SC1566I5M1.8TRT Semtech

SC1566 Very Low Dropout 3.0 Amp Regulator With Enable POWER MANAGEMENT Description Features The SC1566 is a high performance positive voltage 350mV dropout 3A regulator designed for use in applications requiring very Adjustable output from 1.2V to 4.8V low dropout voltage at up to 3 Amps. Since it has 2.5V and 1.8V options (5 pin parts also adjustable superior dropout characteristics compared to regular externally 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 Enable pin allowing heat sink size reduction or elimination. 10A quiescent current in shutdown Additionally, the five pin versions of SC1566 have an Low reverse leakage (output to input) enable pin, to further reduce power dissipation while shut Full industrial temperature range down. The SC1566 provides excellent regulation over TO-220 and TO-263 packages variations in line, load and temperature. Applications The SC1566 is available as three terminal fixed output voltage and five terminal fixed or adjustable output Battery powered systems voltage devices with enable. Two package options are Motherboards and notebook computers available: TO-263 and TO-220. Peripheral cards Network cards Set top boxes (1)(2) Typical Application Circuits Medical equipment U1 SC1566I5T-2.5 1 5 VIN VIN VO VO = See equation below 2 4 ENABLE EN ADJ GND R1 3 1.200 (R1+ R2) VO = Volts R2 C1 C2 R2 U1 SC1566I5T-2.5 1 5 VIN VIN VO VO = 2.5V 2 4 ENABLE EN ADJ GND C1 C2 3 U1 SC1566IT-1.8 1 3 VIN VO = 1.8V VIN VO GND Notes: C1 C2 (1) Maximum VO setpoint for 1.8V parts = 5.4V 2 (2) This device is designed to operate with ceramic input and output capacitors Revision: April 27, 2005 1 www.semtech.comSC1566 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 TO-263-X 60 C/W JA TO-220-X 50 Thermal Resistance Junction to Case TO-263-X 3 C/W JC TO-220-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 2Vk ESD Electrical Characteristics Unless specified: V = V . Adjustable Option (V > V ): V = 2.2V to 5.5V and I = 10A to 3A. EN IN ADJ TH(ADJ) IN O Fixed Options (V = GND): V = (V + 0.7V) to 5.5V and I = 0A to 3A. 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 (Internal Fixed Voltage) -%2% +2 (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=110mA 5 mV D O 10 I=5500mA 701V0 m O 150 2005 Semtech Corp. 2 www.semtech.com