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TC115331ECT Datasheet(PDF) 2 Page - Microchip Technology |
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TC115331ECT Datasheet(HTML) 2 Page - Microchip Technology |
2 / 14 page TC115 DS21361C-page 2 2003 Microchip Technology Inc. 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings† Power Supply Voltage (PS)...............................................12V Power Dissipation ......................................................500 mW LX Sink Current......................................................400 mA pk SHDN Input Voltage ..........................................................12V Operating Temperature Range........................-40°C to +85°C Storage Temperature Range.........................-40°C to +125°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. PIN FUNCTION TABLE DC CHARACTERISTICS Symbol Description NC Not connected PS Power and voltage sense input SHDN Shutdown input LX Inductor switch output GND Ground terminal Electrical Specifications: Unless otherwise noted, VOUT = 5V, TA = +25°C. Circuit configuration is illustrated in Figure 5-1. Parameters Sym Min Typ Max Units Conditions Operating Supply Voltage VIN 0.9 — 10.0 V Note 5 Start-Up Supply Voltage VSTART —— 0.9 V IOUT = 1 mA LX Maximum Sink Current ILXMAX —— 350 mA LX Limit Frequency fLIM —200 —kHz VLX = VLXLIM LX Limit Voltage VLXLIM 0.7 — 1.3 V Note 2 No Load Supply Current IDD —13 26 µA IOUT = 0, VIN = VOUT x 0.8 (Note 3) Boost Mode Supply Current ICC — 80 135 µA No external components, VIN = (0.95 x VOUT) applied to PS (or VDD) input Standby Supply Current ISTBY — 9 17 µA No external components, VIN = (1.1 x VOUT) applied to PS (or VDD) input Shutdown Supply Current ISD —— 0.5 µA SHDN = 0V Oscillator Frequency fOSC 85 100 115 kHz Note 2, Note 4 Output Voltage VOUT VR x 0.975 VR VR x 1.025 V VIN = 2.2V minimum (Note 1) LX Output ON Resistance Rswon — 1.4 2.4 Ω VLX = 0.4V Duty Cycle (PFM Operating Mode) PFMDUTY 10 17 25 % No external components Maximum Duty Cycle MAXDUT Y 80 87 92 % Note 4 Soft Start Time tSS 410 20 msec Efficiency h — 85 — % SHDN Input Logic High VIH 0.75 — — V SHDN Input Logic Low VIL — — 0.20 V Note 1: VR is the nominal factory-programmed output voltage setting. 2: VLXLIM is the voltage on the LX pin (with internal switch ON) that will cause the oscillator to run at twice nominal frequency in to limit the switch current through the internal N-channel switching transistor. 3: Measured with D1 = MA735 (reverse current < 1 µA at a reverse voltage of 10V). 4: With TC115 operating in PWM mode. 5: See Section 4.4, “Behavior When VIN is Greater Than the Factory-Programmed VOUT Setting”. |
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