LP3970 [NSC]
Power Management Unit for Advanced Application Processors; 电源管理单元用于高级应用处理器
| 型号： | LP3970 |
| 厂家： | 
National Semiconductor |
| 描述： | Power Management Unit for Advanced Application Processors |
| 文件： | 总2页 (文件大小：422K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ADVANCE INFORMATION
January 2005
LP3970
Power Management Unit for Advanced Application
Processors
General Description
Features
n Compatible with advanced applications processors
n Additional buck regulator for powering high current
peripheral devices
The LP3970 is a multi-function, programmable Power Man-
agement Unit, designed especially for advanced application
processors. The LP3970 has been optimized for low power
handheld applications PMU provides 11 low dropout, low
noise linear regulators, two DC/DC magnetic buck regula-
tors, a back-up battery charger and 4 GPO’s. A high speed
serial interface is included to program individual regulator
output voltages as well on/off control.
n 11 LDOs for powering Internal processor functions and
I/O’s
n Backup battery charger for Lithium and
Lithium-Manganese coin cell batteries
n Automatic switching to backup battery
n High speed serial interface for independent control of
device functions and settings
Key Specifications
Buck regulators
n Precision internal reference
n Thermal overload protection
n Current overload protection
n Programmable VOUT from 0.8 to 3.5 V
n Up to 95% Efficiency
n 48-lead 7x7x0.8 mm LLP package
n Software Programmable Low Noise LDO’s
n 600 mA output current
n +3% output voltage accuracy
LDO’s
Applications
n PDA phones
n Smart phones
n Personal Media Players
n Digital Cameras
n Programmable VOUT of 1.5-3.3 V
n +3% output voltage accuracy
n 100/150/300 mA output current
n 100 mV (typ) Dropout
Simplified Application Circuit
20137101
© 2005 National Semiconductor Corporation
DS201371
www.national.com
Notes
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
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2. A critical component is any component of a life support
device or system whose failure to perform can be reasonably
expected to cause the failure of the life support device or
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