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| x CMOS Low Power Consumption x Operating Voltage : 0.9V~10.0V x Output Voltage Range: 2.0V~7.0V x Output Voltage Accuracy: 2.5% x Oscillator Frequency: 30kHz s Applications q Cellular phones, pagers q Palmtops q Cameras, video recorders q Portable equipment s General Description The XC6373 is a group of PWM controlled step-up DC/DC converter ICs. The XC6373 series employs CMOS process and laser trimming technologies so as to attain low power and high accuracy. The implemention of a new phase compensation circuit and a slow start function ensure excellent transient response and improved performance. The series is particularly suited for use with pager applications because of their low power consumption and low noise characteristics. Output voltage can be selected from 2.0V to 7.0V in 0.1V increments (accuracy; 2.5%). Oscillator frequency is set at 30kHZ (20%) so as to attain the lowest consumption current possible. A step-up converter circuit can be configured using the XC6373 IC with a coil, a diode, and a capacitor. 5-pin packages, which are provided with either a CE (Chip enable) function that reduces power consumption during shut-down mode, or a VDD pin (separated power and voltage detect pins) are available. SOT-89 small package. s Features Operating (start-up) voltage range: 0.9V~10V Output voltage range: 2.0V~7.0V in 0.1V increments Highly accurate: Set-up voltage 2.5% Oscillator frequency: 30kHz (20%) Maximum output current (Tr. Built-In) : 50mA (TYP.) Note (1) at VIN=3.0V, VOUT=5.0V Highly efficient (Tr. Built-In): 82% (TYP.) Note (1) at VIN=3.0V, VOUT=5.0V Either chip enable or independent VOUT pin option is selectable for 5pin package units. Phase compensation and slow start-up circuits included. Small Package: SOT-89 mini-power mold (3-pin, 5-pin) Note (1): Performance depends on external components and PCB layout. e s Selection Guide PART TYPE OPERATION MODE PWM PACKAGE SWITCHING Built-in Transistor "Lx" lead Built-in Transistor "Lx" lead Built-in Transistor "Lx" lead Chip Enable(CE) Function Separatated "VDD" and "VOUT" ADDITIONAL FUNCTION FEATURES Switching transistor incorporated standard type. Low ripple and highly efficient from low current to high current. Stand-by (CE) capability added version to the XC6373A. Stand-by current; 0.50A max. Individual power supply and set-up voltage sensing leads are available. XC6373A SOT-89-3 XC6373C PWM SOT-89-5 XC6373E PWM SOT-89-5 s Pin Configulation 5 4 SOT-89-3 (TOP VIEW) SOT-89-5 (TOP VIEW) 1 2 3 1 2 3 e s Pin Assignment (XC6373A) PIN NUMBER 1 2 3 PIN NAME VSS VOUT LX FUNCTION Ground Output voltage monitor, IC internal power supply Switch (XC6373C) PIN NUMBER PIN NAME 5 2 4 3 1 VSS VOUT LX CE NC FUNCTION Ground Output voltage monitor, IC internal power supply Switch Chip enable No connection (XC6373E) PIN NUMBER PIN NAME 5 2 4 3 1 VSS VDD LX VOUT NC FUNCTION Ground IC internal power supply Switch Output voltage monitor No connection s Block Diagram VDD LX Buffer Slow Start Vref Phase comp. LX VDD VOUT Buffer Slow Start Vref Phase comp. VDD VSS PWM Control OSC 30kHz VSS PWM Control OSC 30kHz VOUT Chip Enable CE Note: The CE pin is only used with the XC6373C. Note: The VDD pin is only used with the XC6373E. s Absolute Maximum Ratings PARAMETER VOUT Input Voltage LX Pin Voltage LX Pin Current Continuous Total Power Dissipation Operating Ambient temperature Storage Temperature SYMBOL VOUT VLX ILX Pd Topr Tstg CONDITIONS 12 12 400 500 -30 ~ +80 -40 ~ +125 Ta=25: UNIT V V mA mW : : s Electrical Characteristics XC6373A300PR PARAMETER Output Voltage Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage VOUT=3.0V, FOSC=30kHz SYMBOL VOUT VIN VST1 VST2 External Components Connected. IOUT=1mA. No external components. Apply voltage to VOUT. LX :10k pull-up to 5V. Supply Current 1 Supply Current 2 LX Switch-On Resistance LX Leak Current Oscillator Frequency Maximum Duty Ratio Efficiency Slow-Start Time IDD1 IDD2 RSWON ILXL FOSC MAXDTY EFFI TSS 4.0 Same as VST2. Apply output voltage 0.95 to VOUT. Same as VST2. Apply output voltage 1.1 to VOUT. Same as IDD1. VLX=0.4V. No external components. VOUT=VLX=10V. Same as IDD1. Measuring of Lx waveform. Same as IDD1. Measuring of Lx waveform. 13.1 3.9 3.4 21.9 7.9 5.7 1.0 24 80 30 87 77 10.0 20.0 36 92 A A A kHz % % mS CONDITIONS MIN 2.925 10 0.90 0.80 TYP 3.000 MAX 3.075 Ta=25: UNIT V V V V e Measuring conditions: Unless otherwise specified, VIN=VOUT 0.6,IOUT=15mA. See Typical Application Circuits, Fig.1. XC6373A330PR PARAMETER Output Voltage VOUT=3.3V, FOSC=30kHz SYMBOL VOUT VIN VST1 VST2 External Components Connected. IOUT=1mA. No external components. Apply voltage to VOUT. LX 10k pull-up to 5V. Same as VST2. Apply output voltage 0.95 to VOUT. Same as VST2. Apply output voltage 1.1 to VOUT. Same as IDD1. VLX=0.4V. No external components. VOUT=VLX=10V. Same as IDD1. Measuring of Lx waveform. Same as IDD1. Measuring of Lx waveform. CONDITIONS MIN 3.128 10 0.90 0.80 TYP 3.300 MAX 3.383 Ta=25: UNIT V V V V Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage Supply Current 1 Supply Current 2 LX Switch-On Resistance LX Leak Current Oscillator Frequency Maximum Duty Ratio Efficiency Slow-Start Time IDD1 IDD2 RSWON ILXL FOSC MAXDTY EFFI TSS 14.1 4.0 3.4 23.5 8.1 5.7 1.0 A A A kHz % % 24 80 30 87 77 36 92 4.0 10.0 20.0 mS Measuring conditions: Unless otherwise specified, VIN=VOUT 0.6, IOUT=16.5mA. See Typical Application Circuits, Fig.1. s Typical Application Circuits CE SD L VOUT L 3 2 1 SD VOUT VIN SOT-89-3 (TOP VIEW) + CL VIN SOT-89-5 (TOP VIEW) + CL 1 2 3 4 5 e GND GND L: SD: CL: 100H (SUMIDA, CD-54) MA735 (Schottky diode; MATSUSHITA) 16V 47F (Tantalum capacitor; NICHICON, F93) L: SD: CL: 100H (SUMIDA, CD-54) MA735 (Schottky diode; MATSUSHITA) 16V 47F (Tantalum capacitor; NICHICON, F93) Fig.1 XC6373A Application Fig.3 XC6373C Application SD L 3 2 1 VOUT + VIN SOT-89-5 (TOP VIEW) CL VDD 4 5 GND L: SD: CL: 100H (SUMIDA, CD-54) MA735 (Schottky diode; MATSUSHITA) 16V 47F (Tantalum capacitor; NICHICON, F93) Fig.5 XC6373E Application s Electrical Characteristics (1) OUTPUT VOLTAGE vs. OUTPUT CURRENT (2) EFFICIENCY vs. OUTPUT CURRENT OUTPUT VOLTAGE: VOUT (V) EFFICIENCY: EFFI (%) e OUTPUT CURRENT: IOUT(mA) OUTPUT CURRENT: IOUT(mA) (3) NO LOAD INPUT CURRENT vs. INPUT VOLTAGE (4) RIPPLE VOLTAGE vs. OUTPUT CURRENT INTPUT CURRENT: IIN (A) INPUT VOLTAGE: VIN(V) RIPPLE: Vr (mVp-p) OUTPUT CURRENT: IOUT(mA) Note: Please refer to the XC6371 series application notes for more detailed information and data (www.torex.co.jp) |
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