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參數(shù)資料
| 型號： | MBRS240L |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 2A, 32V, 330KHz Step-Down Converter |
| 中文描述： | 第2A，32V的，330KHz降壓轉換器 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大小： | 261K |
| 代理商： | MBRS240L |
MP1591 – 2A, 32V, 330KHz STEP-DOWN CONVERTER
MP1591 Rev. 2.3
9/27/2006
www.MonolithicPower.com
4
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
OPERATION
The MP1591 is a current mode step-down
regulator. It regulates input voltages from 6.5V
to 32V down to an output voltage as low as
1.230V and is able to supply up to 2A of load
current.
The MP1591 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 error
amplifier.
The
output
transconductance error amplifier is presented at
COMP where a network compensates the
regulation control system.
current
of
the
The voltage at COMP is compared to the switch
current measured internally to control the output
voltage. The converter uses an internal
N-Channel MOSFET switch to step-down the
input voltage to the regulated output voltage.
Since the MOSFET requires a gate voltage
greater than the input voltage, a boost capacitor
connected between SW and BS drives the gate.
The capacitor is internally charged while SW is
low. An internal 10
switch from SW to GND is
used to insure that SW is pulled to GND when
the switch is off to fully charge the BS capacitor
LOCKOUT
COMPARATOR
ERROR
AMPLIFIER
FREQUENCY
FOLDBACK
COMPARATOR
INTERNAL
REGULATORS
1.8V
SLOPE
COMP
CLK
CURRENT
COMPARATOR
CURRENT
SENSE
AMPLIFIER
SHUTDOWN
COMPARATOR
COMP
IN
2
EN
7
5
6
GND
4
OSCILLATOR
THERMAL
PROTECTION
35/330KHz
S
R
Q
SW
BS
M1
M2
1
+
REF
5V
8
Q
1.2V
+
+
2.60V/
2.35V
+
1.230V
0.7V
+
+
FB
--
--
--
--
--
--
3
Figure 1—Functional Block Diagram
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| MBRS240LT3 | 功能描述:肖特基二極管與整流器 2A 40V Low Vf RoHS:否 制造商:Skyworks Solutions, Inc. 產品:Schottky Diodes 峰值反向電壓:2 V 正向連續(xù)電流:50 mA 最大浪涌電流: 配置:Crossover Quad 恢復時間: 正向電壓下降:370 mV 最大反向漏泄電流: 最大功率耗散:75 mW 工作溫度范圍:- 65 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-143 封裝:Reel |
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