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| 型号： | TPS40222DRPTG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3.5 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, VSON-6 |
| 文件页数： | 2/27页 |
| 文件大小： | 662K |
| 代理商： | TPS40222DRPTG4 |
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APPLICATION INFORMATION
Typical Application
R2
C1
C2
C3
L1
R1
D1
2
3
5
4
AVIN
PVIN
FB
GND
SW
6
BOOST
VOUT
VIN
UDG04131
TPS40222
1
Voltage Setting
V
OUT + VFB
1 )
R1
R2
(3)
Output Filter (L1 and C3)
SLUS642A – OCTOBER 2005 – REVISED JANUARY 2006
Figure 9. Typical Application
The output voltage may be set by knowing that the feedback voltage is 0.8 V and using Equation 3. To determine
an output voltage, choose a convenient resistor value for R2 and calculate R1.
Since the loop compensation is internally fixed and cannot be changed, loop stability can only be controlled by
the proper choice of output inductance and capacitance. Table 2 provides a shortcut guide to this selection and
recommended capacitance to maintain a safe 50 degrees of phase margin for various inductors and output
voltages. The table also shows the minimum capacitance for 50 degress of phase margin at three temperatures,
with the worst case for stability at -40
°C. The granularity of the table is sufficient so the user can interpolate
between values to find a specific operating condition. The table values assume a full load, which is also the worst
case for phase compensation. As an example of using the table, consider a 2.5-V output converter with a 2.2-
H
inductor. The table shows that a minimum of 15-
F of output capacitance is required to guarantee greater than
50 degress of phase margin at the worst case temperature of -40
°C. With a lead capacitor (C
LEAD) added to the
feedback as shown in Figure 10, this minimum capacitance increases to 26-
F and the closed-loop frequency
increases by about 20%.
10
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相关代理商/技术参数 |
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|---|---|
| TPS40222EVM-001 | 功能描述:电源管理IC开发工具 Non-Sync Buck Conv 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 |
| TPS40-23 | 制造商:TOTAL-POWER 制造商全称:TOTAL-POWER 功能描述:40 WATT OPEN - FRAME SWITCHING POWER SUPPLY |
| TPS40-24 | 制造商:TOTAL-POWER 制造商全称:TOTAL-POWER 功能描述:40 WATT OPEN - FRAME SWITCHING POWER SUPPLY |
| TPS40-25 | 制造商:TOTAL-POWER 制造商全称:TOTAL-POWER 功能描述:40 WATT OPEN - FRAME SWITCHING POWER SUPPLY |
| TPS40-30 | 制造商:TOTAL-POWER 制造商全称:TOTAL-POWER 功能描述:40 WATT OPEN - FRAME SWITCHING POWER SUPPLY |
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