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| XC6375 Series x CMOS Low Power Consumption x Operating Voltage: 2.2V~10.0V x Output Voltage Range: 2.0V~7.0V x Output Voltage Accuracy: 2.5% x Oscillator Frequency: 100kHz s General Description PWM Controlled, Step down DC/DC Converters HP010199 s Aplications q Cellular phones, pagers q Palmtops q Cameras, video recorders q Portable equipment s Features Operating (start-up) voltage range: 2.2V~10V Output voltage range: 2.0V~7.0V in 0.1V increments Highly accurate: Set-up voltage 2.5% Oscillator frequency: 100kHz (15%) Maximum output current: 500mA (MIN.) at VIN=5.0V, VOUT=3.0V High efficiency: Typ.88% at VIN=3.6V, VOUT=3.0V, IOUT=100mA* Built-in phase compensation and slow start-up circuits. Small package: SOT-89-5 (5-pin) mini-power mold gNOTE: Performance depends on external components, PCB layout, etc. The XC6375 series are PWM controlled step down DC/DC converters. The XC6375 series is produced by CMOS process and laser trimming technologies to attain low-power and high-accuracy. Built-in phase compensation and slow start-up circuits ensure excellent transient response and improved electrical characteristics. Output voltage can be determined from 2.0V to 7.0V in 0.1V increments (accuracy: 2.5%) by means of laser trimming technology. The internal oscillator is trimmed to a fixed frequency of 100kHz (accuracy; 15%). The duty ratio varies up to 100% according to loads. A step-down convert can be easily configured with only a switching element (a transistor), a coil, a diode, and a capacitor. The products are available in small SOT-89-5 packages. s Pin Configuration 5 4 s Pin Assignment PIN NUMBER 1 2 3 PIN NAME NC VDD VOUT EXT VSS FUNCTION No Connection IC Internal power supply Output voltage monitor External switch transistor drive Ground 1 2 SOT-89-5 (TOP VIEW) 3 4 5 s Block Diagram VDD VDD Buffer Slow Start PWM Control OSC 100kHz Vref PWM comp VOUT s Absolute Maximum Ratings PARAMETER Input Voltage EXT pin Voltage EXT pin Current Continuous total Power Dissipation SYMBOL VOUT VEXT IEXT Pd Topr Tstg RATINGS 12 -0.3~VOUT+0.3 50 500 -30~+80 -40~+125 Ta=25: UNIT V V mA mW : : EXT Operating Ambient Temperature Storage Temperature e-67 230 s Electrical Characteristics XC6375A501PR PARAMETER Output Voltage Maximum Input Voltage Supply Voltage Range Supply Current 1 Vout=5.0V, Fosc=100kHz SYMBOL VOUT VIN VDD IDD1 No external components. Apply output voltage ! 0.95 to VOUT. Supply Current 2 EXT"High" On Resistance EXT"Low" On Resistance Oscillator Frequency Maximum Duty Ratio Efficiency Slow-Start Time IDD2 REXTH REXTL FOSC MAXDTY EFFI TSS 4.0 Same as IDD1. Apply output voltage ! 1.1 to VOUT. Same as IDD 2. VEXT=VOUT-0.4V. Same as IDD 1. VEXT=0.4V. Same as VOUT. Measuring of EXT waveform. Same as IDD 1. Measuring of EXT waveform. 85 100 90 10.0 20.0 19.9 37.5 30 100 33.2 62.5 50 115 A kHz % % ms CONDITIONS External Components Connected MIN 4.875 10 2.2 24.9 10 41.6 TYP 5.000 MAX 5.125 UNITS V V V A Measuring conditions: Unless otherwise specified, VIN=VDD=VOUT ! 1.2 (VDD should be another voltage source), IOUT =100mA. See Typical Application Circuit. s Typical Application Circuit L VOUT Tr 3 VIN CIN RB 2 (TOP VIEW) 1 L: SD: CL: CIN: Tr: RB: 100H (SUMIDA, CD-54) MA735 (Schottky diode; MATUSHITA) 10V 47F (Tantalum capacitor, NICHICON, F93) 16V 10F (Tantalum capacitor, NICHICON, F93) 2SA1213 1.0k SOT-89-5 SD CL 4 5 GND 231 e-68 XC6375 Series (1)OUTPUT VOLTAGE vs. OUTPUT CURRENT PWM Controlled, Step down DC/DC Converters XC6375A301 L=100H,CL=47F(Tantalum), Tr=2SA1223,RB=510 XC6375A301 L=100H,CL=47F(Tantalum), Tr=2SA1223,RB=510 OUTPUT VOLTAGE:VOUT(V) VIN=3.5V 3.0 2.9 2.8 2.7 0 1 10 100 1000 OUTPUT CURRENT:IOUT(mA) VIN=5.0V VIN=7.0V VIN=10V OUTPUT VOLTAGE:VOUT(V) 3.1 3.1 3.0 2.9 2.8 2.7 2.6 2.5 0 1 10 100 1000 OUTPUT CURRENT:IOUT(mA) VIN=3.0V 3.1V XC6375A501 L=100H,CL=47F(Tantalum), Tr=2SA1223,RB=510 XC6375A501 L=100H,CL=47F(Tantalum), Tr=2SA1223,RB=510 OUTPUT VOLTAGE:VOUT(V) 5.0 4.8 4.6 4.4 4.2 4.0 0 1 10 100 1000 OUTPUT CURRENT:IOUT(mA) VIN=5.0V VIN=7.0V VIN=8.0V VIN=10V OUTPUT VOLTAGE:VOUT(V) 5.2 5.2 5.0 4.8 4.6 4.4 4.2 4.0 0 1 10 100 1000 OUTPUT CURRENT:IOUT(mA) VIN=5.0V 5.1V (2)EFFICIENCY vs. OUTPUT CURRENT XC6375A301 L=100H,CL=47F(Tantalum), Tr=2SA1223,RB=510 XC6375A301 L=100H,CL=47F(Tantalum), Tr=2SA1223,RB=510 100 EFFICIENCY:EFFI(%) 80 60 40 20 0 0 1 10 100 OUTPUT CURRENT:IOUT(mA) 1000 VIN=3.5V 5.0V 7.0V EFFICIENCY:EFFI(%) 100 80 60 40 20 0 0 1 10 100 OUTPUT CURRENT:IOUT(mA) 1000 VIN=5.5V 7.0V 10.0V e-69 232 (3)RIPPLE VOLTAGE vs. OUTPUT CURRENT XC6375A301 L=100H,CL=47F(Tantalum), Tr=2SA1223,RB=510 XC6375A501 L=100H,CL =47F(Tantalum), Tr=2SA1223,RB=510 100 80 60 40 VDS=3.5V 20 0 0 1 10 100 1000 OUTPUT CURRENT:IOUT(mA) 5.0V 7.0V 100 80 60 8.0V 40 20 0 0 1 10 100 1000 OUTPUT CURRENT:IOUT(mA) Vin=5.5V 7.0V RIPPLE Vr(mVp-p) RIPPLE Vr(mVp-p) 233 e-70 |
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