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參數(shù)資料
| 型號(hào)： | MIC2207YML |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3mmx3mm 2MHz 3A PWM Buck Regulator |
| 中文描述： | 11 A SWITCHING REGULATOR, 2200 kHz SWITCHING FREQ-MAX, DSO12 |
| 封裝： | 3 X 3 MM, LEAD FREE, MLF-12 |
| 文件頁(yè)數(shù)： | 10/21頁(yè) |
| 文件大?。?/td> | 780K |
| 代理商： | MIC2207YML |
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Micrel
MIC2207
Applications Information
The MIC2207 is a 3A PWM non-synchronous
buck regulator.
By switching an input voltage
supply, and filtering the switched voltage through an
Inductor and capacitor, a regulated DC voltage is
obtained. Figure 1 shows a simplified example of a
non-synchronous buck converter.
Figure 1.
For a non-synchronous buck converter, there are
two
modes
of
operation;
discontinuous. Continuous or discontinuous refer to
the inductor current. If current is continuously flowing
through the inductor throughout the switching cycle,
it is in continuous operation. If the inductor current
drops to zero during the off time, it is in
discontinuous operation. Critically continuous is the
point where any decrease in output current will
cause it to enter discontinuous operation. The
critically continuous load current can be calculated
as follows;
continuous
and
L
2
2MHz
V
V
V
IN
×
2
OUT
OUT
OUT
×
=
I
Continuous or discontinuous operation determines
how we calculate peak inductor current.
Continuous Operation
Figure 2 illustrates the switch voltage and inductor
current during continuous operation.
Figure 2. Continuous Operation
The output voltage is regulated by pulse width
modulating (PWM) the switch voltage to the average
required output voltage. The switching can be
broken up into two cycles; On and Off.
During the on-time,
the high side switch is turned
on, current flows from the input supply through the
inductor and to the output. The inductor current is
Figure 3. On-Time
charged at the rate;
(
V
)
L
V
OUT
IN
To determine the total on-time, or time at which the
inductor charges, the duty cycle needs to be
calculated. The duty cycle can be calculated as;
V
D
=
IN
OUT
V
and the On time is;
2MHz
D
T
ON
=
April 2005
10
M9999-040705
www.micrel.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2207YML TR | 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 3A 2MHz Integrated Switch Buck Regulator (Lead Free) RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC2207YML-EV | 功能描述:MIC2207 - DC/DC, Step Down 1, Non-Isolated Outputs Evaluation Board 制造商:microchip technology 系列:- 零件狀態(tài):有效 主要用途:DC/DC，步降 輸出和類型:1，非隔離 功率 - 輸出:- 電壓 - 輸出:1.8V 電流 - 輸出:3A 電壓 - 輸入:2.7 V ~ 5.5 V 穩(wěn)壓器拓?fù)?降壓 頻率 - 開(kāi)關(guān):2MHz 板類型:完全填充 所含物品:板 使用的 IC/零件:MIC2207 標(biāo)準(zhǔn)包裝:1 |
| MIC2207YMLTR | 制造商:Micrel 功能描述:DC-DC Converter Single Buck 2.7 - 5.5V |
| MIC2207YML-TR | 功能描述:Buck Switching Regulator IC Positive Adjustable 1V 1 Output 3A 12-VFDFN Exposed Pad, 12-MLF? 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 功能:降壓 輸出配置:正 拓?fù)?降壓 輸出類型:可調(diào)式 輸出數(shù):1 電壓 - 輸入（最小值）:2.7V 電壓 - 輸入（最大值）:5.5V 電壓 - 輸出（最小值/固定）:1V 電壓 - 輸出（最大值）:5.5V 電流 - 輸出:3A 頻率 - 開(kāi)關(guān):2MHz 同步整流器:無(wú) 工作溫度:-40°C ~ 125°C （TJ） 安裝類型:表面貼裝 封裝/外殼:12-VFDFN 裸焊盤，12-MLF? 供應(yīng)商器件封裝:12-MLF?（4x4） 標(biāo)準(zhǔn)包裝:1 |
| MIC2208 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3mmx3mm 1MHz 3A PWM Buck Regulator |
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