SC1565 Very Low Dropout 1.5 Amp Regulator With Enable POWER MANAGEMENT Description Features The SC1565 is a high performance positive voltage 350mV dropout 1.5A (1) regulator designed for use in applications requiring very Adjustable output from 1.2V to 4.8V low dropout voltage at up to 1.5 Amps. Since it has 2.5V and 1.8V options (adjustable externally superior dropout characteristics compared to regular (1) using resistors) LDOs, it can be used to supply 2.5V on motherboards or Over current and over temperature protection 2.8V on peripheral cards from the 3.3V supply thus (1) Enable pin allowing the elimination of costly heatsinks. Additionally, (1) 10A quiescent current in shutdown the 5-lead TO-220/TO-263 and SO-8 versions have an Low reverse leakage (output to input) enable pin to further reduce power dissipation while shut Surface mount and through-hole packages down. The SC1565 provides excellent regulation over Full industrial temperature range variations in line, load and temperature. TO-220, TO-263, SOT-223 and SO-8 Packages Note: The SC1565 is available in SO-8, 3-lead SOT-223, 3 and (1) SO-8, TO-220-5 and TO-263-5 packages only. 5 lead TO-220 and 3 and 5 lead TO-263 packages. Three lead packages are available with 1.8V and 2.5V fixed Applications output options only. The SO-8, TO-220-5 and TO-263-5 are available with 1.8V and 2.5V internally preset Battery powered systems outputs that are also adjustable using external resistors. Motherboards Peripheral cards Network cards Set Top Boxes Medical Equipment Notebook Computers Typical Application Circuits U1 1 8 ENABLE EN GND U1 2 7 VIN VIN GND 1 8 ENABLE EN GND 3 6 VO VO GND 2 7 VIN VIN GND 4 5 ADJ GND 3 6 VO VO GND R1 SC1565IS-X.X 4 5 ADJ GND C1 C2 SC1565IS-X.X C1 C2 R2 1.200 (R1 + R2) VO = Volts R2 1.200 (R1 + R2) VO = Volts U1 R2 SC1565I5T-X.X 2 4 VIN VO VIN VO 1 5 ENABLE EN ADJ GND U1 R1 SC1565IT-X.X 1 3 VIN VIN VO VO 3 C1 C2 GND C1 C2 R2 2 Notes: (1) Maximum VO setpoint for 1.8V parts = 5.4V. (2) This device is designed to operate with ceramic input and output capacitors. Revision: November 25, 2009 1 www.semtech.comSC1565 POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Parameter Sxymbol Msa Unit Input Voltage V 7V IN Power Dissipation PIWnternally Limited D Thermal Resistance Junction to Ambient (1) SO-8 65 C/W JA SOT-223 63 TO-220-X 50 TO-263-X 60 Thermal Resistance Junction to Case SO-8 39 C/W JC SOT-223 27 TO-220-X, TO-263-X 3 Operating Ambient Temperature Range T -C40 to +85 A Operating Junction Temperature Range T -C40 to +150 J Storage Temperature Range T -C65 to +150 STG Lead Temperature (Soldering) 10 Sec. T 3C00 LEAD ESD Rating (Human Body Model) V 4Vk ESD Note: (1) 1 square inch of FR-4, double sided, 1 oz. minimum copper weight. Electrical Characteristics Unless specified: V = V . Adjustable Option (V > V ): V = 2.2V to 5.5V and I = 10A to 1.5A. EN IN ADJ TH(ADJ) IN O Fixed Options (V = GND): V = (V + 0.7V) to 5.5V and I = 0A to 1.5A. Values in bold apply over the full operating temperature range. ADJ IN O O PlarameterSsymboTnest Condition Mpi Txy Msa Unit VIN SVupply Voltage Range 25.2 5. V IN QIuiescent Current V=53.3V 0.7 1.75 mA Q IN V = 5.5V, V=00V 1 35 A IN EN VO (1) Output Voltage V V = V + 0.7V, I=%10mA -V1 +V1% O IN O O O -%2% +2 (Internal Fixed Voltage) (1) Line Regulation REG V = (V + 0.25V) to 5.5V, I=510mA 0.03 0.3 % (LINE) IN O OUT (1) Load Regulation REG V = V+20.7V 0. 0.4 % (LOAD) IN O (1)(2) Dropout Voltage V I=510mA 20. 1Vm D O 20 I=0500mA 903V0 m O 400 2005 Semtech Corp. 2 www.semtech.com