參數(shù)資料
型號(hào)： TPS57114QRTERQ1
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PQCC16
封裝： 3 X 3 MM, GREEN, PLASTIC, WQFN-16
文件頁(yè)數(shù)： 9/37頁(yè)
文件大?。?/td> 1309K
代理商： TPS57114QRTERQ1
Clock
Source
PLL
R
T
RT/CLK
TPS57114-Q1
SYNCClock=2V/div
PH=2V/div
Time=500nsec/div
SLVSAH5A
– DECEMBER 2010 – REVISED MARCH 2011
REVERSE OVERCURRENT PROTECTION
The TPS57114 -Q1 implements low side current protection by detecting the voltage across the low side
MOSFET. When the converter sinks current through its low side FET, the control circuit turns off the low side
MOSFET if the reverse current is typically more than 4.5 A. By implementing this additional protection scheme,
the converter is able to protect itself from excessive current during power cycling and start-up into pre-biased
outputs.
SYNCHRONIZE USING THE RT/CLK PIN
The RT/CLK pin is used to synchronize the converter to an external system clock. See Figure 29. To implement
the synchronization feature in a system, connect a square wave to the RT/CLK pin with an on time of at least
75ns. If the pin is pulled above the PLL upper threshold, a mode change occurs and the pin becomes a
synchronization input. The internal amplifier is disabled and the pin is a high impedance clock input to the
internal PLL. If clocking edges stop, the internal amplifier is re-enabled and the mode returns to the frequency set
by the resistor. The square wave amplitude at this pin must transition lower than 0.6 V and higher than 1.6 V
typically. The synchronization frequency range is 300 kHz to 2000 kHz. The rising edge of the PH is
synchronized to the falling edge of RT/CLK pin.
Figure 29. Synchronizing to a System Clock
Figure 30. Plot of Synchronizing to System Clock
POWER GOOD (PWRGD PIN)
The PWRGD pin output is an open drain MOSFET. The output is pulled low when the VSENSE voltage enters
the fault condition by falling below 91% or rising above 109% of the nominal internal reference voltage. There is
a 2% hysteresis on the threshold voltage, so when the VSENSE voltage rises to the good condition above 93%
or falls below 107% of the internal voltage reference the PWRGD output MOSFET is turned off. It is
recommended to use a pull-up resistor between the values of 1k
and 100k to a voltage source that is 6 V or
less. The PWRGD is in a valid state once the VIN input voltage is greater than 1.1 V.
OVERVOLTAGE TRANSIENT PROTECTION
The TPS57114 -Q1 incorporates an overvoltage transient protection (OVTP) circuit to minimize voltage
overshoot when recovering from output fault conditions or strong unload transients. The OVTP feature minimizes
the output overshoot by implementing a circuit to compare the VSENSE pin voltage to the OVTP threshold which
is 109% of the internal voltage reference. If the VSENSE pin voltage is greater than the OVTP threshold, the high
side MOSFET is disabled preventing current from flowing to the output and minimizing output overshoot. When
the VSENSE voltage drops lower than the OVTP threshold the high side MOSFET is allowed to turn on the next
clock cycle.
THERMAL SHUTDOWN
The device implements an internal thermal shutdown to protect itself if the junction temperature exceeds 168
°C.
The thermal shutdown forces the device to stop switching when the junction temperature exceeds the thermal
trip threshold. Once the die temperature decreases below 148
°C, the device reinitiates the power up sequence
by discharging the SS pin to below 60 mV. The thermal shutdown hysteresis is 20
°C.
Copyright
2010–2011, Texas Instruments Incorporated
17
Product Folder Link(s): TPS57114 -Q1
相關(guān)PDF資料
PDF描述
TPS60100PWP 0.2 A SWITCHED CAPACITOR REGULATOR, 400 kHz SWITCHING FREQ-MAX, PDSO20
TPS60101PWPG4 SWITCHED CAPACITOR REGULATOR, 400 kHz SWITCHING FREQ-MAX, PDSO20
TPS60101PWPRG4 0.1 A SWITCHED CAPACITOR REGULATOR, 400 kHz SWITCHING FREQ-MAX, PDSO20
TPS60230RGTTG4 0.2 A SWITCHED CAPACITOR REGULATOR, 1250 kHz SWITCHING FREQ-MAX, PQCC16
TPS60230RGTT 0.2 A SWITCHED CAPACITOR REGULATOR, 1250 kHz SWITCHING FREQ-MAX, PQCC16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS57140MDRCREP 功能描述:Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1.5A 10-VFDFN Exposed Pad 制造商:texas instruments 系列:SWIFT?? 包裝:剪切帶（CT） 零件狀態(tài):有效 功能:降壓 輸出配置:正 拓?fù)?降壓 輸出類型:可調(diào)式 輸出數(shù):1 電壓 - 輸入（最小值）:3.5V 電壓 - 輸入（最大值）:42V 電壓 - 輸出（最小值/固定）:0.8V 電壓 - 輸出（最大值）:39V 電流 - 輸出:1.5A 頻率 - 開關(guān):100kHz ~ 2.5MHz 同步整流器:無 工作溫度:-55°C ~ 125°C（TA） 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應(yīng)商器件封裝:10-VSON（3x3） 標(biāo)準(zhǔn)包裝:1
TPS57140QDGQRQ1 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.5-42Vin,1.5A Step Down Cnvrtr 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
TPS57140QDRCRQ1 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.5-42Vin,1.5A Step Down Cnvrtr 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
TPS57160-Q1EVM 功能描述:EVAL MODULE FOR TPS57160-Q1 制造商:texas instruments 系列:SWIFT??，Eco-Mode?? 零件狀態(tài):在售 主要用途:DC/DC，步降 輸出和類型:1，非隔離 電壓 - 輸出:5V 電流 - 輸出:1A 電壓 - 輸入:9 V ~ 16 V 穩(wěn)壓器拓?fù)?降壓 頻率 - 開關(guān):2MHz 板類型:完全填充 所含物品:板 使用的 IC/零件:TPS57160-Q1 標(biāo)準(zhǔn)包裝:1
TPS57160QDGQRQ1 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.5-60V,1.5A Step Down SWIFT Converter 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*