STV8130AD datasheet(8/12 Pages) STMICROELECTRONICS

Part #	STV8130AD

Description	ADJUSTABLE AND 3.3 V DUAL VOLTAGE REGULATOR WITH DISABLE AND RESET FUNCTIONS

PDF	12 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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8 / 12 page

POWER DISSIPATION AND LAYOUT INDICATIONS

STV8130AD

8/12

POWER DISSIPATION AND LAYOUT INDICATIONS

The power is mainly dissipated by the two device buffers. It can be calculated by the equation:

P = (VIN1-VOUT1) x IOUT1 + (VIN2-VOUT2) x IOUT2

The following table lists the different RthJA values of these packages with or without a heat sink and

the corresponding maximum power dissipation assuming:

Maximum Ambient Temperature = 70° C

Maximum Junction Temperature = 140° C

Device

Heat Sink

RthJA in °C/W

PMAX in W

STV8130A

1.4

Yes

3.5

STV8130D

56 to 40

1.25 to 1.75

Yes

2.2

Figure 7: Thermal Resistance (Junction-to-Ambient) of DIP16 Package without Heat Sink

Figure 8: Metal plate mounted near the STV8130D

# for heat sinking

Copper area (cm²) (35 µm plus solder) Board is face-down

To optimize the thermal conductivity of the copper

layer and the exchanges with the air, the solder

must cover the maximum amount of this area.

Test Board with

“On Board” square heat sink area.

Top View

Bottom View

STV8130AD Datasheet(PDF) 8 Page - STMicroelectronics