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参数资料
| 型号： | L5973ADTR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 2.3 A SWITCHING REGULATOR, PDSO8 |
| 封装： | EXPOSED PAD, HSOP-8 |
| 文件页数： | 20/22页 |
| 文件大小： | 486K |
| 代理商： | L5973ADTR |
L5973AD
Functional description
Doc ID 9552 Rev 9
7/22
4
Functional description
The main internal blocks are shown in Figure 3, where is reported the device block diagram.
They are:
●
A voltage regulator that supplies the internal circuitry. From this regulator, a 3.3 V
reference voltage is externally available.
●
A voltage monitor circuit that checks the input and internal voltages.
●
A fully integrated sawtooth oscillator whose frequency is 500 kHz
●
Two embedded current limitations circuitries which control the current that flows
through the power switch. The Pulse by Pulse Current Limit forces the power switch
OFF cycle by cycle if the current reaches an internal threshold, while the Frequency
Shifter reduces the switching frequency in order to strongly reduce the duty cycle.
●
A transconductance error amplifier.
●
A pulse width modulator (PWM) comparator and the relative logic circuitry necessary to
drive the internal power.
●
An high side driver for the internal P-MOS switch.
●
An inhibit block for stand-by operation.
●
A circuit to realize the thermal protection function.
Figure 3.
Block diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L5973D | 功能描述:开关变换器、稳压器与控制器 1.235 to 35V Step-Dn RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L5973D_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2.5 A switch step down switching regulator?癎 |
| L5973D013TR | 功能描述:直流/直流开关调节器 2.5 A Step-DN 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 |
| L5974AD | 功能描述:直流/直流开关调节器 2A SD switch reg BCD5 220nF 5V 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 |
| L5974ADTR | 功能描述:直流/直流开关调节器 2A SD switch reg BCD5 220nF 5V 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 |
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