升压转换器与LDO的比SEPIC的效率

换器， LDO稳压器提供了更好的电池寿命比传统的SEPIC设计工作时，从一个锂离子电池。 MAX1800多声道数码相机电源IC升压加为SEPIC设计的LDO的设计和1 MAX668说明了这一点。
Maxim > App Notes > AUTOMOTIVE POWER-SUPPLY CIRCUITS

Keywords: lithium-ion, SEPIC, buck-boost, step up/down, step-up/step-down, converters, DC-DC converter, Li Dec 01, 2000
+, lithium battery, power supply, MAX1800, MAX668, digital camera power IC, integrated circuits, DC-DC
boost converters

APPLICATION NOTE 471
Step-up Converter with LDO Beats SEPIC Efficiency

Abstract: A step-up converter followed by an LDO regulator offers better battery life than a classic SEPIC
design when operating from one lithium-ion cell. This is demonstrated with the MAX1800 multi-channel digital
camera power IC for the step-up plus LDO design and a MAX668 for the SEPIC design.


Additional Information:

q Quick View Data Sheet for the MAX668/MAX669
q Samples and Literature Order Form