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参数资料
| 型号： | LM3355MM-4.1/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | MSOP-8 |
| 文件页数： | 1/10页 |
| 文件大小： | 209K |
| 代理商： | LM3355MM-4.1/NOPB |
LM3355
Regulated 50mA Buck-Boost Switched Capacitor DC/DC
Converter
General Description
The LM3355 is a CMOS switched capacitor DC/DC con-
verter that produces a regulated output voltage by automati-
cally stepping up (boost) or stepping down (buck) the input
voltage. It accepts an input voltage between 2.5V and 5.5V.
The LM3355 is available with a standard output voltage of
4.1V (ideal for white LED applications). If other output volt-
age options between 1.8V and 4.1V are desired for other
applications, please contact your National Semiconductor
representative.
The LM3355’s proprietary buck-boost architecture enables
up to 50 mA of load current at an average efficiency greater
than 75%. Typical operating current is only 375 A and the
typical shutdown current is only 2.3 A.
The LM3355 is available in a 10-pin MSOP package. This
package has a maximum height of only 1.1 mm.
The high efficiency of the LM3355, low operating and shut-
down currents, small package size, and the small size of the
overall solution make this device ideal for battery powered,
portable, and hand-held applications.
See the LM3352 for up to 200mA of output current.
Features
n
Regulated V
OUT with ±3% accuracy
n
Standard output voltage of 4.1V
n
Custom output voltages available from 1.8V to 4.1V in
100 mV increments
n
2.5V to 5.5V input voltage
n
Up to 50 mA output current
n >
75% average efficiency
n
Uses few, low-cost external components
n
Very small solution size
n
375 A typical operating current
n
2.3 A typical shutdown current
n
1 MHz switching frequency (typical)
n
Architecture and control methods provide high load
current and good efficiency
n
MSOP-10 package
n
Over-temperature protection
Applications
n
White LED display backlights
n
1-cell Lilon battery-operated equipment including PDAs,
hand-held PCs, cellular phones
n
Flat panel displays
n
Hand-held instruments
n
NiCd, NiMH, or alkaline battery powered systems
Typical Operating Circuit
20021901
December 2001
LM3355
Regulated
50
mA
Buck-Boost
Switched
Capacitor
DC/DC
Converter
2004 National Semiconductor Corporation
DS200219
www.national.com
相关PDF资料 |
PDF描述 |
|---|---|
| LM3355MMX-4.1/NOPB | SWITCHED CAPACITOR REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM3361AMX | FM, AUDIO SINGLE CHIP RECEIVER, PDSO16 |
| LM3361AM | FM, AUDIO SINGLE CHIP RECEIVER, PDSO16 |
| LM336Z-2.5B | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.49 V, PBCY3 |
| LM3460M5X-1.5/NOPB | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.5 V, PDSO5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3355MMX-4.1 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Regulated 50mA Buck-Boost Switched Capacitor DC/DC Converter |
| LM335A | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Precision Temperature Sensors |
| LM335AD | 功能描述:板上安装温度传感器 Precision 1 Deg Cel RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| LM335ADT | 功能描述:板上安装温度传感器 Precision 1 Deg Cel RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| LM335AH | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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