- 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： | 5/20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
13
4/5/2010
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2010 MPS. All Rights Reserved.
In
this
case
(as
shown
in
TYPICAL
APPLICATION), a third pole set by the
compensation
capacitor
(C6)
and
the
compensation
resistor
(R3)
is
used
to
compensate the effect of the ESR zero on the
loop gain. This pole is located at:
3
R
6
C
2
1
f 3
P
×
π
=
The goal of compensation design is to shape
the converter transfer function to get a desired
loop gain. The system crossover frequency
where the feedback loop has the unity gain is
important. Lower crossover frequencies result
in slower line and load transient responses,
while higher crossover frequencies could cause
system unstable. A good rule of thumb is to set
the crossover frequency to approximately one-
tenth of the switching frequency. The Table 3
lists the typical values of compensation
components for some standard output voltages
with various output capacitors and inductors.
The values of the compensation components
have
been
optimized
for
fast
transient
responses and good stability at given conditions.
Table 3—Compensation Values for Typical
Output Voltage/Capacitor Combinations
VOUT
(V)
L (H)
C2
(F)
R3
(k)
C3
(pF)
C6
(pF)
1.8
4.7
22
120
100
None
2.5
4.7 - 6.8
22
82
330
None
3.3
6.8 -10
22
120
220
None
5
15 - 22
22
158
150
None
12
22 - 33
22
287
150
None
To optimize the compensation components for
conditions not listed in Table 3, the following
procedure can be used.
1. Choose the compensation resistor (R3) to set
the desired crossover frequency. Determine the
R3 value by the following equation:
FB
OUT
CS
EA
C
V
G
f
2
C
2
3
R
×
π
=
Where fC is the desired crossover frequency.
2. Choose the compensation capacitor (C3) to
achieve
the
desired
phase
margin.
For
applications with typical inductor values, setting
the compensation zero, fZ1, below one forth of
the crossover frequency provides sufficient
phase margin. Determine the C3 value by the
following equation:
C
f
3
R
2
4
3
C
×
π
>
3. Determine if the second compensation
capacitor (C6) is required. It is required if the
ESR zero of the output capacitor is located at
less than half of the switching frequency, or the
following relationship is valid:
2
f
R
2
C
2
1
S
ESR
<
×
π
If this is the case, then add the second
compensation capacitor (C6) to set the pole fP3
at the location of the ESR zero. Determine the
C6 value by the equation:
3
R
2
C
6
C
ESR
×
=
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。