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參數(shù)資料
| 型號(hào)： | MP2303 |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter |
| 中文描述： | 第3A，28V的，340KHz的同步整流降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 395K |
| 代理商： | MP2303 |
MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE
MP2303 Rev. 0.92
5/2/2006
www.MonolithicPower.com
11
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
TM
To optimize the compensation components for
conditions not listed in Table 2, 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
V
CS
EA
C
V
G
G
f
2
C
×
2
3
R
×
×
×
π
=
Where f
C
is the desired crossover frequency,
34KHz.
2. Choose the compensation capacitor (C3) to
achieve the desired phase margin. For
applications with typical inductor values, setting
the compensation zero, f
Z1
, 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 340KHz 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 optional
compensation capacitor (C6) to set the pole f
P3
at the location of the ESR zero. Determine the
C6 value by the equation:
3
R
R
2
C
6
C
ESR
×
=
Soft-Start Capacitor
To reduce input inrush current during startup, a
programmable soft-start is provided by
connecting a capacitor (C4) from pin SS to
GND. The soft-start time is given by:
A
6
V
8
4
C
t
SS
μ
×
=
To reduce the susceptibility to noise, do not
leave SS pin open. Use a capacitor with small
value if you do not need soft-start function.
External Bootstrap Diode
It is recommended that an external bootstrap
diode be added when the system has a 5V
fixed input or the power supply generates a 5V
output. This helps improve the efficiency of the
regulator. The bootstrap diode can be a low
cost one such as IN4148 or BAT54.
MP2303
SW
BS
10nF
5V
MP2303_F02
Figure 2—External Bootstrap Diode
This diode is also recommended for high duty
V
>65%) and high output
cycle operation (
IN
OUT
V
voltage (V
OUT
>12V) applications.
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PDF描述 |
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| MP2303_06 | 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter |
| MP2303DN | 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter |
| MP2303DQ | 3A, 28V, 340KHz Synchronous Rectified Step-Down Converter |
| MP2305DS | 4.75V to 23V IN, 2A OUT Synchronous Buck Converter |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MP2303_06 | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:3A, 28V, 340KHz Synchronous Rectified Step-Down Converter |
| MP2303ADN-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 3A, 28V, 360kHz Synchronous Buck RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP2303ADN-LF-Z | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 3A, 28V, 360kHz Synchronous Buck RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP2303DN | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:3A, 28V, 340KHz Synchronous Rectified Step-Down Converter |
| MP2303DN-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 3A, 28V, 360kHz Synchronous Buck RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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