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参数资料
| 型号： | TS2509CSRL |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | ROHS COMPLIANT, SOP-8 |
| 文件页数： | 4/9页 |
| 文件大小： | 491K |
| 代理商： | TS2509CSRL |
TS2509
3A / 500KHz PWM Buck Converter
4/9
Version: A09
Function Descriptions
PWM Control
The TS2509 consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of the
TS2509, the pulse width varies in a range from 0 to 100%, according to the load current. The ripple voltage produced
by the switching can easily be removed through a filter because the switching frequency remains constant. Therefore,
these converters provide a low-ripple power over broad ranges of input voltage and load current.
Setting the Output Voltage
Application circuit item shows the basic application circuit with TS2509 adjustable output version. The external resistor
sets the output voltage according to the following equation:
(EL CAP) Resistor select for output voltage setting
(MLCC) Resistor select for output voltage setting
VOUT
R2
R1
VOUT
R2
R1
5V
1.3K
6.8K
5V
7.5K
39K
3.3V
1.5K
4.7K
3.3V
15K
47K
2.5V
2.2K
4.7K
2.5V
22K
47K
1.8V
2K
2.5K
1.8V
27K
33K
1.5V
2.2K
2K
1.5V
30K
27K
1.2V
3K
1.5K
1.2V
30K
15K
1V
10K
2.5K
1V
56K
13K
Inductor Selection
For most designs, the operate with inductors of 10H to 22H. The inductor value can be derived from the following
equation:
L1 Recommend Value (VIN=12V, IOUT=3A)
VOUT
1.8V
2.5V
3.3V
5V
L1 Value
10~15uH
15~22uH
Where is inductor Ripple Current. Large value inductors lower ripple current and small value inductors result in high
ripple currents. Choose inductor ripple current approximately 15% of the maximum load current 3A, ΔIL=0.4A. The DC
current rating of the inductor should be at least equal to the maximum load current plus half the ripple current to
prevent core saturation (3A+0.2A).
Input Capacitor Selection
(EL CAP)
This capacitor should be located close to the IC using short leads and the voltage rating should be approximately 1.5
times the maximum input voltage. The RMS current rating requirement for the input capacitor of a buck regulator is
approximately 12 the DC load current. A low ESR input capacitor sized for maximum RMS current must be used. A
220F low ESR capacitor for most applications is sufficient.
(MLCC)
A 22F MLCC or two 10uF MLCC capacitors for most applications is sufficient.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TS250A | 制造商:Black Box Corporation 功能描述:10/100/1000 COPPER TAP |
| TS250AE | 制造商:Black Box Corporation 功能描述:10/100/1000 COPPER TAP W/UK POWER CORD |
| TS250AE-W1 | 制造商:Black Box Corporation 功能描述:1 YEAR WARRANTY FOR TS250AE |
| TS250AE-W3 | 制造商:Black Box Corporation 功能描述:3 YEAR WARRANTY FOR TS250AE |
| TS250A-W1 | 制造商:Black Box Corporation 功能描述:1 YEAR WARRANTY FOR TS250A |
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