- 您现在的位置：买卖IC网 > PDF目录67754 > L6731BTR (STMICROELECTRONICS) 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 PDF资料下载
参数资料
| 型号： | L6731BTR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | HTSSOP-16 |
| 文件页数： | 3/24页 |
| 文件大小： | 439K |
| 代理商： | L6731BTR |
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
L6731B
Device description
11/24
5.3
Bypassing the LDO to avoid the voltage drop with low Vcc
If VCC
≈ 5V the internal LDO works in dropout with an output resistance of about 1. The
maximum LDO output current is about 100mA and so the output voltage drop is 100mV, to
avoid this the LDO can be bypassed.
5.4
Internal and external references
It is possible to set the internal/external reference and the switching frequency by setting the
proper voltage at the DDR-IN pin. The maximum value of the external reference is 2.5V (typ.):
●
VEAREF from 0% to 80% of VCCDR -> External reference/FSW = 250KHz
●
VEAREF from 80% to 95% of VCCDR -> VREF = 0.6V/FSW=500KHz
●
VEAREF from 95% to 100% of VCCDR -> VREF = 0.6V/FSW=250KHz
Providing an external reference from 0V to 450mV the output voltage will be regulated but
some restrictions must be considered:
●
The minimum OVP threshold is set at 300mV;
●
The under-voltage-protection doesn't work;
●
The PGOOD signal remains low;
To set the resistor divider it must be considered that a 100K pull-down resistor is integrated into
the device (see Figure 5.). Finally it must be taken into account that the voltage at the
DDR-IN
pin is captured by the device at the start-up when VCC is about 4V.
Figure 4.
Bypassing the LDO
相关PDF资料 |
PDF描述 |
|---|---|
| L6731B | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6731D | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L9230-DIE1 | STEPPER MOTOR CONTROLLER, UUC |
| L9230 | STEPPER MOTOR CONTROLLER, PDSO20 |
| LA5680T | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQFP48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6731D | 功能描述:DC/DC 开关控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6731DTR | 功能描述:DC/DC 开关控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6732 | 功能描述:DC/DC 开关控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6732_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6732_0906 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
发布紧急采购，3分钟左右您将得到回复。