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LS1205EVD33 PDF预览

LS1205EVD33

更新时间： 2024-11-21 14:56:55
品牌 Logo 应用领域
力特 - LITTELFUSE 开关电路保护
页数 文件大小 规格书
10页 1102K
描述
LS1205E集成负载开关为系统供电提供简单的电路保护。 这些器件使用很少的外部元件，提供多种保护模式。 它们是对过载、短路、输入电压浪涌和过大突入电流的强大防御。 开关的低RDS(ON)有助于减

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LS1205EVD33 数据手册

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Protection IC Datasheet  
LS1205ExD33 Series  
18V, 5A eFuse with Programmable Current Limit and Output Voltage Clamp  
RoHS Pb  
Description  
The LS1205E integrated load switch provides an easy circuit  
protection to power the system. The devices use few external  
components and provide multiple protection modes. They are a  
robust defense against overload, short circuit, input voltage surge  
and excessive inrush current. The switch’s low RDS(ON) helps to  
reduce power loss during normal operation. Set the current limit  
level with an external resistor. Protect against input over-voltage  
events via internal clamp circuitry to a safe output voltage.  
Programmable soft-start controls the slew rate of the output  
voltage to limit inrush current during plug in. It integrates thermal  
fold-back function and over temperature shutdown protection.  
They are available in low profile 10 leads DFN 3mm x 3mm  
package.  
Features & Benefits  
■ Wide Input Voltage Range  
■ External Programmable Soft-  
Pinout Designation  
from 2.7V to 18V  
StartTime  
■ LS1205EV: External  
Selectable Input Range and  
Clamping Output Voltage  
Threshold  
■ External Programmable  
Current Limit up to 5A  
■ Short-circuit Protection  
■ Enable Control Pin  
■ LS1205EF: Open Drain Fault  
Indicator FAULT\  
■ Thermal Shutdown Protection  
& Auto Recovery  
■ Output Discharging Function  
■ DFN3×3_10L Package  
■ Pb-Free RoHS compliant  
■ Integrate a 25mΩ Low  
RDS(ON) Protection Switch  
LS1205EV Top View  
LS1205EF Top View  
Pin Description  
Applications  
Pin  
Name  
LS1205EV LS1205EF  
Description  
■ HDD and SSD Drives  
■ Adapter Powered Devices  
■ PC / Notebook  
■ FAN Control  
■ Networking  
1, 2, 3  
1, 2, 3  
IN  
Power input pin.  
LS1205EV only output clamp voltage selection  
based on the input voltage.Pull VCP pin to High  
by connecting a resistor to IN or pull VCP pin  
to Low by connecting a resistor to ground, or  
float VCP Pin to select different output clamping  
thresholds. Recommend to decoupling this pin  
with 0.1µF capacitor.  
Typical Applications  
4
-
VCP  
VOUT Clamping  
VCP  
VIN  
Threshold  
Typ  
3.3VOUT  
3.3VIN  
IN  
OUT  
OUT  
OUT  
IN  
IN  
C IN1  
10 μ F  
C IN2  
0.1μ F  
R H  
NC  
C O 2  
0.1μ F  
C O 1  
10 μ F  
Low  
High 5V  
FLOAT 12V >16V 14.4V  
LS1205EF Only. Fault event indicator. Open-  
drain output that asserts low to indicate input  
under-voltage, input over-voltage, output short  
and thermal shutdown fault events.  
3.3V >4V 3.8V  
>6V 5.7V  
R EN1  
10K  
LS1205EV  
EN  
S S  
VCP  
ILIM  
C S S  
100 nF  
R EN2  
NC  
C EN  
0.1μ  
VCP Option :  
H for 5VOUT  
L for 3.3VOUT  
Open for 12 VOUT  
GND  
R L  
R ILIM  
2.2KΩ  
F
-
4
FAULT\  
100 K  
Current limit program pin. Program the current  
limit by connecting a resister to ground.  
5
6
5
6
ILIM  
SS  
Soft Start time program pin. Connect a capacitor  
to ground to program the soft start time.  
Enable interface pin. EN has accurate ON/OFF  
threshold of 1.29V and 1.19V respectively. Pull  
it above ON threshold to enable the IC. Pull it  
below OFF threshold to disable the IC.  
12 VOUT  
12 VIN  
IN  
IN  
IN  
OUT  
OUT  
OUT  
C IN1  
10 μ F  
C IN2  
0.1μ F  
C O 2  
0.1μ  
C O 1  
10 μ  
R
Fau lt  
F
F
100 KΩ  
7
7
EN  
LS1205EF  
FAULT  
\
Fau lt Indicator  
EN  
R
EN1  
8, 9,10  
EP  
8, 9,10  
EP  
OUT  
GND  
Power output pin.  
Ground pin.  
S S  
C S S  
100 nF  
ILIM  
R ILIM  
10 KΩ  
R EN2  
NC  
C EN  
0.1μ F  
GND  
2.2KΩ  
© 2022 Littelfuse, Inc.  
Specifications are subject to change without notice.  
Revised: GD. 09/20/22  
1234567...10

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