小: 546K
代理商: L6997STR
23/30
L6997S
7.3 EFFICIENCY CURVES
Figure 22. Efficiency vs output Current
Table 14. Efficiency Curves For Different Applications (VIN up to 25V)
Part name
Value
Dimension
Notes
GENERAL-PURPOSE SECTION
RESISTOR
R1
100
0603
Output resistor divider for the linear regulator.
R2
300
0603
R3
560k
0603
Input resistor divider (To set switching frequency)
R4
10k
0603
R5
47
0603
R6, R7, R11, R12
33k
0603
R8
47k
0603
Current limit resistor (To set current limit)
R9
2,7k
0603
Output resistor divider (To set output voltage)
R10
1k
0603
R13
220
0603
CAPACITOR
C1
220 nF
0805
C2
47
FKEMET-16V
C3
220nF
0805
C4
150pF
0603
First integrator capacitor
C5
47pF
0603
C6
10nF
0603
C7
330pF
0603
Second integrator capacitor
C19
220nF
0805
C20
10nF
0603
Softstart capacitor
C21
47pF
0603
C22
220nF
0805
C23
0603
N.M.
75
80
85
90
95
100
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Output Current (A)
E
ff
icie
n
cy
(
%
)
Vcc=Vin=3.3V
Fsw=200KHz
Vout=0.9V
Vout=1.2V
Vout=1.5V
Vout=1.8V
Vout=2.5V
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