Voltage Regulators
AN1433SSM
High accuracy, variable output, low voltage operation shunt regulator
I
Overview
The AN1433SSM is a low voltage operation and
highly accurate positive voltage variable output type shunt
regulator IC. Since the output voltage is adjustable from
approximately 1.25 V to 15 V, it is suitable for a power
supply of small-sized 3 V-system portable equipment. Also,
it contributes to the miniaturization of set equipment by
the adoption of the small type surface mounting package.
1.60
±0.10
0.20
1
1.20
±0.10
0.20
5
Unit: mm
M
ain
Di
sc te
on na
tin nc
ue e/
d
0.50 0.50
1.60
±0.10
1.00
±0.10
2
3
4
0.60 max.
I
Features
I
Applications
SSMINI-5D
•
Cellular phone, PHS, office automation equipment and
other small-sized portable equipment
Note) The package of this product will be changed
to lead-free type (SSMINI-5DA). See the new
package dimensions section later of this
datasheet.
Marking
A Q
on
tin
ue
an
ce
I
Block Diagram
/D
isc
Indicates No.1 pin
Part No. (2 letters)
V
CC
Ma
int
en
0.01
µF
K
Output
1
3
V
K
R1
I
REF
Ref.
Constant current source
5
Error
amplifier
Reference voltage
Output
transistor
R2
V
REF
2
A
V
K
= V
REF
(1 + R1)
+
I
REF
×
R1
R2
Publication date: December 2001
SFF00002CEB
4
0 to 0.10
•
Highly accurate reference voltage:
1.25 V (allowance:
±1%)
•
Low voltage operation: 1.25 V to 14 V
•
Small type surface mounting package
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0.12
+0.10
−0.05
0.20
−0.05
+0.10
1
AN1433SSM
I
Pin Descriptions
Pin No.
1
2
3
4
5
V
CC
Anode
K: Cathode
N.C.
Description
Power source current supply pin.
The reference voltage pin for the constant voltage of this shunt regulator IC. The current
from V
CC
, cathode and reference flow out from this pin.
The constant voltage output pin of this shunt regulator. The supplied current more than
necessary to this pin is bypassed to anode pin by the output transistor.
Nothing is connected to this pin. If high voltage is applied, the characteristics of the IC
may be affected.
I
Absolute Maximum Ratings
Parameter
Cathode voltage
Symbol
V
K
I
K
Reference voltage
Supply current
V
REF
Reference current
Cathode-anode reverse current
−I
KA
−I
KR
I
K
Cathode-reference reverse current
Cathode current
Power dissipation
*2
tin
ue
Operating ambient temperature
*1
Storage temperature
*1
I
Recommended Operating Range
Parameter
Supply voltage
Ma
int
en
Note) 1. Do not apply external currents or voltages to any pins not specifically mentioned.
For circuit currents, '+' denotes current flowing into the IC and '−' denotes current flowing out of the IC.
2. *1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for T
a
=
25°C.
*2: The value at T
a
=
85°C.
Symbol
V
CC
2
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Rating
14.2
7
Unit
V
V
1.5
50
mA
µA
I
REF
−10
−10
20
50
mA
mA
mA
°C
P
D
mW
°C
T
opr
T
stg
−30
to
+85
−55
to
+150
Range
Unit
V
V
REF
to 14
SFF00002CEB
an
ce
M
ain
Di
sc te
on na
tin nc
ue e/
d
Reference
The reference voltage (1.25 V typical) pin. Although the impedance is high under the no-
rmal using conditions, be careful that the impedance drops and current flows into the IC
inside if a current or voltage is forced to apply from the outside.
/D
isc
on
AN1433SSM
I
Electrical Characteristics at V
CC
=
1.8 V, T
a
=
25°C
Parameter
Reference voltage
Reference voltage
supply voltage fluctuation
Reference voltage
cathode current fluctuation
Reference input current
Symbol
V
REF
∆V
REF
∆V
CC
∆V
REF
∆I
K
I
REF
Conditions
I
K
=
10 mA
1.7 V
≤
V
CC
≤
14.0 V,
I
K
=
10 mA
0.2 mA
≤
I
K
≤
20 mA
R
1
=
10 kΩ, I
K
=
10 mA
V
K
=
V
REF
Min
Typ
Max
Unit
V
mV/V
mV/mA
µA
mA
µA
V
1.2375 1.25 1.2625
−
0.73
−1.5
0.04
4.0
0.08
0.3
10
0.2
1
0.15
Supply current
ICC
•
Design reference data
Parameter
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Symbol
∆V
REF
/
∆T
a
∆I
REF
/
∆T
a
Reference voltage change
with temperature
Reference input current change
with temperature
I
Application Notes
1. P
D
T
a
curves of SSMINI-5D package
0.200
Power dissipation
P
D
(W)
0.150
Ma
int
en
0.120
0.100
0.050
0.000
0
0
25
50
75
100
125
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I
K
=
10 mA
0.75
1.50
mA
Conditions
Reference value
3
Unit
mV
V
KA
=
V
REF
, I
KA
=
10 mA
0°C
≤
T
a
≤ +70°C
R
1
=
10 kΩ, I
K
=
10 mA
0°C
≤
T
a
≤ +70°C
1.1
mA
P
D
T
a
Independent IC
without heat sink
R
th(j-a)
= 833.3°C/W
an
ce
M
ain
Di
sc te
on na
tin nc
ue e/
d
Minimum cathode current
Off time total current
I
K min
I
OFF
V
K
=
14.0 V, V
REF
=
0 V
Cathode saturation voltage
V
Ksat
I
K
=
10 mA, V
REF
=
1.3 V
/D
isc
on
tin
ue
Ambient temperature
T
a
(°C)
SFF00002CEB
3
AN1433SSM
I
Application Notes (continued)
2. Main Characteristics
Supply current
1.00
0.95
0.90
0.85
V
CC
=
14 V
V
CC
=
5 V
V
K
=
V
REF
10
9
8
7
Reference input current
V
CC
=
1.8 V
R
1
=
10 kΩ
0.60
0.55
0.50
0
2
4
6
8
10
12
14
16
18
I
K
(mA)
Reference voltage (temperature characteristics)
6.0
4.0
2.0
0
V
CC
=
1.8 V
V
K
=
V
REF
T
a
=
0°C
25°C
I
REF
(µA)
−25°C
−2.0
−4.0
−6.0
−8.0
50°C
95°C
75°C
0
2
4
6
8
10
12
on
−10.0
14
16
18
I
K
(mA)
6
4
2
0
Ma
int
en
an
Reference voltage supply voltage fluctuation
V
K
=
V
REF
I
K
=
10 mA
∆V
REF
(mV)
−4
−6
−8
−10
−12
−14
−16
1.5 2
4
6
8
10
12
14
∆V
REF
(mV)
−2
V
CC
(V)
4
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2
1
0
M
ain
Di
sc te
on na
tin nc
ue e/
d
I
REF
(µA)
I
CC
(mA)
0.80
0.75
0.70
0.65
6
5
4
3
V
CC
=
1.8 V
20
0
2
4
6
8
10
12
14
16
18
20
I
K
(mA)
Reference current (temperature characteristics)
10
9
8
V
CC
=
1.8 V
V
K
=
V
REF
∆V
REF
(mV)
7
T
a
= −25°C
6
5
4
3
2
1
0°C
25°C
95°C
75°C
50°C
tin
ue
0
20
0
2
4
6
8
10
12
14
16
18
20
isc
I
K
(mA)
ce
/D
Reference voltage cathode current fluctuation
5
V
CC
=
1.8 V
V
K
=
V
REF
4
3
2
1
0
−1
−2
−3
−4
−5
0
2
4
6
8
10
12
14
16
18
20
I
K
(mA)
SFF00002CEB
AN1433SSM
I
Application Notes (continued)
2. Main Characteristics (continued)
V
REF
temperature characteristic
1.26
1.258
1.256
1.254
200
180
160
140
V
CC
=
1.8 V
V
REF
=
1.3 V
Cathode saturation voltage
1.244
1.242
1.24
−50
0
50
100
Temp. (°C)
Minimum cathode current
V
CC
=
1.8 V
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
4.6
4.7
4.8
4.9
5.0
5.1
on
−100
4.5
5.2
5.3
5.4
I
K
(µA)
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co L a d t ty
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life
an ut
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cy
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sta
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.
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.
40
20
0
150
0
2
4
6
8
10
12
14
16
18
20
Ma
int
en
an
ce
M
ain
Di
sc te
on na
tin nc
ue e/
d
V
REF
(V)
120
100
80
60
1.25
1.248
1.246
V
Ksat
(mV)
1.252
I
K
(mA)
∆V
REF
(mV)
tin
/D
isc
ue
5.5
SFF00002CEB
5
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