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參數(shù)資料
| 型號： | TPS54521RHLT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PQCC14 |
| 封裝： | GREEN, PLASTIC, QFN-14 |
| 文件頁數(shù)： | 1/40頁 |
| 文件大?。?/td> | 1194K |
| 代理商： | TPS54521RHLT |
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0
0.5
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3.5
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4.5
5
Load Current - A
Efficiency
-
%
VOUT = 5 V
VOUT = 3.3 V
VOUT = 1.8 V
VIN = 12 V,
Fsw = 500 kHz
PH
PVIN
GND
BOOT
VSENSE
COMP
TPS54521
EN
RT/CLK
SS/TR
Exposed Thermal PAD
Css
Rrt
R3
C1
Cboot
Co
Lo
R1
R2
Cin
C2
VIN
VIN
VOUT
PWRGD
www.ti.com
SLVS981A – JUNE 2010 – REVISED AUGUST 2010
4.5V to 17V Input, 5A Synchronous Step Down SWIFT Converter
Check for Samples: TPS54521
1
FEATURES
Power Good Output for Undervoltage and
Overvoltage Monitoring
2
Integrated 57m
/ 50m MOSFETs
Adjustable Input Undervoltage Lockout
Split Power Rail: 1.6V to 17V on PVIN
Supported by SwitcherPro Software Tool
200kHz to 900kHz Switching Frequency
For SWIFT Documentation and
Synchronizes to External Clock
SwitcherPro, visit http://www.ti.com/swift
0.8V Voltage Reference
Low 2uA Shutdown Quiescent Current
APPLICATIONS
Hiccup Overcurrent Protection
Flat Panel Digital TVs
Monotonic Start-Up into Prebiased Outputs
Set Top Boxes, Personal Video Recorders
–40°C to 125°C Operating Junction
Net Books
Temperature Range
High Density 3.3V/5V Power Distribution from
12 V Bus
Pin-to-Pin Compatible with the TPS54620
Adjustable Slow Start/Power Sequencing
DESCRIPTION
The TPS54521 is a full featured 17V, 5A synchronous step down converter which is optimized for small designs
through high efficiency and integrated high-side and low-side MOSFETs. Further space savings are achieved
through current mode control, which reduces component count, and by selecting a high switching frequency,
reducing the inductor's footprint.
The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone
power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and
the open drain power good pins.
Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced
by a low-side sourcing current limit which prevents current runaway. Hiccup protection will be triggered if the
overcurrent condition has persisted for longer than the preset time. Thermal shutdown disables the part when die
temperature exceeds thermal shutdown temperature. The TPS54521 is available in a 14 pin, 3.5mm x 3.5mm
QFN, thermally enhanced package.
WHITE SPACE
SIMPLIFIED SCHEMATIC
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
SwitcherPro, SWIFT are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright 2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54525 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter |
| TPS54525EVM-608 | 功能描述:電源管理IC開發(fā)工具 TPS54525 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
| TPS54525PWP | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 4.5-18V Input,5.5A Sync SD 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 |
| TPS54525PWPR | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 4.5-18V Input,5.5A Sync SD 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 |
| TPS54526 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter with Eco-Modea?￠ |
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