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XC9509H03CAR Datasheet(PDF) 1 Page - Torex Semiconductor |
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XC9509H03CAR Datasheet(HTML) 1 Page - Torex Semiconductor |
1 / 41 page 1/41 XC9509 Series Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector ■ GENERAL DESCRIPTION The XC9509 series consists of a step-down DC/DC converter and a high-speed LDO regulator connected in parallel with the DC/DC converter's output. A voltage detector is also built-in. Since the input for the LDO voltage regulator block comes from the input power supply, it is suited for use with various applications. The DC/DC converter block incorporates a P-channel driver transistor and a synchronous N-channel switching transistor. With an external coil, diode and two capacitors, the XC9509 can deliver output currents up to 600mA at efficiencies over 90%. The XC9509 is designed for use with small ceramic capacitors. A choice of three switching frequencies are available, 300kHz, 600kHz, and 1.2MHz. Output voltage settings for the DC/DC and VR are set-up internally in 100mV steps within the range of 0.9V to 4.0V (± 2.0%). For the VD, the range is of 0.9V to 5.0V (± 2.0%). The soft start time of the series is internally set to 5ms. With the built-in U.V.L.O. (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 1.4 V or lower. The functions of the MODE pin can be selected via the external control pin to switch the DC/DC control mode and the disable pin to shut down either the DC/DC block or the regulator block. ■ APPLICATIONS ● CD-R / RW, DVD ● HDD ● PDAs, portable communication modem ● Cellular phones ● Palmtop computers ● Cameras, video recorders ■ TYPICAL APPLICATION CIRCUIT ■ FEATURES Input Voltage Range : 2.4V ~ 6.0V Low ESR Capacitor : Ceramic capacitor compatible VD Function : Sense internally either VDD, DCOUT, or VROUT. N-ch open drain output Small Package : MSOP-10, USP-10 <DC/DC Converter Block> Output Voltage Range : 0.9V ~ 4.0V (Accuracy±2%) Output Current : 600mA (for MSOP-10 package) 400mA (for USP-10 package) Control Method : PWM or PWM/PFM Selectable Oscillation Frequency : 300kHz, 600kHz, 1.2MHz <Regulator Block> Reglator Output : Parallel Input to DC/DC Converter Output Voltage Range : 0.9V ~ 4.0V (Accuracy±2%) Current Limit : 300mA Dropout Voltage : 80mV @ IOUT=100mA (VOUT=2.8V) High Ripple Rejection : 60dB @1kHz (VOUT=2.8V) ■ TYPICAL PERFORMANCE CHARACTERISTICS XC9509Hxxxx VIN=3.6V, Topr=25℃, L=4.7μH (CDRH4D28C), CIN:4.7μF (ceramic), CL1:10μF (ceramic), CL2: 4.7μF (ceramic) * Please refer to the typical application circuit when external components are selected. MSOP-10 (TOP VIEW) ETR1006_001 |
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