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参数资料
| 型号： | L6920DB |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 0.9 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | LEAD FREE, MSOP-8 |
| 文件页数： | 16/16页 |
| 文件大小： | 402K |
| 代理商： | L6920DB |
L6920DB
Detailed description
9/16
Considering that current in the inductor is limited to 800mA, the maximum load current is
defined by the following relationship:
Equation 1
Where
ηis the efficiency and ILIM = 750mA
Figure 8.
No regulation C2 = Vout ; C3 = Inductor Current
5.2
Start-up
One of the key features of L6920DB is the startup at supply voltage down to 0.8V (please
see the diagram in Figure 4).
The device leaves the startup mode of operation as soon as Vout goes over 1.4V. During
startup, the synchronous switch is off and the energy is transferred to the load through its
intrinsic body diode.
The N-channel switches with a very low RDS(on) thanks to an internal charge pump used to
bias the power MOS gate. Because of this modified behavior, TON/TOFF times are
lengthened. Current limit and zero crossing detection are still available.
I
LOAD_LIM
V
in
V
out
-----------
I
LIM
T
OFF_MIN
V
out
V
in
–
2L
-------------------------
–
η
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6920DBTR | 功能描述:直流/直流开关转换器 SYNCRONOUS RECT. STEP UP CONVERTER RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| L6920DC | 功能描述:直流/直流开关调节器 Sync Rectifier Step Up Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L6920DCTR | 功能描述:直流/直流开关调节器 Sync Rectifier Step Up Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L6920DTR | 功能描述:直流/直流开关转换器 0.6 to 5.5V Step-Up RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| L6922-1 | 制造商:Thomas & Betts 功能描述:3/4 CORD GRIP CONNECTOR,EA |
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