參數(shù)資料
型號(hào)： TPS40022PWPR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 0.01 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝： POWERPAD, PLASTIC, HTSSOP-16
文件頁(yè)數(shù)： 17/29頁(yè)
文件大?。?/td> 337K
代理商： TPS40022PWPR
Product Folder: TPS40021, Enhanced Low Input Voltage (2.25V-5.5V) Buck
Keyword
Part Number
PRODUCT FOLDER | PRODUCT INFO: FEATURES | DESCRIPTION | DATASHEETS | PRICING/AVAILABILITY/PKG |
PRODUCT SUPPORT: APPLICATIONS
TPS40021, Enhanced Low Input Voltage (2.25V-5.5V) Buck
DEVICE STATUS: PREVIEW
FEATURES
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Operating Input Voltage 2.25 V to 5.5 V
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Output Voltage as Low as 0.7 V
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1% Internal 0.7 V Reference
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Predictive Gate Drive N-Channel MOSFET Drivers for Higher Efficiency
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Externally Adjustable Soft-Start and Overcurrent Limit
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Programmable Fixed-Frequency
100 KHz-to-1 MHz Voltage-Mode Control
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Source-Only Current or Source/Sink Current
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Quick Response Output Transient Comparators with Power Good Indication Provide Output Status
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16-Pin PowerPAD Package ( JA = 2°C/W)
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APPLICATIONS
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Networking Equipment
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Telecom Equipment
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Base Stations
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Servers
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DSP Power
PowerPAD and Predictive Gate Drive are trademarks of Texas Instruments.
DESCRIPTION
The TPS4002x family of dc-to-dc controllers are designed for non-isolated synchronous buck regulators, providing enhanced operation and design flexability through user programmability.
The TPS4002x utilizes a proprietary Predictive Gate Drive architecture to minimize the diode conduction losses associated with the high-side and synchronous rectifier N-channel MOSFET transistions. The
integrated charge pump with boost circuit provides a regulated 5-V gate drive for both the high side and synchronous rectifier N-channel MOSFETs. The use of the Predictive Gate Drive and charge
pump/boost circuits combine to provide a highly efficient, smaller and less expensive converter.
Design flexibility is provided through user programmability of such functions as: operating frequency, overcurrent detection thresholds, soft-start ramp time, and external synchronization frequency. The
operating frequency is programmable using a single resistor over a frequency range of 100 kHz to 1 MHz. Higher operating frequencies yield smaller component values for a given converter power level as well
as faster loop closure.
The overcurrent detection is programmable through a single resistor. Programmable overcurrent limit allows the detection threshold to be easily tailored to accommodate different size (RDS(on)) MOSFETs. The
overcurrent function provides pulse-by-pulse current limiting during soft-start and short term transient conditions as well as a fault counter to handle longer duration overcurrent conditions. If a fault is
detected the controller shuts down for a period of time determined by six (6) consecutive soft-start cycles. The controller automatically retries the output every seventh (7th) soft-start cycle.
In addition to determining the off time during a fault condition, the soft-start ramp provides a closed loop controlled ramp of the converter output during startup. Programmability allows the ramp rate to be
adjusted for a wide variety of output L-C component values.
The output voltage transient comparators provide a quick response, first strike, approach to output voltage transients. The output voltage is sensed through a resistor divider at the OSNS pin. If an
overvoltage condition is detected the HDRV gate drive is shut-off and the LDRV gate drive is turned on until the output is returned to regulation. Similarly, if an output undervoltage condition is sensed the
HDRV gate drive goes to 95% duty cycle to pump the output back up quickly. In either case, the PowerGood open drain output pulls low to indicate an output voltage out of regulation condition. The
PowerGood output can be daisy-chained to the SS/SD pin or enable pin of other controllers or converters. The transient comparators can be disabled by simply tying the OSNS pin to VDD.
The TPS4002X can be externally synchronized through the ILIM/SYNC pin up to 1.5× the free-running frequency. This allows multiple contollers to be synchronized to eliminate EMI concerns due to input beat
frequencies between controllers.
file:///G|/imaging/BITTING/CPL/20030422/04212003_9/TXII/042120003_HTML/tps40021.html (1 of 2) [23-Apr-03 10:35:35 AM]
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS40040 制造商:TI 制造商全稱:Texas Instruments 功能描述:LOW PIN COUNT, LOW VIN (2.5 V TO 5.5 V) SYNCHRONOUS BUCK DC-TO-DC CONTROLLER WITH ENABLE
TPS40040DRBR 功能描述:DC/DC 開關(guān)控制器 Lo Vin Synch Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40040DRBRG4 功能描述:DC/DC 開關(guān)控制器 Lo Vin Synch Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40040DRBT 功能描述:DC/DC 開關(guān)控制器 Low Vin Synch Buck DC/DC Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40040DRBT 制造商:Texas Instruments 功能描述:Peak Reflow Compatible (260 C):Yes
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