參數(shù)資料
型號(hào): MIC4720YML
廠商: MICREL INC
元件分類: 穩(wěn)壓器
英文描述: 400 W Transient Voltage Suppressor, SOD123W (SOD2 FlatPower), Reel Pack, SMD
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): 1/21頁(yè)
文件大?。?/td> 914K
代理商: MIC4720YML
MIC4720
3mm x 3mm 2.0MHz 2A Integrated
Switch Buck Regulator
General Description
MLF and
Micro
LeadFrame are registered trademarks of Amkor Technology, Inc.
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
M9999-051707
The Micrel MIC4720 is a high efficiency PWM buck (step-
down) regulator that provides up to 2A of output current.
The MIC4720 operates at 2.0MHz and has proprietary
internal compensation that allows a closed loop bandwidth
of over 200KHz.
The low on-resistance internal p-channel MOSFET of the
MIC4720 allows efficiencies over 92%, reduces external
components count and eliminates the need for an
expensive current sense resistor.
The MIC4720 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 MIC4720 is available in the exposed pad 12-pin
3mm x 3mm MLF
and 10-pin ePad MSOP package with a
junction operating range from –40°C to +125°C.
Features
2.7 to 5.5V supply voltage
2.0MHz PWM mode
Output current to 2A
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 2A MOSFET switch
Micropower shutdown
Thermal shutdown and current limit protection
Pb-free 12-pin 3mm x 3mm MLF
package
–40
°
C to +125
°
C junction temperature range
Pb-free 10-pin ePad MSOP package
Applications
FPGA/DSP/ASIC applications
General point of load
Broadband communications
DVD/TV recorder
Point of Sale
Printers/Scanners
Set Top Boxes
Computing Peripherals
Video Cards
Typical Application
MIC4720
65
70
75
80
85
90
95
100
0
0
0
OUTPUT CURRENT (A)
0
0
1
1
1
1
1
2
E
MIC4720
3.3V
OUT
Efficiency
V
IN
= 5.5V
V
IN
= 4.5V
V
IN
= 5.0V
2A 2.0MHz Buck Regulator
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