TC1264-3.3VDB Microchip

TC1264 800 mA Fixed-Output CMOS LDO with Shutdown Features: Description: Very Low Dropout Voltage The TC1264 is a fixed-output, high-accuracy (typically 0.5%) CMOS low dropout regulator. Designed 800 mA Output Current specifically for battery-operated systems, the TC1264s High Output Voltage Accuracy CMOS construction eliminates wasted ground current, Standard or Custom Output Voltages significantly extending battery life. Total supply current Overcurrent and Overtemperature Protection is typically 80 A at full load (20 to 60 times lower than in bipolar regulators). Applications: TC1264 key features include ultra low noise operation, very low dropout voltage (typically 450 mV at full load), Battery Operated Systems and fast response to step changes in load. Portable Computers The TC1264 incorporates both over temperature and Medical Instruments over current protection. The TC1264 is stable with an Instrumentation output capacitor of only 1F and has a maximum Cellular/GSM/PHS Phones output current of 800mA. It is available in 3-pin Linear Post-Regulators for SMPS SOT-223, 3-pin TO-220 and 3-pin DDPAK packages. Pagers Package Type Typical Application 3-Pin DDPAK 3-Pin TO-220 FRONT VIEW V V V V OUT OUT IN IN TAB IS GND + C 1 1F TC1264 TC1264 TC1264 GND 12 3 12 3 3-Pin SOT-223 FRONT VIEW V 3 OUT 2 GND 1 V IN TC1264 2010 Microchip Technology Inc. DS21375D-page 1 V IN GND V OUT TAB IS GND V IN GND V OUTTC1264 Notice: Stresses above those listed underMaximum 1.0 ELECTRICAL Rating may cause permanent damage to the device. This is CHARACTERISTICS a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure Absolute Maximum Ratings to maximum rating conditions for extended periods may affect Input Voltage .........................................................6.5V device reliability. Output Voltage.................. (V 0.3V) to (V + 0.3V) SS IN Power Dissipation................Internally Limited (Note 8) Maximum Voltage on Any Pin ........V +0.3V to -0.3V IN Operating Temperature Range...... -40C < T < 125C J Storage Temperature..........................-65C to +150C DC CHARACTERISTICS Electrical Specifications: Unless otherwise indicated, V = V + 1.5V, (Note 1), I = 100 A, C = 3.3 F, SHDN > V , IN R L L IH T = +25C. Boldface type specifications apply for junction temperatures of -40C to +125C. A Parameters Sym Min Typ Max Units Conditions Input Operating Voltage V 2.7 6.0 V Note 2 IN Maximum Output Current I 800 mA OUTMAX Output Voltage V V 2.5% V 0.5% V + 2.5% VV 2.5V OUT R R R R V 2% V 0.5% V + 3% V = 1.8V R R R R V 7% V + 3% I = 0.1 mA to 800 mA R R L (Note 3) V Temperature Coefficient V /T 40 ppm/C Note 4 OUT OUT Line Regulation V / V 0.007 0.35 %(V + 1V) V 6V OUT IN R IN Load Regulation (Note 5) V /V -0.01 0.002 0 %/mA I = 0.1 mA to I OUT OUT L OUTMAX Dropout Voltage (Note 6) V V 20 30 mV V 2.5V, I = 100 A IN OUT R L 50 160 V 2.5V, I = 100 mA R L 150 480 2.5V, I = 300 mA V R L 260 800 2.5V, I = 500 mA V R L 450 1300 2.5V, I = 800 mA V R L 1000 1200 V = 1.8V, I = 500 mA R L 1200 1400 I = 800 mA L Supply Current I 80 130 A SHDN = V , I = 0 DD IH L Power Supply Rejection Ratio PSRR 64 db F 1kHz Output Short Circuit Current I 1200 mA V = 0V OUTSC OUT Note 1: V is the regulator output voltage setting. R 2: The minimum V has to justify the conditions: V V + V and V 2.7V for I = 0.1 mA to I . IN IN R DROPOUT IN L OUTMAX 3: This accuracy represents the worst-case over the entire output current and temperature range. 6 4: V V 10 OUTMAX OUTMIN TCV = ------------------------------------------------------------------------- OUT V T OUT 5: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range from 0.1 mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal regulation specification. 6: Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at a 1.5V differential. 7: 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 ms. LMAX IN 8: 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 A J JA dissipation causes the device to initiate thermal shutdown. Please see Section 5.0 Thermal Considerations for more details. DS21375D-page 2 2010 Microchip Technology Inc.