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參數資料
| 型號： | MP2108 |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 2A, 6V, 740KHz Synchronous Buck Converter |
| 中文描述： | 第2A，6V的，740KHz同步降壓轉換器 |
| 文件頁數： | 3/12頁 |
| 文件大小： | 311K |
| 代理商： | MP2108 |
MP2108 – 2A, 6V, 740KHz SYNCHRONOUS BUCK CONVERTER
MP2108 Rev 1.1
10/2/2006
www.MonolithicPower.com
3
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
(continued)
V
IN
= 5.0V, T
A
= +25
°
C, unless otherwise noted.
Parameter
Oscillator
Switching Frequency
Maximum Duty Cycle
Minimum On Time
Error Amplifier
Voltage Gain
Transconductance
COMP Maximum Output Current
FB Regulation Voltage
FB Input Bias Current
Soft-Start
Soft-Start Current
Output Switch On-Resistance
Symbol Condition
Min
Typ
Max
Units
f
SW
D
MAX
T
ON
V
FB
= 0.7V
620
85
740
200
920
KHz
%
ns
A
VEA
G
EA
V
FB
I
FB
V
FB
= 0.9V
400
450
±40
895
–100
V/V
μA/V
μA
mV
nA
875
915
I
SS
2
μA
V
IN
= 5V
V
IN
= 3V
V
IN
= 5V
V
IN
= 3V
190
280
160
230
3.5
m
m
m
m
A
Switch On Resistance
Synchronous Rectifier On Resistance
Switch Current Limit (Source)
Synchronous Rectifier Current Limit
(Sink)
Thermal Shutdown
2.5
350
mA
160
°
C
PIN FUNCTIONS
Pin #
Name
Description
Power Switch Boost. BST powers the gate of the high-side N-Channel power MOSFET
switch. Connect a 10nF or greater capacitor between BST and LX.
Internal Power Input. VIN supplies the power to the MP2108 through the internal LDO
regulator. Bypass VIN to PGND with a 10μF or greater capacitor. Connect VIN to the input
source voltage.
Output Switching Node. LX is the source of the high-side N-Channel switch and the drain
of the low-side N-Channel switch. Connect the output LC filter between LX and the output.
Power Ground. PGND is the source of the N-Channel MOSFET synchronous rectifier.
Connect PGND to SGND as close to the MP2108 as possible.
Signal Ground.
Soft-Start Input. Place a capacitor from SS to SGND to set the soft-start period. The
MP2108 sources 2μA from SS to the soft-start capacitor at start-up. As the voltage at SS
rises, the feedback threshold voltage increases to limit inrush current at startup.
Feedback Input. FB is the inverting input of the internal error amplifier. Connect a resistive
voltage divider from the output voltage to FB to set the output voltage.
Compensation Node. COMP is the output of the error amplifier. Connect a series RC
network to compensate the regulation control loop.
Internal 2.4V Regulator Bypass. Connect a 10nF capacitor between VREF and SGND to
bypass the internal regulator. Do not apply any load to VREF.
On/Off Control Input. Drive RUN high to turn on the MP2108, drive RUN low to turn the
MP2108 off. For automatic startup, connect RUN to VIN via a 100k
pull-up resistor.
1
BST
2
VIN
3
LX
4
PGND
5
SGND
6
SS
7
FB
8
COMP
9
VREF
10
RUN
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MP2108_06 | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:2A, 6V, 740KHz Synchronous Buck Converter |
| MP2108DK | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:2A, 6V, 740KHz Synchronous Buck Converter |
| MP2108DK-LF-P | 功能描述:開關變換器、穩(wěn)壓器與控制器 2A, 6V, 720kHz Synchronous Buck 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 |
| MP2108DK-LF-Z | 功能描述:開關變換器、穩(wěn)壓器與控制器 2A, 6V, 720kHz Synchronous Buck 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 |
| MP2108DQ | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:2A, 6V, 740KHz Synchronous Buck Converter |
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