SI-3050LUS View Datasheet(PDF) - Sanken Electric co.,ltd.

Part Name

Description

Manufacturer

SI-3050LUS

Surface-Mount, Low Current Consumption, Low Dropout Voltage Dropper Type

Sanken Electric co.,ltd. 

qSI-3000LUS Series

sBlock Diagram

VIN 1

3 VO

+

–

REF

TSD

2 GND

sStandard External Circuit

VIN

1

VO

3

CIN

+

VIN

2

GND

+

CO

CO: Output capacitor (10 µF or larger)

The SI-3000LUS series can be operated on the circuit

even if a low ESR ceramic capacitor is used as the

output capacitor.

CIN:Input capacitor (0.1 to 10 µF)

This capacitor is required in the case of an inductive

input line or long wiring.

sReference Data

Copper Laminate Area vs. Power Dissipation

Tj=100°C PWB size 40 × 40

1

Ta=25°C

0.9

Ta=40°C

0.8

Ta=60°C

Ta=85°C

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

10

100

1000

Copper Laminate Area (mm2)

• A monolithic IC is mounted. The inner frame stage is con-

nected to the GND pin (pin 2). Therefore, enlarging the

copper laminate area leading to the GND pin achieves a

heat radiation effect.

• How to calculate the junction temperature

Measure the temperature (TC) of the GND pin (pin 2) lead

section using a thermistor, etc. Substitute this value in the

following formula and calculate the junction temperature.

Tj=PD×θj–c+Tc (θj–c=5°C/W)

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