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TC1268 Datasheet(PDF) 2 Page - Microchip Technology |
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TC1268 Datasheet(HTML) 2 Page - Microchip Technology |
2 / 12 page TC1268 DS21379B-page 2 © 2002 Microchip Technology Inc. 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings* Input Voltage .........................................................6.5V Power Dissipation................Internally Limited (Note 6) Maximum Voltage on Any Pin ........ VIN +0.3V to -0.3V Operating Temperature ............... -40°C < TJ < +125°C Storage Temperature.......................... -65°C to +150°C *Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. TC1268 ELECTRICAL SPECIFICATIONS Electrical Characteristics: VIN =VOUT +1V, IL =100µA, CL =3.3µF, SHDN >VIH,TA = 25°C, unless otherwise noted. Boldface type specifications apply for junction temperatures of -40°C to +125°C. Symbol Parameter Min Typ Max Units Test Conditions VIN Input Operating Voltage 2.7 — 6.0 V Note 8 IOUTMAX Maximum Output Current 500 —— mA VOUT Output Voltage — VR –2.5% VR ±0.5% — — VR +2.5% V Note 1 ∆V OUT/∆TVOUT Temperature Coefficient — 40 — ppm/°C Note 2 ∆V OUT/∆VIN Line Regulation — 0.05 0.35 %(VR +1V) ≤ VIN ≤ 6V ∆VOUT/VOUT Load Regulation — 0.002 0.01 %/mA IL = 0.1mA to IOUTMAX (Note 3) VIN-VOUT Dropout Voltage — — — — 20 60 200 350 30 160 480 800 mV IL =100µA IL =100mA IL =300mA IL =500mA (Note 4) IDD Supply Current (Active Mode) — 80 130 µASHDN =VIH,IL =0 ISHDN Supply Current (Shutdown Mode) — 5 — µASHDN =0V TWK Wake-up Time (from Shutdown Mode) —5 10 µsec VIN =3.5V, VOUT =2.5V CIN =COUT =1µF IL = 250mA (See Figure 3-2) TS Settling Time (from Shutdown Mode) —15 — µsec VIN =3.5V, VOUT =2.5V CIN =COUT =1µF IL = 250mA (See Figure 3-2) PSRR Power Supply Rejection Ratio — 64 — dB FRE ≤ 1kHz IOUTSC Output Short Circuit Current — 1200 1400 mA VOUT =0V ∆VOUT/∆PD Thermal Regulation — 0.04 — V/W Note 5 eN Output Noise — 260 — nV/ √Hz IL =IOUT MAX SHDN Input VIH SHDN Input High Threshold 45 —— %VIN VIL SHDN Input Low Threshold — — 15 %VIN Note 1: VR is the regulator output voltage setting. 2: 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 ILMAX at VIN = 6V for T = 10 msec. 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., TA,TJ, θJA). Exceeding the maximum allowable power dissipation causes the device to initiate thermal shutdown. Please see Section 4.0 Thermal Considerations for more details. 7: Hysteresis voltage is referenced to VR. 8: The minimum VIN has to justify the conditions: VIN ≥ VR +VDROPOUT and VIN ≥ 2.7V for IL = 0.1mA to IOUTMAX. TC VOUT =(VOUTMAX –VOUTMIN)x 10 6 VOUT x ∆T |
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