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| 型号： | MIC23051-CGYML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/13页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1V/1.8V 8MLF |
| 产品培训模块： | MIC23xxx HyperLight Load™ Regulators |
| 标准包装： | 1 |
| 系列： | HyperLight Load® |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1V，1.8V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 混合物 |
| 频率 - 开关： | 4MHz |
| 电流 - 输出： | 600mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VFDFN 裸露焊盘，8-MLF? |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-MLF?（2x2） |
| 产品目录页面： | 1094 (CN2011-ZH PDF) |
| 其它名称： | 576-3015-6 |
MIC23051
4MHz PWM Buck Regulator with
HyperLight Load? and Voltage Scaling
2mm MLF with a junction operating range from –40 ° C to
General Description
The Micrel MIC23051 is a high efficiency 600mA PWM
synchronous buck (step-down) regulator featuring
HyperLight Load?, a patented switching scheme that
offers best in class light load efficiency and transient
performance while providing very small external
components and low output ripple at all loads.
The MIC23051 has an output voltage scaling feature that
can toggles between two different voltage levels.
The MIC23051 also has a very low typical quiescent
current draw of 20μA and can achieve over 85% efficiency
even at 1mA. The device allows operation with a tiny
inductor ranging from 0.47μH to 2.2μH and uses a small
output capacitor that enables a sub-1mm height solution.
In contrast to traditional light load schemes HyperLight
Load? architecture does not need to trade off control
speed to obtain low standby currents and in doing so the
device only needs a small output capacitor to absorb the
load transient as the powered device goes from light load
to full load.
At higher loads the MIC23051 provides a constant
switching frequency of greater than 4MHz while providing
peak efficiencies greater than 93%.
The MIC23051 is available in fixed output voltage options
from 0.72V to 3.3V eliminating external feedback
components. The MIC23051 is available in an 8-pin 2mm x
?
+125 ° C.
Data sheets and support documentation can be found on
Features
? Input voltage: 2.7V to 5.5V HyperLight Load?
? 600mA output current
? Fixed output voltage from 0.72V to 3.3V
? Output voltage scaling option
? Ultra fast transient response
? 20μA typical quiescent current
? 4MHz in CCM PWM operation in normal mode
? 0.47μH to 2.2μH inductor
? Low voltage output ripple
– 25mVpp in HyperLight Load mode
– 3mV output voltage ripple in full PWM mode
? >93% efficiency
? ~85% at 1mA
? Micropower shutdown
? Available in 8-pin 2mm x 2mm MLF ?
? –40 ° C to +125 ° C junction temperature range
Applications
? Cellular phones
? Digital cameras
? Portable media players
? Wireless LAN cards
? WiFi/WiMax/WiBro modules
? USB Powered Devices
Micrel’s web site at: www.micrel.com.
____________________________________________________________________________________________________________
Typical Application
Efficiency V OUT = 1.8V
100
90
80
V IN = 2.7V
V IN = 3.6V
V IN = 3.3V
70
1
60
50
V OUT = 1.8V
L = 1μH
10 100 1000
OUTPUT CURRENT (mA)
HyperLight Load is a trademark of Micrel, Inc.
MLF and Micro LeadFrame are registered trademarks of Amkor Technology, Inc.
Protected by US Patent No. 7064531
Micrel Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
July 2009
M9999-070809-F
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