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2010-3-2 16:34
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电源管理单元PMU 电源管理单元是一种高低集成的、针对便携式应用的电源管理方案,即将传统分立的若干类电源管理器件整合在单个的封装之内,这样可实现更高的电源转换效率和更低功耗,及更少的组件数以适应缩小的板级空间。目前在该市场有TI、Philips Semiconductor、National Semiconductor和ST Microelectronics分别推出自己的产品,还有后起之秀美国微源半导体LowPowerSemi LPS。 例如 美国微源半导体的LP78085,LP78081 PMU 多通道电源管理单元 Part No. Vin(V) Special Features Output Current (Max)(mA) Shutdown Quiescent Current (uA) Switching Frequency (max) Hz Efficiency (%) Output Voltage (max)(V) Packages Application Pin to Pin compatible LP78085 2.7-5.5 Channel1: Charger 600 Yes 150 1.5M Linear 4.2 QFN-24 4*4mm PMP,BT,DV TV/MP/ Game LTC3455 Channel2/3: Buck DC/DC Converters 600*2 Yes 95% 0.6 - 5.0 Channel4: Linear Regulator 300 Yes Channel5: Large LDO Control for Host 1500 Yes 1.8,2.5,3.0,3.3 Channel6: Low Battery Detector _ _ LP78084 2.7-5.5 Channel1: Li-ion Charger 800 Yes 150 Linear 4.2 TDFN-16 3*4mm PMP,BT,DV TV/MP/ Game AAT2554 Channel2: Buck DC/DC Converters 800 Yes 1.5M 95% 0.6 - 5.0 Channel3: Linear Regulator 300 Yes 1.8,2.5,3.0,3.3 LP78082 2.7-6.0 Channel1: Buck DC/DC Converters 600 Yes 120 1.5M 95% 0.6 - 5.0 DFN10 3*3mm Module,DV Toys Channel2:Linear Regulator 350 3.0,3.3 Channel3: Linear Regulator 350 3.0,3.3 LP78083 2.7-6.0 Channel1: Buck DC/DC Converters 600 Yes 120 1.5M 95% 0.6 - 5.0 DFN-8 2*2mm Module,DV Toys Channel2:Linear Regulator 300 3.0,3.3 Channel3: Linear Regulator 300 3.0,3.3 LP78081 2.7-6.0 Channel1: Buck DC/DC Converters 600 Yes 120 1.5M 95% 0.6 - 5.0 SOT23-6 Toys,TV,MP Channel2:Linear Regulator 300 3.0,3.3