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參數資料
| 型號： | TPS62270DRVR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 0.84 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | 2 X 2 MM, 0.80 MM HEIGHT, GREEN, PLASTIC, SON-6 |
| 文件頁數： | 6/24頁 |
| 文件大?。?/td> | 882K |
| 代理商： | TPS62270DRVR |
Enable
Soft Start
Short-Circuit Protection
Thermal Shutdown
SLVS799C – NOVEMBER 2007 – REVISED JANUARY 2009 ........................................................................................................................................... www.ti.com
Table 1. VSEL Output Voltage Selection
OUTPUT VOLTAGE VOUT
DEVICE
VSEL = low
VSEL = high
TPS62270
0.9 V
1.15 V
TPS62272
2.1V
3.3V
TPS62273
2.5V
3.3V
The device is enabled setting EN pin to high. During the start up time tStart up the internal circuits are settled.
Afterwards the device activates the soft start circuit. The EN input can be used to control power sequencing in a
system with various DC/DC converters. The EN pin can be connected to the output of another converter, to drive
the EN pin high and getting a sequencing of supply rails.
The TPS62270 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 within typ. 250
s. This limits the inrush current in the
converter during start up and prevents possible input voltage drops when a battery or high impedance power
source is used. The Soft start circuit is enabled after the start up time tStart up has expired.
The High Side and Low Side MOSFET switches are short-circuit protected with maximum output current = ILIMF.
Once the High Side MOSFET switch reaches its current limit, it is turned off and the Low Side MOSFET switch is
turned on. The High Side MOSFET switch can only turn on again, once the current in the Low Side MOSFET
switch decreases below its current limit.
As soon as the junction temperature, TJ, exceeds 150°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.
14
Copyright 2007–2009, Texas Instruments Incorporated
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相關代理商/技術參數 |
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| TPS62270DRVRG4 | 功能描述:直流/直流開關調節器 2.25MHz 400mA 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 |
| TPS62270DRVT | 功能描述:直流/直流開關調節器 2.25MHz 400mA 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 |
| TPS62270DRVTG4 | 功能描述:直流/直流開關調節器 2.25MHz 400mA 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 |
| TPS62270EVM-306 | 功能描述:電源管理IC開發工具 TPS62270EVM-306 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 |
| TPS62272DRVR | 功能描述:直流/直流開關轉換器 2.25MHz 400mA Step- Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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