参数资料
型号: L5988D
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: 5.6 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封装: LEAD FREE, HTSSOP-16
文件页数: 16/52页
文件大小: 1858K
代理商: L5988D
L5988D
Functional description
Doc ID 15324 Rev 3
23/52
5.5.4
Thermal shutdown
When the junction temperature reaches 150 °C the device enters in thermal shutdown. Both
MOSFETs are turned off and the soft-start capacitor is discharged with a current of 22 A.
The device doesn’t restart until the junction temperature goes down to 120 °C.
5.6
Minimum on time
The L5988D is based on a voltage mode control loop. The advantage of this technique is the
very short conduction time of the power elements thanks to the proper functioning of the
control loop without a current sense (that is challenging with low conduction times), which
instead is required in current mode regulators. The optimized architecture, the design
solutions and the high performance fabrication technique allow power elements to achieve
extremely short conduction times. This allows very high switching frequency operation even
in very low duty cycle applications. Figure 12 shows how the L5988D can easily manage a
minimum conduction time of 200ns. Moreover, thanks to the embedded P-MOS used for the
high-side, no bootstrap capacitor is required. This means that the device is able to manage
a duty cycle of 100%.
Figure 12.
minimum TON
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相关代理商/技术参数
参数描述
L5988DTR 功能描述:直流/直流开关调节器 4A Step Down Reg 2.9V to 18V 200ns 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
L5989D 功能描述:直流/直流开关调节器 4A cont 5A pulsed step-down sw 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
L5989DTR 功能描述:直流/直流开关调节器 4A cont 5A pulsed step-down sw 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
L5991 功能描述:电流型 PWM 控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
L5991_01 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:PRIMARY CONTROLLER WITH STANDBY