Series Low Frequency PWM Controlled, Step‐Up DC/DC Converters ◆CMOS Low Power Consumption ■Applications ◆Operating Voltage : 0.9V~10.0V ●Cellular phones, pagers ◆Output Voltage Range : 2.0V~7.0V ●Palmtops ●Cameras, video recorders ◆Output Voltage Accuracy : ±2.5% ◆Oscillator Frequency ●Portable equipment : 30kHz 4 ■General Description ■Features 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. Operating (start-up) voltage range 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. ■Typical Application Circuit SD VOUT : 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.) @ VIN=3.0V, VOUT=5.0V ....Note (1) Highly efficient (Tr. Built-In) : 82% (TYP.) @ VIN=3.0V, VOUT=5.0V ....Note (1) Either chip enable or independent VOUT pin option is selectable for 5-pin 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. ■Typical Performance Characteristic XC6373A300PR L L＝100μH（CＲ54）， CL＝47μF（Tantalum） VIN CIN SOT−89 (TOP VIEW) 1 2 GND CL （Tantalum） 3 Efficiency:EFFI (%) 100 2.7V 80 60 1.8V VIN=0.9V 40 1.5V 1.2V 20 0 0.1 1 10 100 1000 Output Current:IOUT（mA） 465 XC6373 Series ■Pin Configulation ■Pin Assignment 5 4 (XC6373A) PIN NUMBER PIN NAME 1 2 3 1 SOT-89 (TOP VIEW) 2 FUNCTION VSS Ground 2 VOUT Output voltage monitor, IC internal power supply 3 LX Switch 1 3 SOT-89-5 (TOP VIEW) (XC6373C) PIN NUMBER PIN NAME 5 2 4 FUNCTION VSS Ground VOUT Output voltage monitor, IC internal power supply 4 LX Switch 3 CE Chip enable 1 NC No connection (XC6373E) PIN NUMBER PIN NAME FUNCTION 5 VSS Ground 2 VDD IC internal power supply 4 LX Switch 3 VOUT Output voltage monitor 1 NC No connection ■Product Classification ●Selection Guide PART TYPE OPERATION MODE PACKAGE SWITCHING ADDITIONAL FUNCTION XC6373A PWM SOT-89 Built-in Transistor "Lx" lead XC6373C PWM SOT-89-5 Built-in Transistor "Lx" lead Chip Enable(CE) Function Stand-by (CE) capability added version to the XC6373A. Stand-by current; 0.50µA max. XC6373E PWM SOT-89-5 Built-in Transistor "Lx" lead Separated "VDD" and "VOUT" Individual power supply and set-up voltage sensing leads are available. Switching transistor incorporated standard type. Low ripple and highly efficient from low current to high current. ●Ordering Information XC6373 Series q A C E w e r t y 466 O P R L FEATURES XC6373qwerty PWM Controlled 3-pin. Built-in switching transistor Stand-by capability. Built-in switching transistor Separated VDD and VOUT Built-in switching transistor Output Voltage (e.g.,VOUT=3.5V ➔ w=3, e=5) OSC Frequency 30kHz Package q=A ➔ SOT-89 q=C,E ➔ SOT-89-5 Embossed tape: Standard Feed Embossed tape: Reverse Feed XC6373 Series ■Packaging Information ●SOT-89 1.5±0.1 +0.15 -0.2 0.8 min 4.25max 2.5±0.1 1.6 （0.4） 4.5±0.1 0.42±0.06 0.4 0.42±0.06 +0.03 -0.02 0.47±0.06 4 1.5±0.1 1.5±0.1 ●SOT-89-5 +0.15 1.6 -0.2 1.5±0.1 0.8min 4.5max 0.8min 0.42±0.06 2.5±0.1 （0.4） 0.42±0.06 0.42±0.06 0.42±0.06 0.42±0.06 0.4 +0.03 -0.02 0.47±0.06 1.5±0.1 1.5±0.1 4.5±0.1 467 XC6373 Series ■Marking w r q e 2 4 1 3 SOT-89-5 (TOP VIEW) SOT-89 (TOP VIEW) q Represents the Product Classification FUNCTION DESIGNATOR 4 PRODUCT NAME A − Built-in Transistor XC6373A＊＊＊P＊ A CE Built-in Transistor XC6373C＊＊＊P＊ S Separated VDD and VOUT Built-in Transistor XC6373E＊＊＊P＊ w Represents the integer of the Output Voltage and Oscillator Frequency INTEGER OF THE OUTPUT VOLTAGE OSCILLATOR FREQUENCY（PRODUCT NAME） 30kHz （XC6373＊＊＊0P＊） 1.X 2.X C 3.X 4.X D E B 5.X F 6.X 7.X H K e Represents the decimal number of the Output Voltage and Oscillator Frequency THE DECIMAL NUMBER OF OUTPUT VOLTAGE OSCILLATOR FREQUENCY（PRODUCT NAME） X.0 0 X.1 1 X.2 X.3 2 3 X.4 X.5 X.6 X.7 4 5 6 7 X.8 8 X.9 9 r Denotes the production lot number 0 to 9, A to Z repeated(G.I.J.O.Q.W excepted) 468 30kHz （XC6373＊＊＊0P＊） XC6373 Series ■Block Diagram Lx Buffer VSS Vref PWM Control OSC 30KHz VDD Lx Soft Start Soft Start VDD Buffer VOUT Phase comp. VSS PWM Control OSC 30KHz VDD Vref Phase comp. ＋ ＋ − − VOUT Chip Enable CE Note: The CE pin is only used with the XC6373C. Note: The VDD pin is only used with the XC6373E. 4 ■Absolute Maximum Ratings Ta=25°C PARAMETER SYMBOL CONDITIONS UNIT VOUT Input Voltage VOUT 12 V LX Pin Voltage VLX 12 V LX Pin Current ILX 400 mA Continuous Total Power Dissipation Pd 500 mW Operating Ambient temperature Topr –30 ~ +80 °C Storage Temperature Tstg –40 ~ +125 °C 469 XC6373 Series ■Electrical Characteristics XC6373A300PR VOUT=3.0V, FOSC=30kHz PARAMETER SYMBOL Output Voltage VOUT Maximum Input Voltage VIN MIN TYP MAX UNIT 2.925 3.000 3.075 V 10 V VST1 External Components Connected. IOUT=1mA. 0.90 V Oscillation Start-up Voltage VST2 No external components. Apply voltage to VOUT. LX :10kΩ pull-up to 5V. 0.80 V Supply Current 1 IDD1 Same as VST2. Apply output voltage ✕ 0.95 to VOUT. 13.1 21.9 µA Supply Current 2 IDD2 3.9 7.9 µA LX Switch-On Resistance RSWON Same as VST2. Apply output voltage ✕ 1.1 to VOUT. Same as IDD1. VLX=0.4V. 3.4 5.7 Ω 1.0 µA Operation Start-up Voltage 4 Ta=25°C CONDITIONS LX Leak Current ILXL Oscillator Frequency FOSC Maximum Duty Ratio MAXDTY Efficiency EFFI Slow-Start Time TSS No external components. VOUT=VLX=10V. Same as IDD1. Measuring of Lx waveform. 24 30 36 kHz Same as IDD1. Measuring of Lx waveform. 80 87 92 % 4.0 10.0 20.0 mS TYP 3.300 MAX 3.383 77 % Measuring conditions: Unless otherwise specified, VIN=VOUT ✕ 0.6,IOUT=15mA. See Typical Application Circuits, Fig.1. XC6373A330PR VOUT=3.3V, FOSC=30kHz PARAMETER Output Voltage SYMBOL VOUT Maximum Input Voltage VIN Ta=25°C CONDITIONS MIN 3.128 V 10 VST1 External Components Connected. IOUT=1mA. 0.90 V Oscillation Start-up Voltage VST2 No external components. Apply voltage to VOUT. LX 10kΩ pull-up to 5V. 0.80 V Supply Current 1 IDD1 Same as VST2. Apply output voltage ✕ 0.95 to VOUT. 14.1 23.5 µA Supply Current 2 IDD2 4.0 8.1 µA LX Switch-On Resistance RSWON Same as VST2. Apply output voltage ✕ 1.1 to VOUT. Same as IDD1. VLX=0.4V. 3.4 5.7 Ω 1.0 µA Operation Start-up Voltage LX Leak Current ILXL Oscillator Frequency FOSC Maximum Duty Ratio MAXDTY Efficiency EFFI Slow-Start Time TSS No external components. VOUT=VLX=10V. Same as IDD1. Measuring of Lx waveform. 24 30 36 kHz Same as IDD1. Measuring of Lx waveform. 80 87 92 % 4.0 10.0 20.0 mS 77 Measuring conditions: Unless otherwise specified, VIN=VOUT ✕ 0.6, IOUT=16.5mA. See Typical Application Circuits, Fig.1. 470 UNIT V % XC6373 Series ■Typical Application Circuits CE SD SD VOUT VOUT L L VIN 3 VIN CIN SOT−89 (TOP VIEW) CIN 2 CL （Tantalum） （Tantalum） 5 3 GND GND L : SD : CL : CIN : 1 (TOP VIEW) SOT−89−5 CL 4 1 2 100µH (SUMIDA, CR-54) MA2Q735 (Schottky diode; MATSUSHITA) 16V 47µF (Tantalum capacitor; NICHICON, MCE) 16V220µF (Aluminium Electrolytic Capacitor) Fig.1 XC6373A Application L : 100µH (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47µF (Tantalum capacitor; NICHICON, MCE) CIN : 16V220µF (Aluminium Electrolytic Capacitor) 4 Fig.3 XC6373C Application SD VOUT L 3 2 1 VIN CIN CL （Tantalum） (TOP VIEW) SOT−89−5 4 VDD 5 GND L : 100µH (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47µF (Tantalum capacitor; NICHICON, MCE) CIN : 16V220µF (Aluminium Electrolytic Capacitor) Fig.5 XC6373E Application 471 XC6373 Series ■Typical Performance Characteristics (1) OUTPUT VOLTAGE vs. OUTPUT CURRENT Topr=25°C (2) EFFICIENCY vs. OUTPUT CURRENT Topr=25°C XC6373A300PR Output Voltage: VOUT (V) 3.10 3.05 VIN=0.9V XC6373A300PR L =47μF(ﾀﾝﾀﾙ) C L＝47μF （Tantalum） 1.2V 1.5V 1.8V 3.00 2.7V 2.95 2.90 0.1 4 1 10 100 2.7V 80 60 1.8V VIN=0.9V 40 1.2V Output Current: IOUT(mA) 1000 1.5V 1.2V 2.7V VIN=0.9V L＝100μH, CL＝47μF （Tantalum） 200 Intput Current: IIN (µA) Ripple Voltage: Vr (mVp-p) 1.8V 20 0 0.1 100 XC6373A300PR 80 40 10 (4) NO LOAD INPUT CURRENT vs. INPUT VOLTAGE Topr=25°C L＝100μH, CL＝47μF （Tantalum） 60 1 Output Current: IOUT(mA) XC6373A300PR 100 1.5V 20 0 0.1 1000 (3) RIPPLE VOLTAGE vs. OUTPUT CURRENT Topr=25°C 150 100 50 0 1 10 100 Output Current: IOUT(mA) 472 L＝100μH, CL＝47μF （Tantalum） 100 Efficiency: EFFI (%) L=100μH(CＲ54),C L＝100μH, 1000 0 1 2 Input Voltage: VIN(V) 3