TA76432FT/FC/F/FR/S
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA76432FT,TA76432FC,TA76432F,TA76432FR,TA76432S
1.26-V Adjustable High-Precision Shunt Regulators
These devices are adjustable high-precision shunt regulators
whose output voltage (V
KA
) can be set arbitrarily using two
external resistors.
These devices have a precise internal reference voltage of 1.26 V,
enabling them to operate at low voltage.
These devices are ideal for use as error amplifiers in 3-V
switching-regulator systems. In addition, they can be used as
zener diodes to perform temperature compensation.
TA76432FT
Features
·
·
·
·
·
·
Precision reference voltage: V
REF
= 1.26 V ± 1.4% (Ta = 25°C)
Small temperature coefficient: |αV
REF
| = 30 ppm/°C (typ.)
Adjustable output voltage: V
REF
≤
V
OUT
≤
19 V
Minimum cathode current for regulation:
I
kmin
= 0.5 mA (max.)
Operating temperature: Ta =
−40~85°C
Packages: UFV (TA76432FT), SMV (TA76432FC),
PW-MINI (TA76432F/FR) and
TO-92MOD (TA76432S)
The TA76432FT is housed in an ultra-thin UFV package.
(thickness: 0.7 mm typ.)
TA76432F/FR
TA76432FC
·
TA76432S
Weight
SSOP5-P-0.65C
SSOP5-P-0.95
HSOP3-P-1.50
SSIP3-P-1.27
: 0.007 g (typ.)
: 0.014 g (typ.)
: 0.05 g (typ.)
: 0.36 g (typ.)
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TA76432FT/FC/F/FR/S
Pin Assignment/Marking
TA76432FT/TA76432FC
5
4
1: NC
2: ANODE (A)
3: CATHODE (K)
4: REFERENCE (REF)
5: ANODE (A)
3
1
2
3
No.
1
2
3
Type marking
(two-digit number)
• TA76432F: AU
• TA76432FR: BU
TA76432F/FR
Lot No. (three-digit number)
Lot No.
Þ
The week of manufacture
Þ
The year of manufacture
(last decimal digit of the year of
manufacture)
TA76432F
CATHODE (K)
ANODE (A)
REFERENCE
(REF)
TA76432FR
REFERENCE
(REF)
ANODE (A)
CATHODE (K)
2F
1
2
TA76432S
1
2
3
TA76
432S
1: REFERENCE (REF)
2: ANODE (A)
3: CATHODE (K)
Lot No: Last decimal digit of the year of manufacture and January
to December is denoted by alphabet A to L respectively.
For example: Jan-2001 coded to “1A”
Note: TA76432F vs. TA76432FR: reverse
pin connection.
How to Order
Product No.
TA76432FT (TE85L)
(surface-mount type)
SMV
TA76432FC (TE85L)
(surface-mount type)
TA76432F/R
TA76432F/R (TE12L)
TA76432S
TA76432S (TPE6)
PW-MINI (SOT-89)
(surface-mount type)
TO-92MOD
(lead type)
On cut tape (TE12L): 100/tape section
Embossed tape: 1000/tape
Loose in bag: 200/bag
Radial tape: 2000/tape
100
1 tape
1 bag
1 tape
Embossed tape: 3000/tape
1 tape
Package Type
UFV
Embossed tape: 3000/tape
1 tape
Packing Type and Capacity
Minimum Order
Note: The lead pitch for the TA76432S and TA76432S (TPE6) may vary.
Functional Block Diagram
Cathode (K)
Circuit Symbol
Cathode (K)
Reference (REF)
Reference (REF)
1.26 V
Anode (A)
Anode (A)
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TA76432FT/FC/F/FR/S
Typical Application Circuits
1.26 V Reference (V
KA
=
V
REF
)
V
IN
V
OUT
=
1.26 V
Shunt regulator (V
KA
>
V
REF
)
V
IN
R1
V
OUT
R2
V
REF
æ
R
ö
V
OUT
=
V
REF
ç
1
+
1
÷ +
I
REF
×
R1
ç
R
÷
è
2
ø
Precautions during Use
(1)
TA76432FT, TA76432FC, TA76432F/FR, TA76432S
These products contain MOS elements. Please take care to avoid generating static electricity when
handling these devices.
TA76432FT, TA76432FC, TA76432F/FR, TA76432S
The oscillation frequency of these devices is determined by the value of the capacitor connected between
the anode and the cathode.
When establishing maximum operating condition parameters, please derate the maximum rating values
specified in these datasheets so as to allow an operational safety margin.
Use of a laminated ceramic capacitor is recommended.
Precautions when handling anode pin of TA76432FT/TA76432FC
Pin 2 and pin 5 should normally be shorted together. If only pin 5 is used, pin 2 should either be left open
or always kept at a lower potential than pin 5. Do not leave pin 5 open and use pin 2 only.
(2)
(3)
Maximum Ratings
(Ta
=
25°C)
Characteristics
Cathode voltage
Cathode current
Cathode-anode reverse current
Reference voltage
Reference current
Reference-anode reverse current
TA76432FT
TA76432FC
Power dissipation
TA76432F/FR
TA76432S
TA76432FT
TA76432FC
Thermal resistance
TA76432F/FR
TA76432S
Operating temperature
Junction temperature
Storage temperature
T
opr
T
j
T
stg
R
th
328 (Note 2)
250
156
-40~85
150
-55~150
ºC
ºC
ºC
2
2
ºC/W
P
D
0.38 (Note 2)
0.5
0.8
277 (Note 1)
625
W
Symbol
V
KA
I
K
-I
K
V
REF
I
REF
-I
REF
Rating
20
20
10
7
50
10
0.45 (Note 1)
0.2
Unit
V
mA
mA
V
mA
mA
Note 1: Glass epoxy substrate mounting: 30 mm
´
30 mm
´
0.8 mmt (Cu pad area 35 mm )
Note 2: Glass epoxy substrate mounting: 30 mm
´
30 mm
´
0.8 mmt (Cu pad area 50 mm )
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TA76432FT/FC/F/FR/S
Recommended Operating Conditions
Characteristics
Cathode voltage
Cathode current
Operating temperature
Symbol
V
KA
I
K
T
opr
Min
V
REF
0.5
-40
Typ.
Max
19
15
85
Unit
V
mA
°C
¾
¾
¾
Electrical Characteristics
(Unless otherwise specified, Ta
=
25°C, I
K
=
5 mA)
Characteristics
Reference voltage
Deviation of reference input voltage
over temperature
Ratio of change in reference input
voltage to the change in cathode
voltage
Reference Input current
Deviation of reference input current
over temperature
Minimum cathode current for
regulation
Off-State cathode current
Dynamic impedance
Symbol
V
REF
V
REF (dev)
DV
REF
/DV
I
REF
I
REF (dev)
I
Kmin
I
Koff
ïZ
KA
ï
V
KA
=
V
REF
0°C
<
Ta
<
85°C, V
KA
=
V
REF
=
=
V
REF
<
V
KA
<
5 V
=
=
5 V
<
V
KA
<
19 V
=
=
V
KA
=
V
REF
0°C
<
Ta
<
85°C, V
KA
=
V
REF
,
=
=
R
1
=
10 kW, R
2
= ¥
V
KA
=
V
REF
V
KA
=
19 V, V
REF
=
0 V
V
KA
=
V
REF
, f
<
1 kHz,
=
0.5 mA
<
I
K
<
15 mA
= =
Test Condition
Min
1.242
¾
¾
¾
¾
¾
¾
¾
¾
Typ.
1.26
3
0.5
0.3
2
0.3
0.2
¾
0.2
Max
1.278
15
2.5
mV/V
2.0
4
1.2
0.5
1.0
0.5
mA
mA
mA
mA
W
Unit
V
mV
The deviation parameters V
REF (dev)
and I
REF (dev)
are defined as the maximum variation of the V
REF
and I
REF
over the
rated temperature range.
The average temperature coefficient of the V
REF
is defined as:
V
REF
max
V
REF (dev)
min
6
æ
V
ç
REF (dev)
´
10
ç
V
ç
REF
@25
°
C
a
V
REF
= è
D
Ta
ö
÷
÷
÷
ø
ppm
°
C
DTa
Application Circuit Example
Error amplification circuit for switching power supply
V
OUT
Photo-
coupler
GND
Shunt regulator
This circuit amplifies the difference between the switching power supply’s secondary output voltage and the shunt
regulator’s reference voltage. It then feeds the amplified voltage back to the primary input voltage via the
photocoupler.
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TA76432FT/FC/F/FR/S
P
Dmax
– Ta
0.6
0.6
: 30
´
30
´
0.8 mm t
0.5
Cupper pad area: 35 mm
2
P
Dmax
– Ta
(W)
TA76432FC
0.5
①
0.4
①
Mounted on glass epoxy substate
: 30
´
30
´
0.8 mm t
Cupper pad area: 50 mm
2
②
Ta
=
25°C
Allowable power dissipation P
Dmax
(W)
TA76432FT
Mounted on glass epoxy substate
0.4
0.3
Allowable power dissipation P
Dmax
0.3
②
0.2
0.2
0.1
0.1
0
0
20
40
60
80
100
120
140
160
0
0
20
40
60
80
100
120
140
160
Ambient temperature Ta (°C)
Ambient temperature Ta (°C)
P
Dmax
– Ta
1.2
1.0
: 15
´
15
´
0.8 mm t
1.0
②
Ta
=
25°C
P
Dmax
– Ta
(W)
TA76432S
Allowable power dissipation P
Dmax
(W)
TA76432F, FR
①
Mounted on ceramic substate
Allowable power dissipation P
Dmax
120
140
160
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0
0
0
20
40
60
80
100
0
20
40
60
80
100
120
140
160
Ambient temperature Ta (°C)
Ambient temperature Ta (°C)
I
K
– V
KA
20
Input
VKA
300
Input
I
K
– V
KA
VKA
IK
IK min
(mA)
(mA)
I
K
IK
10
200
VKA
=
VREF
Ta
=
25°C
I
K
Cathode current
Cathode current
VKA
=
VREF
Ta
=
25°C
100
0
85°C
25°C
Ta
= -40°C
-10
-1.0
-0.5
0
0.5
1.0
1.5
85°C
25°C
0
Ta
=
-40°C
85°C
-100
-1.0
-0.5
0
0.5
Ta
= -40°C
25°C
1.0
1.5
Cathode voltage V
KA
(V)
Cathode voltage V
KA
(V)
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2002-07-12
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