March 1998
Edition 1.0
DATA SHEET
Copyright
1998 by FUJITSU LIMITED
1
DESCRIPTION
This power supply IC incorporates a 4-channel series regulator and a battery
backup function. It is a multi-function power supply IC with an output control
function and momentary power-loss detection circuit, which are both
required for mobile telephones. It also incorporates a speaker amplifier and a
buzzer driver. Since it has a built-in power system suitable for mobile
telephones, it promises equipment downsizing.
FEATURES
Power consumption during standby
: 0.22 mW (typ.)
4-channel low-saturation voltage type : 6 W typ. for channels 1-3
series regulator
20 W typ. for channel 4
Battery backup function
Momentary power-loss and power-restoration functions
ON/OFF switch circuit with an operating error prevention function
BTL amplifier for driving the speaker
: Output power= 90 mW typ.
Buzzer driver to permit changing the sound volume : 200 mA max.
Power supply voltage drops are accurately detected.
Hysteresis is provided for detection voltage.
Watchdog timer stop function is provided (inhibit pin).
Watchdog monitoring time and reset time are set independently.
MB3829
System Power Supply IC for Mobile Telephone
48-PIN PLASTIC LQFP
(FPT-48P-M05)
This device contains circuitry to protect the inputs against
damage due to high static voltages or electric fields.
However, it is advised that normal precautions be taken to
avoid application of any voltage higher than maximum rated
voltages to this high impedance circuit.
MB3829
2
PIN ASSIGNMENT
(TOP VIEW)
(FPT-48P-M05)
OUT1 : 1
NC : 2
OUT4 : 3
SS : 4
VCC1 : 5
OUT2 : 6
CTL2 : 7
OUT3 : 8
CTL3 : 9
BATT1 : 10
GND2 :11
GND1 :12
36 : IN
35 : BP
34 : FB
33 : GND4
32 : GND3
31 : OUTB
30 : OUTA
29 : VCC4
28 : CLK
27 : IN1
26 : IN2
25 : IN3
CLR
:
13
CT2
:
14
CT3
:15
T
OUT
:
16
VREF
:
17
VCC3
:
18
VCC5
:
19
VO3
:
20
VO2
:
21
VO1
:
22
GND5
:
23
GND6
:
24
48
:
VCC2
47
:
OFF
46
:
ON2
45:
ON1
44:
CT1
43:
CTP
42:
CTW
41:
RESET
40:
CK
39:
INH
38:
CHOICE
37:
SB
Voltage monitoring section
Power Controller section
Speaker Amp section
Sunder section
MB3829
3
PIN DESCRIPTION
Description
Pin No.
Pin Symbol
Power supply
control section
Sounder section
OUT1
NC
OUT4
SS
VCC1
OUT2
CTL2
OUT3
CTL3
BATT1
GND2
GND1
CLR
CT2
CT3
TOUT
VREF
VCC3
VCC5
VO3
VO2
VO1
GND5
GND6
IN3
REG1 output pin (3.0 V)
Unconnected pin (open)
REG4 output pin (3.0 V)
VREF slow-start capacitance connection pin
Power supply pin for power supply control section
REG2 output pin (3.0 V)
REG2 control pin
In REG1 operating
H level: REG2 operation; L level: REG2 OFF
REG3 output pin (3.0 V)
REG3 control pin
In REG1 operating
H level: REG3 operation; L level: REG3 OFF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
I/O
O
-
O
-
-
O
I
O
I
-
-
-
I
-
-
O
O
-
-
O
O
O
-
-
I
Backup battery connection pin
Ground pin
Ground pin
Power supply pin for sounder section
Output 3 pin (open collector)
Output 2 pin (open collector)
Output 1 pin (open collector)
Ground pin
Ground pin
Reset pin for momentary power - loss detection and power -
restoration section
Pin for connecting momentary power - loss evaluation time
setup capacitor
Pin for connecting momentary power - loss evaluation time
setup capacitor and resistor
Pin for momentary power - loss detection and output (open drain)
Pin for reference voltage output
Power supply pin for momentary power - loss detection and
power - restoration section
Control input 3 pin (H level: VO3 operation)
(Continue)
MB3829
4
(Continued)
Description
Pin No.
Pin Symbol
Sounder section
Speaker amplifier
section
Voltage monitoring
section
Power supply
control section
IN2
IN1
CLK
VCC4
OUTA
OUTB
GND3
GND4
FB
BP
IN
SB
CHOICE
INH
CK
RESET
CTW
CTP
CT1
ON1
ON2
OFF
VCC2
Control input 2 pin (H level: Vo2 operation)
Control input 1 pin (H level: Vo1 operation)
Clock input pin
Power supply pin for speaker amplifier section
Output A pin
Output B pin
Ground pin
Ground pin
Inverted input pin
Bypass pin
Non-inverted input pin
Control input pin (H level: speaker amplifier operation)
Earphone selection control pin
Inhibit pin
Clock input pin
Reset output pin
Pin for watchdog timer monitoring time setup
Pin for power-on reset hold time setup
Pin for connecting ON time setup capacitor
ON1 pin
ON2 pin
OFF pin
Power supply pin for ON/OFF switch section
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
I/O
I
I
I
-
O
O
-
-
I
-
I
I
-
I
I
O
-
-
-
I
I
I
-
MB3829
5
BLOCK DIAGRAM
+ -
Refernce
V
oltage
Bias
generator
Control
-
+
ON/OFF
switch
REG1
REG2
REG3
REG4
Backup
section
momentary
power
-loss
detection
and
power
-restoration
section
Sound
driv-
er
W
atchdog
timer
48
44
45
46
47
4
17
37
35
36
34
30
32
33
38
43
41
39
42
40
27
26
25
28
19
23
24
5
3
10
18
16
13
15
14
22
21
20
12
1
1
1
7
6
9
8
29
31
VCC2
CT1
ON1
ON2
OFF
SS
VREF (1.26V)
SB
BP
IN
VCC4
FB
GND3
GND4
OUT
A
OUTB
CHOICE
CTP
RESET
INH
CTW
CK
IN1
IN2
IN3
CLK
VCC5
GND5
GND6
VCC1
OUT4 (3.0V)
BA
TTI
(3.18V)
VCC3
T
OUT
CLR
CT3
CT2
VO1
VO2
VO3
GND1
GND2
OUT1 (3.0V)
CTL2
OUT2 (3.0V)
CTL3
OUT3 (3.0V)
1K
Speaker
amp.
-
+
-
+
-
+
-
+
-
+
MB3793
-27A
Q
S
R
+ -
-
+
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