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| 型号： | TPS54160DGQR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | GREEN, PLASTIC, MSOP-10 |
| 文件页数： | 9/50页 |
| 文件大小： | 1375K |
| 代理商： | TPS54160DGQR |
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SS /TR
TPS54160
EN
PWRGD
SS /TR
EN
PWRGD
EN1
PWRGD1
VOUT1
VOUT2
EN1,EN2
VOUT1
VOUT2
EN
TPS54160
3
SS/TR
4
PWRGD
6
EN
TPS54160
3
SS/TR
4
PWRGD
6
www.ti.com
SLVS795C – OCTOBER 2008 – REVISED OCTOBER 2010
DETAILED DESCRIPTION (continued)
Sequencing
Many of the common power supply sequencing methods can be implemented using the SS/TR, EN and PWRGD
pins. The sequential method can be implemented using an open drain output of a power on reset pin of another
device. The sequential method is illustrated in Figure 32 using two TPS54160 devices. The power good is
coupled to the EN pin on the TPS54160 which enables the second power supply once the primary supply
reaches regulation. If needed, a 1nF ceramic capacitor on the EN pin of the second power supply provides a
1-ms start-up delay. Figure 33 shows the results of Figure 32.
Figure 32. Schematic for Sequential Start-Up
Figure 33. Sequential Startup using EN and
Sequence
PWRGD
Figure 34. Schematic for Ratiometric Start-Up
Figure 35. Ratio-Metric Startup using Coupled
Using Coupled SS/TR Pins
SS/TR pins
Figure 34 shows a method for ratio-metric start up sequence by connecting the SS/TR pins together. The
regulator outputs ramp up to reach regulation at the same time. When calculating the slow start time the pull up
Copyright 2008–2010, Texas Instruments Incorporated
17
Product Folder Link(s): TPS54160
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| TPS54160DGQRG4 | 功能描述:直流/直流开关调节器 3.5-60V,1.5A Step Down SWIFT 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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