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XC9511 データシート(PDF) 1 Page - Torex Semiconductor |
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XC9511 データシート(HTML) 1 Page - Torex Semiconductor |
1 / 35 page 1/35 XC9511 Series Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator In Parallel Plus Voltage Detector ■ GENERAL DESCRIPTION The XC9511 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 XC9511 can deliver output currents up to 800mA at efficiencies over 90%. The XC9511 is designed for use with small ceramic capacitors. A choice of three switching frequencies are available, 300 kHz, 600 kHz, and 1.2 MHz. 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. ■ APPLICATIONS ● CD-R / RW, DVD ● HDD ● PDAs, portable communication modem ● Palmtop computers ● Cellular phones ● Cameras, video recorders ■ TYPICAL APPLICATION CIRCUIT ■ FEATURES DC/DC Converter with Built-in LDO and VD Function Input Voltage Range : 2.4V ~ 6.0V Low ESR Capacitor : Ceramic capacitor compatible VD Function : Three VD sensing Options for either VDD, DCOUT, or VROUT Package : SOP-8 <DC/DC Converter Block> Output Voltage Range : 0.9V ~ 4.0V (Accuracy ± 2%) Output Current : 800mA Control Method : PWM or PWM/PFM Selectable Oscillation Frequency : 300kHz, 600kHz, 1.2MHz <Regulator Block> Regulator Input : Parallel Input to DC/DC converter Output Voltage Range : 0.9V ~ 4.0V (Accuracy±2%) Current Limit : 600mA Dropout Voltage : 160mV@IOUT=200mA (VOUT=2.8V) High Ripple Rejection : 60dB @1kHz (VOUT=2.8V) ■ TYPICAL PERFORMANCE CHARACTERISTICS XC9511Axxx VIN=5.0V, Topr=25oC, 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. SOP-8 (TOP VIEW) ETR1008_001 |
同様の部品番号 - XC9511_1 |
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同様の説明 - XC9511_1 |
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