CAT6221-JGTD-GT3 ON Semiconductor

CAT6221 300 mA CMOS Dual LDO Regulator Description The 300 mA CMOS Dual LDO CAT6221 combines in a single TSOT23 6lead package two low dropout regulators (LDO), each CAT6221 VIN VOUT1 V IN EN1 LDO1 V OUT1 EN1 Shutdown Reference Switch VIN VIN VOUT1 VOUT1 2.3 V to 5.5 V C C IN OUT1 VOUT2 CAT6221 1 F 1 F LDO2 EN2 V OUT2 OFF ON EN1 VOUT2 EN2 VOUT2 OFF EN2 ON GND Shutdown C OUT2 Switch 1 F GND Figure 1. Typical Application Circuit Figure 2. CAT6221 Functional Block Diagram Pin Function VIN is the supply pin for the LDO. A small 1 F ceramic pins and ground. For better transient response, its value can bypass capacitor is required between the V pin and ground be increased to 4.7 F. IN near the device. When using longer connections to the power The capacitor should be located near the device. For the supply, C value can be increased without limit. The TSOT23 6lead package, a continuous 300 mA output IN operating input voltage range is from 2.3 V to 5.5 V. current for both LDOs may turnon the thermal protection. On each output, a 250  internal shutdown switch EN1 & 2 are the enable control logic (active high) for the discharges the output capacitor in the noload condition. regulator outputs. GND is the ground reference for the LDO. The pin must be VOUT1 & 2 are the LDO regulator outputs. A small 1F connected to the ground plane on the PCB. ceramic bypass capacitor is required between the VOUT Table 1. ABSOLUTE MAXIMUM RATINGS Parameter Rating Unit V 0 to 6.5 V IN V , V 0.3 to V + 0.3 V EN OUT IN Junction Temperature, T +150 C J Power Dissipation, P Internally Limited (Note 1) mW D Storage Temperature Range, T 65 to +150 C S Lead Temperature (soldering, 5 sec.) 260 C ESD Rating (Human Body Model) 3 kV Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Table 2. RECOMMENDED OPERATING CONDITIONS (Note 2) Parameter Range Unit V 2.3 to 5.5 V IN V 0 to V V EN IN Junction Temperature Range, T 40 to +125 C J Package Thermal Resistance (TSOT23), 235 C/W JA NOTE: Typical application circuit with external components is shown above. 1. The maximum allowable power dissipation at any T (ambient temperature) is P = (T T )/ . Exceeding the maximum allowable A Dmax Jmax A JA power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. 2. The device is not guaranteed to work outside its operating rating.