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TA76433FC
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA76433FC
High-Precision Shunt Regulators with Adjustable Output Voltage
Due to the increasing requirement for low power dissipation levels, 3-V power supply systems in electronic equipment are now in greater demand than conventional 5-V power supply systems. Toshiba has developed the TA76433FC, a high-precision shunt regulator with adjustable output voltage is aimed for use in even lower voltage applications. It differs from the conventional shunt regulator (TA76431/432 series) of our company, the power supply input terminal which became separate of the cathode terminal is set up. Since the cathode terminal of the detection side and the input terminal of the power supply side is separate, a cathode terminal can operate from 0.2 V. It is suitable for the secondary side difference amplifier of the switching regulator of 1.8 V to 2 V class.
Weight: 0.014 g (typ.)
Features
* * * * * * * * Separate power supply input pin (VCC) and cathode pin (K) Precision reference voltage: VREF = 1.26 V 1.4% (Ta = 25C) Maximum cathode voltage: 15 V Maximum cathode current: 20 mA Cathode voltage: 0.2 to 14 V Cathode current: 0.4 to 20 mA Operating temperature: Ta = -40 to 85C Packages: SMV can be mounted on a 3.1 x 3.0 mm space.
How to Order
Product No. TA76433FC TA76433FC (TE85L) Package Type SMV (surface-mount type) Package Type and Capacity On cut tape (TE85L): 100/tape section Embossed tape (TE85L): 3000/tape section
Pin Assignment/Marking
5 4 1: Reference (REF) 2: Anode (A) 3: Cathode (K) 4: Anode (A) 5: Input (VCC) 3 Pin No. 1 2 3 4 5 Symbol REF A K A VCC Description Reference voltage terminal of 1.26 V Ground terminal Constant output voltage terminal Ground terminal Power supply input terminal
3F
1
2
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TA76433FC
Functional Block Diagram
Input (VCC) Cathode (K)
Circuit Symbol
Input (VCC) Cathode (K)
Reference (REF) 1.26 V
Reference (REF)
Anode (A)
Anode (A)
Typical Application Circuits
RSD VIN R1 VCC REF R2 K CL A GND VOUT
R1 o ae VOUT = VREF c1 + / + IREFR1 e R2 o
Application Circuit Example
Error amplification circuit for switching power supply
VO+ Photocoupler + Control IC TA76433FC Photocoupler VO(Primary) (Secondary) Control IC The circuit amplifies the difference (a changed value) of the reference voltage of a shunt regulator and the output voltage of a switching regulator, and is fed back to a primary side through a photocoupler.
Precautions during Use
(1) TA76433FC These products contain MOS elements. Please take care to avoid generating static electricity when handling these devices. (2) TA76433FC 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. (3) Precautions when handling anode pin of TA76433FC Pin 2 and pin 4 should normally be shorted together. Do not leave pin 4 open and use pin 2 only.
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Maximum Ratings (Ta = 25C)
Characteristics Power supply voltage Cathode voltage Reference voltage Cathode current Cathode-anode reverse current Reference current Reference-anode reverse current Power supply current Power dissipation Symbol VCC VKA VREF IK -IK IREF -IREF ICC PD Rating 15 VCC 7 20 10 50 10 3 0.2 W 0.38 (Note) 625 Thermal resistance Operating temperature Junction temperature Storage temperature Rth Topr Tj Tstg C/W 328 (Note) -40~85 150 -55~150 C C C
2
Unit V V V mA mA mA mA mA
Note: Mounted on a glass-epoxy substrate: 30 mm 30 mm 0.8 mmt (Cu pad area 50 mm )
Recommended Operating Conditions
Characteristics Power supply voltage Cathode voltage Cathode current Operating temperature Symbol VCC VKA IK Topr Min VREF 0.2 0.4 -40 Typ. 3/4 3/4 Max 14 VCC 15 85 Unit V V mA C
3/4 3/4
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Electrical Characteristics (Unless otherwise specified, VCC = 2 V, IK = 5 mA, Ta = 25C)
Characteristics Reference voltage Deviation of reference input voltage overtemperature Ratio of change in reference input voltage to the change in power supply voltage Reference Input current Deviation of reference input current over temperature Minimum cathode current for regulation Cathode saturation voltage Off-State cathode current Dynamic impedance Symbol VREF VREF (dev) VKA = VREF 0C < Ta < 85C, VKA = VREF = = Test Condition Min 1.242 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 Typ. 1.26 5 -0.3 2 0.3 200 0.05 3/4 0.2 Max 1.278 15 -1.5 4 1.2 400 0.2 1.0 0.5 Unit V mV
DVREF/DVCC 1.8 V < VCC < 15 V = = IREF IREF (dev) IKmin VKsat IKoff iZKAi VKA = VREF, R1 = 10 kW, R2 = 0C < Ta < 85C, VKA = VREF, = = R1 = 10 kW, R2 = VKA = VREF VREF = 1.3 V, IK = 5 mA VKA = VCC = 15 V, VREF = 0 V 0.4 mA < IK < 15 mA, f < 1 kHz == =
mV/V mA mA mA V mA W
The deviation parameters VREF (dev) and IREF (dev) are defined as the maximum variation of the VREF and IREF over the rated temperature range. The average temperature coefficient of the VREF is defined as:
VREF max VREF (dev) min aeV 6 c REF (dev) 10 c c VREF @25 C a VREF = e DTa o / / / o
ppm C
DTa
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PDmax - Ta
0.6 1.28 (1) Mounted on a glass-epoxy substrate Cupper pad area: 50 mm (1) 0.4 (2) Ta = 25C
2
VREF - Ta
Input VKA IK
(W)
Allowable power dissipation PDmax
(V)
0.5
30 30 0.8 mm t 1.27
VKA = VREF VCC = 2 V IK = 5 mA VREF 1.26 VCC
0.3 (2) 0.2
Reference voltage VREF
100 120 140 160
1.25
0.1
0 0
20
40
60
80
1.24 -40
0
40
80
120
160
Ambient temperature Ta (C)
Ambient temperature Ta (C)
IK - VKA
20 Input VKA VCC 300 Input
IK - VKA
VKA IK
(mA)
VCC 10
IK
(mA)
200
IK
VKA = VREF VCC = 2 V
Cathode current
Cathode current
IK
VKA = VREF VCC = 2 V
100 85 25 0 Ta = -40C 85 25 Ta = -40C
0 85 25 Ta = -40C -10 -1.0 -0.5 0 0.5 1.0 1.5
-100 -1
-0.5
0
0.5
1.0
1.5
Cathode voltage VKA
(V)
Cathode voltage VKA
(V)
DVREF - VCC
(mV)
0 4
IREF - Ta
Input VKA 10 kW VCC 3 IREF 2 IK = 5 mA IK
Change in reference voltage DVREF
-2
-4
-6
Reference current IREF
15
(mA)
1
VKA = VREF IK = 5 mA Ta = 25C
-8 0
5
10
0 -40
0
40
80
120
160
Power supply voltage VCC
(V)
Ambient temperature Ta (C)
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Safe operating area
20 3 VKA = VREF Ta = 25C
ICC - IK
(mA)
15 Unstable Stable
Power supply current ICC
(mA)
2
IK
VCC = 5 V 2V
Cathode current
10 VKA = VREF Ta = 25C 5 IK CL
1
0 0.001
0.003
0.01
0.03
0.1
0 0
5
10
15
20
Load capacitance CL
(mF)
Cathode current
IK
(mA)
DVREF - IK
(mV)
4 100
VKsat - IK
(mV)
VKA = VREF VCC = 2 V Ta = 25C VREF = 1.3 V VCC = 2 V 80 Ta = 25C
Change in reference voltage DVREF
2
Cathode saturation voltage
VKsat
20
60
0
40
-2
20
-4 0
5
10
15
0 0
4
8
12
16
20
Cathode current IK
(mA)
Cathode current
IK
(mA)
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Package Dimensions
Weight: 0.014 g (typ.)
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RESTRICTIONS ON PRODUCT USE
000707EBA
* TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc.. * The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer's own risk. * The products described in this document are subject to the foreign exchange and foreign trade laws. * The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. * The information contained herein is subject to change without notice.
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