Dropper Type System Regulator ICs SI-3322S
Features
High accuracy output of 5V±30mV
Memory backup power supply 4V±0.2V
Power on reset function
Supply voltage monitor function
Watch dog timer
CR not required for setting external time constant
External Dimensions
(unit: mm)
Index area
SI-3322S
Lot
SKA
Lot
7.40 10.00
7.60 10.65
1
2
3
0.25
• 45°
0.75
Adhesive surface
10.10
10.50
2.35
2.65
0.23
0.32
Absolute Maximum Ratings
Parameter
Symbol
V
IN
(1)
Terminal voltage
V
IN
(2)
V
SC
, NMI, RESET, OUTE
W/D, STBY
Storage temperature
Operating temperature
Power dissipation
Tstg
Top
P
D
–40 to +125
–40 to +105
1.4
°C
°C
W
Ta = 25°C
IG. SW
47µF
+
R2
0.33
0.51
0.10
0.30
0° to 8°
0.40
1.27
Applicable terminals
BAI, V
CC
, V
NMIC
V
S
, NMIC, RSTTC, OUTE
Ratings
–0.3 to 32
Unit
V
Conditions
1.27 BSC
Coplanarity
(height difference among leads)
0.1mm max.
–0.3 to 7
V
Standard Connection Diagram
+
R1
47µF
A/D converter,
I/O circuit, etc.
120Ω
4
V
B
3
2
V
S
V
SC
NMI
STBY
RESET
9
+
68µF
V
CC
NMI
STBY
RESET
AV
CC
Electrical Characteristics
Ratings
Parameter
V
SC
output voltage
V
S
output voltage
V
S
–V
SC
voltage difference
BAI input current
V
CC
input current
V
B
input current
V
S
input current
NMIC input current
W/D input current
RSTTC input current
Lo
NMI judge voltage
Hysteresis
Hi
NMI output voltage
Lo
Hi
STBY output voltage
Lo
Hi
RESET output voltage
Lo
Hi
OUTE output voltage
Lo
Hi
OUTE output voltage
Lo
Standby release time
Reset release time
Reset cycle
Reset period
W/D signal stop detect period
Reset signal output time
Standby signal output time
W/D fail judge frequency
Out enable release time
V
TOL
T
ST
T
RE
T
RC
T
RP
T
WS
T
NR
T
RS
F
FH
T
WE
5
60
40
20
10
80
10
2
40
50
5
10
10
75
50
25
12.5
0.6
20
90
60
30
15
V
ms
ms
ms
ms
ms
µs
µs
kHz
ms
V
UOL
V
TOH
V
S
–0.5
0.6
V
V
V
ROL
V
UOH
V
S
–0.5
0.6
V
V
V
SOL
V
ROH
V
S
–0.5
0.6
V
V
V
NOL
V
SOH
V
S
–0.5
0.6
V
V
6
5
V
NMIC
V
CC
1
BAI
+
(Ta = 25°C unless otherwise specified)
BATT
47µF
8
GND
SI-3322S
15
12
Micro-
computer
Symbol
V
SC
V
S
∆V
S
I
BAI
I
CC
I
B
I
S
I
NMIC
I
W/D
I
RTC
V
NIL
∆V
N
V
NOH
min
3.8
4.97
typ
4
5
max
4.2
5.03
0.3
0.6
5
25
20
Unit
V
V
V
mA
mA
mA
mA
mA
mA
mA
V
V
V
Conditions
BAI = 4.2 to 16V, I
SC
= –0.2mA
V
CC
= 5.2 to 16V, I
O
= –350mA
V
CC
= 5.2V, I
SC
= –50mA
BAI = 4.9 to 16V, I
SC
= –0.2mA
V
CC
= 3 to 16V
V
CC
= 3 to 16V
V
CC
= BAI = 3 to 16V, I
SC
= 0mA
V
CC
= BAI = 14V
V
CC
= BAI = 14V
V
CC
= BAI = 14V
NMIC = 0V
V
NMIC
6
NMIC OUTE OUTE W/D RSTTC
W/D NMI Control GND
13
11
10
16
14
OPEN or GND
Logic circuit
R1, R2: NMI judge voltage (5V typ) variable resistor
NMI judge voltage (R1 + R2) • 2.5V/R2
R1, R2 2k
Normally, VNMIC terminal is open.
RSTTC: Normally open.
GND connected when TRE
is to be halved.
–0.04
–0.04
–0.04
4.9
0.12
V
S
–0.5
–0.1
–0.1
–0.1
5
–0.4
–0.4
–0.4
5.1
0.3
Circuit Block Diagram
+
V
CC
5
V
B
4
Start
circuit
+
Current
limit circuit
V
S
3
+
+
V
SC
2
Isource = –1mA
Isink = 0.5mA
Isource = –1mA
Isink = 0.5mA
Isource = –1mA
Isink = 0.5mA
Isource = –1mA
Isink = 0.5mA
Isource = –1mA
Isink = 0.5mA
13
NMIC
11
OUTE
GND 8
BAI 1
+
Backup regulator
Main
regulator
9 NMI
NMI judge
circuit
+
Reference
oscillation
circuit
STBY
control
circuit
Counter
15 STBY
OUTE
control
circuit
Frequency
comparator
RESET
control
circuit
12 RESET
10
OUTE
16
W/D
14
RSTTC
Timing Chart
V
CC
V
S
V
SC
NMI
STBY
RESET
OUTE
OUTE
W/D
Power on
HI or Lo
W/D input stop W/D input start
(microcomputer (microcomputer
resets)
runaway)
Power off
T
WS
T
RC
T
WE
T
ST
T
RE
T
RS
T
RP
T
NR
0V
V
NIL
+∆V
N
V
NIL
(BAI=14V)
0V
Notes: The direction of current flowing into the IC is positive (+).
16
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