参数资料
型号: MIC4721YMMTR
厂商: Micrel Inc
文件页数: 1/19页
文件大小: 0K
描述: IC REG BUCK ADJ 1.5A 10MSOP
标准包装: 2,500
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 可调至 1V
输入电压: 2.7 V ~ 5.5 V
频率 - 开关: 2MHz
电流 - 输出: 1.5A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
包装: 带卷 (TR)
供应商设备封装: 10-MSOP
其它名称: MIC4721YMM TR
MIC4721
1.5A 2MHz Integrated Switch
Buck Regulator
General Description
Features
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
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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
Micrel’s web site at: www.micrel.com.
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
5V IN to 3.3V O Efficiency
94
92
90
88
86
84
82
80
1.5A 2MHz Buck Regulator
78
76
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
OUTPUT CURRENT (A)
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
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