TA76432AFT/AF/AFR/AS TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA76432AFT,TA76432AF,TA76432AFR,TA76432AS 1.26-V Adjustable High-Precision Shunt Regulators The TA76432 series consists of adjustable high-precision shunt regulators whose output voltage (VKA) 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 3-V switching-regulator systems. In addition, they can be used as zener diodes to perform temperature compensation. TA76432AFT Features • Precision reference voltage: VREF = 1.26 V ± 1% (Ta = 25°C) • Small temperature coefficient: |αVREF| = 30 ppm/°C (typ.) • Adjustable output voltage: VREF ≤ VOUT ≤ 19 V • Minimum cathode current for regulation: Ikmin = 0.5 mA (max.) • Operating temperature: Ta = −40~85°C • Packages: UFV (TA76432AFT), PW-MINI (TA76432AF/AFR) and TO-92MOD (TA76432AS) • The TA76432AFT is housed in an ultra-thin UFV package. (thickness: 0.7 mm typ.) TA76432AF/AFR TA76432AS Weight SSOP5-P-0.65C : 0.007 g (typ.) HSOP3-P-1.50 : 0.05 g (typ.) SSIP3-P-1.27 : 0.36 g (typ.) 1 2006-11-07 TA76432AFT/AF/AFR/AS Pin Assignment/Marking TA76432AFT 5 TA76432AF/AFR Lot No. (three-digit number) 4 1: NC 2: ANODE (A) 3: CATHODE (K) 4: REFERENCE (REF) 5: ANODE (A) 2A 1 2 A line indicates lead (Pb)-free package or lead (Pb)-free finish. Lot No. ⇒ The week of manufacture 3 1 2 ⇒ The year of manufacture (last decimal digit of the year of manufacture) 3 Type marking (two-digit number) TA76432AS 1 •TA76432AF: AF •TA76432AFR: BF TA76 2 432AS 3 No. 1: REFERENCE (REF) 2: ANODE (A) 3: CATHODE (K) TA76432AF TA76432AFR CATHODE (K) REFERENCE (REF) 2 ANODE (A) ANODE (A) 3 REFERENCE (REF) CATHODE (K) 1 A line indicates lead (Pb)-free package or lead (Pb)-free finish. Lot No: The last decimal digit of the year of manufacture followed by the month as letters A to L of the alphabet. For example: Jan-2004 is coded as “4A” Note: TA76432AFvs.TA76432AFR: reverse pin connection. How to Order Product No. TA76432AFT (TE85L) TA76432AF/AFR TA76432AF/AFR (TE12L) Package Type UFV (surface-mount type) PW-MINI (SOT-89) (surface-mount type) Packing Type and Capacity Embossed tape: 3000/tape Minimum Order 1 tape On cut tape (TE12L): 100/tape section 100 Embossed tape: 1000/tape 1 tape TA76432AS TO-92MOD Loose in bag: 200/bag 1 bag TA76432AS (TPE6) (lead type) Radial tape: 2000/tape 1 tape Note: The lead pitch for the TA76432AS and TA76432AS (TPE6) may vary. Functional Block Diagram Circuit Symbol Cathode (K) Cathode (K) Reference (REF) Reference (REF) 1.26 V Anode (A) Anode (A) 2 2006-11-07 TA76432AFT/AF/AFR/AS Typical Application Circuits 1.26 V Reference (VKA = VREF) Shunt regulator (VKA > VREF) VIN VIN VOUT R1 VOUT = 1.26 V R2 VREF ⎛ R ⎞ VOUT = VREF ⎜⎜ 1 + 1 ⎟⎟ + IREF ⋅ R1 R 2⎠ ⎝ Precautions during Use (1) TA76432AFT, TA76432AF/AFR, TA76432AS These products contain MOS elements. Please take care to avoid generating static electricity when handling these devices. (2) 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 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 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. Absolute Maximum Ratings (Ta = 25°C) Characteristics Symbol Rating Unit Cathode voltage VKA 20 V Cathode current IK 20 mA Cathode-anode reverse current −IK 10 mA Reference voltage VREF 7 V Reference current IREF 50 μA Reference-anode reverse current −IREF 10 mA TA76432AFT Power dissipation TA76432AF/AFR 0.45 (Note 1) PD TA76432AS W 0.8 TA76432AFT Thermal resistance 0.5 277 (Note 1) ºC/W Rth 250 Topr −40∼85 ºC Junction temperature Tj 150 ºC Storage temperature Tstg −55∼150 ºC TA76432AF/AFR 156 TA76432AS Operating temperature 2 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). 3 2006-11-07 TA76432AFT/AF/AFR/AS Recommended Operating Conditions Characteristics Symbol Min Typ. Max Unit Cathode voltage VKA VREF ⎯ 19 V Cathode current IK 0.5 ⎯ 15 mA −40 ⎯ 85 °C Operating temperature Topr Electrical Characteristics (Unless otherwise specified, Ta = 25°C, IK = 5 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 1.247 1.26 1.273 V 0°C < = Ta < = 85°C, VKA = VREF ⎯ 3 15 mV VREF < = VKA < =5V ⎯ 0.5 2.5 5V< = VKA < = 19 V ⎯ 0.3 2.0 VKA = VREF ⎯ 2 4 μA 0°C < = Ta < = 85°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 < = 15 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. 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 2006-11-07 TA76432AFT/AF/AFR/AS PDmax – Ta Mounted on glass epoxy substate (W) TA76432AFT PDmax – Ta 1.2 : 30 × 30 × 0.8 mm t 0.5 Cupper pad area: 35 mm2 Allowable power dissipation PDmax Allowable power dissipation PDmax (W) 0.6 0.4 0.3 0.2 0.1 0 0 20 40 60 80 100 120 140 TA76432AF, AFR : 15 × 15 × 0.8 mm t 1.0 ② Ta = 25°C 0.8 0.6 0.4 0.2 0 0 160 ① Mounted on ceramic substate 20 40 60 PDmax – Ta TA76432AS (W) Input 160 VKA (mA) IK 0.4 0.2 IK 10 0.6 VKA = VREF Cathode current Allowable power dissipation PDmax 140 IK – VKA Ta = 25°C 0 85°C 25°C Ta = −40°C 0 20 40 60 80 100 120 140 −10 −1.0 160 −0.5 Ambient temperature Ta (°C) 0 0.5 Cathode voltage IK – VKA 1.0 VKA (V) 1.29 VKA = VREF VKA IK 200 IK = 5 mA IK min IK Reference voltage VREF (V) Input VKA = VREF Ta = 25°C 100 85°C 25°C 1.5 VREF – Ta 300 (μA) 120 20 0.8 0 Cathode current 100 Ambient temperature Ta (°C) Ambient temperature Ta (°C) 1.0 80 Ta = −40°C 0 Ta = −40°C 25°C 1.28 VKA Input VREF IK 1.27 1.26 1.25 85°C −100 −1.0 −0.5 0 Cathode voltage 0.5 VKA 1.0 1.24 −80 1.5 (V) −40 0 40 80 120 160 Ambient temperature Ta (°C) 5 2006-11-07 TA76432AFT/AF/AFR/AS ΔVREF – VKA IREF – Ta 4.0 −2 Input VREF VKA IK R1 −6 Reference current −4 −8 IK = 5 mA 3.0 VKA IK 10kΩ IREF (μA) Input R2 IREF IK = 5 mA 2.0 1.0 Ta = 25°C 5 10 15 Cathode voltage VKA 0.0 −40 20 (V) 0 40 AV – f 30 5 GND 3 Ta = 25°C VKA = VREF 0.5 mA ≦ −IK ≦ 15 mA RS ＞ ZKA eo = 10 ei ei RS ・ZKA e ∴ ZKA = o ・RS ei 0.5 0.3 10 k 100 k Frequency f 50 (Hz) VIN 40 30 VOUT GND IK = 5 mA Ta = 25°C 20 10 0 −10 1k 1M 10 μF IK 220 Ω ZKA (Ω) ei ・ZKA RS + ZKA Dynamic impedance RS eo = AV (dB) eo IK Open loop voltage gain 220 Ω 0.1 1k 160 60 50 1 120 Ambient temperature Ta (°C) ZKA – f 100 80 10 kΩ −10 0 10 kΩ Change in reference voltage ΔVREF (mV) 0 10 k 100 k Frequency f 1M 10 M (Hz) Pulse response Input 5 Input monitor 220 Ω Output Pulse Generator 50 Ω Voltage swing (Ｖ) 0 f = 100 kHz GND 1.5 Output 1.0 0.5 0 0 1 2 3 4 5 6 Time t (μs) 6 2006-11-07 TA76432AFT/AF/AFR/AS Stability boundary conditions IK 15 CL Cathode current IK (mA) 20 10 Unstable Stable Ta = 25°C VKA = VREF 5 0 0.001 0.003 0.01 0.03 0.1 0.3 1 3 5 10 30 100 Load capacitance CL (μF) 7 2006-11-07 TA76432AFT/AF/AFR/AS Package Dimensions TA76432AFT (UFV) Weight: 0.007 g (typ.) 8 2006-11-07 TA76432AFT/AF/AFR/AS Package Dimensions TA76432AF/AFR (PW-MINI) Weight: 0.05 g (typ.) 9 2006-11-07 TA76432AFT/AF/AFR/AS Package Dimensions TA76432AS (TO-92MOD) Weight: 0.36 g (typ.) 10 2006-11-07 TA76432AFT/AF/AFR/AS 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. 11 2006-11-07