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XC95103SL Datasheet(PDF) 1 Page - Torex Semiconductor |
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XC95103SL Datasheet(HTML) 1 Page - Torex Semiconductor |
1 / 9 page October 28, 2003 Ver. 4 Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator In Series plus Voltage Detector Preliminary ! Input Voltage Range 2.4V ~ 6.0V ! APPLICATIONS ! Output Voltage Range DC/DC 0.9 ~ 4.0V ( ±2%) " CD-R / RW, DVD VR 0.9 ~ 4.0V ( ±2%) " HDD VD 0.9 ~ 5.0V ( ±2%) " PDAs, portable communication modem ! Switching Frequency 300kHz, 600kHz, 1.2MHz " Cellular phones ! Output Current DC/DC 800mA " Palmtop computers VR 600mA " Cameras, video recorders ! Ultra Small Packages SOP-8 ! Ceramic Capacitor Compatible ! GENERAL DESCRIPTION ! FEATURES Input Voltage Range : 2.4V ~ 6.0V Load Capacitors : Ceramic Capacitors Compatible (Low ESR Capacitors) VD Function : Detects output voltage from the VDOUT pin while sensing either VDD, DCOUT, or VROUT internally. Nch Open Drain Output <DC/DC Converter> Output Voltage Range : 0.9 ~ 4.0V (Accuracy ±2%) Output Current : 800mA Controls : PWM Control Oscillation Frequency : 300kHz, 600kHz, 1.2MHz <Regulator> Output Voltage Range : 0.9 ~ 4.0V (Accuracy ±2%) Current Limit 600mA Dropout Voltage : 240mV @ IOUT=300mA (VOUT=2.8V) High Ripple Rejection 60dB @1kHz (VOUT=2.8V) ! TYPICAL APPLICATION CIRCUIT ! TYPICAL PERFORMANCE CHARACTERISTICS XC9510 Series PWM, PWM / PFM Automatic Switching External The XC9510 series consists of a step-down DC/DC converter and a high-speed LDO regulator connected in series with the DC/DC converter's output. A voltage detector is also built-in. A highly efficient, low noise output is possible since the regulator is stepped- down further from the DC/DC output. 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 XC9510 can deliver output currents up to 800mA at efficiencies over 90%. The XC9510 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 0.1V 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 operational states of the DC/DC and the regulator blocks can be changed by inputting three kinds of voltage level via the CE/MODE pin. 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 the regulator block. SOP-8 (Top View) 1 2 3 4 8 7 5 6 VDD CE/ MODE AGND LX DCOUT VROUT VDOUT PGND CIN L CL1 CL2 DCOUT VROUT SD Semiconductor Ltd. XC9510Hxxxx 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 DC/DC Output Current IDOUT VR Output Current IROUT (mA) VIN=5.0V, Topr=25OC, L:4.7uH(CDRH4D28C), CIN:4.7uF(ceramic), CL1:10uF(ceramic), CL2:1uF(ceramic) DC/DC Efficiency (DCOUT:3.4V, 1.2MHz), VR Efficiency (VROUT:3.0V) PWM/PFM switching control PWM control Data Sheet 1 |
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