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LTC1874EGN#PBF PDF预览

LTC1874EGN#PBF

更新时间: 2024-01-02 23:05:47
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
12页 183K
描述
LTC1874 - Dual Constant Frequency Current Mode Step-Down DC/DC Controller; Package: SSOP; Pins: 16; Temperature Range: -40°C to 85°C

LTC1874EGN#PBF 技术参数

是否Rohs认证: 符合生命周期:Transferred
零件包装代码:SSOP包装说明:SSOP, SSOP16,.25
针数:16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:7.56模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:CURRENT-MODE最大输入电压:9.8 V
最小输入电压:2.4 V标称输入电压:4.2 V
JESD-30 代码:R-PDSO-G16JESD-609代码:e3
长度:4.9 mm湿度敏感等级:1
功能数量:2端子数量:16
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:1 A封装主体材料:PLASTIC/EPOXY
封装代码:SSOP封装等效代码:SSOP16,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, SHRINK PITCH
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:1.75 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:SINGLE
最大切换频率:650 kHz技术:CMOS
温度等级:INDUSTRIAL端子面层:Matte Tin (Sn)
端子形式:GULL WING端子节距:0.635 mm
端子位置:DUAL处于峰值回流温度下的最长时间:30
宽度:3.9116 mmBase Number Matches:1

LTC1874EGN#PBF 数据手册

 浏览型号LTC1874EGN#PBF的Datasheet PDF文件第2页浏览型号LTC1874EGN#PBF的Datasheet PDF文件第3页浏览型号LTC1874EGN#PBF的Datasheet PDF文件第4页浏览型号LTC1874EGN#PBF的Datasheet PDF文件第5页浏览型号LTC1874EGN#PBF的Datasheet PDF文件第6页浏览型号LTC1874EGN#PBF的Datasheet PDF文件第7页 
LTC1874  
Dual Constant Frequency  
Current Mode Step-Down  
DC/DC Controller  
U
FEATURES  
DESCRIPTIO  
The LTC®1874 is a dual constant frequency current mode  
step-downDC/DCcontrollerwithexcellentACandDCload  
and line regulation. Each controller has an accurate  
undervoltage lockout that shuts down the individual con-  
troller when the input voltage falls below 2.0V.  
High Efficiency: Up to 94%  
High Output Currents Easily Achieved  
Wide VIN Range: 2.5V to 9.8V  
Constant Frequency 550kHz Operation  
Burst ModeTM Operation at Light Load  
Low Dropout: 100% Duty Cycle  
0.8V Reference Allows Low Output Voltages  
Current Mode Operation for Excellent  
Line and Load Transient Response  
Low Quiescent Current: 270µA (Each Controller)  
Separate Shutdown Pin for Each Controller  
Shutdown Mode Draws Only  
8µA Supply Current (Each Controller)  
±2.5% Reference Accuracy  
The LTC1874 boasts ±2.5% output voltage accuracy and  
consumes only 270µA of quiescent current per controller.  
The LTC1874 is configured with Burst Mode operation,  
which enhances efficiency at low output current for appli-  
cations where efficiency is a prime consideration.  
To further maximize the life of a battery source, each  
external P-channel MOSFET is turned on continuously in  
dropout(100%dutycycle). Inshutdown, eachcontroller  
draws a mere 8µA. High constant operating frequency of  
550kHz allows the use of small external inductors.  
Available in 16-Lead Narrow SSOP  
Each Controller Functions Independent of the Other  
U
The LTC1874 is available in a small footprint 16-lead  
narrow SSOP.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Mode is a trademark of Linear Technology Corporation.  
APPLICATIO S  
1- or 2-Cell Lithium-Ion-Powered Applications  
Personal Information Appliances  
Portable Computers  
Distributed 3.3V, 2.5V or 1.8V Power Systems  
U
TYPICAL APPLICATION  
V
IN  
3.5V  
TO 9.5V  
C
IN  
R1  
0.04  
R2  
10µF  
16V  
×2  
LTC1874  
0.04Ω  
1
2
8
V
PV  
IN2  
IN1  
7
L2  
4.7µH  
SENSE1  
GND1  
PGATE2  
PGND2  
M2  
V
1.8V  
1A  
OUT2  
3
6
L1  
M1  
4.7µH  
V
10k  
OUT1  
3.3V  
1A  
+
C2  
47µF  
6V  
4
5
D2  
V
FB1  
I
/RUN2  
TH  
10k  
+
13  
14  
15  
16  
12  
11  
10  
9
220pF  
C1  
D1  
I
TH  
/RUN1  
V
FB2  
47µF  
220pF  
C1, C2: SANYO POSCAP 6TPA47M  
6V  
PGND1  
GND2  
249k  
C
: TAIYO YUDEN CERAMIC  
IN  
EMK325BJ106MNT (×2)  
100k  
PGATE1 SENSE2  
D1, D2: MBRM120  
80.6k  
PV  
IN1  
V
IN2  
L1, L2: COILCRAFT D01608C-472  
M1, M2: Si3443DV  
R1, R2: DALE 0.25W  
80.6k  
1874 TA01  
Figure 1. LTC1874 3.5V-9.5V Input to 3.3V/1A and 1.8V/1A Dual Step-Down Converter  
1

LTC1874EGN#PBF 替代型号

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