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参数资料
| 型号： | TPS54073PWPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 25 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | GREEN, PLASTIC, HTSSOP-28 |
| 文件页数： | 6/26页 |
| 文件大小： | 850K |
| 代理商： | TPS54073PWPR |
BIAS AND BOOTSTRAP CAPACITORS
SNUBBER CIRCUIT
DESIGN WITH CERAMIC CAPACITORS
POWER GOOD
ConnecttoOptional
PrechargeVoltage
SLVS547 – FEBRUARY 2005 ............................................................................................................................................................................................ www.ti.com
Every
TPS54073
design
requires
a
bootstrap
R8 and C14 of the application schematic comprise a
capacitor, C3, and a bias capacitor, C4. The
snubber circuit. The snubber is included to reduce
bootstrap capacitor must be a 0.1
F. The bootstrap
over-shoot and ringing on the phase node when the
capacitor is located between the PH pins and BOOT.
internal high side FET turns on. Since the frequency
The bias capacitor is connected between the VBIAS
and amplitude of the ringing depends to a large
pin and AGND. The value should be 1.0
F. Both
degree on parasitic effects, it is best to choose these
capacitors should be high-quality ceramic types with
component values based on actual measurements of
X7R or X5R grade dielectric for temperature stability.
any design layout. See literature number SLUP100
They should be placed as close to the device
for more detailed information on snubber design
connection pins as possible.
Figure 13 shows an application where all ceramic
The TPS54073 is provided with a power-good output
capacitors, including the main output filter capacitor,
pin PWRGD. This output is an open-drain output and
are used. The compensation network components
is intended to be pulled up to a 3.3-V logic supply. A
were calculated using SWIFT Designer Software. See
10-k
pullup works well in this application. The
absolute maximum voltage is 6 V, so care must be
performance graphs, and switching waveforms for
taken not to connect this pull up to Vin if the
this circuit.
maximum input voltage exceeds 6 V.
Figure 13. 1.5 V Power Supply With Ceramic Output Capacitors
14
Copyright 2005, Texas Instruments Incorporated
Product Folder Link(s): TPS54073
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相关代理商/技术参数 |
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| TPS54073PWPRG4 | 功能描述:直流/直流开关调节器 2.2V-4.0V 14A Sync Buck Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS5410 | 制造商:TI 制造商全称:Texas Instruments 功能描述:1-A, WIDE INPUT RANGE, STEP-DOWN SWIFT CONVERTER |
| TPS5410D | 功能描述:直流/直流开关调节器 5.5V to 36V Input 1A Step Down Conv RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS5410DG4 | 功能描述:直流/直流开关调节器 5.5V to 36V Input 1A Step Down Conv RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS5410DR | 功能描述:直流/直流开关调节器 5.5V-36V Input 1A Step Down Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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