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參數(shù)資料
| 型號： | MP1522EQ |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 25V Step-Up Converter in a SOT23-5 Package |
| 中文描述： | SWITCHING REGULATOR, QCC6 |
| 封裝： | 3 X 3 MM, MO-229VEEA-2, QFN-6 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 207K |
| 代理商： | MP1522EQ |
MP1522 – 25V STEP-UP CONVERTER IN A SOT23-5 PACKAGE
MP1522 Rev. 1.9
12/9/2005
www.MonolithicPower.com
3
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2005 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin #
1
Name
SW
Description
Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the power
inductor and output rectifier to SW. SW can swing between GND and 25V.
Ground.
Feedback Input. Connect a resistive voltage divider from the output voltage to FB to set
the output voltage. The feedback regulation threshold is 1.23V.
Regulator On/Off Control Input. A high voltage at EN turns on the converter, and a low
voltage turns it off. When not used, connect EN to the input source for automatic startup. If
EN is driven over 6V, place a 100k
resistor in series with EN.
Internal Power Input. BIAS powers the internal circuitry. Connect BIAS to the output for
more enhancement on the internal MOSFET gate at low V
IN
. If the input source remains
above 3.0V, BIAS can be connected to the input source to reduce power consumption.
2
3
GND
FB
4
EN
5
BIAS
OPERATION
The MP1522 is a step-up converter that
operates from an input voltage as low as 2.7V
and generates an output voltage up to 25V. The
0.5
internal N-Channel MOSFET power switch
is driven with a variable frequency, constant-
peak-current
architecture
regulation and low operating current. The 550ns
minimum off-time is extended to 1.6μs during
for
improved
start-up to yield a smooth glitch free turn-on.
Start-up mode is activated at initial power-up or
when exiting the 1μA shutdown state. The
MP1522 features an internal regulator allowing
it to be powered from the output for improved
low-input voltage operation, or powered from
the
input
source
consumption due to quiescent current.
for
reduced
power
MP1522_BD01
CONTROL
LOGIC
OFF ON
REGULATOR
V
IN
L1
D1
C1
C4
INTERNAL
POWER
ERROR
AMP
1.23V
450mA
GND
(2)
EN
(4)
BIAS
(5)
FB
(3)
SW
(1)
R2
R1
C2
C3
R3
--
+
CURRENT--
+
V
OUT
GND
Figure 1—Functional Block Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MP1522ET | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:25V Step-Up Converter in a SOT23-5 Package |
| MP1522ET-LF-P | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 .3A Switch / 25Vout Step-Up 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(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 |
| MP1522ET-LF-Z | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 .3A Switch / 25Vout Step-Up 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(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 |
| MP1523 | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:Precision 6-Lamp White LED Driver |
| MP1523DT | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:Precision 6-Lamp White LED Driver |
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