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AAT2503_08 参数 Datasheet PDF下载

AAT2503_08图片预览
型号: AAT2503_08
PDF下载: 下载PDF文件 查看货源
内容描述: 可调节的3通道稳压器 [Adjustable 3-Channel Regulator]
分类和应用: 稳压器
文件页数/大小: 22 页 / 863 K
品牌: ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
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PRODUCT DATASHEET  
AAT2503178  
SystemPowerTM  
Adjustable 3-Channel Regulator  
Functional Block Diagram  
FB  
VIN  
VP  
Voltage  
Reference  
DH  
Err.  
Amp.  
LX  
MODE/SYNC  
Logic  
Control  
Logic  
DL  
PGND  
OUTA  
EN  
VLDOA  
ENB  
VLDOB  
ENA  
Err.  
Amp.  
Voltage  
Reference  
FBA  
POK  
90%  
VREF  
OUTB  
FBB  
AGND  
Switch-Mode Step-Down Converter  
Functional Description  
The switching regulator is a monolithic step-down con-  
verter operating with input voltage range of 2.7V to 5.5V.  
Power devices are sized for 800mA current capability and  
achieve over 95% efficiency. PFM operation maintains  
high efficiency under light load conditions (typically  
<50mA). The MODE/SYNC pin allows an optional “PWM  
Only” mode. This maintains constant frequency and low  
output ripple across all load conditions. Alternatively, the  
IC can be synchronized to an external clock via the  
MODE/SYNC input. External synchronization is main-  
The AAT2503 is a high performance power management  
IC comprised of a step-down converter and two linear  
regulators. The step-down converter operates in both  
fixed and variable frequency modes for high efficiency  
performance. The switching frequency is 2MHz, minimiz-  
ing the size of the inductor. The converter requires only  
three external components (CIN, COUT, and L). The LDOs  
can deliver up to 150mA each. Each regulator has inde-  
pendent input voltage and enable pins and operates with  
ceramic capacitors.  
w w w . a n a l o g i c t e c h . c o m  
12  
2503.2008.02.1.4