ADP3820

–8–

REV. A

6-Lead Plastic Surface Mount Package

RT-6 (SOT-23-6)

0.122 (3.10)

0.106 (2.70)

PIN 1

0.118 (3.00)

0.098 (2.50)

0.075 (1.90)

BSC

0.037 (0.95) BSC

1

3

4

5

6

2

0.071 (1.80)

0.059 (1.50)

0.009 (0.23)

0.003 (0.08)

0.022 (0.55)

0.014 (0.35)

10

0

0.020 (0.50)

0.010 (0.25)

0.006 (0.15)

0.000 (0.00)

0.051 (1.30)

0.035 (0.90)

SEATING

PLANE

0.057 (1.45)

0.035 (0.90)

8-Lead Narrow Body Package

SO-8

0.0098 (0.25)

0.0075 (0.19)

0.0500 (1.27)

0.0160 (0.41)

8

0

0.0196 (0.50)

0.0099 (0.25)

45

85

4

1

0.1968 (5.00)

0.1890 (4.80)

0.2440 (6.20)

0.2284 (5.80)

PIN 1

0.1574 (4.00)

0.1497 (3.80)

0.0500 (1.27)

BSC

0.0688 (1.75)

0.0532 (1.35)

SEATING

PLANE

0.0098 (0.25)

0.0040 (0.10)

0.0192 (0.49)

0.0138 (0.35)

PCB Layout Issues

For optimum voltage regulation, place the load as close as pos-

use dedicated PCB traces to connect the MOSFET’s drain to

the positive terminal and GND to the negative terminal of the

load to avoid voltage drops along the high current carrying PCB

traces.

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

If PCB layout is used as heatsink, adding many vias around the

power FET helps conduct more heat from the FET to the back-

plane of the PCB, thus reducing the maximum FET junction

temperature.