R-IN32M4-CL3 User's Manual: Board design edition
7. 2.5-V built-in Regulator Peripheral Circuit Configuration
R18UZ0074EJ0100
Page 25 of 61
Dec 24, 2019
7.7
Requirements for Parasitic Resistances and Parasitic Inductances in PCB
In this PCB layout, draw patterns so that the parasitic resistances and the parasitic inductances satisfy the followings.
Table 7.5 Requirements for Parasitic Resistances and Parasitic Inductances in PCB
Ball
(23 mm Square
BGA Package)
Ball
(17 mm Square
BGA Package)
Pin Name
Parasitic
Resistance
Parasitic
Inductance
G6
D1
AVDDREG_33
≤ 40 mΩ
≤ 4 nH
From ball to C
IN
E4, E5
D2, D3
AGND
≤ 40 mΩ
≤ 4 nH
From ball to C
IN
F4
C2
REG_OUT
≤ 40 mΩ
—
From ball to inductor (L)
H4
H4
REG_FB
≤ 400 mΩ
≤ 15 nH
From ball to the connection point of the
inductor (L) and C
OUT