- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄98285 > TPS65257RHAT (TEXAS INSTRUMENTS INC) 4 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, PQCC40 PDF資料下載
參數(shù)資料
| 型號(hào)： | TPS65257RHAT |
| 廠(chǎng)商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封裝： | 6 X 6 MM, GREEN, PLASTIC, VQFN-40 |
| 文件頁(yè)數(shù)： | 12/34頁(yè) |
| 文件大小： | 2100K |
| 代理商： | TPS65257RHAT |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)當(dāng)前第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)
SLVSB32
– SEPTEMBER 2011
The device incorporates an overvoltage transient protection circuit to minimize voltage overshoot. The OVP
feature minimizes the output overshoot by implementing a circuit to compare the FB pin voltage to OVP threshold
which is 109% of the internal voltage reference. If the FB 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 FB voltage drops lower than the OVP lower threshold which is 107%, the high side MOSFET is
allowed to turn on the next clock cycle.
TPS65257 features a supervisor circuit which monitors each buck
’s output and the PGOOD pin is asserted once
sequencing is done. The PGOOD pin is an open drain output. The PGOOD pin is pulled low when any buck
converter is pulled below 85% of the nominal output voltage. The PGOOD is pulled up when all converter outputs
are more than 90% of its nominal output voltage. The default reset time is 100 ms. The polarity of the PGOOD is
active high.
The push button operation has been designed to allow for automatic system start when the input supply is
applied or to provide an integrated ON/OFF system management without the need of additional external
components. The behavior of the device will depend on the status of the INT pin (see start-up signals).
The USB switch provides up to 1-A of current as required by downstream USB devices. When the output load
exceeds the current-limit threshold or a short is present, the PMU limits the output current to a safe level by
switching into a constant-current mode and pulling the over current logic output low. When continuous heavy
overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise,
a thermal warning protection circuit shuts off the USB switch and allows the buck converters to carry on
operating.
The device implements an internal thermal shutdown to protect itself if the junction temperature exceeds 160
°C.
The thermal shutdown forces the device to stop operating when the junction temperature exceeds thermal trip
threshold. Once the die temperature decreases below 140
°C, the device reinitiates the power up sequence. The
thermal shutdown hysteresis is 20
°C.
ORDERING INFORMATION(1)
TA
PACKAGE(2)
PART NUMBER
TOP-SIDE MARKING
Reel of 2500
TPS65257RHAR
-40
°C to 125°C
40-Pin (QFN) - RHA
TPS65257
Reel of 250
TPS65257RHAT
(1)
For the most current packaging and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2)
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
2
Copyright
2011, Texas Instruments Incorporated
Product Folder Link(s): TPS65257
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS65510RGTRG4 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| TPS65510RGTTG4 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC16 |
| TPS65530ARSLR | 0.6 A BATTERY CHARGE CONTROLLER, 1650 kHz SWITCHING FREQ-MAX, PQCC48 |
| TPS65530ARSLT | 0.6 A BATTERY CHARGE CONTROLLER, 1650 kHz SWITCHING FREQ-MAX, PQCC48 |
| TPS65530RSLRG4 | 3.3 A SWITCHING REGULATOR, 1650 kHz SWITCHING FREQ-MAX, PQCC48 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS65258EVM | 功能描述:電源管理IC開(kāi)發(fā)工具 TPS65258 EVAL MOD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS65258RHAR | 功能描述:PMIC 解決方案 3 DC-DC CONVERTERS RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65258RHAT | 功能描述:PMIC 解決方案 3 DC-DC CONVERTERS RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65261-1RHBR | 功能描述:Buck Switching Regulator IC Positive Adjustable 0.6V 3 Output 3A, 2A 32-VFQFN Exposed Pad 制造商:texas instruments 系列:- 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(lèi)型:可調(diào)式 輸出數(shù):3 電壓 - 輸入（最小值）:4.5V 電壓 - 輸入（最大值）:18V 電壓 - 輸出（最小值/固定）:0.6V 電壓 - 輸出（最大值）:18V 電流 - 輸出:3A，2A 頻率 - 開(kāi)關(guān):250kHz ~ 2MHz 同步整流器:是 工作溫度:-40°C ~ 85°C（TA） 安裝類(lèi)型:表面貼裝 封裝/外殼:32-VFQFN 裸露焊盤(pán) 供應(yīng)商器件封裝:32-VQFN（5x5） 標(biāo)準(zhǔn)包裝:1 |
| TPS65261-1RHBT | 功能描述:IC REG BCK ADJ 3A/2A TRPL 32VQFN 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 功能:降壓 輸出配置:正 拓?fù)?降壓 輸出類(lèi)型:可調(diào)式 輸出數(shù):3 電壓 - 輸入（最小值）:4.5V 電壓 - 輸入（最大值）:18V 電壓 - 輸出（最小值/固定）:0.6V 電壓 - 輸出（最大值）:18V 電流 - 輸出:3A，2A 頻率 - 開(kāi)關(guān):250kHz ~ 2MHz 同步整流器:是 工作溫度:-40°C ~ 85°C（TA） 安裝類(lèi)型:表面貼裝 封裝/外殼:32-VFQFN 裸露焊盤(pán) 供應(yīng)商器件封裝:32-VQFN（5x5） 標(biāo)準(zhǔn)包裝:1 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。