Datasheet > LS1205EFD33

LS1205EFD33

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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LS1205EFD33 数据手册

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 R_DS(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

Name

LS1205EV LS1205EF

Description

■ HDD and SSD Drives

■ Adapter Powered Devices

■ PC / Notebook

■ FAN Control

■ Networking

1, 2, 3

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

VCP

V_OUTClamping

VCP

VIN

Threshold

Typ

3.3V_OUT

3.3V_IN

OUT

C _IN1

10 μ F

C _IN2

0.1μ F

R _H

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

S S

VCP

ILIM

C _{S S}

100 nF

R _EN2

C _EN

0.1μ

VCP Option :

H for 5V_OUT

L for 3.3V_OUT

Open for 12 V_OUT

GND

R _L

R _ILIM

2.2KΩ

FAULT\

100 K

Current limit program pin. Program the current

limit by connecting a resister to ground.

ILIM

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 V_OUT

12 V_IN

OUT

C _IN1

10 μ F

C _IN2

0.1μ F

C _{O 2}

0.1μ

C _{O 1}

10 μ

Fau lt

100 KΩ

LS1205EF

FAULT

Fau lt Indicator

EN1

8, 9,10

OUT

GND

Power output pin.

Ground pin.

S S

C _{S S}

100 nF

ILIM

R _ILIM

10 KΩ

R _EN2

C _EN

0.1μ F

GND

2.2KΩ

Speciﬁcations are subject to change without notice.

Revised: GD. 09/20/22

12 3 4 5 6 7...10

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与LS1205EFD33相关器件

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LS1205EVD33	LITTELFUSE	获取价格	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
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