- 您现在的位置：买卖IC网 > PDF目录296599 > MP2562DS-LF (MONOLITHIC POWER SYSTEMS INC) SWITCHING REGULATOR, 4800 kHz SWITCHING FREQ-MAX, PDSO8 PDF资料下载
参数资料
| 型号： | MP2562DS-LF |
| 厂商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 4800 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | ROHS COMPLIANT, MS-012AA, SOIC-8 |
| 文件页数： | 2/20页 |
| 文件大小： | 563K |
| 代理商： | MP2562DS-LF |
MP2562 – 1A, 4MHz, 50V STEP-DOWN CONVERTER
MP2562 Rev. 0.91
www.MonolithicPower.com
10
4/5/2010
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2010 MPS. All Rights Reserved.
APPLICATION INFORMATION
COMPONENT SELECTION
Setting the Output Voltage
The output voltage is set using a resistive
voltage divider from the output voltage to FB pin.
The voltage divider divides the output voltage
down to the feedback voltage by the ratio:
2
R
1
R
2
R
V
OUT
FB
+
=
Thus the output voltage is:
2
R
)
2
R
1
R
(
V
FB
OUT
+
=
About 20A current from high side BS circuitry
can be seen at the output when the MP2562 is
at no load. In order to absorb this small amount
of current, keep R2 under 40K.
A typical
value for R2 can be 40.2k. With this value, R1
can be determined by:
)
k
)(
8
.
0
V
(
25
.
50
1
R
OUT
Ω
×
=
For example, for a 3.3V output voltage, R2 is
40.2k, and R1 is 127k.
Inductor
The inductor is required to supply constant
current to the output load while being driven by
the switched input voltage. A larger value
inductor will result in less ripple current that will
result in lower output ripple voltage. However,
the larger value inductor will have a larger
physical size, higher series resistance, and/or
lower saturation current.
A good rule for determining the inductance to
use is to allow the peak-to-peak ripple current in
the inductor to be approximately 30% of the
maximum switch current limit. Also, make sure
that the peak inductor current is below the
maximum switch current limit. The inductance
value can be calculated by:
×
=
IN
OUT
L
S
OUT
V
1
ΔI
f
V
1
L
Where VOUT is the output voltage, VIN is the input
voltage, fS is the switching frequency, and ΔIL is
the peak-to-peak inductor ripple current.
Choose an inductor that will not saturate under
the maximum inductor peak current. The peak
inductor current can be calculated by:
×
+
=
IN
OUT
S
OUT
LOAD
LP
V
1
L
f
2
V
I
Where ILOAD is the load current.
Table 1 lists a number of suitable inductors
from various manufacturers. The choice of
which style inductor to use mainly depends on
the price vs. size requirements and any EMI
requirement.
相关PDF资料 |
PDF描述 |
|---|---|
| MP258W | |
| MP254W | |
| MP2510W | |
| MP252W | |
| MP2505W | |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MP2562DS-LF-Z | 功能描述:开关变换器、稳压器与控制器 1A/50V, 4MHz Non-sync Buck RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MP2565DN-LF | 功能描述:开关变换器、稳压器与控制器 2.5A, 4MHz, 50V Step-Down Converter RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MP2565-DN-LF-Z | 制造商:Monolithic Power Systems 功能描述:2.5A, 4MHZ, 50V STEP-DOWN CONVERTER, - Bulk |
| MP2565DN-LF-Z | 功能描述:开关变换器、稳压器与控制器 2.5A, 4MHz, 50V Step-Down Converter RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| MP2565DQ-LF-P | 功能描述:开关变换器、稳压器与控制器 2.5A, 4MHz, 50V Step-Down Converter RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。