參數資料
型號： L6997
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： 15/23頁
文件大?。?/td> 291K
代理商： L6997
15/23
L6997
POWER SECTION
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.
2.4 EFFICIENCY CURVES
Source mode
V
IN
= 3.3V V
OUT
= 1.25V F
SW
= 270kHz
Figure 12. Efficiency vs output current
INPUT CAPACITORS
C7, C13
47
μ
F
ECJ4XF0J476Z
PANASONIC
OUTPUT CAPACITORS
C14, C15
220
μ
F
2R5TPE220M
POSCAP
INDUCTOR
L1
2.7
μ
H
DO3316P-272HC
COILCRAFT
POWER MOS
Q1,Q2
STS5DNF20V
STMicroelectronics
Double mosfet in sigle package
DIODE
D2
STPS340U
STMicroelectronics
3
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
相關PDF資料
PDF描述
L6997D STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS
L6997DTR STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS
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L70S70 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
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相關代理商/技術參數
參數描述
L6997-28 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT
L6997-5 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT; Accessory Type:Tuning Element; For Use With:High Quality Variable Reactance Tuning Microwave Cavities, Filters & other Resonant Structures
L6997-9 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT
L6997D 功能描述:DC/DC 開關控制器 Adjustable Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
L6997DTR 功能描述:DC/DC 開關控制器 Adjustable Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
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