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参数资料
| 型号： | L4973D3.3 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 5.5 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | LEAD FREE, SOP-20 |
| 文件页数： | 23/28页 |
| 文件大小： | 637K |
| 代理商： | L4973D3.3 |
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Pin settings
L4973
4/28
2.2
Pin description
Note:
1
The maximum power dissipation of the package must be observed.
Table 1.
Pin description
N° Pin
Name
Description
DIP-18
SO-20
11
12
COMP
E/A output to be used for frequency compensation
10
11
INH
A logic signal (active high) disables the device (sleep
mode operation). If not used it must be connected to
GND; if floating the device is disabled.
9
10
BOOT
A capacitor connected between this pin and the output
allows to drive the internal D-MOS.
18
20
SYNC
Input/Output synchronization.
7,8
8,9
VCC
Unregulated DC input voltage
2,3
OUT
Stepdown regulator output.
12
13
VFB
Stepdown feedback input. Connecting the output
directly to this pin results in an output voltage of 3.3 V
for the L4973V3.3 and 5.1 V for L4973V5.1. An external
resistive divider is required for higher output voltages.
For output voltage resistive divider is required for higher
output voltages. For output voltage less than 3.3 V, see
Note: 1 and Figure 33.
16
18
V5.1
Reference voltage externally available.
4,5,6
13,14,15
4,5,6,7
14,15,16,17
GND
Signal ground
1
OSC
An external resistor connected between the unregulated
input voltage and Pin 1 and a capacitor connected from
Pin 1 to ground fixes the switching frequency. (Line feed
forward is automatically obtained)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L4973D33-L4973D51 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR |
| L4973D5 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.5A STEP DOWN SWITCHING REGULATOR |
| L4973D5.1 | 功能描述:直流/直流开关调节器 5.1V 3.5A Step-Down 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 |
| L4973D5.1-013TR | 功能描述:直流/直流开关调节器 5.1V 3.5A Step-Down 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 |
| L4973D51 | 制造商:ST MICRO 功能描述:* |
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