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LM2854MH-1000 PDF预览

LM2854MH-1000

更新时间: 2024-11-08 03:02:03
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器
页数 文件大小 规格书
22页 536K
描述
4A 500 kHz / 1 MHz PowerWise㈢ Synchronous SIMPLE SWITCHER㈢ Buck Regulator

LM2854MH-1000 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:TSSOP-16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.77模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:5.5 V最小输入电压:2.95 V
标称输入电压:5 VJESD-30 代码:R-PDSO-G16
JESD-609代码:e0长度:5 mm
湿度敏感等级:1功能数量:1
端子数量:16最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:6.7 A
封装主体材料:PLASTIC/EPOXY封装代码:HSSOP
封装等效代码:TSSOP16,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, HEAT SINK/SLUG, SHRINK PITCH峰值回流温度(摄氏度):260
认证状态:Not Qualified子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:BUCK
最大切换频率:1160 kHz温度等级:AUTOMOTIVE
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:0.65 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:4.4 mm

LM2854MH-1000 数据手册

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April 2, 2008  
LM2854  
4A 500 kHz / 1 MHz PowerWise® Synchronous SIMPLE  
SWITCHER® Buck Regulator  
General Description  
Features  
The LM2854 PowerWise® SIMPLE SWITCHER® buck regu-  
lator is a 500 kHz or 1 MHz step-down switching voltage  
regulator capable of driving up to a 4A load with exceptional  
power conversion efficiency, line and load regulation, and  
output accuracy. The LM2854 can accept an input voltage rail  
between 2.95V and 5.5V and deliver an adjustable and highly  
accurate output voltage as low as 0.8V. Externally estab-  
lished soft-start with a small capacitor facilitates controlled  
start-up, and the LM2854 is capable of starting gracefully into  
a pre-biased output voltage. Partial internal compensation re-  
duces the number of external passive components and PC  
board space typically necessary in a voltage mode buck con-  
verter application, yet preserving flexibility to deal with ce-  
ramic and/or electrolytic based load capacitors. Lossless  
cycle-by-cycle peak current limit is used to protect the load  
from an overcurrent or short-circuit fault, and an enable com-  
parator simplifies sequencing applications. The LM2854 is  
available in an exposed pad TSSOP-16 package that en-  
hances the thermal performance of the regulator.  
Input voltage range of 2.95V to 5.5V  
Maximum load current of 4A  
Wide bandwidth voltage mode control loop, partial internal  
compensation  
Fixed switching frequency of 500 kHz or 1 MHz  
35 mintegrated MOSFET switches  
Adjustable output voltage down to 0.8V  
Optimized reference voltage initial accuracy and  
temperature drift  
External soft-start control with tracking capability  
Enable pin with hysteresis  
Low standby current of 230 µA  
Pre-biased load startup capability  
Integrated UVLO, OCP and thermal shutdown  
100% duty cycle capability  
eTSSOP-16 exposed pad package  
Applications  
Low Voltage POL Regulation from 5V or 3.3V Rail  
Local Solution for FPGA/DSP/ASIC/µP Core or I/O Power  
Broadband Networking and Communications  
Infrastructure  
Portable Computing  
Typical Application Circuit  
30052801  
SIMPLE SWITCHER® is a Registered Trademark of National Semiconductor Corporation.  
© 2008 National Semiconductor Corporation  
300528  
www.national.com  

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