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參數(shù)資料
| 型號： | TPS5401DGQ |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | GREEN, PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 8/41頁 |
| 文件大?。?/td> | 1149K |
| 代理商： | TPS5401DGQ |
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V
EN
V
SS/TR
VVSENSE
V
OUT
SLVSAB0 – DECEMBER 2010
www.ti.com
DETAILED DESCRIPTION (continued)
Figure 29. Operation of SS/TR Pin When Starting
Overload Recovery Circuit
The TPS5401 has an overload recovery (OLR) circuit. The OLR circuit slow-starts the output from the overload
voltage to the nominal regulation voltage once the fault condition is removed. The OLR circuit discharges the
SS/TR pin to a voltage slightly greater than the VSENSE pin voltage using an internal pulldown of 100 mA when
the error amplifier is changed to a high voltage from a fault condition. When the fault condition is removed, the
output slow-starts from the fault voltage to nominal output voltage.
Sequencing
Many of the common power-supply sequencing methods can be implemented using the SS/TR, EN and PWRGD
pins. The sequential method can be implemented using an open-drain output of a power-on-reset pin of another
device. The sequential method is illustrated in Figure 30 using two TPS5401 devices. The power good is coupled
to the EN pin on the TPS5401, which enables the second power supply once the primary supply reaches
regulation. If needed, a 1-nF ceramic capacitor on the EN pin of the second power supply provides a 1-ms
start-up delay. Figure 31 shows the results of Figure 30.
16
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS5401
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| TPS5401DGQR | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.5V-42Vin,0.5A Step Down SWIFT RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| TPS5401DGQT | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.5V-42Vin,0.5A Step Down SWIFT RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| TPS5401EVM-708 | 功能描述:電源管理IC開發(fā)工具 Eval Mod for TPS5401 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS5402 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.5-V TO 28-V INPUT VOLTAGE, 1.7-A OUTPUT CURRENT, NON-SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED MOSFET |
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