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參數(shù)資料
| 型號： | L6997STR |
| 廠商： | 意法半導體 |
| 英文描述： | STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS |
| 中文描述： | 降壓控制器低電壓運作 |
| 文件頁數(shù)： | 15/30頁 |
| 文件大?。?/td> | 515K |
| 代理商： | L6997STR |
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15/30
L6997S
Notes: 1. N.M.=Not Mounted
2. The demoboard with this component list is set to give: V
OUT
= 1.25V, F
SW
= 270kHz with an input voltage around V
IN
= V
CC
=
3.3V-5V and with the integrator feature.
3. The diode efficiency impact is very low; it is not a necessary component.
4. All capacitors are intended ceramic type otherwise specified.
5.4 EFFICIENCY CURVES
Source mode
V
IN
= 3.3V V
OUT
= 1.25V F
SW
= 270kHz
Figure 15. Efficiency vs output current
Part name
OUTPUT CAPACITORS
C14, C15
Value
Dimension
Notes
220
μ
F
2R5TPE220M
POSCAP
INDUCTOR
L1
2.7
μ
H
DO3316P-272HC
COILCRAFT
POWER MOS
Q1,Q2
DIODE
STS5DNF20V
STMicroelectronics
Double mosfet in sigle package
D2
STPS340U
STMicroelectronics
3
Table 9. Component list
(continued)
The component list is shared in two sections: the first for the general-purpose component, the second for
power section:
0,0
10,0
20,0
30,0
40,0
50,0
60,0
70,0
80,0
90,0
100,0
0,0
1,0
2,0
3,0
4,0
5,0
6,0
Current [A]
Eff [%]
PFM mode
PWM mode
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| L6998-0 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-1 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-5 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6998-6 | 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT |
| L6999 | 制造商:HAMAMATSU 制造商全稱:Hamamatsu Corporation 功能描述:The best light source is supported by the best electrode technology |
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