AP78L05/08/12 AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS Description Pin Assignments The AP78LXX Series is a three terminal positive regulator (Bottom View) available with fixed output voltages from 5V, 8V and 12V, V V GND IN making them useful in a wide range of applications. When OUT used as a Zener diode/resistor combination replacement, the AP78LXX can improve output impedance by two orders of magnitude, and lower quiescent current. These regulators can provide local on card regulation, eliminating the distribution problems associated with single point regulation. The voltages available allow the AP78LXX s to be used in TO92 logic systems. Instrumentation, HiFi and other solid state electronic equipment. (Top View) The AP78LXX is available in the plastic TO92, SOT89 and V 1 8 V OUT IN SO-8 using industrial standard package technology. The regulator can deliver 100mA output current with adequate GND 2 7 GND heat sinking. Current limiting is included to limit the peak GND 3 6 GND output current to a safe value. Safe area protection for the output transistors is provided to limit internal power NC 4 5 NC dissipation. Thermal overload protection is integrated to prevent the IC from overheat due to abnormal condition. SO-8 (Top View) Features Output voltages of 5.0V, 8.0V, 12V Output voltage tolerances of 5% over the operating temperature ranges Output current in excess of 100mA 12 3 Internal thermal overload protection V V GND IN OUT Output transistor safe area protection Internal short circuit current limiting SOT89 No external components Available in plastic TO92, SOT89 and plastic SO-8 low Applications profile packages Lead Free Package: TO92 (Note 1) Communication SO-8 and SOT89: Available in Green Molding CD-ROM Compound (No Br, Sb) (Note 2) DVD-Player Lead Free Finish / RoHS Compliant (Note 3) Set-Top Box Notes: 1. TO92 is available in Lead Free product only. 2. SO-8 and SOT89 are available in Green products only. 3. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2). All applicable RoHS exemptions applied. 1 of 16 March 2012 AP78L05/08/12 Diodes Incorporated www.diodes.com Document number: DS31054 Rev. 10 - 2 AP78L05/08/12 AP78LXX SERIES 3-TERMINAL POSITIVE REGULATORS Typical Application Circuit Fixed Output Regulator IN OUT Input Output AP78Lxx C1 C2 GND 0.33F 0.1F () Required if the regulator is located more than 3 from the power supply filter () See Note 5 in the electrical characteristics table Pin Descriptions Pin Name Description V Operating Voltage Input IN V Voltage Output Pin OUT GND Ground NC No Connection Functional Block Diagram Introduction The AP78LXX series is a three terminal device with fixed output voltages from 5V,8V and 12V. The AP78LXX fixed voltage regulator series has built-in thermal overload protection which prevents the device from being damaged due to excessive junction temperature. The regulator also contains internal short-circuit protection which limits the maximum output current, and safe-area protection for the pass transistor which reduces the short-circuit current as the voltage across the pass transistor is increased. 2 of 16 March 2012 AP78L05/08/12 Diodes Incorporated www.diodes.com Document number: DS31054 Rev. 10 - 2