TC1108-2.8VDBTR Microchip

TC1108 300mA CMOS LDO Features General Description Extremely Low Supply Current (50A, Typ.) The TC1108 is a fixed output, high accuracy (typically 0.5%) CMOS low dropout regulator. Total supply Very Low Dropout Voltage current is typically 50 A at full load (20 to 60 times 300mA Output Current lower than in bipolar regulators). High Output Voltage Accuracy TC1108 key features include ultra low noise operation, Standard or Custom Output Voltages very low dropout voltage (typically 240mV at full load), Over Current and Over Temperature Protection and fast response to step changes in load. The TC1108 incorporates both over temperature and Applications over current protection. The TC1108 is stable with an Battery Operated Systems output capacitor of only 1 F and has a maximum Portable Computers output current of 300mA. It is available in a SOT-223 package. Medical Instruments Instrumentation Typical Application Cellular/GSM/PHS Phones Linear Post-Regulators for SMPS 1 3 V V V V Pagers IN IN OUT OUT + C1 Device Selection Table 1F TC1108 Junction 2 Part Number Package Temp. Range GND TC1108-xxVDB 3-Pin SOT-223 -40C to +125C NOTE: xx indicates output voltages Available Output Voltages: 2.5, 2.8, 3.0, 3.3, 5.0. Other output voltages are available. Please contact Microchip Technology Inc. for details. Package Type SOT-223 TC1108VDB 1 2 3 V GND V IN OUT 2002-2012 Microchip Technology Inc. DS21357C-page 1TC1108 Stresses above those listed underAbsolute Maximum 1.0 ELECTRICAL Rating may cause permanent damage to the device. These CHARACTERISTICS are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the Absolute Maximum Ratings* operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for Input Voltage .........................................................6.5V extended periods may affect device reliability. Output Voltage.................. (V 0.3V) to (V + 0.3V) SS IN Power Dissipation................Internally Limited (Note 6) Maximum Voltage on Any Pin ........V +0.3V to -0.3V IN Operating Temperature Range...... -40C < T < 125C J Storage Temperature..........................-65C to +150C TC1108 ELECTRICAL SPECIFICATIONS Electrical Characteristics: V = V + 1V, I = 100 A, C = 3.3 F, T = 25C, unless otherwise noted. Boldface type IN OUT L L A specifications apply for junction temperatures of -40C to +125C. Symbol Parameter Min Typ Max Units Test Conditions V Input Operating Voltage 2.7 6.0 V Note 7 IN I Maximum Output Current 300 mA OUTMAX V Output Voltage V 0.5% V Note 1 OUT R V 2.5% V + 2.5% R R V /TV Temperature Coefficient 40 ppm/C Note 2 OUT OUT V /V Line Regulation 0.05 0.35 %(V + 1V) V 6V OUT IN R IN V /V Load Regulation 0.5 2.0 %I = 0.1mA to I (Note 3) OUT OUT L OUTMAX V -V Dropout Voltage 20 30 mV I = 0.1mA IN OUT L 80 160 I = 100mA L 240 480 I = 300mA (Note 4) L I Supply Current 50 90 A DD PSRR Power Supply Rejection Ratio 60 dB F 1kHz RE I Output Short Circuit Current 550 650 mA V = 0V OUTSC OUT V /P Thermal Regulation 0.04 V/W Note 5 OUT D eN Output Noise 260 nV/ Hz F = 10kHz, C = 1 F, OUT R = 50 LOAD Note 1: V is the regulator output voltage setting. R 6 2: TC V = (V V ) x 10 OUT OUTMAX OUTMIN V x T OUT 3: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range from 0.1mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal regulation specification. 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at a 1V differential. 5: Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a current pulse equal to I at V = 6V for T = 10 msec. LMAX IN 6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction-to-air (i.e., T , T , ). Exceeding the maximum allowable power dissipation causes the device to initiate A J JA thermal shutdown. Please see Section 4.0 Thermal Considerations for more details. 7: The minimum V has to justify the conditions: V V + V and V 2.7V for I = 0.1mA to I . IN IN R DROPOUT IN L OUTMAX DS21357C-page 2 2002-2012 Microchip Technology Inc.