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LP3205-AB5F 参数 Datasheet PDF下载

LP3205-AB5F图片预览
型号: LP3205-AB5F
PDF下载: 下载PDF文件 查看货源
内容描述: 1.5MHZ , 800毫安,高效率同步PWM降压型DC / DC转换 [1.5MHZ,800mA,High Efficiency Synchronous PWM Step-Down DC/DC Convert]
分类和应用:
文件页数/大小: 10 页 / 354 K
品牌: POWER [ LOWPOWER SEMICONDUCTOR INC ]
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Preliminary
Datasheet
LP3205
1.5MHZ,800mA,High Efficiency Synchronous
PWM Step-Down DC/DC Convert
General Description
The LP3205 is a constant frequency, current mode,
PWM step-down converter. The device integrates a
main switch and a synchronous rectifier for high
efficiency. The 2.5V to 5.5V input voltage range makes
the LP3205 is ideally suited for portable electronic
devices that are powered from 1-cell Li-ion battery or
from other power sources within the range such as
cellular phones, PDAs and handy-terminals. Internal
synchronous rectifier with low RDS(ON) dramatically
reduces conduction loss at PWM mode. The internal
synchronous
switch
increases
efficiency
while
eliminate the need for an external Schottky diode.The
switching ripple is easily smoothed-out by small
package filtering elements due to a fixed operation
frequency of 1.5MHz. This along with small SOT-23-5
package provide small PCB area application. Other
features include soft start, lower internal reference
voltage with 2% accuracy, over temperature protection,
and over current protection。
◆ High Efficiency: 93%  
◆ 1.5MHz Fixed-Frequency PWM Operation
◆ Adjustable Output From 0.6V to VIN  
◆ 1.2V, 1.5V, 1.8V, 2.5V, 3.0Vand 3.3V Fixed
◆ 800mA Output Current, 1.1A Peak Current
◆ No Schottky Diode Required
◆ 95% Duty Cycle Low Dropout Operation
◆ Available in SOT23-5/TSOT23-5 Package  
◆ Short Circuit and Thermal Protection  
◆ Low than 1µA Shutdown Current
Features
Applications
Portable Media Players
Cellular and Smart mobile phone
PDA
DSC
Wireless Card
Pin Configurations
Ordering Information
LP3205 -
□ □ □ □
F: Pb-Free
Package Type
B5: SOT23-5
J5: SOT23-5
Output Voltage Type
A: Adjustable type
12: 1.2V
15: 1.5V
18: 1.8V
25: 2.5V
33: 3.3V
LP3205 – Ver. 1.0 Datasheet
Feb.-2007
Page 1 of 10
Marking Information
Please see website.