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LTC1142HVCG PDF预览

LTC1142HVCG

更新时间： 2024-09-29 22:11:55
品牌 Logo 应用领域
凌特 - Linear 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管输出元件
页数 文件大小 规格书
20页 404K
描述
Dual High Efficiency Synchronous Step-Down Switching Regulators

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中文翻译

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LTC1142HVCG 技术参数

是否Rohs认证：不符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SSOP28,.3
针数：28Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.11Is Samacsys：N
其他特性：5 VOLT OUTPUT ALSO AVAILABLE模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：CONSTANT OFF TIME
最大输入电压：20 V最小输入电压：3.5 V
标称输入电压：10 VJESD-30 代码：R-PDSO-G28
JESD-609代码：e0长度：10.2 mm
湿度敏感等级：1功能数量：1
端子数量：28最高工作温度：70 °C
最低工作温度：最大输出电压：3.43 V
最小输出电压：3.23 V标称输出电压：3.3 V
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装等效代码：SSOP28,.3封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH峰值回流温度（摄氏度）：235
认证状态：Not Qualified座面最大高度：1.99 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：250 kHz
技术：CMOS温度等级：COMMERCIAL
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：20宽度：5.3 mm
Base Number Matches：1

LTC1142HVCG 数据手册

 浏览型号LTC1142HVCG的Datasheet PDF文件第2页浏览型号LTC1142HVCG的Datasheet PDF文件第3页浏览型号LTC1142HVCG的Datasheet PDF文件第4页浏览型号LTC1142HVCG的Datasheet PDF文件第5页浏览型号LTC1142HVCG的Datasheet PDF文件第6页浏览型号LTC1142HVCG的Datasheet PDF文件第7页 
LTC1142/LTC1142L/LTC1142HV  
Dual High Efficiency  
Synchronous Step-Down  
Switching Regulators  
U
DESCRIPTIO  
EATURE  
S
F
The LTC®1142/LTC1142L/LTC1142HV are dual synchro-  
nous step-down switching regulator controllers featuring  
automatic Burst ModeTM operation to maintain high efficien-  
cies at low output currents. The devices are composed of two  
separate regulator blocks, each driving a pair of external  
complementary power MOSFETs, at switching frequencies  
up to 250kHz, using a constant off-time current mode archi-  
tecture providing constant ripple current in the inductor.  
■
■
■
Dual Outputs: 3.3V and 5V or User Programmable  
Ultra-High Efficiency: Over 95% Possible  
Current Mode Operation for Excellent Line and Load  
Transient Response  
High Efficiency Maintained over 3 Decades of  
Output Current  
Low Standby Current at Light Loads: 160µA/Output  
Independent Micropower Shutdown: IQ < 40µA  
Wide VIN Range: 3.5V to 20V  
Very Low Dropout Operation: 100% Duty Cycle  
Synchronous FET Switching for High Efficiency  
Available in Standard 28-Pin SSOP  
■
■
■
■
■
■
■
The operating current level for both regulators is user pro-  
grammableviaanexternalcurrentsenseresistor. Wideinput  
supply range allows operation from 3.5V* to 18V (20V  
maximum).Constantoff-timearchitectureprovideslowdrop-  
out regulation limited only by the RDS(ON) of the external  
MOSFET and resistance of the inductor and current sense  
resistor.  
O U  
PPLICATI  
A
S
■
■
■
■
Notebook and Palmtop Computers  
Battery-Operated Digital Devices  
Portable Instruments  
The LTC1142 series is ideal for applications requiring dual  
output voltages with high conversion efficiencies over a wide  
load current range in a small amount of board space.  
DC Power Distribution Systems  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Modeis a trademark of Linear Technology Corporation.  
*For LTC1142L-ADJ only.  
U
O
TYPICAL APPLICATI  
V
IN  
5.2V TO 18V  
C
IN5  
C
+
+
IN3  
22µF  
25V  
× 2  
22µF  
25V  
× 2  
0.22µF  
0.22µF  
0V = NORMAL  
>1.5V = SHUTDOWN  
2
24  
16  
10  
P-CH  
P-CH  
Si9430DY  
Si9430DY  
V
SHUTDOWN 3  
V
IN5  
SHUTDOWN 5  
IN3  
23  
1
9
L2  
L1  
50µH  
R
R
SENSE5  
0.05Ω  
SENSE3  
PDRIVE 3  
PDRIVE 5  
50µH  
V
0.05Ω  
OUT3  
3.3V/2A  
V
OUT5  
5V/2A  
15  
+
+
SENSE  
SENSE  
3
SENSE  
SENSE  
5
5
LTC1142HV  
1000pF  
1000pF  
–
–
3
14  
20  
28  
6
D1  
1N5818  
D2  
NDRIVE 3  
PGND3 SGND3  
NDRIVE 5  
1N5818  
N-CH  
N-CH  
C
C
I
I
SGND5  
17  
PGND5  
18  
T5  
11  
T3  
25  
TH3  
27  
TH5  
13  
C
OUT5  
C
+
+
OUT3  
Si9410DY  
Si9410DY  
220µF  
4
3
220µF  
10V  
× 2  
10V  
× 2  
R
C5  
1k  
R
C3  
1k  
R
R
: SL-C1-1/2-1R050J  
SENSE3, SENSE5  
L1, L2: COILTRONICS CTX50-2-MP  
PINS 5, 7, 8, 19, 21, 22: NC  
C
C
C
C
T5  
T3  
C3  
C5  
560pF 3300pF 3300pF 390pF  
1142 F01  
NOTE: COMPONENTS OPTIMIZED FOR HIGHEST EFFICIENCY, NOT MINIMUM BOARD SPACE.  
Figure 1. High Efficiency Dual 3.3V, 5V  
1
1234567...20

中文翻译

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