參數(shù)資料
型號： L5988D
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 5.6 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝： LEAD FREE, HTSSOP-16
文件頁數(shù)： 16/52頁
文件大?。?/td> 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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L5988DTR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4A Step Down Reg 2.9V to 18V 200ns RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5989D 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4A cont 5A pulsed step-down sw RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5989DTR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4A cont 5A pulsed step-down sw RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5991 功能描述:電流型 PWM 控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
L5991_01 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PRIMARY CONTROLLER WITH STANDBY
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