Voltage Regulators AN1433SSM High accuracy, variable output, low voltage operation shunt regulator ■ Overview Unit: mm The AN1433SSM is a low voltage operation and highly accurate positive voltage variable output type shunt regulator IC. Since the output voltage is adjustable from approximately 1.25 V to 15 V, it is suitable for a power supply of small-sized 3 V-system portable equipment. Also, it contributes to the miniaturization of set equipment by the adoption of the small type surface mounting package. 1.60±0.10 0.20 0.20 1.20±0.10 5 0.20+0.10 −0.05 0.50 0.50 1.60±0.10 1.00±0.10 1 2 3 0.60 max. 4 ■ Features 0 to 0.10 0.12+0.10 −0.05 • Highly accurate reference voltage: 1.25 V (allowance: ±1%) • Low voltage operation: 1.25 V to 14 V • Small type surface mounting package ■ Applications SSMINI-5D • Cellular phone, PHS, office automation equipment and other small-sized portable equipment Note) The package of this product will be changed to lead-free type (SSMINI-5DA). See the new package dimensions section later of this datasheet. Marking A Q Indicates No.1 pin ■ Block Diagram VCC 0.01 µF K 1 VK R1 IREF Part No. (2 letters) Output 3 Constant current source 5 Ref. Error amplifier Output transistor Reference voltage R2 VREF 2 A 4 VK = VREF (1 + R1) + IREF × R1 R2 Publication date: December 2001 SFF00002CEB 1 AN1433SSM ■ Pin Descriptions Pin No. Description 1 VCC Power source current supply pin. 2 Anode The reference voltage pin for the constant voltage of this shunt regulator IC. The current from VCC, cathode and reference flow out from this pin. 3 K: Cathode The constant voltage output pin of this shunt regulator. The supplied current more than necessary to this pin is bypassed to anode pin by the output transistor. 4 N.C. Nothing is connected to this pin. If high voltage is applied, the characteristics of the IC may be affected. 5 Reference The reference voltage (1.25 V typical) pin. Although the impedance is high under the normal using conditions, be careful that the impedance drops and current flows into the IC inside if a current or voltage is forced to apply from the outside. ■ Absolute Maximum Ratings Parameter Symbol Rating Unit VK 14.2 V VREF 7 V IK 1.5 mA Reference current IREF 50 µA Cathode-anode reverse current −IKA −10 mA Cathode-reference reverse current −IKR −10 mA IK 20 mA PD 50 mW Topr −30 to +85 °C Tstg −55 to +150 °C Cathode voltage Reference voltage Supply current Cathode current Power dissipation *2 Operating ambient temperature Storage temperature *1 *1 Note) 1. Do not apply external currents or voltages to any pins not specifically mentioned. For circuit currents, '+' denotes current flowing into the IC and '−' denotes current flowing out of the IC. 2. *1: Except for the power dissipation, operating ambient temperature and storage temperature, all ratings are for Ta = 25°C. *2: The value at Ta = 85°C. ■ Recommended Operating Range Parameter Supply voltage 2 Symbol Range Unit VCC VREF to 14 V SFF00002CEB AN1433SSM ■ Electrical Characteristics at VCC = 1.8 V, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit Reference voltage VREF IK = 10 mA Reference voltage supply voltage fluctuation ∆VREF ∆VCC 1.7 V ≤ VCC ≤ 14.0 V, IK = 10 mA Reference voltage cathode current fluctuation ∆VREF ∆IK 0.2 mA ≤ IK ≤ 20 mA 0.04 0.3 mV/mA 1.2375 1.25 1.2625 − 0.73 −1.5 V mV/V Reference input current IREF R1 = 10 kΩ, IK = 10 mA 4.0 10 µA Minimum cathode current IK min VK = VREF 0.2 mA Off time total current IOFF VK = 14.0 V, VREF = 0 V 1 µA Cathode saturation voltage VKsat IK = 10 mA, VREF = 1.3 V 0.08 0.15 V Supply current ICC IK = 10 mA 0.75 1.50 mA • Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Parameter Symbol Conditions Reference voltage change with temperature ∆VREF / ∆Ta VKA = VREF , IKA = 10 mA 0°C ≤ Ta ≤ +70°C Reference input current change with temperature ∆IREF / ∆Ta R1 = 10 kΩ, IK = 10 mA 0°C ≤ Ta ≤ +70°C Reference value Unit 3 mV 1.1 mA ■ Application Notes 1. PD Ta curves of SSMINI-5D package PD T a Power dissipation PD (W) 0.200 0.150 Independent IC without heat sink Rth(j-a) = 833.3°C/W 0.120 0.100 0.050 0.000 0 0 25 50 75 100 125 Ambient temperature Ta (°C) SFF00002CEB 3 AN1433SSM ■ Application Notes (continued) 2. Main Characteristics Supply current Reference input current VK = VREF 1.00 9 0.95 8 0.90 VCC = 14 V 7 IREF (µA) ICC (mA) 0.85 VCC = 5 V 0.80 VCC = 1.8 V 0.75 6 5 0.70 4 0.65 3 0.60 2 0.55 1 0 0.50 0 2 4 6 8 10 12 14 16 18 0 20 2 4 6 8 10 12 14 16 18 20 IK (mA) IK (mA) Reference voltage (temperature characteristics) Reference current (temperature characteristics) 6.0 VCC = 1.8 V VK = VREF VCC = 1.8 V VK = VREF 10 4.0 9 Ta = 0°C 25°C 2.0 8 7 Ta = −25°C 0 −25°C IREF (µA) ∆VREF (mV) VCC = 1.8 V R1 = 10 kΩ 10 −2.0 −4.0 6 0°C 25°C 5 4 50°C −6.0 95°C 95°C 3 75°C 50°C 75°C 2 −8.0 −10.0 1 0 0 2 4 6 8 10 12 14 16 18 20 0 2 4 6 8 10 12 14 16 18 20 IK (mA) IK (mA) Reference voltage supply voltage fluctuation Reference voltage cathode current fluctuation 6 VK = VREF IK = 10 mA 2 4 0 3 −2 2 −4 −6 −8 0 −1 −2 −12 −3 −14 −4 4 6 8 10 12 −5 14 VCC (V) 4 1 −10 −16 1.5 2 VCC = 1.8 V VK = VREF 5 ∆VREF (mV) ∆VREF (mV) 4 0 2 4 6 8 10 12 IK (mA) SFF00002CEB 14 16 18 20 AN1433SSM ■ Application Notes (continued) 2. Main Characteristics (continued) VREF temperature characteristic Cathode saturation voltage 1.26 1.258 200 1.256 180 160 1.254 140 1.252 VKsat (mV) VREF (V) VCC = 1.8 V VREF = 1.3 V 1.25 1.248 1.246 120 100 80 60 1.244 40 1.242 20 1.24 −50 0 0 50 100 150 0 Temp. (°C) 2 4 6 8 10 12 14 16 18 20 IK (mA) Minimum cathode current VCC = 1.8 V 0 −10 ∆VREF (mV) −20 −30 −40 −50 −60 −70 −80 −90 −100 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 IK (µA) SFF00002CEB 5 AN1433SSM ■ Application Circuit Example This circuit amplifies the error voltage of the secondary side output voltage in the insulation type switching power supply, then transfers it to the primary side via a photocoupler. Replaceable with the conventional products (AN1431M, AN1431T, AN1432MS). (Primary side) (Secondary side) EO (+) VREF AN1433SSM VCC 0.01 µF EO (−) Primary side to control IC Note) As VCC and cathode pin are separated, VK can operate till 0.15 Vmax (at IK = 10 mA) at least. ■ New Package Dimensions (Unit: mm) • SSMINI-5DA (Lead-free package) 0.20 0.20+0.10 -0.05 4 0.20 1.60±0.10 1.20±0.10 5 0.10 M 1 2 3 0.50 0.50 0.60 max. 0 to 0.10 0.08+0.10 -0.05 1.00±0.10 1.60±0.10 0.10 1 2 5 6 Seating plane 3 4 SFF00002CEB Request for your special attention and precautions in using the technical information and semiconductors described in this material (1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. (2) The technical information described in this material is limited to showing representative characteristics and applied circuit examples of the products. It does not constitute the warranting of industrial property, the granting of relative rights, or the granting of any license. (3) The products described in this material are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: • Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. • Any applications other than the standard applications intended. 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Panasonic is endeavoring to continually improve the quality and reliability of these materials but there is always the possibility that further rectifications will be required in the future. Therefore, Panasonic will not assume any liability for any damages arising from any errors etc. that may appear in this material. C. These materials are solely intended for a customer's individual use. Therefore, without the prior written approval of Panasonic, any other use such as reproducing, selling, or distributing this material to a third party, via the Internet or in any other way, is prohibited. 2001 MAR