TLS810B1 datasheet(21/24 Pages) INFINEON

Part #	TLS810B1

Description	Ultra Low Quiescent Current Linear Voltage Regulator

PDF	24 Pages

Scroll/Zoom	100%

Manufacturer	INFINEON [Infineon Technologies AG]

Direct Link	http://www.infineon.com

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21 / 24 page

Data Sheet

Rev. 1.0 2015-11-02

TLS810B1LDV50

Application Information

Calculation of RthJA,max:

PD =(VI – VQ) x IQ + VI x Iq

= (13.5V – 5V) x 80 mA + 13.5 V x 0.016 mA

=0.68 W

RthJA,max =(Tj,max – Ta) / PD

= (150 °C – 105 °C) / 0.68 W

= 66.2 K/W

As a result, the PCB design must ensure a thermal resistance RthJA lower than 66.2 K/W. According to “Thermal

Resistance” on Page 9, at least 600 mm² heatsink area is needed on the FR4 1s0p PCB, or the FR4 2s2p board

can be used.

6.4

Reverse Polarity Protection

TLS810B1 is not self protected against reverse polarity faults. To protect the device against negative supply

voltage, an external reverse polarity diode is needed, as shown in Figure 5. The absolute maximum ratings of

the device as specified in “Absolute Maximum Ratings” on Page 7 must be kept.

6.5

Further Application Information

• For further information you may contact http://www.infineon.com/

TLS810B1 Datasheet(PDF) 21 Page - Infineon Technologies AG