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| 型号： | LP3918TLX-I |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA25 |
| 封装： | 2.50 X 2.50 MM, MICRO, SMD-25 |
| 文件页数： | 1/30页 |
| 文件大小： | 1271K |
| 代理商： | LP3918TLX-I |
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August 2007
LP3918
Battery Charge Management and Regulator Unit
General Description
The LP3918 is a fully integrated charger and multi-regulator
unit designed for CDMA cellular phones. The LP3918 con-
tains a Li-Ion battery charger, 7 low noise low dropout (LDO)
voltage regulators and a high-speed serial interface to pro-
gram on/off conditions and output voltages of individual reg-
ulators, and also to read status information from the PMU.
The Li-Ion charger integrates a power FET, reverse current
blocking diode, sense resistor with current monitor output,
and requires only a few external components. Charging is
thermally regulated to obtain the most efficient charging rate
for a given ambient temperature.
LDO regulators provide high PSRR and low noise ideally suit-
ed for supplying power to both analog and digital loads.
Applications
■ CDMA Phone Handsets
■ Low Power Wireless Handsets
■ Handheld Information Appliances
■ Personal Media Players
■ Digital Cameras
Features
■ Fully integrated Li-Ion battery charger with thermal
regulation
■ USB Charge Mode.
■ 7 Low Noise LDO’s
2 x 300 mA
3 x 150 mA
2 x 80 mA
■ I2C compatible interface for controlling LDO outputs and
charger operation
■ Thermal shutdown
■ Under Voltage Lockout
■ 25-bump Thin micro-SMD package 2.5 x 2.5 mm
■ Options available on request, please contact sales office
for further information;
- Level detect on HF_PWR & PWR_ON
- LDO Charging mode
- Custom Default Settings on Charger, and LDO O/P's.
Key Specifications
■ 50mA to 950mA Programmable Charge Current
■ 3.0V to 5.5V Input Voltage Range
■ 200mV typ. Dropout Voltage on 300 mA LDO’s
■ 2% (typ) Output Voltage Accuracy on LDO’s
Simplified Functional Block Diagram
20211601
2007 National Semiconductor Corporation
202116
www.national.com
LP3918
Battery
Charge
Management
and
Regulator
Unit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LP3918TLX-L | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Battery Charge Management and Regulator Unit |
| LP3919 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:CDMA Power Management Unit |
| LP3919RL-A/NOPB | 功能描述:PMIC 解决方案 RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| LP3919RL-B/NOPB | 功能描述:PMIC 解决方案 RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| LP3919RL-C/NOPB | 功能描述:PMIC 解决方案 RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
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