DISCRETE SEMICONDUCTORS DATA SHEET k, halfpage MBD127 PSSI2021SAY Constant current source Product specification 2001 May 07 Philips Semiconductors Product specification Constant current source PSSI2021SAY FEATURES PINNING • One chip constant current source PIN • Reduced number of components and board space. SYMBOL DESCRIPTION 1 n.c. not connected 2 Istab/Vout stabilized current/output voltage APPLICATIONS 3 GND ground • Especially suitable for space reduction in, for example, LED driving circuits or active bias controlling. 4 Rexternal external resistor 5 VS supply voltage DESCRIPTION Resistor equipped PNP transistor with two diodes on one chip in a plastic SC-88A package. Built-in bias resistor and two diodes allow operation as constant current source. The stabilized current can be adjusted between 15 µA and 50 mA by connection of external resistors between pins 4 and 5. 5 handbook, halfpage 1 2 4 5 3 1 n.c. Top view MARKING TYPE NUMBER MARKING CODE PSSI2021SAY 4 2 3 MGU348 Fig.1 Simplified outline (SC-88A) and symbol. S1p LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 60134). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VS supply voltage − 75 V Vout output voltage VS = 75 V − 73 V VR reverse voltage between all terminals − 0.5 V Istab continuous stabilized current (DC) − 50 mA Ptot total power dissipation Tamb ≤ 25 °C; note 1 − 335 mW Tstg storage temperature −65 +150 °C Tj junction temperature − 150 °C Tamb operating ambient temperature −65 +150 °C Note 1. Device mounted on a FR4 printed-circuit board. 2001 May 07 2 Philips Semiconductors Product specification Constant current source PSSI2021SAY THERMAL CHARACTERISTICS SYMBOL Rth j-a PARAMETER thermal resistance from junction to ambient CONDITIONS in free air; note 1 VALUE UNIT 370 K/W Note 1. Device mounted on a FR4 printed-circuit board. CHARACTERISTICS Tamb = 25 °C unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Istab stabilized current VS = 12 V; Vout = 0 to 10 V; Rexternal = infinity 10 15 20 µA Isupply supply current VS = 12 V; Vout = 0 to 10 V; Istab = 15 µA − 240 370 µA VS = 75 V; Vout = 0 V; Istab = 15 µA − 1.5 2.2 mA stability of stabilized current as a function of Vcontrol Vout = 1 to 10 V; VS = 12 V; Tamb = 25 °C − 0.5 1 % stability of stabilized current as a function of temperature Vout = 1 V; VS = 12 V; Tamb = −55 to +150 °C − 0.15 0.3 % ∆I stab --------------I stab ∆I stab ------------------------∆T × I stab 2001 May 07 3 Philips Semiconductors Product specification Constant current source PSSI2021SAY PACKAGE OUTLINE Plastic surface mounted package; 5 leads SOT353 D E B y X A HE 5 v M A 4 Q A A1 1 2 e1 3 bp c Lp w M B e detail X 0 1 2 mm scale DIMENSIONS (mm are the original dimensions) UNIT A A1 max bp c D E (2) e e1 HE Lp Q v w y mm 1.1 0.8 0.1 0.30 0.20 0.25 0.10 2.2 1.8 1.35 1.15 1.3 0.65 2.2 2.0 0.45 0.15 0.25 0.15 0.2 0.2 0.1 OUTLINE VERSION SOT353 2001 May 07 REFERENCES IEC JEDEC EIAJ SC-88A 4 EUROPEAN PROJECTION ISSUE DATE 97-02-28 Philips Semiconductors Product specification Constant current source PSSI2021SAY DATA SHEET STATUS DATA SHEET STATUS(1) PRODUCT STATUS(2) DEFINITIONS Objective data Development This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. Preliminary data Qualification This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. Product data Production This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Changes will be communicated according to the Customer Product/Process Change Notification (CPCN) procedure SNW-SQ-650A. Notes 1. Please consult the most recently issued data sheet before initiating or completing a design. 2. The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com. DEFINITIONS DISCLAIMERS Short-form specification The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Life support applications These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Limiting values definition Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Right to make changes Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Application information Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. 2001 May 07 5 Philips Semiconductors Product specification Constant current source PSSI2021SAY NOTES 2001 May 07 6 Philips Semiconductors Product specification Constant current source PSSI2021SAY NOTES 2001 May 07 7 Philips Semiconductors – a worldwide company Argentina: see South America Australia: 3 Figtree Drive, HOMEBUSH, NSW 2140, Tel. +61 2 9704 8141, Fax. +61 2 9704 8139 Austria: Computerstr. 6, A-1101 WIEN, P.O. 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