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## BAXXJC5 Datasheet(Fiches technique) 5 Page - Rohm

 Numéro de pièce BAXXJC5 Description 1.5A Secondary LDO Regulators for Local Power Supplies Télécharger 10 Pages Scroll/Zoom 100% Fabricant ROHM [Rohm] Site Internet http://www.rohm.com Logo

 5 page BA□□JC5 Series,BA00JC5W SeriesTechnical Note5/9www.rohm.com2009.04 - Rev.A© 2009 ROHM Co., Ltd. All rights reserved.Thermal Derating Curve TO220FP-3/TO220FP-5/TO220FP-5 (V5）Fig.17The characteristics of the IC are greatly influenced by the operating temperature. If the temperature exceeds the maximumjunction temperature Tjmax, deterioration or damage may occur. Implement proper thermal designs to ensure that powerdissipation is within the permissible range in order to prevent instantaneous damage resulting from heat and maintain thereliability of the IC for long-term operation.The following method is used to calculate the power consumption Pc (W):Pc = (Vcc – Vo) Io + Vcc  IccaPower dissipation Pd ≥ PcThe load current Io is calculated:Calculation Example:Vcc = 6.0V and Vo = 5.0V at Ta = 85℃Refer to the above and implement proper thermal designs so that the IC will not be used under excessive power dissipationconditions under the entire operating temperature range.The power consumption Pc of the IC in the event of shorting (i.e. the Vo and GND pins are shorted) can be obtained from thefollowing equation: Pc = Vcc (Icca + Ishort) (Ishort: short current)01525201052550751251501000AMBIENT TEMPERATURE：Ta [°C](1)20.0(2)2.0(2) During IC without heat sink operation.j-a = 62.5 (°C/W)(1) When using an infinite heat sink.j-c = 6.25 (°C/W)ja = 62.5°C/W  −16.0mW/°C25°C = 2000mW 85°C = 1040mWVcc : Input voltageVo: Output currentIO: Load currentIcca : Circuit currentIo ≤Pd − Vcc IccaVcc − Vo1.040 − 6.0 Icca6.0 − 5.0Io ≤ 860mA (Icca 30mA)