TA76432AFT/AF/AFR/AS
TOSHIBA Bipolar Linear Integrated Circuit
Silicon Monolithic
TA76432AFT,TA76432AF,TA76432AFR,TA76432AS
1.26V Adjustable High-Precision Shunt Regulators
The TA76432 series consists of 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.
The devices are ideal for use as error amplifiers in 3V
switching-regulator systems. In addition, they can be used as
zener diodes to perform temperature compensation.
TA76432AFT
Features
•
•
•
•
•
•
•
Precision reference voltage: V
REF
= 1.26 V ± 1% (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
to 85°C
The TA76432AFT is housed in an ultra-thin UFV package.
(thickness: 0.7 mm typ.)
Packages: UFV (TA76432AFT),
PW-Mini (TA76432AF/AFR) and
LSTM (TA76432AS)
TA76432AS
SON5-P-0202-0.65C
TA76432AF/AFR
Weight
SON5-P-0202-0.65C : 0.007 g (typ.)
HSOP3-P-1.50
: 0.05 g (typ.)
: 0.36 g (typ.)
SSIP3-P-1.27
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2011-09-29
TA76432AFT/AF/AFR/AS
Pin Assignment/Marking
TA76432AFT
5
4
1: NC
2: ANODE (A)
3: CATHODE (K)
4: REFERENCE (REF)
5: ANODE (A)
3
1
2
3
Part No. (or
abbreviation code)
TA76432AF/AFR
Lot No.
Note
2A
1
2
No.
1
2
3
TA76432AF
CATHODE (K)
ANODE (A)
REFERENCE
(REF)
TA76432AFR
REFERENCE
(REF)
ANODE (A)
CATHODE (K)
TA76432AS
1
2
3
TA76
432AS
1: REFERENCE (REF)
2: ANODE (A)
3: CATHODE (K)
Note
Lot No.
•TA76432AF: AF
•TA76432AFR: BF
*: TA76432AF vs. TA76432AFR
Reverse pin connection
Note: A line under a Lot No. identifies the indication of product Labels.
Not underlined: [[Pb]]/INCLUDES > MCV
Underlined: [[G]]/RoHS COMPATIBLE or [[G]]/RoHS [[Pb]]
Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS
compatibility of Product. The RoHS is the Directive 2002/95/EC of the European Parliament and of the Council of 27
January 2003 on the restriction of the use of certain hazardous substan ces in electrical and electronic equipment.
How to Order
Product No.
TA76432AFT (TE85L,F
TA76432AF/AFR(F)
TA76432AF/AFR (TE12L,F
TA76432AS(F)
TA76432AS (TPE6,F)
Package Type
UFV
(surface-mount type)
PW-Mini (SOT-89)
(surface-mount type)
LSTM
(lead type)
Packing Type and Capacity
Embossed tape: 3000 pcs/reel
On cut tape (TE12L,F: 100 pcs/tape section
Embossed tape: 1000 pcs/reel
Loose in bag: 200 pcs/bag
Radial tape: 2000 pcs/pack
Note: The lead pitch for the TA76432AS and TA76432AS (TPE6,F) 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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2011-09-29
TA76432AFT/AF/AFR/AS
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
Usage Precautions
(1)
⎛
R
⎞
⎜
V
OUT
=
V
REF
⎜
1
+
1
⎟ +
I
REF
⋅
R1
R
2
⎟
⎝
⎠
TA76432AFT, TA76432AF/AFR, TA76432AS
These products contain MOS elements. Please take care to avoid generating static electricity when
handling these devices.
TA76432AFT, TA76432AF/AFR, TA76432AS
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 absolute 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 TA76432AFT
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)
Absolute Maximum Ratings
(Ta
=
25°C)
Characteristics
Cathode voltage
Cathode current
Cathode-anode reverse current
Reference voltage
Reference current
Reference-anode reverse current
TA76432AFT
Power dissipation TA76432AF/AFR
TA76432AS
TA76432AFT
Thermal
resistance
TA76432AF/AFR
TA76432AS
Operating temperature
Junction temperature
Storage temperature
T
opr
T
j
T
stg
R
th
P
D
Symbol
V
KA
I
K
−I
K
V
REF
I
REF
−I
REF
Rating
20
20
10
7
50
10
0.45 (Note 1)
0.5
0.8
277 (Note 1)
250
156
−40
to 85
150
−55
to 150
ºC
ºC
ºC
2
ºC/W
W
Unit
V
mA
mA
V
μA
mA
Note 1: Glass epoxy board mounting: 30 mm
×
30 mm
×
0.8 mmt (Cu pad area 35 mm )
Note 2: Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
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2011-09-29
TA76432AFT/AF/AFR/AS
Operating Ranges
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
⎯
⎯
⎯
Electrical Characteristics
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
(Unless otherwise specified, Ta
=
25°C, I
K
=
5 mA)
Symbol
V
REF
V
REF (dev)
ΔV
REF
/ΔV
I
REF
I
REF (dev)
I
Kmin
I
Koff
⎪Z
KA
⎪
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 kΩ, 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
1.247
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Typ.
1.26
3
0.5
0.3
2
0.3
0.2
⎯
0.2
Max
1.273
15
2.5
2.0
4
1.2
0.5
1.0
0.5
Unit
V
mV
mV/V
μA
μA
mA
μA
Ω
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
⎛
V
⎜
REF (dev)
×
10
⎜
V
⎜
REF
@25
°
C
α
V
REF
= ⎝
Δ
Ta
⎞
⎟
⎟
⎟
⎠
(
ppm
°
C
)
ΔTa
Application Circuit Example
Error amplification circuit for switching power supply
Photo-
coupler
V
OUT
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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2011-09-29
TA76432AFT/AF/AFR/AS
P
Dmax
– Ta
0.6
P
Dmax
– Ta
1.2
(W)
: 30
×
30
×
0.8 mm t
0.5
Cupper pad area: 35 mm
2
(W)
TA76432AFT
Mounted on glass epoxy substate
TA76432AF, AFR
①
①
Mounted on ceramic substate
: 15
×
15
×
0.8 mm t
②
Single
Allowable power dissipation P
Dmax
Allowable power dissipation P
Dmax
1.0
0.4
0.8
0.3
0.6
②
0.2
0.4
0.1
0.2
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
1.0
I
K
– V
KA
20
Input
VKA
IK
10
Allowable power dissipation P
Dmax
(W)
TA76432AS
I
K
(mA)
0.8
0.6
VKA
=
VREF
0.4
Cathode current
0
85°C
25°C
Ta
= −40°C
0.2
0
0
20
40
60
80
100
120
140
160
−10
−1.0
−0.5
0
0.5
1.0
1.5
Ambient temperature Ta (°C)
Cathode voltage
V
KA
(V)
I
K
– V
KA
300
Input
VKA
1.29
V
REF
– Ta
VKA
=
VREF
VKA
Input
VREF
IK
Reference voltage V
REF
(V)
(μA)
200
VKA
=
VREF
100
IK
IK min
IK
=
5 mA
1.28
I
K
1.27
Cathode current
1.26
25°C
0
Ta
=
−40°C
85°C
−100
−1.0
−0.5
0
85°C
Ta
= −40°C
25°C
1.25
0.5
1.0
1.5
1.24
−80
−40
0
40
80
120
160
Cathode voltage
V
KA
(V)
Ambient temperature Ta (°C)
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2011-09-29
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