TA76L431FT/S TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA76L431FT,TA76L431S 2.49-V Adjustable High-Precision Shunt Regulators These devices are adjustable high-precision shunt regulators whose output voltage (VKA) can be set arbitrarily using two external resistors. The devices have a precise internal reference voltage of 2.49 V, enabling them to operate at low voltage. In addition, they can be used as zener diodes to perform temperature compensation. TA76L431FT Features • Precision reference voltage : VREF = 2.49V ± 1.0% (Ta = 25ºC) • Adjustable output voltage : VREF ≤ VOUT ≤ 19 V • TA76L431S Minimum cathode current for regulation :Ikmin = 0.5 mA (max.) • Operating temperature: Ta = −40~85ºC • Packages: UFV (TA76L431FT), TO-92MOD (TA76L431S) • The TA76L431FT is housed in an ultra-thin UFV package. (thickness: 0.7 mm typ.) Weight SSOP5-P-0.65C : 0.007 g (typ.) SSIP3-P-1.27 : 0.36 g (typ.) 1 2006-11-06 TA76L431FT/S Pin Assignment/Marking TA76L431FT 5 TA76L431S 4 1: NC 2: ANODE (A) 3: CATHODE (K) 4: REFERENCE (REF) 5: ANODE (A) 1F 1 2 1 3 TA76L 2 431S 3 1: REFERENCE (REF) 2: ANODE (A) 3: CATHODE (K) A line indicates lead (Pb)-free finish. Lot No: (weekly code) How to Order Product No. TA76L431FT (TE85L,F Package Type UFV (surface-mount type) Packing Type and Capacity Minimum Order Embossed tape: 3000/tape 1 tape TA76L431S(Q) TO-92MOD Loose in bag: 200/bag 1 bag TA76L431S (TPE6,Q) (lead type) Radial tape: 2000/tape 1 tape Note: The lead pitch for the TA76L431S(Q) and TA76L431S(TPE6,Q) may vary. Functional Block Diagram Circuit Symbol Cathode (K) Cathode (K) Reference (REF) Reference (REF) 2.49V Anode (A) Anode (A) 2 2006-11-06 TA76L431FT/S Typical Application Circuits (1) 2.49 V Reference (VKA = VREF) (2) Shunt regulator (VKA > VREF) VIN VIN VOUT R1 VOUT = 2.49 V R2 VREF ⎛ R ⎞ VOUT = VREF ⎜⎜ 1 + 1 ⎟⎟ + IREF ⋅ R1 R2 ⎠ ⎝ Precautions during Use 1. TA76L431FT, TA76L431S These products contain MOS elements. Please take care to avoid generating static electricity when handling these devices. 2. TA76L431FT, TA76L431S 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 3. Precautions when handling anode pin of TA76L431FT 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. Absolute Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Cathode voltage VKA 20 V Cathode current IK 50 mA Cathode-anode reverse current −IK 50 mA Reference voltage VREF 7 V Reference current IREF 50 μA Reference-anode reverse current −IREF 10 mA Power dissipation Thermal resistance TA76L431FT TA76L431S TA76L431FT TA76L431S PD Rth 0.45 (Note 1) 0.8 277 (Note 1) 156 W ºC/W Topr −40∼85 ºC Junction temperature Tj 150 ºC Storage temperature Tstg −55∼150 ºC Operating temperature 2 Note 1: Glass epoxy substrate 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). 3 2006-11-06 TA76L431FT/S Recommended Operating Conditions Characteristics Symbol Min Typ. Max Unit Cathode voltage VKA VREF ⎯ 19 V Cathode current IK 0.5 ⎯ 40 mA −40 ⎯ 85 °C Operating temperature Topr Electrical Characteristics (Unless otherwise specified, Ta = 25°C, IK = 10 mA) Characteristics Symbol Reference voltage Test Condition VREF (dev) Ratio of change in reference input voltage to the change in cathode voltage ΔVREF/ΔV Reference Input current IREF Deviation of reference input current over temperature Typ. Max Unit 2.465 2.49 2.515 V 0°C < = Ta < = 70°C, VKA = VREF ⎯ 5 15 mV VREF < = VKA < = 10 V ⎯ 0.8 2.4 10V < = VKA < = 19 V ⎯ 0.8 2.0 VKA = VREF ⎯ 0.6 3 μA 0°C < = Ta < = 70°C, VKA = VREF, R1 = 10 kΩ, R2 = ∞ ⎯ 0.3 1.2 μA VKA = VREF VREF Deviation of reference input voltage over temperature Min IREF (dev) mV/V Minimum cathode current for regulation IKmin VKA = VREF ⎯ 0.2 0.5 mA Off-State cathode current IKoff VKA = 19 V, VREF = 0 V ⎯ ⎯ 1.0 μA ⎪ZKA⎪ VKA = VREF, f < = 1 kHz, 0.5 mA < = IK < = 40 mA ⎯ 0.2 0.5 Ω 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(Ta=0 to 70℃). The average temperature coefficient of the VREF is defined as: VREF max 6 ⎛V ⎜ REF (dev) × 10 ⎜⎜ V REF @25°C αVREF = ⎝ ΔTa VREF (dev) min ⎞ ⎟ ⎟⎟ ⎠ (ppm °C ) ΔTa Application Circuit Example Error amplification circuit for switching power supply Photocoupler VOUT 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. 4 2006-11-06 TA76L431FT/S PDmax – Ta Mounted on glass epoxy substate : 30 × 30 × 0.8 mm t 0.5 Cupper pad area: 35 mm2 0.4 0.3 0.2 0.1 0 0 20 40 60 80 100 120 140 TA76L431S (W) TA76L431FT PDmax – Ta 1.0 Allowable power dissipation PDmax Allowable power dissipation PDmax (W) 0.6 0.8 0.6 0.4 0.2 0 160 0 20 Ambient temperature Ta (°C) 40 VKA Input 160 (μA) Ta = 25°C 0 −20 IK 400 VKA = VREF IK VKA = VREF Cathode current (mA) 140 VKA IK IK 120 600 Input Cathode current 100 IK – VKA IK – VKA 85°C Ta = 25°C 85°C Ta = −40°C 0 85°C 25°C Ta = −40°C Ta = −40°C 0 1.0 Cathode voltage 2.0 VKA −200 −1.0 3.0 −0 (V) (V) 100 100 150 Ambient temperature Ta (°C) Input −20 VREF VKA R1 2.47 2.47 -10 R2 IKIK 2.49 2.49 50 50 VKA 3.0 0 VV KA KA Change in reference voltage ΔVREF (mV) VV REF REF 00 2.0 1.0 ΔVREF – VKA VV KA REF KA= =VV REF Input Inpu IKIK= =1010mA mA 2.45 2.45 −50 −50 25°C Cathode voltage VREF – Ta 2.53 2.53 2.51 2.51 IK min 200 25°C −50 −1.0 Reference voltage VREF (V) 80 Ambient temperature Ta (°C) 50 20 60 −30 0 IK IK = 10 mA Ta = 25°C 5 10 Cathode voltage 5 15 VKA 20 25 (V) 2006-11-06 TA76L431FT/S IREF – Ta 1.0 1.0 ZKA – f 100 220 Ω eo 0.4 0.4 Input Input VVKA KA IIKK 0.2 0.2 IIREF REF ZKA (Ω) 0.6 0.6 30 Dynamic impedance 0.8 0.8 10kΩ 10kΩ Reference current IREF (μA) 50 5 IK eo = RS RS ＞ ZKA eo = 10 ei ・ZKA RS + ZKA ei GND ei ・ZKA RS e ∴ ZKA = o ・RS ei 3 Ta = 25°C VKA = VREF 0.5 mA ≦ −IK ≦ 50mA 1 0.5 0.3 IIKK == 10 10 mA mA 00 −50 −50 00 50 50 100 100 0.1 1k 150 150 10 k Ambient temperature Ta (°C) 100 k Frequency f AV – f 10 M 1M (Hz) Pulse response Input monitor 0 GND IK = 10 mA Ta = 25°C 30 Input 5 20 220 Ω Output Pulse 50 Ω 40 VOUT Voltage swing (Ｖ) 10 kΩ VIN IK 220 Ω 10 kΩ 10 μF 50 Generator f = 100 kHz GND 3 2 Output 1 10 0 0 1k 10 k 100 k 1M Frequency f 10 M 0 1 2 (Hz) 3 4 5 6 Time t (μs) Stability boundaty conditions IK 40 CL IK (mA) 50 Cathode current Open loop voltage gain AV (dB) 60 30 Unstable Stable Ta = 25°C VKA = VREF(2.49V)～15V 20 10 0 0.0001 0.001 0.01 0.1 1 10 100 Load capacitance CL (μF) 6 2006-11-06 TA76L431FT/S Package Dimensions TA76L431FT (UFV) Weight: 0.007 g (typ.) 7 2006-11-06 TA76L431FT/S Package Dimensions TA76L431S (TO-92MOD) Weight: 0.36 g (typ.) 8 2006-11-06 TA76L431FT/S RESTRICTIONS ON PRODUCT USE 20070701-EN • The information contained herein is subject to change without notice. • 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 his document shall be made at the customer’s own risk. • The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. • The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patents or other rights of TOSHIBA or the third parties. • Please contact your sales representative for product-by-product details in this document regarding RoHS compatibility. Please use these products in this document in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances. Toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations. 9 2006-11-06