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03W201A
System Regulator for Car Stereo
BA4908
Description
Dimension (Unit : mm)
BA4908 is a system regulator IC for car stereo.
This IC incorporates 1 channel of 5.6V output,
2 channels of 8.7V output and 2 channels of
high side switch.
29.8
±
0.2
24.0
±
0.1
4.
7
±
0
.2
1
12
Features
2.54
0.6
0.4
±
0.1
1.2
1) PNP output and low drop out type (Except AMP and ANT)
2) Built-in output current limit circuit to protect IC from
destruction by short
3) Built-in over-voltage protection circuit to deliver strong
design for surge input to BACK UP and Vcc
4) 12 pin power package perfect for space saving design
5) Built-in thermal protection circuit to protect IC from
thermal destruction
SIP-M12
Applications
Car stereo
Absolute Maximum Ratings (Ta=25úC)
Parameter
Symbol
Limits
Unit
Power supply voltage
Power dissipation
Vcc
Pd
Topr
Tstg
24
3000
V
*
mW
úC
úC
Operating temperature range
Storage temperature range
-30
-55
~
~
+
85
+
150
*
Derating : 27.2mW/úC for operation above Ta=25úC
Recommended Operating Conditions (Ta=25úC)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Recommended supply voltage
Operating voltage range
Vcc
10
13.2
16
V
Vcc
6.3
13.2
24
V
*
Electric characteristic is not guaranteed. (Especially at low input voltage)
Electrical characteristics (
Unless otherwise noted: Ta=25úC, Vcc=13.2V)
Parameter
Circuit current at standby
Symbol
Min.
Typ.
Max.
Unit
Conditions
I
ST
-
0.55
0.80
mA
STAN BY pin = 0V
Output voltage(VDD)1
Minimum I/O voltage difference
Output current capacity
V
O
1
5.30
5.60
5.90
V
I
O
1=80mA
D
V
O
13
I
O
1
-
100
0.3
200
0.7
-
V
I
O
1=80mA
mA
V
O
1
³
5.3V
Output voltage(COM)2
Minimum I/O voltage difference
Output current capacity
V
O
2
8.25
8.70
9.15
V
I
O
2=120mA
D
V
O
23
I
O
2
-
150
0.4
300
0.7
-
V
I
O
2=120mA
mA
V
O
2
³
8.25V
I/O voltage difference
(AMP)3
Output current capacity
D
V
O
31
-
1.0
1.5
V
I
O
3=400mA
V
O
3
³
11.7V
I
O
3
500
900
-
mA
I/O voltage difference
(ANT)4
Output current capacity
D
V
O
41
-
1.0
1.5
V
I
O
4=400mA
V
O
4
³
11.7V
I
O
4
500
900
-
mA
Output voltage(TUNER5.6)5
V
O
5
5.3
5.6
5.9
V
I
O
5=50mA
Minimum I/O voltage difference
D
V
O
53
I
O
5
-
150
0.4
300
0.7
-
V
I
O
5=120mA
Output current capacity
mA
V
O
5
³
5.3V
Output voltage(TUNER8.7)6
V
O
6
8.25
8.70
9.15
V
I
O
6=140mA
Minimum I/O voltage difference
D
V
O
63
I
O
6
-
250
0.4
500
0.7
-
V
I
O
6=200mA
Output current capacity
mA
V
O
6
³
8.25V
*
This product is not designed for protection against radioactive rays.
*
Output current capacity must be set below MINIMUM of the specification.
Block Diagram
Regulator
BA4908
1
2
3
4
5
6
7
8
9
10 11
12
N.C. TUNER
8.7
ANT SW
TUNER
5.6
SW
STB
V
DD
5.6V
AMP
Vcc
ANT COM
8.7V
TUNER
5.6
TUNER
8.7
GND
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
This datasheet has been downloaded from:
www.DatasheetCatalog.com
Datasheets for electronic components.
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