LP3917RL-QL [NSC]
CDMA Cellular Phone Power Management Unit; CDMA手机的电源管理单元
| 型号： | LP3917RL-QL |
| 厂家： | 
National Semiconductor |
| 描述： | CDMA Cellular Phone Power Management Unit |
| 文件： | 总6页 (文件大小：181K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
December 2006
LP3917
CDMA Cellular Phone Power Management Unit
General Description
Features
LP3917 is a complete Power Management Unit designed for
CDMA cellular phones. LP3917 PMU contains 9 low noise low
dropout voltage regulators, 2 buck regulators, an USB
Transceiver, two comparators and a high speed serial inter-
face to program on/off conditions and output voltages of
individual regulators, and to read status information of the
PMU.
Two high efficiency Synchronous Magnetic Buck
Regulators, IOUT 800 mA and 600 mA
High efficiency PFM mode @ low IOUT
Auto Mode PFM/PWM switch
■
Low inductance 2.2 uH @ 2 MHz clock
■
■
9 Low Noise LDO's
3 x 300 mA
Buck regulators have an automatic switch to PFM mode at
low load conditions allowing very good efficiency also at low
output currents.
5 x 150 mA
1 x 80 mA
SW controllable LDO outputs
■
■
■
■
■
■
■
LDO regulators provide very low noise, 35 uV typ, ideally suit-
ed for supplying voltage to RF section.
USB 2.0 compatible Transceiver (12 Mbps)
Thermal Shutdown with Early Warning Alarm
Very low Sleep mode current
Two comparators can be used for detecting external acces-
sories like ear plug etc.
Battery Voltage Monitor output
LP3917 can use interrupt for alerting BB processor of status
changes instead of using inefficient status polling.
Interrupt Request for reducing SW polling
Ultra small 3.5x3.5 mm Micro SMDxt 49 bump package
Key Specifications
Applications
3.0V to 5.5V Input Voltage Range
■
CDMA Handsets
170 mV typ Dropout Voltage on LDO's @ 300 mA
2% (typ) Output Voltage accuracy on LDO's
35 µV noise on LDO's
■
■
■
■
■
Please contact NSC Sales for a full datasheet for the device.
800/600 mA Buck regulators with 3% (typ)
Accuracy and up to 90% efficiency
System Diagram
20176201
© 2006 National Semiconductor Corporation
201762
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Typical Application Diagram
20176202
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2
Device Pin Diagram
20176203
TOP VIEW
Package Marking Information
20176204
Ordering Information
HF_PWR
trigger
LK
Option
Package
Marking
Startup
Part Number
LP3917RL-S
Supplied As
NSC Drawing
250 units tape and reel
1000 units tape and reel
250 units tape and reel
1000 units tape and reel
250 units tape and reel
1000 units tape and reel
250 units tape and reel
1000 units tape and reel
250 units tape and reel
1000 units tape and reel
250 units tape and reel
1000 units tape and reel
Sequential
Edge
Edge
Level
Level
Level
Level
No
No
V01
LP3917RLX-S
LP3917RL-M
LP3917RLX-M
LP3917RL-Q
LP3917RLX-Q
LP3917RL-QL
LP3917RLX-QL
LP3917RL-N
Non-Sequential
Sequential
V05
V04
V06
V03
V07
No
RLA49
Sequential
Yes
No
Non-Sequential
Non-Sequential
LP3917RLX-N
LP3917RL-NL
LP3917RLX-NL
Yes
3
www.national.com
Physical Dimensions inches (millimeters) unless otherwise noted
Micro SMDxt 49 Package
NS Package Number MKT-RLA49AAA
X1 = 3.465mm ± 0.030mm
X2 = 3.465mm ± 0.030mm
X3 = 0.650mm ± 0.075mm
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4
Notes
5
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Notes
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