XC6601 Series

      The XC6601 Series are Low Voltage Input LDO Voltage Regulators designed for Mobile phones;Cordless phones;Wireless communication equipment;Portable games;Cameras;Audio visual equipment;Portable AV equipment;PDAs.The XC6601 Series has features including Maximum Output Current:400mA (Limiter 550mA TYP.);Dropout Voltage: 38mV@IOUT=100mA (TYP.)(at VBIAS - VOUT=2.4V);Bias Voltage Range: 2.5V ~ 6.0V (VBIAS - VOUT 1.2V);Output Voltage Range: 0.7V ~ 1.8V (0.05V increments).
      The XC6601 series is a low voltage input CMOS LDO regulator which provides highly accurate (20mV) outputs and can supply current efficiently due to its ultra low on-resistance even at low output voltages. The series is ideally suited to the applications which require very low dropout voltage operation and consists of a voltage reference, an error amplifier, a driver transistor, a current limiter, a fold back circuit, a thermal shutdown (TSD) circuit, an under voltage lock out (UVLO) circuit and a phase compensation circuit.Output voltage is selectable in 0.05V increments within a range of 0.7V to 1.8V using laser trimming technology and ceramic capacitors can be used for the output stabilization capacitor (CL).The over current protection circuit (the current limiter and the fold back circuit) as well as the thermal shutdown circuit (the TSD circuit) are built-in. These two protection circuits will operate when either the output current reaches the current limit level or the junction temperature reaches the temperature limit level.With the built-in UVLO function, the regulator output is forced OFF when the voltage level at the VBIAS pin or the VIN pin falls below the UVLO voltage level.
      In order to obtain high efficient output current through low on-resistance, please take enough Vgs (=VBIAS VOUT(T)) of the driver transistor. Output current triggers operation of constant current limiter and fold-back circuit, heat generation triggers operation of thermal shutdown circuit, the driver transistor circuit is forced OFF when VBIAS or VIN voltage goes lower than UVLO voltage.Further, the IC's internal circuitry can be shutdown via the CE pin's signal.The products and product specifications contained herein are subject to change without notice to improve performance characteristics. Consult us, or our representatives before use, to confirm that the information in this datasheet is up to date.