IRU1208

Data Sheet No. PD94134 IRU1206 / IRU1207 / IRU1208 / IRU1209 1A VERY LOW DROPOUT POSITIVE FIXED AND ADJUSTABLE REGULATORS DESCRIPTION The IRU1206 family of devices are ultra low dropout 1A regulators using PNP transistor as the pass element. These products are ideal when a single input supply is only available and the dropout voltage is less than 1V, exceeding the minimum dropout characteristics of NPN/ PNP hybrid regulators. One common application of these regulators is where input is 3.3V and a 2.5V output is needed. Besides the low dropout of less than 0.5V, other features of the family of the parts are: micro-power shutdown capability and output UVLO detection where Flag pin is switched low when output is below 5% of its nominal point. FEATURES Low Dropout Voltage (500mV at 1A) 1% Voltage Reference Accuracy Low Ground Current 1m A Maximum Quiescent Current in Shutdown (IRU1207, IRU1208) Fast Transient Response Current Limit and Thermal Shutdown Error Flag Signal for Output out of Regulation (IRU1207, IRU1208) APPLICATIONS 2.5V Supply from 3.3V Input for the new generation of Logic ICs Computer Mother Board, Add-On Cards High Efficiency Post Regulator in Switch Mode Power Supply (SMPS) TYPICAL APPLICATION VOUT 3 C2 VOUT IRU1206XX Gnd 2 VIN 1 VIN C1 Figure 1 - Typical application of the 1206-XX in a 3-Pin SOT-223 package. PACKAGE ORDER INFORMATION TJ (°C) 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 0 To 125 Rev. 2.3 08/02/02 2-PIN TO-252 3-PI...