TC1263 500 mA, Fixed-Output, CMOS LDO with Shutdown Features Description Very Low Dropout Voltage The TC1263 is a fixed-output, high-accuracy (typically 0.5%) CMOS low dropout regulator. Designed 500 mA Output Current specifically for battery-operated systems, the TC1263s 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 SHDN Input for Active Power Management in bipolar regulators). ERROR Output Can Be Used as a Low Battery TC1263 key features include ultra low noise operation, Detector (SOIC only) very low dropout voltage (typically 350 mV at full load) and fast response to step changes in load. Applications The TC1263 incorporates both overtemperature and overcurrent protection. The TC1263 is stable with an Battery-Operated Systems output capacitor of only 1F and has a maximum Portable Computers output current of 500 mA. It is available in 8-Pin SOIC, Medical Instruments 5-Pin TO-220 and 5-Pin DDPAK packages. Instrumentation Cellular/GSM/PHS Phones Package Type Linear Post-Regulators for SMPS 5-Pin DDPAK 5-Pin TO-220 Pagers Front View Tab is GND Tab is GND Typical Application TC1263 TC1263 V V V V OUT OUT IN IN + C 1 1F TC1263 12 3 45 3 5 12 4 GND SHDN SHDN 8-Pin SOIC V V 1 8 OUT IN GND 2 7 NC TC1263 SHDN NC 3 6 BYPASS 5 4 ERROR 2002-2012 Microchip Technology Inc. DS21374D-page 1 BYP SHDN GND V IN V OUT BYP SHDN GND V IN V OUTTC1263 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................ (GND 0.3V) to (V + 0.3V) IN Power Dissipation................Internally Limited (Note 7) Voltage (max.) on Any Pin: (GND 0.3V) to (V + 0.3V) IN Operating Temperature Range.... -40C < T < +125C J Storage Temperature..........................-65C to +150C DC CHARACTERISTICS Electrical Specifications: Unless otherwise indicated, V = V + 1.0V, (Note 1), I = 100 A, C = 3.3 F, IN R L L SHDN > V , T = +25C. Boldface type specifications apply for junction temperatures of -40C to +125C. IH A Parameters Sym Min Typ Max Units Conditions Input Operating Voltage V 2.7 6.0 V Note 2 IN Maximum Output Current I 500 mA OUTMAX Output Voltage V V 2.5% V 0.5% V + 2.5% V Note 1 OUT R R R V Temperature Coefficient V /T 40 ppm/C Note 3 OUT OUT Line Regulation V / V 0.05 0.35 %(V + 1V) V 6V OUT IN R IN Load Regulation (Note 4) V /V 0.01 0.002 +0.01 %/mA I = 0.1 mA to I OUT OUT L OUTMAX Dropout Voltage (Note 5) V -V 20 30 mV I = 100 A IN OUT L 60 130 I = 100 mA L 200 390 I = 300 mA L 350 650 I = 500 mA L Supply Current I 80 130 A SHDN = V , I = 0 DD IH L Shutdown Supply Current I 0.05 1 A SHDN = 0V SHDN Power Supply Rejection Ratio PSRR 64 db F 1kHz Output Short Circuit Current I 1200 1400 mA V = 0V OUTSC OUT Thermal Regulation V / P 0.04 V/W Note 6 OUT D Output Noise eN 260 nV/ Hz I = I , F = 10 kHZ L OUTMAX 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 6 3: V V 10 OUTMAX OUTMIN TCV = ------------------------------------------------------------------------- OUT V T OUT 4: 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. 5: Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at a 1.0V differential. 6: 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 7: 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. DS21374D-page 2 2002-2012 Microchip Technology Inc.