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參數(shù)資料
| 型號： | MP2105 |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 1MHz, 800mA Synchronous Step-Down Converter |
| 中文描述： | 1MHz的，800mA的同步降壓轉換器 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大?。?/td> | 275K |
| 代理商： | MP2105 |
MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER
MP2105 Rev. 1.2
8/19/2005
www.MonolithicPower.com
5
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2005 MPS. All Rights Reserved.
TM
OPERATION
The MP2105 is a constant frequency current
mode PWM step-down converter. The MP2105
is optimized for low voltage, Li-Ion battery
powered applications where high efficiency and
small size are critical. The MP2105 uses an
external resistor divider to set the output
voltage from 0.6V to 6V. The device integrates
both a main switch and a synchronous rectifier,
which provides high efficiency and eliminates
an external Schottky diode. The MP2105 can
achieve 100% duty cycle. The duty cycle D of a
step-down converter is defined as:
%
100
V
V
%
100
f
T
D
IN
OUT
OSC
ON
×
×
×
=
where T
ON
is the main switch on time, and f
OSC
is the oscillator frequency (1MHz).
IN
EN
FB
GND
SW
+
+
--
PWMCMP
PWM
OSC
+
--
EAMP
ICS
SLOPE COMP
FEEDBACK
ERROR\
AMP
0.6V
EAO
CC
17pF
BIAS
&
VOLTAGE
REFERENCE
PWM
CONTROL
LOGIC
1.0MHz
OSCILLATOR
IAMP
10X
CURRENT
SENSE
AMP
DH
DL
+
--
MAIN
SWITCH
(PCH)
SYNCHRONOUS
RECTIFIER
(NCH)
MP2105_BD01
Figure 1—Functional Block Diagram
相關PDF資料 |
PDF描述 |
|---|---|
| MP2105DJ | 1MHz, 800mA Synchronous Step-Down Converter |
| MP2106 | 1.5A, 15V, 800KHz Synchronous Buck Converter |
| MP2106DK | 1.5A, 15V, 800KHz Synchronous Buck Converter |
| MP2106DQ | 1.5A, 15V, 800KHz Synchronous Buck Converter |
| MP2108DK | 2A, 6V, 720KHz Synchronous Buck Converter |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MP2105_06 | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:1MHz, 800mA Synchronous Step-Down Converter |
| MP2105DJ | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:800mA Synchronous Buck Step-Down Converter |
| MP2105DJ-LF-P | 功能描述:開關變換器、穩(wěn)壓器與控制器 0.8A/6V Synch Step-Down 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 |
| MP2105DJLFZ | 制造商:Monolithic Power Systems 功能描述: 制造商:MPS 功能描述: |
| MP2105DJ-LF-Z | 功能描述:開關變換器、穩(wěn)壓器與控制器 0.8A/6V Synch Step-Down 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 |
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