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| 型号： | TPS62040DRCRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 2.2 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件页数： | 5/30页 |
| 文件大小： | 790K |
| 代理商： | TPS62040DRCRG4 |
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TPS62040
TPS62042, TPS62043
TPS62044, TPS62046
SLVS463B JUNE 2003 REVISED OCTOBER 2005
www.ti.com
13
APPLICATION INFORMATION
ADJUSTABLE OUTPUT VOLTAGE VERSION
When the adjustable output voltage version TPS62040 is used, the output voltage is set by the external resistor
divider. See Figure 15.
The output voltage is calculated as:
VO + 0.5 V
1 ) R1
R2
with R1 + R2 ≤ 1 M and internal reference voltage Vref typical = 0.5 V
R1 + R2 should not be greater than 1 M because of stability reasons. To keep the operating quiescent current to
a minimum, the feedback resistor divider should have high impedance with R1+R2≤1 M. Due to this and the low
reference voltage of Vref = 0.5 V, the noise on the feedback pin (FB) needs to be minimized. Using a capacitive divider
C1 and C2 across the feedback resistors minimizes the noise at the feedback, without degrading the line or load
transient performance.
C1 and C2 should be selected as:
C1 +
1
2
p
10 kHz
R1
with:
R1 = upper resistor of voltage divider
C1 = upper capacitor of voltage divider
For C1 a value should be chosen that comes closest to the calculated result.
C2 + R1
R2
C1
with:
R2 = lower resistor of voltage divider
C2 = lower capacitor of voltage divider
For C2, the selected capacitor value should always be selected larger than the calculated result. For example, in
Figure 15 for C2 100 pF are selected for a calculated result of C2 = 88.42 pF.
If quiescent current is not a key design parameter C1 and C2 can be omitted, and a low impedance feedback divider
has to be used with R1 + R2 < 100 k. This reduces the noise available on the feedback pin (FB) as well but increases
the overall quiescent current during operation. The higher the programmed output voltage the lower the feedback
impedance has to be for best operation when not using C1 and C2.
VIN
EN
MODE
SW
FB
PGND
SW
GND
2
3
1
49
10
5
7
8
6
TPS62040
C3
10 F
VI
2.5 V to 6 V
L1
10 H
C4
10 F
VO
1.8 V / 1.2 A
R1
470 k
R2
180 k
C1
33 pF
C2
100 pF
Figure 15. Adjustable Output Voltage Version
(3)
(4)
(5)
相关PDF资料 |
PDF描述 |
|---|---|
| TPS62040DGQR | 2.2 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS62043DRC | 2.2 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS62040DRC | 2.2 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS62052DGSR | 1.4 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS62056DGS | 1.4 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS62040EVM-229 | 功能描述:电源管理IC开发工具 TPS62040-229 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 |
| TPS62042DGQ | 功能描述:直流/直流开关调节器 1.5V Out/1.2A Hi-Eff 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 |
| TPS62042DGQG4 | 功能描述:直流/直流开关调节器 1.5V Out/1.2A Hi-Eff 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 |
| TPS62042DGQR | 功能描述:直流/直流开关调节器 1.5V Out/1.2A Hi-Eff 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 |
| TPS62042DGQRG4 | 功能描述:直流/直流开关调节器 1.5V Out/1.2A Hi-Eff 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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