- 您现在的位置：买卖IC网 > PDF目录43899 > L5980TR (STMICROELECTRONICS) 1.6 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 PDF资料下载
参数资料
| 型号： | L5980TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 3 X 3 MM, 1.08 MM HEIGHT, ROHS COMPLIANT, VFQFPN-8 |
| 文件页数： | 28/42页 |
| 文件大小： | 1188K |
| 代理商： | L5980TR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页当前第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页
Application ideas
L5980
34/42
Doc ID 13003 Rev 6
6
Application ideas
6.1
Positive buck-boost
The L5980 can implement the step up/down converter with a positive output voltage.
Figure 33 shows the schematic: one power MOSFET and one Schottky diode are added to
the standard buck topology to provide 12 V output voltage with input voltage from 2.9 V to 18
V.
Figure 33.
Positive buck-boost regulator
The relationship between input and output voltage is:
Equation 30
So the duty cycle is:
Equation 31
The output voltage isn’t limited by the maximum operating voltage of the device (18 V),
because the output voltage is sensed only through the resistor divider. The external power
MOSFET maximum drain to source voltage, must be higher than output voltage; the
higher than 16 V, the gate must be protected through zener diode and resistor)
The current flowing through the internal power MOSFET is transferred to the load only
during the OFF time, so according to the maximum DC switch current (0.7 A), the maximum
output current for the buck boost topology can be calculated from the following equation.
V
OUT
V
IN
D
1D
–
-------------
=
D
V
OUT
V
OUT
V
IN
+
------------------------------
=
相关PDF资料 |
PDF描述 |
|---|---|
| L5983 | 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| L5983TR | 1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| L5986A | 3.9 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| L5986ATR | 3.9 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| L5986TR | 3.9 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L5980TR-CUT TAPE | 制造商:ST 功能描述:L5980 Series 15 V 250 kHz 0.7 A Step Down Switching Regulator - VFQFPN-8 |
| L5981 | 功能描述:直流/直流开关调节器 1A STEP-DOWN SWITCH REG 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 |
| L5981_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1 A step-down switching regulator |
| L5981TR | 功能描述:直流/直流开关调节器 1a Step-Down Switching Reg 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 |
| L5983 | 功能描述:直流/直流开关调节器 1.5A STEP-DOWN SWITCHING REGULATOR 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 |
发布紧急采购，3分钟左右您将得到回复。