Protection IC Datasheet

© 2024 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: GD. 03/22/24

LS1205ExD33 Series

18V, 5A eFuse with Programmable Current Limit and Output Voltage Clamp

Absolute Maximum Rating (Reference to GND)

Notes:

1. Stress exceeding those listed “Absolute Maximum Ratings” may damage the device.

2. ESD HBM testing per JESD22-A114F

Symbol

Value

Units

VIN, EN, VCP, FAULT\

-0.3 to +20

V

The other Pins

-0.3 to +6.5

V

ESD, Human Body Model (HBM)

±2000

V

Junction Temperature Range

-40 to +125

°C

Storage Temperature Range

-65 to +125

°C

Lead Temperature (Soldering 10s)

260

°C

Recommend Operating Conditions

Symbol

Value

Units

Input Voltage (V

IN)

+2.7 to +18

V

Junction Temperature Range

+125

°C

Notes: The device is not guaranteed to function outside of the recommended operating conditions.

Symbol

Value

Units

Maximum Power Dissipation (T

A=25°C )

1.89

W

Thermal Resistance (

θ

JA)

53

°C/W

Thermal Resistance (

θ

JC)

25

°C/W

Notes:

1. Measured on JESD51-7, 4-Layer PCB.

2. The maximum allowable power dissipation is a function of the maximum junction temperature T

J_MAX,

the junction to ambient thermal resistance

θ

JA, and the ambient temperature TA. The maximum allowable

continuous power dissipation at any ambient temperature is calculated by P

D_MAX= (TJ_MAX-TA)/θJA. Exceeding

the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into

thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage.

Thermal information

Soft -start

UVLO

Charge

Pump

IN

SS

EN

GND

or

Thermal

Detect

Current

Limit

VOUT

Clamping

Driver

OUT

ILIM

VCP

2µA

SWEN

Discharge

C ontrol

120Ω

Soft -start

UVLO

Charge

Pump

IN

SS

EN

GND

or

Thermal

Detect

Current Limit &

Short protection

VOUT Clamping

Driver

OUT

ILIM

FAULT\

2µA

SWEN

VCP

Discharge

control

120Ω

LS1205EV

LS1205EF

Functional Block Diagram