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 = 25ºC) · 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 85ºC · Packages: SMV can be mounted on a 3.1 × 3.0 mm space. How to Order Product No. Package Type TA76433FC SMV (surface-mount type) TA76433FC (TE85L) 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) 3F 1 2 3 Pin No. Symbol Description 1 REF Reference voltage terminal of 1.26 V 2 A Ground terminal 3 K Constant output voltage terminal 4 A Ground terminal 5 VCC 1 Power supply input terminal 2002-02-15 TA76433FC Functional Block Diagram Input (VCC) Circuit Symbol Cathode (K) Input (VCC) Reference (REF) Cathode (K) 1.26 V Reference (REF) Anode (A) Anode (A) Typical Application Circuits RSD VOUT VIN R1 VCC K R1 ö æ VOUT = VREF ç1 + ÷ + IREF･R1 è R2 ø CL REF A R2 GND Application Circuit Example Error amplification circuit for switching power supply VO+ Photocoupler + Control IC Control IC TA76433FC Photocoupler 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. VO(Primary) (Secondary) 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. 2 2002-02-15 TA76433FC Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Power supply voltage VCC 15 V Cathode voltage VKA VCC V Reference voltage VREF 7 V Cathode current IK 20 mA Cathode-anode reverse current -IK 10 mA Reference current IREF 50 mA Reference-anode reverse current -IREF 10 mA Power supply current ICC 3 mA Power dissipation PD 0.2 W 0.38 (Note) 625 Thermal resistance Rth ºC/W 328 (Note) Topr -40~85 ºC Junction temperature Tj 150 ºC Storage temperature Tstg -55~150 ºC Operating temperature 2 Note: Mounted on a glass-epoxy substrate: 30 mm ´ 30 mm ´ 0.8 mmt (Cu pad area 50 mm ) Recommended Operating Conditions Characteristics Symbol Min Typ. Max Unit Power supply voltage VCC VREF ¾ 14 V Cathode voltage VKA 0.2 ¾ VCC V Cathode current IK 0.4 ¾ 15 mA Topr -40 ¾ 85 °C Operating temperature 3 2002-02-15 TA76433FC Electrical Characteristics (Unless otherwise specified, VCC = 2 V, IK = 5 mA, Ta = 25°C) Characteristics Reference voltage Symbol VREF 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 VREF (dev) Test Condition Min Typ. Max Unit 1.242 1.26 1.278 V ¾ 5 15 mV ¾ -0.3 -1.5 mV/V VKA = VREF, R1 = 10 kW, R2 = ¥ ¾ 2 4 mA 0°C < = Ta < = 85°C, VKA = VREF, R1 = 10 kW, R2 = ¥ ¾ 0.3 1.2 mA VKA = VREF 0°C < = Ta < = 85°C, VKA = VREF DVREF/DVCC 1.8 V < = VCC < = 15 V IREF IREF (dev) Minimum cathode current for regulation IKmin VKA = VREF ¾ 200 400 mA Cathode saturation voltage VKsat VREF = 1.3 V, IK = 5 mA ¾ 0.05 0.2 V IKoff VKA = VCC = 15 V, VREF = 0 V ¾ ¾ 1.0 mA ïZKAï 0.4 mA < = IK < = 15 mA, f < = 1 kHz ¾ 0.2 0.5 W Off-State cathode current Dynamic impedance 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 æV 6 ç REF (dev) ´ 10 ç ç VREF @25 °C a VREF = è DTa VREF (dev) min ö ÷ ÷ ÷ ø ppm °C DTa 4 2002-02-15 TA76433FC PDmax – Ta VREF – Ta 1.28 (1) Mounted on a glass-epoxy substrate 30 ´ 30 ´ 0.8 mm t 2 Cupper pad area: 50 mm (1) 0.4 0.3 (2) 0.2 0.1 0 0 20 40 60 VCC = 2 V 1.27 (2) Ta = 25°C 80 100 120 140 1.26 1.25 0 40 IK – VKA (mA) (mA) IK IK VKA = VREF IK Cathode current VCC = 2 V Cathode current 10 0 85 Input VKA VCC IK 85 25 0 Ta = -40°C Ta = -40°C 85 25 -0.5 0 0.5 1.0 Cathode voltage VKA -100 -1 1.5 -0.5 (V) 0 0.5 1.0 Cathode voltage VKA DVREF – VCC 1.5 (V) IREF – Ta 0 4 (mA) Input -2 Reference current IREF (mV) 160 100 Ta = -40°C Change in reference voltage DVREF 120 VKA = VREF VCC = 2 V 200 25 -10 -1.0 80 IK – VKA 300 VCC IK Ambient temperature Ta (°C) 20 VKA VCC VREF Ambient temperature Ta (°C) Input VKA IK = 5 mA 1.24 -40 160 Input VKA = VREF (V) 0.5 Reference voltage VREF Allowable power dissipation PDmax (W) 0.6 -4 -6 VKA = VREF VKA 10 kW VCC IK 3 IREF IK = 5 mA 2 1 IK = 5 mA Ta = 25°C -8 0 5 Power supply voltage VCC 0 -40 15 10 (V) 0 40 80 120 160 Ambient temperature Ta (°C) 5 2002-02-15 TA76433FC ICC – IK Safe operating area 3 (mA) Unstable Power supply current ICC Cathode current VKA = VREF Ta = 25°C 15 Stable IK (mA) 20 10 VKA = VREF Ta = 25°C IK 5 CL 0 0.001 0.003 0.01 Load capacitance CL 0.03 2 VCC = 5 V 2V 1 0 0 0.1 5 (mF) Cathode current 15 IK 20 (mA) VKsat – IK 100 (mV) VKA = VREF 2 0 -2 5 10 Cathode current IK 15 VREF = 1.3 V VCC = 2 V VKsat VCC = 2 V Ta = 25°C 80 Cathode saturation voltage Change in reference voltage DVREF (mV) DVREF – IK 4 -4 0 10 60 40 20 0 0 20 (mA) Ta = 25°C 4 8 Cathode current 6 12 IK 16 20 (mA) 2002-02-15 TA76433FC Package Dimensions Weight: 0.014 g (typ.) 7 2002-02-15 TA76433FC 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. 8 2002-02-15