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參數資料
| 型號： | MP2307_06 |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 3A, 23V, 340KHz Synchronous Rectified Step-Down Converter |
| 中文描述： | 第3A，為23V，340KHz的同步整流降壓轉換器 |
| 文件頁數： | 6/11頁 |
| 文件大?。?/td> | 353K |
| 代理商： | MP2307_06 |
MP2307 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
MP2307 Rev. 1.7
3/14/2006
www.MonolithicPower.com
6
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
TM
OPERATION
FUNCTIONAL DESCRIPTION
The MP2307 regulates input voltages from
4.75V to 23V down to an output voltage as low
as 0.925V, and supplies up to 3A of load
current.
The MP2307 uses current-mode control to
regulate the output voltage. The output voltage
is measured at FB through a resistive voltage
divider and amplified through the internal
transconductance error amplifier. The voltage at
the COMP pin is compared to the switch current
(measured internally) to control the output
voltage.
The
MOSFET switches to step-down the input
voltage to the regulated output voltage. Since
the high side MOSFET requires a gate voltage
greater than the input voltage, a boost capacitor
connected between SW and BS is needed to
drive the high side gate. The boost capacitor is
charged from the internal 5V rail when SW is low.
converter
uses
internal
N-Channel
When the FB pin voltage exceeds 20% of the
nominal regulation value of 0.925V, the over
voltage comparator is tripped and the COMP
pin and the SS pin are discharged to GND,
forcing the high-side switch off.
MP2307_BD01
LOCKOUT
COMPARATOR
INTERNAL
REGULATORS
IN
EN
+
ERROR
AMPLIFIER
1.2V
OVP
RAMP
CLK
0.925V
7V
0.3V
CURRENT
COMPARATOR
CURRENT
SENSE
AMPLIFIER
1.1V
SHUTDOWN
COMPARATOR
7
COMP
6
SS
8
FB
5
GND
4
OSCILLATOR
110/340KHz
S
R
Q
SW
3
BS
1
IN
5V
2
OVP
IN < 4.10V
EN OK
Zener
+
Q
+
+
1.5V
+
+
2.5V
+
+
--
--
--
--
--
--
--
Figure 1—Functional Block Diagram
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MP2307DN | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:3A, 23V, 340KHz Synchronous Rectified Step-Down Converter |
| MP2307DN-LF | 功能描述:開關變換器、穩(wěn)壓器與控制器 3A/23V Synch Step-Down Converter 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP2307DN-LF-Z | 功能描述:開關變換器、穩(wěn)壓器與控制器 3A/23V Synch Step-Down Converter 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 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP2308GD-P | 功能描述:直流/直流開關轉換器 4A/18V Synch Step-Down Reg RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| MP2308GD-Z | 功能描述:直流/直流開關轉換器 4A/18V Synch Step-Down Reg RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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