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LM26480 PDF预览

LM26480

更新时间: 2024-11-09 04:44:39
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器
页数 文件大小 规格书
30页 2394K
描述
Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear Regulators

LM26480 数据手册

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January 15, 2008  
LM26480  
Externally Programmable Dual High-Current Step-Down  
DC/DC and Dual Linear Regulators  
Linear Regulators (LDO)  
General Description  
VOUT of 1.0V–3.5V  
The LM26480 is a multi-functional Power Management Unit,  
±3% FB voltage accuracy  
optimized for low-power digital applications. This device inte-  
300 mA output current  
grates two highly efficient 1.5A step-down DC/DC converters  
and two 300 mA linear regulators. The LM26480 is offered in  
a tiny 4 x 4 x 0.8mm LLP-24 pin package.  
25 mV (typ) dropout  
Features  
Key Specifications  
Compatible with advanced applications processors and  
FPGAs  
Step-Down DC/DC Converter (Buck)  
2 LDOs for powering Internal processor functions and I/Os  
1.5A output current  
Precision internal reference  
VOUT from:  
Thermal overload protection  
Buck1 : 0.8V–2.0V @ 1.5A  
Buck2 : 1.0V–3.3V @ 1.5A  
Current overload protection  
24-lead 4 × 4 × 0.8mm LLP package  
Up to 96% efficiency  
External Power-On-Reset function for Buck1 and Buck2  
±3% FB voltage accuracy  
Undervoltage lock-out detector to monitor input supply  
voltage  
2 MHz PWM switching frequency  
PWM - PFM automatic mode change under low loads  
Automatic soft start  
Applications  
Core digital power  
Applications processors  
Peripheral I/O power  
Typical Application Circuit  
30040401  
© 2008 National Semiconductor Corporation  
300404  
www.national.com  

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