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參數(shù)資料
| 型號(hào)： | 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)： | 11/52頁 |
| 文件大小： | 1858K |
| 代理商： | L5988D |
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L5988D
Functional description
Doc ID 15324 Rev 3
19/52
During normal operation the CSS is discharged with a constant current of 22 μA (typ.) only if:
●
HICCUP mode is triggered (see 5.5.2)
●
the input voltage goes below the UVLO threshold (see 5.5.3)
●
the internal temperature is over 150°C (see 5.5.4)
A new SS cycle will start when the VSS drops below the INH threshold.
New high performance ICs often require more than one supply voltage. Most of these
applications require well defined start-up sequencing, in order to avoid potential damage
and latch-up of the processing core. Sharing the same soft-start capacitor for a set of
regulators, the output voltages increase with the same slew rate implementing a
“simultaneous start-up” sequencing method.
5.5
Monitoring and protections
5.5.1
Overvoltage
The device provides the overvoltage protection monitoring the output voltage through the FB
pin. If the voltage sensed on FB pin reaches a value 20% (typ.) greater than the reference of
the error amplifier, the low-side MOSFET is turned on to discharge as fast as possible the
output capacitor. It is possible to set two different behaviors in case of OVP:
●
In case the OVP latched mode is active (see 5.1), the internal oscillator is suspended
and the low side switch will be kept on until the input voltage goes below the selected
UVLO threshold or the SS/INH pin is forced below the INH threshold.
●
In case of NOT latched OVP mode is active, the low side MOS is forced ON until the
feedback voltage is higher than the OVP threshold (20% greater than the reference of
the error amplifier).
Figure 9.
OVP not latched
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| 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(shí)間: 下降時(shí)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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