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LTC1878EMS8#PBF

更新时间： 2024-01-14 11:03:22
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
16页 228K
描述
LTC1878 - High Efficiency Monolithic Synchronous Step-Down Regulator; Package: MSOP; Pins: 8; Temperature Range: -40°C to 85°C

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LTC1878EMS8#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：MSOP包装说明：TSSOP,
针数：8Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：6 V最小输入电压：2.65 V
标称输入电压：3.6 VJESD-30 代码：S-PDSO-G8
JESD-609代码：e3长度：3 mm
湿度敏感等级：1功能数量：1
端子数量：8最高工作温度：70 °C
最低工作温度：最大输出电流：1.5 A
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：SQUARE封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：250认证状态：Not Qualified
座面最大高度：1.1 mm表面贴装：YES
切换器配置：BUCK最大切换频率：605 kHz
技术：CMOS温度等级：COMMERCIAL
端子面层：Matte Tin (Sn)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：NOT SPECIFIED宽度：3 mm
Base Number Matches：1

LTC1878EMS8#PBF 数据手册

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Final Electrical Specifications  
LTC1878  
High Efficiency  
Monolithic Synchronous  
Step-Down Regulator  
May 2000  
U
FEATURES  
DESCRIPTIO  
The LTC®1878 is a high efficiency monolithic synchro-  
nous buck regulator using a constant frequency, current  
mode architecture. Supply current during operation is  
only 10µA and drops to < 1µA in shutdown. The 2.65V to  
6V input voltage range makes the LTC1878 ideally suited  
forsingleLi-Ionbattery-poweredapplications. 100%duty  
cycle provides low dropout operation, extending battery  
life in portable systems.  
■
High Efficiency: Up to 95%  
■
Very Low Quiescent Current: Only 10µA  
During Operation  
■
600mA Output Current at VIN = 3.3V  
■
2.65V to 6V Input Voltage Range  
■
550kHz Constant Frequency Operation  
Synchronizable from 400kHz to 700kHz  
Selectable Burst ModeTM Operation/  
Pulse Skipping Mode  
■
■
Switching frequency is internally set at 550kHz, allowing  
the use of small surface mount inductors and capacitors.  
For noise sensitive applications the LTC1878 can be  
externally synchronized from 400kHz to 700kHz. Burst  
Mode operation is inhibited during synchronization or  
when the SYNC/MODE pin is pulled low, preventing low  
frequency ripple from interfering with audio circuitry.  
■
■
■
■
■
■
No Schottky Diode Required  
Low Dropout Operation: 100% Duty Cycle  
0.8V Reference Allows Low Output Voltages  
Shutdown Mode Draws < 1µA Supply Current  
±2% Output Voltage Accuracy  
Current Mode Control for Excellent Line and  
Load Transient Response  
Overcurrent and Overtemperature Protected  
■
■
The internal synchronous switch increases efficiency and  
eliminates the need for an external Schottky diode. Low  
output voltages are easily supported with the 0.8V feed-  
back reference voltage. The LTC1878 is available in a  
space saving 8-lead MSOP package.  
Available in 8-LeUad MSOP Package  
APPLICATIO S  
■
Cellular Telephones  
■
Wireless Modems  
For higher input voltage (12V abs max) applications, refer  
to the LTC1877 data sheet.  
■
Personal Information Appliances  
■
Portable Instruments  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
■
Distributed Power Systems  
Burst Mode is a trademark of Linear Technology Corporation.  
■
Battery-Powered Equipment  
U
Efficiency vs Output Load Current  
TYPICAL APPLICATIO  
100  
V
= 3.6V  
= 4.2V  
95  
90  
85  
80  
75  
70  
IN  
High Efficiency Step-Down Converter  
10µH*  
V
†
IN  
7
6
1
2
5
V
OUT  
V
SYNC  
SW  
2.65V  
TO 6V  
IN  
3.3V  
20pF  
887k  
22µF**  
CER  
V
IN  
+
LTC1878  
47µF***  
V
= 6V  
RUN  
IN  
3
I
V
FB  
TH  
GND  
4
280k  
220pF  
Burst Mode OPERATION  
V
= 3.3V  
OUT  
1878 TA01  
L = 10µH  
*TOKO D62CB A920CY-100M  
0.1  
1
10  
100  
1000  
**TAIYO-YUDEN CERAMIC JMK325BJ226MM  
***SANYO POSCAP 6TPA47M  
OUTPUT CURRENT (mA)  
†V  
CONNECTED TO V FOR 2.65V < V < 3.3V  
1878 TA02  
OUT  
IN IN  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
1
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中文翻译

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LTC1878EMS8#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LTC1878EMS8 Linear

完全替代

 High Efficiency Monolithic Synchronous Step-Down Regulator
LTC1878EMS8#TRPBF Linear

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