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參數資料
| 型號： | MIC4721 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Quad UART with 16-byte FIFO and infrared (IrDA) encoder/decoder, SOT315-1 (LQFP80), Reel Dry Pack, SMD, 13",Turned |
| 中文描述： | 1.5A的2MHz的集成開關降壓穩壓器 |
| 文件頁數： | 1/19頁 |
| 文件大小： | 827K |
| 代理商： | MIC4721 |
MIC4721
1.5A 2MHz Integrated Switch
Buck Regulator
General Description
The Micrel MIC4721 is a high efficiency PWM buck (step-
down) regulators that provides up to 1.5A of output
current. The MIC4721 operates at 2MHz and has
proprietary internal compensation that allows a closed loop
bandwidth of over 200KHz.
The low on-resistance internal p-channel MOSFET of the
MIC4721 allows efficiencies up to 94%, reduces external
components count and eliminates the need for an
expensive current sense resistor.
The MIC4721 operates from 2.7V to 5.5V input and the
output can be adjusted down to 1V. The devices can
operate with a maximum duty cycle of 100% for use in low-
dropout conditions.
The MIC4721 is available in the 10-pin MSOP package
with a junction operating range from –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (
408
) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
May 2007
1
M9999-052907-A
Features
2.7 to 5.5V supply voltage
2MHz PWM mode
Output current to 1.5A
Up to 94% efficiency
100% maximum duty cycle
Adjustable output voltage option down to 1V
Ultra-fast transient response
Ultra-small external components
Stable with a 1μH inductor and a 4.7μF output capacitor
Fully integrated 1.5A MOSFET switch
Micropower shutdown
Power Good pin
Thermal shutdown and current limit protection
Pb-free 10-pin MSOP package
–40
°
C to +125
°
C junction temperature range
Applications
FPGA/DSP/ASIC applications
General point of load
Broadband communications
DVD/TV recorders
Point of sale
Printers/Scanners
Set top boxes
Computing peripherals
Video cards
___________________________________________________________________________________________________________
Typical Application
1.5A 2MHz Buck Regulator
76
78
80
82
84
86
88
90
92
94
0
0.2 0.4 0.6 0.8
OUTPUT CURRENT (A)
1.2 1.4 1.6
1.0
5V
IN
to 3.3V
O
Efficiency
相關PDF資料 |
PDF描述 |
|---|---|
| MIC4721YMM | Dual UART with 64-byte FIFO, SOT313-2 (LQFP48), Reel Pack, SMD, 13", Turned |
| MIC4722 | 3mm x 3mm 2.7MHz 3A PWM Buck Regulator |
| MIC4722YML | 3mm x 3mm 2.7MHz 3A PWM Buck Regulator |
| MIC4807 | 80V 8-Channel Addressable Low-Side Driver |
| MIC4807BN | 80V 8-Channel Addressable Low-Side Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MIC4721YMM | 功能描述:直流/直流開關調節器 1.5A 2MHz Buck Regulator RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC4721YMM TR | 功能描述:直流/直流開關調節器 1.5A 2MHz Buck Regulator RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC4721YMMTR | 功能描述:IC REG BUCK ADJ 1.5A 10MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關:52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| MIC4722 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3mm x 3mm 2.7MHz 3A PWM Buck Regulator |
| MIC4722_10 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3mm x 3mm 2.7MHz 3A PWM Buck Regulator |
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