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参数资料
| 型号： | TPS54521RHLT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PQCC14 |
| 封装： | GREEN, PLASTIC, QFN-14 |
| 文件页数： | 1/40页 |
| 文件大小： | 1194K |
| 代理商： | TPS54521RHLT |
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0.5
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS54525 | 制造商:TI 制造商全称:Texas Instruments 功能描述:4.5V to 18V Input, 5.5-A Synchronous Step-Down Converter |
| TPS54525EVM-608 | 功能描述:电源管理IC开发工具 TPS54525 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS54525PWP | 功能描述:直流/直流开关转换器 4.5-18V Input,5.5A Sync SD Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TPS54525PWPR | 功能描述:直流/直流开关转换器 4.5-18V Input,5.5A Sync SD Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TPS54526 | 制造商:TI 制造商全称: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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