TC1269 300mA CMOS LDO with Shutdown and V Bypass REF Features General Description Very Low Ground Current for Longer Battery Life The TC1269 is a fixed output, high accuracy (typically 0.5%) CMOS upgrade for older (bipolar) low dropout Very Low Dropout Voltage regulators. Total supply current is typically 50 A at full 300mA Output Circuit load (20 to 60 times lower than in bipolar regulators). High Output Voltage Accuracy TC1269 key features include ultra low noise operation Standard or Custom Output Voltages (plus optional Bypass input) very low dropout voltage Power Saving Shutdown Mode (typically 240mV at full load), and fast response to step Bypass Input for Ultra Quiet Operation changes in load. Supply current is reduced to 0.05 A Over Current and Over Temperature Protection (typical) and V falls to zero when the shutdown OUT input is low. Space-Saving MSOP Package The TC1269 incorporates both over temperature and Applications over current protection. The TC1269 is stable with an output capacitor of only 1 F and has a maximum Battery Operated Systems output current of 300mA. Portable Computers Medical Instruments Typical Application Instrumentation 1 8 Cellular/GSM/PHS Phones V V V V OUT IN OUT IN + C1 Linear Post-Regulator for SMPS 1F 7 2 Pagers SHDN NC Shutdown Control Digital Cameras (from Power TC1269 Control Logic) Device Selection Table 6 3 NC NC Output* 4 Junction GND Bypass C BYPASS Part Number Voltage Package Temp. Range 470pF (V) (Optional) TC1269-2.5VUA 2.5 8-Pin MSOP -40C to +125C TC1269-2.8VUA 2.8 8-Pin MSOP -40C to +125C TC1269-3.0VUA 3.0 8-Pin MSOP -40C to +125C TC1269-3.3VUA 3.3 8-Pin MSOP -40C to +125C TC1269-5.0VUA 5.0 8-Pin MSOP -40C to +125C *Other output voltages are available. Please contact Microchip Technology Inc. for details. Package Type 8-Pin MSOP V 1 8 V OUT IN 2 7 NC SHDN TC1269 3 6 NC NC GND45 Bypass 2002-2012 Microchip Technology Inc. DS21380C-page 1TC1269 *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 0.3) to (V + 0.3V) SS IN Maximum Voltage on Any Pin ........V +0.3V to -0.3V IN Power Dissipation................Internally Limited (Note 6) Operating Temperature ............... -40C < T < +125C J Storage Temperature..........................-65C to +150C TC1269 ELECTRICAL SPECIFICATIONS Electrical Characteristics: V = V + 1V, I = 0.1 A, C = 3.3 F, SHDN > V , T = 25C, unless otherwise noted. Boldface IN OUT L L IH A type specifications apply for junction temperatures of -40C to +125C. Symbol Parameter Min Typ Max Units Test Conditions V Input Operating Voltage 6.0 V 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 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 SHDN = V SS1 IH I Shutdown Supply Current 0.05 0.5 A SHDN = 0V SS2 PSRR Power Supply Rejection Ratio 50 dB F 120Hz 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 = 1kHz, C = 1 F, R = 50 OUT LOAD SHDN Input V SHDN Input High Threshold 45 %V IH IN V SHDN Input Low Threshold 15 %V IL IN Note 1: V is the regulator output voltage setting. R 6 2: T V = (V V ) x 10 C 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 specifica- tion. 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 differen- tial. 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. DS21380C-page 2 2002-2012 Microchip Technology Inc.