Creating the future of Automobiles
Automotive Regulator
Selection Guide
Automotive Regulator
Selection Guide
Ver.3.2
01
Automotive Regulator Selection Guide
Note: "Nano Pulse Control
™
"is a trademark or a registered trademark of ROHM Co., Ltd.
Note: "Quick Buck Booster
™
"is a trademark or a registered trademark of ROHM Co., Ltd.
T
owards a new era o
f
mobility under
g
oin
g
si
g
ni
fi
cant trans
f
ormatio
n
Typ
es and Features of Automotive Power
S
u
pp
l
y
I
C
s
Switching Regulators
A
utomotive Switching Regulator Lineup
T
echnical To
p
ics
f
or Primary Switchin
g
Re
g
ulator
s
T
echnolo
g
ies that Maximize the Features of Switchin
g
Re
g
ulators
P
rimary Switchin
g
Re
g
ulato
r
Product S
p
ecifications Tabl
e
T
echnical To
p
ics on
S
econdary Switchin
g
Re
g
ulators
S
econdary Switching Regulat
o
r
Product S
p
ecifications Table
INDEX
Automotive Regulator
Selection Guide
P.03
P.05
P.10
P.11
P.13
P.13
P.01
P.02
Comfort
Safety
The Environment
Connected
Autonomous
Shared & Service
Electric
In recent years the mobility sector has reached a period of major change with the increasing proliferation of EVs and autonomous driving
systems, driving the demand for automotive-grade semiconductors.
ROHM has consistently provided a stable supply of high quality products and solutions by leveraging an integrated development system and
industry-leading technologies cultivated since the company was established in 1958.
Even now, ROHM continues to develop products that minimize environmental impact in the mobility sector by taking advantage of proprietary
groundbreaking technologies such as Nano Pulse Control
™
and Quick Buck Booster
™
to decrease size while boosting efciency.
In addition, to meet the increasing requirements for functional safety, ROHM acquired certication under the international functional safety
standard ISO26262 for the development process. For this new era of mobility, ROHM will develop products that improve system safety and
meet customer needs through a broad lineup of automotive-grade products and solutions ranging from chip resistors to SiC.
Towards a new era of mobility
undergoing signicant transformation
02
Automotive Regulator Selection Guide
A
utomotive Primar
y
Linear Re
g
ulator Lineup
A
utomotive Primary Linear Re
g
ulator Family Dia
g
ram
A
utomotive Primary Linear Regulator Configuration Example
Technical To
p
ics
f
or Primary Linear Regulator
s
P
rimary Linear Re
g
ulator Product S
p
ecifications Table
A
utomotive Secondary Linear Regulator
L
ineu
p
A
utomotive Secondary Linear Re
g
ulato
r
Family Dia
g
ram
Technical To
p
ics for
S
econdary Linear Re
g
ulator
s
Secondary Linear Re
g
ulato
r
Product S
p
ecifications Table
A
utomotive Switchin
g
Re
g
ulator Packa
g
e List
A
utomotive Linear Re
g
ulator Packa
g
e List
Low Iq
Primary
Switching
Regulators
Secondary
Switching
Regulators
Primary
Linear
Regulators
Secondary
Linear
Regulators
Low Voltage Operation
High Accuracy Output
Compact・Large Current
Battery
Required
Characteristics
Enables not just buck but boost and
buck-boost operation as well
(Depends on the product)
Many external parts ⇒ Higher total costs
Good conversion efficiency
⇒ Less heat generation
PWM(width)/PFM(frequency)
⇒ High noise
Resistance divider
⇒ Low noise
Ideal for energy saving(high efficiency)
From low to high power
Meets low noise, low cost requirements
For low power applications
Easier configuration than DC/DC
Few external parts
⇒ Lower total costs
Poor conversion efficiency
⇒ More heat generation
Switching Regulators(DC/DC)
Features
Voltage Generation
Method
Applications
Linear Regulators(LDO)
■ Technologies that Maximize the Performance of Switching Regulators
■ Technologies Required for Power Supply ICs
Effective noise
countermeasures
Effective heat dissipation
countermeasures
Low Voltage Operation
Types and Features of Automotive Power Supply ICs
▶P.3-12 ▶P.3/13-14
▶P.15-24 ▶P.25-30
Noise Characteristics and Immunity ▶P.33/35
Heat Resistance and Thermal Characteristics
▶P.34-35
Low Iq
▶P.6/7/9/19/20 ▶P.6/8/9
Compact ・ Large Current
▶P.13/28
Linear Regulators
Low EMI
EMS Immunity
Low Thermal
Resistance
P.15
P.17
P.19
P.19
P.21
P.25
P.27
P.28
P.29
A
pproach to Hi
g
h Quality and Stable Supply
App
roach for Automotive-
G
rade Products
ROHM Manufacturing
P.37
P.39
Gu
i
de
t
o
R
O
HM’
s
W
ebs
it
e
R
OHM Grou
p
Locations
P.40
P.41
P.31
P.32
N
oise Characteristics and Immunit
y
H
eat Resistance and Thermal Characteristics
S
u
pp
ort S
y
stem for EMC
/
T
hermal Treatmen
t
P.33
P.34
P.35