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參數資料
| 型號： | TPS62562DRVR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 0.6 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 2 X 2 MM, 0.80 MM HEIGHT, GREEN, PLASTIC, SON-6 |
| 文件頁數： | 8/30頁 |
| 文件大?。?/td> | 1664K |
| 代理商： | TPS62562DRVR |
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SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009
www.ti.com
ENABLE
The device is enabled by setting the EN terminal to high. During the start-up time tStart Up, the internal circuits are
settled and the soft-start circuit is activated. The EN input can be used to control power sequencing in a system
with various dc/dc converters. The EN terminal can be connected to the output of another converter, to drive the
EN terminal high to achieve a sequencing of the given supply rails. With EN = GND, the device enters shutdown
mode, in which all internal circuits are disabled. In fixed-output-voltage versions, the internal resistor divider
network is then disconnected from the FB terminal.
SOFT START
The TPS62560 has an internal soft-start circuit that controls the ramp-up of the output voltage. The output
voltage ramps up from 5% to 95% of its nominal value typically within 250
μs. This limits the inrush current into
the converter during ramp-up and prevents possible input voltage drops when a battery or high-impedance power
source is used. The soft-start circuit is enabled within the start-up time tStart Up.
SHORT-CIRCUIT PROTECTION
The high-side and low-side MOSFET switches are short-circuit protected with maximum switch current = ILIMF.
The current in the switches is monitored by current-limit comparators. Once the current in the high-side MOSFET
switch exceeds the threshold of its current-limit comparator, it turns off and the low-side MOSFET switch is
activated to ramp down the current in the inductor and high-side MOSFET switch. The high-side MOSFET switch
can only turn on again after the current in the low-side MOSFET switch has decreased below the threshold of its
current-limit comparator.
THERMAL SHUTDOWN
As soon as the junction temperature, TJ, exceeds 140°C (typical), the device goes into thermal shutdown. In this
mode, the high-side and low-side MOSFETs are turned off. The device continues its operation when the junction
temperature falls below the thermal shutdown hysteresis.
16
Copyright 2008–2009, Texas Instruments Incorporated
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相關代理商/技術參數 |
參數描述 |
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| TPS62562DRVT | 功能描述:直流/直流開關調節器 2.25MHz 600mA Step- Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62590DRVR | 功能描述:直流/直流開關調節器 2.25MHz 1A Step-Down Cnvrtr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62590DRVT | 功能描述:直流/直流開關調節器 2.25MHz 1A Step-Down Cnvrtr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62590EVM-454 | 功能描述:電源管理IC開發工具 TPS62590EVM-454 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS62590TDRVRQ1 | 功能描述:直流/直流開關調節器 AC 2.25MHz 600mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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