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參數(shù)資料
| 型號： | EV2303DN-00A |
| 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)： | 7/14頁 |
| 文件大?。?/td> | 395K |
| 代理商： | EV2303DN-00A |
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
7
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
TM
OPERATION
MP2303_BD01
LOCKOUT
COMPARATOR
INTERNAL
REGULATORS
IN
EN
+
ERROR
AMPLIFIER
1.2V
OVP
RAMP
CLK
0.8V
0.3V
CURRENT
COMPARATOR
CURRENT
SENSE
AMPLIFIER
0.95V
SHUTDOWN
COMPARATOR
COMP
SS
FB
GND
OSCILLATOR
340KHz
S
R
Q
SW
BS
IN
5V
OVP
IN < 4.05V
EN OK
+
Q
+
+
1.5V
+
+
2.5V
+
+
--
--
--
--
--
--
--
Figure 1—Functional Block Diagram
The MP2303 is a synchronous rectified,
current-mode, step-down regulator. It regulates
input voltages from 4.75V to 28V down to an
output voltage as low as 0.8V, and supplies up
to 3A of load current.
The MP2303 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
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 MP2303 FB pin exceeds 20% of the
nominal regulation voltage of 0.8V, the over
voltage comparator is tripped; the COMP pin
and the SS pin are discharged to GND, forcing
the high-side switch off.
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相關(guān)代理商/技術(shù)參數(shù) |
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| EV2305DS-00A | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:2A, 23V Synchronous Rectified Step-Down Converter |
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| EV2309DS-00A | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:1A, 23V, 340KHz Synchronous Rectified Step-Down Converter |
| EV230PDR | 制造商:Schneider Electric 功能描述:O/D EV CHRG STATION PEDESTAL DUAL LVL 2/30 |
| EV2351DQ-00A | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:4.75V to 23V Input, 1.5A Output Step-Down DC/DC Converter |
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