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| 型号： | TPS62238DRY |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | 1 X 1.50 MM, 0.60 MM HEIGHT, PLASTIC, MO-287UFAD, SON-6 |
| 文件页数： | 15/32页 |
| 文件大小： | 1073K |
| 代理商： | TPS62238DRY |
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TPS62230
L
1/2.2 H
m
VIN
EN
MODE
GND
FB
SW
2.5V
VOUT
2.7V-6V
VIN
2.2
CIN
mF
4.7 F
m
COUT
1.8V
VOUT
2.05V-6V
VIN
2.2 F
m
CIN
L
1/2.2 H
m
C
4.7 F
OUT
m
TPS62231
VIN
EN
MODE
SW
FB
GND
1.2V
VOUT
2.05V-6V
VIN
2.2 F
m
CIN
L
1/2.2 H
m
C
4.7 F
OUT
m
TPS62232
VIN
EN
MODE
SW
FB
GND
L
Vout
1
Vin
I
= Vout
L
-
D
L
Lmax
outmax
I
= I
+
2
D
TPS62231, TPS62230, TPS62232, TPS62233, TPS62234, TPS62235
TPS62236, TPS62237, TPS62238, TPS62239, TPS622310, TPS622311
TPS622312, TPS622313, TPS622314, TPS622315, TPS622316, TPS622317
SLVS941D – APRIL 2009 – REVISED AUGUST 2010
www.ti.com
APPLICATION INFORMATION
Figure 50. TPS62230 2.5V Output
Figure 51. TPS62231 1.8V Output
Figure 52. TPS62232 1.2V Output
OUTPUT FILTER DESIGN (INDUCTOR AND OUTPUT CAPACITOR)
The TPS6223X is optimized to operate with effective inductance values in the range of 0.7mH to 4.3mH and with
effective output capacitance in the range of 2.0mF to 15mF. The internal compensation is optimized to operate
with an output filter of L = 1.0mH/2.2mH and COUT = 4.7mF. Larger or smaller inductor/capacitor values can be
used to optimize the performance of the device for specific operation conditions. For more details, see the
CHECKING LOOP STABILITY section.
INDUCTOR SELECTION
The inductor value affects its peak-to-peak ripple current, the PWM-to-PFM transition point, the output voltage
ripple and the efficiency. The selected inductor has to be rated for its dc resistance and saturation current. The
inductor ripple current (
calculates the maximum inductor current under static load conditions. The saturation current of the inductor
should be rated higher than the maximum inductor current as calculated with Equation 5. This is recommended
because during heavy load transient the inductor current will rise above the calculated value.
(4)
(5)
With:
f = Switching Frequency
L = Inductor Value
ΔIL= Peak to Peak inductor ripple current
ILmax = Maximum Inductor current
22
Copyright 2009–2010, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| TPS622315DRYT | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS62236DRYR | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS622310DRYT | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS622313DRYR | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
| TPS62235DRY | 1.22 A SWITCHING REGULATOR, 3800 kHz SWITCHING FREQ-MAX, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS62238DRYR | 功能描述:直流/直流开关转换器 3MHz 500mA Step- Down 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 |
| TPS62238DRYT | 功能描述:直流/直流开关转换器 3MHz 500mA Step- Down 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 |
| TPS62239DRYR | 功能描述:直流/直流开关转换器 3MHz 500mA Step- Down 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 |
| TPS62239DRYT | 功能描述:直流/直流开关转换器 3MHz 500mA Step- Down 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 |
| TPS62239EVM-574 | 功能描述:电源管理IC开发工具 TPS62239 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 |
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