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XC6225B34AGR-G Datasheet(PDF) 9 Page - Torex Semiconductor |
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XC6225B34AGR-G Datasheet(HTML) 9 Page - Torex Semiconductor |
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9 / 15 page  9/15 XC6225 Series each circuit ON/OFF Control CE VIN VSS VOUT R1 R2 Error Amp - + CE CE/ Voltage Reference Current Limit CE/ Rdischg ■OPERATIONAL EXPLANATION The voltage divided by resistors R1 & R2 is compared with the internal reference voltage by the error amplifier. The P-channel MOSFET connected to the VOUT pin, is then driven by the subsequent output signal. The output voltage at the VOUT pin is controlled and stabilized by a system of negative feedback. The current limit circuit and short-circuit protection circuit operate in relation to the level of output current. Further, the IC’s entire circuitry is turned off by the input signal to the CE pin. ● BLOCK DIAGRAM <Input and Output Capacitors> The XC6225 needs an output capacitor CL for phase compensation. Values required for the phase compensation are shown in the chart below. If a loss of the capacitance happens, the stable phase compensation may not be obtained. Please ensure to use a capacitor which does not depend on bias or temperature too much. For a stable power input, please connect an input capacitor CIN of 1.0μF between the VIN pin and the VSS pin. OUTPUT VOLTAGE OUTPUT CAPACITOR 0.8V～1.15V CL=4.7μF 1.2V～1.35V CL=2.2μF 1.4V～4.0V CL=1.0μF 4.05V～5.0V CL=2.2μF <CL Auto-Discharge Function> XC6225B series can discharge the electric charge in the output capacitor (CL), when a low signal to the CE pin, which enables the whole IC circuit to be turned off, is inputted via the N-channel transistor located between the VOUT pin and the VSS pin (refer to BLOCK DIAGRAM). The CL auto-discharge resistance value is set at 780Ω(VOUT=4.0V @ VIN=6.0V at TYP.). The discharge time of the output capacitor (CL) is set by the CL auto-discharge resistance (R) and the output capacitor (CL). By setting the time constant of the CL auto-discharge resistance value [RDCHG] and the output capacitor value (CL) as τ(τ=C x RDCHG), the output voltage after discharge via the N-channel transistor is calculated by the following formula. V= VOUT(E) ×e -t / τ or ｔ= τln（V/ VOUT(E)） Where V: Output voltage after discharge VOUT (E) : Output voltage t : Discharge time, τ : CL auto-discharge resistance RDCHG ×Output capacitor （CL）value C |
Similar Part No. - XC6225B34AGR-G |
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Similar Description - XC6225B34AGR-G |
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