TC1173-3.3VOA Microchip

TC1173 300mA CMOS LDO with Shutdown ERROR Output and Bypass Features General Description Extremely Low Supply Current for Longer Battery Life The TC1173 is a precision output (typically 0.5%) CMOS low dropout regulator. Total supply current is Very Low Dropout Voltage typically 50 A at full load (20 to 60 times lower than in 300mA Output Current bipolar regulators). Standard or Custom Output Voltages TC1173 key features include ultra low noise operation ERROR Output Can Be Used as a Low Battery (plus optional Bypass input) very low dropout voltage Detector or Processor Reset Generator (typically 240mV at full load) and internal feed-forward Power Saving Shutdown Mode compensation for fast response to step changes in Bypass Input for Ultra Quiet Operation load. An error output (ERROR) is asserted when the Over Current and Over Temperature Protection TC1173 is out-of-regulation (due to a low input voltage or excessive output current). ERROR can be set as a Space-Saving MSOP Package Option low battery warning or as a processor RESET signal Applications (with the addition of an external RC network). Supply current is reduced to 0.05A (typical) and VOUT and Battery Operated Systems ERROR fall to zero when the shutdown input is low. Portable Computers The TC1173 incorporates both over temperature and Medical Instruments over current protection. The TC1173 is stable with an Instrumentation output capacitor of only 1 F and has a maximum Cellular/GSM/PHS Phones output current of 300mA. Linear Post-Regulators for SMPS Typical Application Pagers 1 8 V V V V OUT OUT IN IN Device Selection Table + C1 1F 2 7 Junction GND NC Part Number Package Temp. Range R3 TC1173 1M TC1173-xxVOA 8-Pin SOIC -40C to +125C 3 6 NC SHDN TC1173-xxVUA 8-Pin MSOP -40C to +125C 45 NOTE: xx indicates output voltages Bypass ERROR ERROR Available Output Voltages: 2.5, 2.8, 3.0, 3.3, 5.0. C BYPASS Other output voltages are available. Please contact Microchip 470pF (Optional) Technology Inc. for details. Shutdown Control (from Power Control Logic) Package Type 8-Pin MSOP 8-Pin SOIC V 1 8 V OUT IN V 1 8 V OUT IN 2 7 GND NC TC1173VUA GND 2 7 NC 3 6 SHDN NC TC1173VOA 4 5 NC 3 6 Bypass ERROR SHDN Bypass 4 5 ERROR 2002-2012 Microchip Technology Inc. DS21362C-page 1TC1173 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 TC1173 ELECTRICAL SPECIFICATIONS Electrical Characteristics: V = V + 1V, I = 0.1mA, 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 2.7 6.0 V Note 8 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 SHDN = V SS1 IH, I Shutdown Supply Current 0.05 0.5 A SHDN = 0V SS2 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 = 1kHz, C = 1 F, OUT R = 50 LOAD SHDN Input V SHDN Input High Threshold 45 %V IH IN V SHDN Input Low Threshold 15 %V IL IN ERROR Output V Minimum Operating Voltage 1.0 V MIN V Output Logic Low Voltage 400 mV 1 mA Flows to ERROR OL V ERROR Threshold Voltage 0.95 x V V TH R V ERROR Positive Hysteresis 50 mV Note 7 OL Note 1: V is the user-programmed 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 regula- tion 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: Hysteresis voltage is referenced by V . R 8: 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 DS21362C-page 2 2002-2012 Microchip Technology Inc.