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MIC23060-G4YMT PDF预览

MIC23060-G4YMT

更新时间: 2024-09-19 10:57:19
品牌 Logo 应用领域
麦瑞 - MICREL /
页数 文件大小 规格书
15页 733K
描述
Sequenced Power Management IC with HyperLight Load? DC/DC and Dual Input LDO?

MIC23060-G4YMT 数据手册

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MIC23060  
Sequenced Power Management IC with  
HyperLight Load™ DC/DC and  
Dual Input LDO™  
General Description  
Features  
The MIC23060 is a highly efficient power management IC  
integrating a high frequency DC/DC converter with  
HyperLight Load™ mode and a low input voltage capable  
LDO. The MIC23060 offers two output voltages at very  
high efficiency on both outputs while maintaining a low  
total system cost.  
2.7V to 5.5V supply voltage range  
Tiny 12-pin 2.5mm x 2.5mm Thin MLF® package  
Integrated sequencing  
– Dual Input LDO™ can turn-on prior to DC/DC  
converter and automatically switch to post regulation  
from the DC/DC converter after it starts  
– Power for LDO from input during start-up  
– Adjustable delay time between outputs  
Zero-current off mode  
Current-limit and thermal shutdown protection  
HyperLight Load™ DC/DC Converter  
Up to 600mA output current in PWM mode (shared  
between switcher and linear LDO regulator outputs)  
4MHz frequency in continuous PWM mode  
Tiny 2.2µH inductor, 4.7µF capacitor  
85% Efficiency at 1mA output current  
>90% peak efficiency  
Low output voltage ripple across all loads  
LDO Regulator  
Low Input voltage LDO regulator  
Stable with ceramic output capacitors  
Regulates from the output of the DC/DC converter  
300mA output current capability  
High Accuracy: ±3% over temperature  
High PSRR: greater than 60dB  
The MIC23060 also provides sequencing of the two  
outputs in every potential combination of turn-on and turn-  
off sequencing by connecting two pins either high or low,  
and using a single GPIO to enable and disable the device.  
The LDO is designed both to post regulate from the output  
of the DC/DC converter for high system efficiency, and/or  
power directly from the battery. For sequences where the  
LDO is enabled prior to the DC/DC output, the LDO is first  
powered by the input voltage (typically the battery source)  
and then after the DCDC soft start is complete, seamlessly  
transition LDO input power to draw from the output of the  
DC/DC converter for higher efficiency operation through  
post-regulation.  
The DC/DC converter in the MIC23060 is a HyperLight  
Load™ converter with very high efficiency at light load and  
at full operating current, maintaining high efficiency across  
all operating modes in portable electronics.  
The MIC23060 is a µCap design, operating with small  
ceramic output capacitors and tiny inductors for stability,  
reducing required board space and component cost and is  
available in the tiny 2.5mm x 2.5mm Thin MLF® package.  
Very low quiescent current: 16µA  
Data sheets and support documentation can be found on  
Micrel’s web site at www.micrel.com.  
Applications  
Mobile phones  
PDAs/pocket PCs  
Digital cameras/DSP power supply  
_______________________________________________________________________________________________________________________________________  
Typical Application  
S3  
X
0
S2  
0
0
S1  
0
Sequence  
ALL OFF  
EN DC-DC ON 1st / OFF 1st  
0
EN  
0
LDO ON 1st / OFF 1st  
EN DC-DC ON 1st / OFF 2nd  
1
0
1
X
EN  
1
0
1
LDO ON 1st / OFF 2nd  
ALL ON  
HyperLight Load and Dual Input LDO are trademarks of Micrel, Inc  
MLF and MicroLead frame 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  
M9999-042210-B  
April 2010  

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