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TC110 Scheda tecnica(PDF) 1 Page - Microchip Technology |
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TC110 Scheda tecnica(HTML) 1 Page - Microchip Technology |
1 / 16 page © 2002 Microchip Technology Inc. DS21355B-page 1 TC110 Features • Assured Start-up at 0.9V •50 µA (Typ) Supply Current (fOSC = 100kHz) • 300mA Output Current @ VIN ≥ 2.7V •0.5 µA Shutdown Mode • 100kHz and 300kHz Switching Frequency Options • Programmable Soft-Start • 84% Typical Efficiency • Small Package: 5-Pin SOT-23A Applications •Palmtops • Battery-Operated Systems • Positive LCD Bias Generators • Portable Communicators Device Selection Table *Other output voltages are available. Please contact Microchip Technology Inc. for details. Package Type General Description The TC110 is a step-up (Boost) switching controller that furnishes output currents of up to 300mA while delivering a typical efficiency of 84%. The TC110 normally operates in pulse width modulation mode (PWM), but automatically switches to pulse frequency modulation (PFM) at low output loads for greater efficiency. Supply current draw for the 100kHz version is typically only 50 µA, and is reduced to less than 0.5 µA when the SHDN input is brought low. Regulator operation is suspended during shutdown. The TC110 accepts input voltages from 2.0V to 10.0V, with a guaranteed start-up voltage of 0.9V. The TC110 is available in a small 5-Pin SOT-23A package, occupies minimum board space and uses small external components (the 300kHz version allows for less than 5mm surface-mount magnetics). Functional Block Diagram Part Number Output Voltage (V)* Package Osc. Freq. (kHz) Operating Temp. Range TC110501ECT 5.0 5-Pin SOT-23A 100 -40 °Cto+85°C TC110331ECT 3.3 5-Pin SOT-23A 100 -40 °Cto+85°C TC110301ECT 3.0 5-Pin SOT-23A 100 -40 °Cto+85°C TC110503ECT 5.0 5-Pin SOT-23A 300 -40 °Cto+85°C TC110333ECT 3.3 5-Pin SOT-23A 300 -40 °Cto+85°C TC110303ECT 3.0 5-Pin SOT-23A 300 -40 °Cto+85°C TC110 1 23 5 4 VDD EXT GND 5-Pin SOT-23A NOTE: 5-Pin SOT-23A is equivalent to the EIAJ SC-74A VOUT SHDN/SS 5 4 TC110 1 3 2 3V to 5V Supply SHDN/SS VDD EXT GND IN5817 D1 47 µF Tantalum Si9410DY 47 µH 10 µF Battery 3V VOUT VOUT R *RC Optional C ON OFF + + + – PFM/PWM Step-Up DC/DC Controller |
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