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 |
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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 |
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