Series PWM Controlled Step‐Up DC/DC Controllers/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% ●Portable products ◆Selectable Oscillator Frequency : 50kHz, 100kHz, 180kHz 4 ■General Description ■Features The XC6371 series are a group of PWM controlled step-up DC/DC converters. On-chip proprietary phase compensation and soft start-up circuits ensure excellent transient response and improved performance. Output voltage can be selected from 2.0V to 7.0V in 0.1V increments (accuracy: ±2.5%). Oscillator frequency is also selectable from three frequencies; 50, 100, and 180kHz (accuracy: ±15%). Every built-in switching transistor type enables a step-up circuit to be configured using only three external components; a coil, a diode, and a capacitor. Operating (start-up) voltage range : 0.9V~10V External transistor versions are available to accommodate high output current applications. 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. Output voltage range : 2.0V~7.0V in 0.1V increments Highly accurate : Set-up voltage ±2.5% Oscillator frequency : 50kHz, 100kHz, 180khz (±15%) selectable Maximum output currents (Tr built-in) : Typ.100mA @ VIN=3.0, VOUT=5.0V .....Note(1) Highly efficient (Tr built-in) : Typ.85% @ VIN=3.0, VOUT=5.0V .....Note(1) Built-in switching transistor type and an external Tr type are available. Five-lead packaged units offer either Chip Enable or independent VOUT pin option. Phase compensation and soft start-up circuits built-in Small package : SOT-89 mini-power mold (3-pin, 5-pin) Note(1): Performance depends on external components and PCB layout. ■Typical Application Circuit ■Typical Performance Characteristic SD VOUT XC6371A301PR L L＝100μH（CR54）， CL＝47μF（Tantalum） 100 2.7V CIN SOT-89 (TOP VIEW) 1 2 GND CL （Tantalum） 3 Efficiency:EFFI (%) VIN 80 60 VIN=0.9V 1.8V 40 1.2V 1.5V 20 0 0.1 1 10 100 1000 Output Voltage:IOUT（mA） 437 XC6371 Series ■Pin Configuration 5 1 2 3 1 SOT-89 (TOP VIEW) 4 2 3 SOT-89-5 (TOP VIEW) ■Pin Assignment 4 (XC6371A,XC6371B) PIN NUMBER PIN NAME XC6371A FUNCTION XC6371B 1 1 VSS Ground 2 2 VOUT Output voltage monitor / IC internal power supply 3 – Lx Switch – 3 EXT External switch transistor drive PIN NAME FUNCTION (XC6371C,XC6371D) PIN NUMBER XC6371C XC6371D 5 5 VSS Ground 2 2 VOUT Output voltage monitor / IC internal power supply 4 – Lx Switch – 4 EXT External switch transistor drive 3 3 CE Chip Enable 1 1 NC No Connection PIN NAME FUNCTION (XC6371E,XC6371F) PIN NUMBER XC6371E 438 XC6371F 5 5 VSS Ground 2 2 VDD IC internal power supply 4 – Lx Switch – 4 EXT External switch transistor drive 3 3 VOUT Output voltage monitor 1 1 NC No Connection XC6371 Series ■Product Classification ●Selection Guide PART TYPE OPERATION MODE PACKAGE SWITCHING RELATED ADDITIONAL FUNCTION XC6371A PWM SOT-89 Built-in Transistor "Lx"lead ------------ • Switching transistor incorporated standard type. • Low ripple and highly efficient from low current ------------ • External switching transistor standard type. • Adding external transistor can improve the PWM XC6371B SOT-89 External Transistor "EXT"lead FEATURES to high current. output capability up to several hundred mA. • Stand-by (CE)function added version to the XC6371A. • Stand-by current: 0.5µA max. XC6371C PWM SOT-89-5 Built-in Transistor "Lx"lead Chip Enable(CE) XC6371D PWM SOT-89-5 External Transistor "EXT"lead Chip Enable(CE) XC6371E PWM SOT-89-5 Built-in Transistor Separated "Lx"lead "VDD"and"VOUT"leads • Individual XC6371F PWM SOT-89-5 External Transistor Separated "EXT"lead "VDD"and"VOUT"leads • Individual • Stand-by (CE)function added version to the XC6371B. current: 0.5µA max. • Stand-by power supply and set-up voltage sensing leads are available. 4 power supply and set-up voltage sensing leads are available. ●Ordering Information XC6371qwerty XC6371 Series q A B C D E F w e r 0 1 2 t P y R L PWM Controlled 3-pin. Built-in switching transistor 3-pin. External switching transistor Stand-by capability. Built-in switching transistor Stand-by capability. External switching transistor Separated VDD and VOUT. Built-in switching transistor Separated VDD and VOUT. External switching transistor Output Voltage e.g.,VOUT=3.5V ➔ w=3, e=5 OSC Frequency 50kHz OSC Frequency 100kHz OSC Frequency 180kHz Package q=A ~ B ➔ SOT-89 q=C ~ F ➔ SOT-89-5 Embossed tape: Standard Feed Embossed tape: Reverse Feed 439 XC6371 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 4 0.42±0.06 0.4 0.42±0.06 +0.03 -0.02 0.47±0.06 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 0.47±0.06 1.5±0.1 1.5±0.1 4.5±0.1 440 0.4 +0.03 -0.02 XC6371 Series ■Marking w q r 2 4 e 1 3 SOT-89-5 (TOP VIEW) SOT-89 (TOP VIEW) q Represents the Product Classification PRODUCT NAME DESIGNATOR XC6371A XC6371B XC6371C XC6371D A XC6371E XC6371F S B 4 A B X w Represents the integer of the Output Voltage and Oscillator Frequency INTEGER OF THE OUTPUT VOLTAGE 1 2 3 4 OSCILLATOR FREQUENCY（kHz） 50 100 B 1 180 1 C 2 2 D E 3 4 3 4 5 F 5 5 6 7 H K 6 7 6 7 e Represents the decimal number of the Output Voltage and Oscillator Frequency THE DECIMAL NUMBER OF OUTPUT VOLTAGE OSCILLATOR FREQUENCY（kHz） 50 100 180 0 0 0 A 1 1 1 B 2 3 2 3 2 3 C D 4 5 6 4 5 6 4 5 6 E F H 7 7 7 K 8 8 8 L 9 9 9 M r Denotes the production lot number 0 to 9, A to Z repeated(G.I.J.O.Q.W excepted) 441 XC6371 Series ■Block Diagram XC6371A∼XC6371D XC6371E and XC6371F VDD Lx VLx limiter Soft Start Buffer Vref PWM Control OSC 50/100/180KHz VSS VDD Lx VLx limiter VDD Buffer Vref VOUT Phase comp PWM Control OSC 50/100/180KHz VSS + − EXT Soft Start VOU + − EXT Chip Enable Phase comp CE 4 Note: Built-in tr.type units use the LX pin. External tr.type units use the EXT pin. The CE pin is only used with the XC6371C and XC6371D. The VOUT pin is used also for the VDD pin. ■Absolute Maximum Ratings Note: The VDD pin is only used with XC6371E and XC6371F. Built-in tr.type units use the LX pin. External tr.type units use the EXT pin. Ta=25°C PARAMETER SYMBOL RATINGS UNITS VOUT Input Voltage VOUT 12 V Lx pin Voltage VLX 12 V Lx pin Current ILX 400 mA EXT pinVoltage VEXT VSS –0.3 ~ VOUT+0.3 V EXT pin Current IEXT ±50 mA CE Input Voltage VCE 12 V Continuous Total Power Dissipation Pd 500 mW VDD Input Voltage VDD 12 V Operating Ambient Temperature Topr –30 ~ +80 °C Storage Temperature Tstg –40 ~ +125 °C ■Electrical Characteristics XC6371A501PR VOUT=5.0V,FOSC=100kHZ PARAMETER SYMBOL Output Voltage Ta=25°C MIN TYP MAX VOUT 4.875 5.000 5.125 Maximum Input Voltage VIN 10 Operation Start-up Voltage 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. 80.2 133.8 µA Supply Current 2 IDD2 Same as VST2. Apply output voltage✕1.1 to VOUT. 8.2 16.5 µA Lx Switch-On Resistance RSWON Same as IDD 1. VLX=0.4V. 1.4 2.4 Ω Lx Leakage Current ILXL No external components. VOUT=VLX=10V. 1.0 µA Oscillator Frequency FOSC Same as IDD 1. Measuring of Lx waveform. 85 100 115 kHz Maximum Duty Ratio MAXDTY Same as IDD 1. Measuring of Lx waveform. 80 87 92 % Lx Limit Voltage VLXLMT Same as IDD 1. Apply output voltage to Lx. Voltage required to produce FOSC✕2 0.7 1.3 V Efficiency EFFI Slow-Start Time TSS 20.0 ms CONDITIONS 10.0 % Measuring conditions : Unless otherwise specified, VIN=VOUT ✕ 0.6, IOUT=50mA. See Typical Application Circuits, Fig.1. 442 V V 85 4.0 UNITS XC6371 Series XC6371B501PR Ta=25°C VOUT=5.0V,Fosc=100kHz PARAMETER Output Voltage SYMBOL VOUT Maximum Input Voltage VIN CONDITIONS MIN 4.875 TYP 5.000 MAX 5.125 10 UNITS V V Operation Start-up Voltage VST1 External Components Connected.IOUT=1mA. Oscillation Start-up Voltage VST2 No external components. Apply voltage to VOUT. Supply Current 1 IDD1 Same as VST2. Apply output voltage✕0.95 to VOUT. 40.0 66.8 µA Supply Current 2 IDD2 Same as VST2. Apply output voltage✕1.1 to VOUT. 8.2 16.5 µA EXT"High" On Resistance REXTH Same as IDD 1. VEXT=–0.4V. 37.5 62.5 Ω EXT"Low" On Resistance REXTL Same as IDD 1. VEXT=0.4V. 30 50 Ω Oscillator Frequency FOSC Same as IDD1. Measuring of EXT waveform. 85 100 115 kHZ Maximum Duty Ratio MAXDTY Same as IDD1. Measuring of EXT waveform. 80 87 92 % Efficiency EFFI Slow-Start Time TSS 10.0 20.0 ms TYP 5.000 MAX 5.125 UNITS V 0.90 V 0.80 V % 85 4.0 Measuring conditions: Unless otherwise specified, VIN=VOUT✕0.6, IOUT=50mA. See Typical Application Circuits, Fig.2. XC6371C501PR VOUT=5.0V,FOSC=100kHz PARAMETER Output Voltage SYMBOL VOUT 4 Ta=25°C CONDITIONS MIN 4.875 10 Maximum Input Voltage VIN Operation Start-up Voltage VST1 External Components Connected.IOUT=1mA. 0.90 V Oscillation Start-up Voltage VST2 No external components. Apply voltage to VOUT. Lx : 10k Ω pull-up to 5V. 0.80 V Supply Current 1 IDD1 Same as VST2. Apply output voltage✕0.95 to VOUT. 80.2 133.8 µA Supply Current 2 IDD2 Same as VST2. Apply output voltage✕1.1 to VOUT. 8.2 16.5 µA Lx Switch- On Resistance RSWON Same as IDD 1. VLX=0.4V. 1.4 2.4 Ω Lx Leakage Current ILXL No external components. VOUT=VLx=10V. 1.0 µA kHZ V Osicillator Frequency FOSC Same as IDD 1. Measuring of Lx waveform. 85 100 115 Maximum Duty Ratio MAXDTY Same as IDD 1. Measuring of Lx waveform. 80 87 92 % Stand-by Current ISTB Same as IDD 1. 0.5 µA CE"High"Voltage VCEH Same as IDD 1. Existence of Lx Oscillation. CE"Low"Voltage VCEL Same as IDD 1. Disappearance of Lx Oscillation. 0.20 V CE"High"Current ICEH Same as IDD 1.VCE=VOUT✕0.95. 0.25 µA CE"Low"Current ICEL Same as IDD 1. VCE=0V. –0.25 µA Lx Limit Voltage VLxLMT Same as IDD 1. Apply output voltage to Lx. Voltage required to produce FOSC✕2. 1.3 V Efficiency EFFI Slow-Start Time TSS 20.0 ms 0.75 V 0.7 85 4.0 10.0 % Measuring conditions: Unless otherwise specified, connect CE to VOUT,VIN=VOUT✕0.6, IOUT=50mA. See Typical Application Circuits, Fig.3. 443 XC6371 XC6371D501PR 4 Series Ta=25°C VOUT=5.0V,FOSC=100kHZ PARAMETER SYMBOL CONDITIONS MIN TYP 4.875 5.000 MAX UNITS 5.125 V Output Voltage VOUT Maximum Input Voltage VIN Operation Start-up Voltage VST1 External Components Connected. IOUT=1mA. 0.90 V Oscillation Start-up Voltage VST2 No external components. Apply voltage to Vout. 0.80 V Supply Current 1 IDD1 Same as VST2. Apply output voltage✕0.95 to VOUT. 40.0 66.8 µA Supply Current 2 IDD2 Same as VST2. Apply output voltage✕1.1 to VOUT. 8.2 16.5 µA EXT "High" On Resistance REXTH Same as IDD 1. VEXT=–0.4V. 37.5 62.5 Ω EXT "Low" On Resistance REXTL Same as IDD 1. VEXT=0.4V. 30 50 Ω Oscillator Frequency FOSC Same as IDD 1. Measuring of EXT waveform. 85 100 115 kHz Maximum Duty Ratio MAXDTY Same as IDD 1. Measuring of EXT waveform. 80 87 Stand-by Current ISTB Same as IDD 1. CE"High"Voltage VCEH Same as IDD 1. Existence of Lx Oscillation. CE"Low"Voltage VCEL Same as IDD 1. Disappearance of Lx Oscillation. CE"High"Current ICEH CE"Low"Current ICEL Efficiency EFFI Slow-Start Time TSS 10 V 92 % 0.5 µA 0.20 V Same as IDD 1.VCE=VOUT✕0.95. 0.25 µA Same as IDD 1.VCE=0V. –0.25 µA 20.0 ms 0.75 V 85 4.0 10.0 % Measuring conditions: Unless otherwise specified, connect CE to VOUT,VIN=VOUT✕0.6, IOUT=50mA. See Typical Application Circuits,Fig.4. XC6371E501PR Ta=25°C VOUT=5.0V,FOSC=100kHZ PARAMETER SYMBOL CONDITIONS MIN TYP 4.875 5.000 MAX UNITS 5.125 V Output Voltage VOUT Maximum Input Voltage VIN Operation Start-up Voltage VST1 External Components Connected. IOUT=1mA. 0.90 V Oscillation Start-up Voltage VST2 No external components. Apply voltage to VOUT. 0.80 V Supply Current 1 IDD1 Same as VST2. Apply output voltage✕0.95 to VOUT. 80.2 133.8 µA Supply Current 2 IDD2 Same as VST2. Apply output voltage✕1.1 to VOUT. 8.2 16.5 µA Lx Switch-On Resistance RSWON Same as IDD 1. VLX=0.4V. 1.4 2.4 Ω Lx Leakage Current ILXL No external components. VOUT=VLX=10V. 1.0 µA 10 V Osicillator Frequency FOSC Same as IDD 1. Measuring of Lx waveform. 85 100 115 kHz Maximum Duty Ratio MAXDTY Same as IDD 1. Measuring of Lx waveform. 80 87 92 % Lx Limit Voltage VLxLMT Same as IDD 1. Apply output voltage to Lx. Voltage required to produce FOSC✕2. 0.7 1.3 V Efficiency EFFI Slow-Start Time TSS 20.0 ms 85 4.0 10.0 % Measuring conditions: Unless otherwise specified, connect VDD to Vout,VIN=VOUT✕0.6, IOUT=50mA. SeeTypical Application Circuits,Fig.5. Note: When the VDD and VOUT pins are independently used, the voltage range at the VDD pin should be 2.2V to 10V. The IC operates from VDD=0.8V. However, output voltage and oscillator frequency are properly stabilized when VDD=2.2V or higher. 444 XC6371 Series XC6371F501PR VOUT=5.0V,FOSC=100kHZ PARAMETER SYMBOL Output Voltage Ta=25°C CONDITIONS MIN TYP MAX VOUT 4.875 5.000 5.125 UNITS Maximum Input Voltage VIN 10 Operation Start-up Voltage VST1 External Components Connected. IOUT=1mA. 0.90 V Oscillation Start-up Voltage VST2 No external components. Appply voltage to VOUT. 0.80 V Supply Current 1 IDD1 Same as VST2. Apply output voltage✕0.95 to VOUT. 40.0 66.8 µA Supply Current 2 IDD2 Same as VST2. Apply output voltage✕1.1 to VOUT. 8.2 16.5 µA EXT "High" On-Resistance REXTH Same as IDD 1. VEXT=–0.4V. 37.5 62.5 Ω EXT "Low" On-Resistance REXTL Same as IDD 1. VEXT=0.4V. 30 50 Ω V V Oscillator Frequency FOSC Same as IDD 1.Measuring of EXT waveform. 85 100 115 kHz Maximum Duty Ratio MAXDTY Same as IDD 1.Measuring of EXT waveform. 85 87 92 % Efficiency EFFI Slow-Start Time TSS 85 4.0 4 % 10.0 ms 20.0 Measuring conditions: Unless otherwise specified, connect VDD to VOUT,VIN=VOUT✕0.6, IOUT=50mA. See Typical Application Circuits, Fig.6. Note: When the VDD and VOUT pins are independently used, the voltage range at the VDD pin should be 2.2V to 10V. The IC operates from VDD=0.8V. However, output voltage and oscillator frequency are properly stabilized when VDD=2.2V or higher. ■Typical Application Circuits SD SD VOUT VOUT L L VIN VIN CIN CIN SOT-89 (TOP VIEW) Tr SOT-89 (TOP VIEW) CL （Tantalum） 1 2 3 GND L SD CL CIN : 100µH (SUMIDA, CR-54) : MA2Q735 (Schottky diode; MATSUSHITA) : 16V 47µF (Tantalum capacitor; NICHCON, MCE) : 16V220µF (Alminium Electrolytic Capacitor) Fig.1 XC6371A Application CB RB 1 2 CL （Tantalum） 3 GND L : 47µH (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47µF (Tantalum capacitor; NICHCON MCE) CIN : 16V220µF (Alminium Electrolytic Capacitor) RB : 1kΩ, CB:3300pF (FOSC=100kHz) Tr : 2SC3279, 2SD1628G Fig.2 XC6371B Application 445 XC6371 Series CE CE SD SD VOUT VOUT L L 3 3 VIN 2 VIN CIN 2 1 1 (TOP VIEW) SOT-89-5 Tr CIN (TOP VIEW) SOT-89-5 CL （Tantalum） 4 CB RB 4 CL （Tantalum） 5 5 GND GND 4 L : 100µH (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47µF (Tantalum capacitor, NICHICON, MCE) L : 47µH (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47µF (Tantalum capacitor, NICHICON, MCE) CIN : 16V220µF (Alminium Electrolytic Capacitor) CIN : 16V220µF (Alminium Electrolytic Capacitor) RB : 1kΩ, CB : 3300pF (FOSC=100kHZ) Tr : 2SC3279, 2SD1628G Fig.3 XC6371C Application Fig.4 XC6371D Application SD SD VOUT VOUT L L 3 2 1 3 2 1 Tr VIN (TOP VIEW) SOT-89-5 CIN 4 VDD CL （Tantalum） 5 VIN (TOP VIEW) SOT-89-5 CIN CB RB 4 CL （Tantalum） 5 GND GND L : 100µH (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47µF (Tantalum capacitor, NICHICON, MCE) L : 47µH (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47µF (Tantalum capacitor, NICHICON, MCE) CIN : 16V220µF (Alminium Electrolytic Capacitor) CIN : 16V220µF (Alminium Electrolytic Capacitor) RB : 1kΩ,CB : 3300pF (FOSC=100kHZ) Tr : 2SC3279, 2SD1628G Fig.5 XC6371E Application 446 VDD Fig.6 XC6371F Application XC6371 Series ■Typical Performance Characteristics (1) OUTPUT VOLTAGE vs. OUTPUT CURRENT XC6371A501PR XC6371A301PR 1.2V 5.1 1.5V 2.0V 3.0V VIN=0.9V 5.0 L＝100μH（CR54）， CL＝47μF（Tantalum） Output Voltage:VOUT（V） Output Voltage:VOUT（V） L＝100μH（CR54）， CL＝47μF（Tantalum） 5.2 4.0V 4.9 4.8 3.10 1.2V 1.5V VIN=1.0V 3.05 1.8V 2.7V 3.00 2.95 2.90 0.1 1 10 100 1000 0.1 Output Current:IOUT（mA） 1 10 100 1000 Output Current:IOUT（mA） 4 (2) EFFICIENCY vs. OUTPUT CURRENT XC6371A501PR XC6371A301PR L＝100μH（CR54）， CL＝47μF（Tantalum） L＝100μH（CR54）， CL＝47μF（Tantalum） 100 100 60 3.0V VIN=0.9V 2.0V 40 1.2V 1.5V 20 2.7V Efficiency:EFFI(%) Efficiency:EFFI(%) 4.0V 80 0 80 60 VIN=0.9V 1.8 V 40 1.2V 1.5V 20 0 0.1 1 10 100 1000 0.1 Output Current:IOUT（mA） 1 10 100 1000 Output Current:IOUT（mA） (3) RIPPLE VOLTAGE vs. OUTPUT CURRENT XC6371A301PR 100 L＝100μH（CＲ54）， CL＝47μF（Tantalum） 80 Ripple Voltage:Vr（mVp-p） Ripple Voltage:Vr（mVp-p） XC6371A501PR 3.0V 2.0V 60 1.5V 1.2V 40 20 0 0.1 VIN=0.9V 1 4.0V 10 100 Output Current:IOUT (mA) 1000 100 L＝100μH（CR54）， CL＝47μF（Tantalum） 80 60 1.8V 1.5V 40 1.2V 2.7V VIN=0.9V 20 0 0.1 1 10 100 1000 Output Current:IOUT (mA) 447 XC6371 Series (4)NO LOAD, INPUT CURRENT vs. INPUT VOLTAGE XC6371A301PR XC6371A501PR L＝100μH（CR54）， CL＝47μF（Tantalum） 800 600 400 200 L＝100μH（CＲ54）， CL＝47μF（Tantalum） 500 Input Current:IIN (μA) Input Current:IIN (μA) 1000 0 400 300 200 100 0 0 1 2 3 4 5 0 Input Voltage:VIN (V) 1 2 3 Input Voltage:VIN (V) 4 (5) OPERATING START VOLTAGE/RETAIN VOLTAGE vs. OUTPUT CURRENT (6) LOAD TRANSIENT RESPONSE XC6371A501 XC6371A501 L=100μH（CR54）,C=47μF (Tantalum) IOUT=1mA-30mA VIN=3V L=100μH（CR54）,C=47μF (Tantalum) 7.0 1.6 240 1.0 VST 0.8 VHLD 0.6 0.4 180 6.0 150 Output Voltage 120 5.0 90 4.0 0.2 60 Output Current 30 0.0 0 10 20 Output Current:IOUT (mA) 448 30 0 3.0 Time(20msec/div) Output Current:IOUT(mA) 210 1.2 Output Voltage:VOUT(V) Operating Start Voltage Retain Voltage:VST,VHLD (V) 1.4 XC6371 Series (7) OUTPUT VOLTAGE vs. OUTPUT CURRENT XC6371B301（3V,100kHz） 3.2 3.1 VIN=2.4V 3.0 2.9 0.9V 1.8V 1.5V 1.2V 2.8 L=47μH（CR105）, RB=500Ω, CB=0.01μF 5.2 Output Voltage:VOUT (V) Output Voltage:VOUT (V) XC6371B501（5V,100kHz） L=47μH（CR105）, RB=500Ω, CB=0.01μF 2.7 5.1 VIN=3.0V 5.0 4.9 2.5V 2.0V 1.5V 4.8 4.7 0 100 200 300 400 500 600 0 100 Output Current:IOUT (mA) 200 300 400 500 600 Output Current:IOUT (mA) 4 (8) EFFICIENCY vs. OUTPUT CURRENT XC6371B301（3V,100kHz） XC6371B501（5V,100kHz） L=47μH（CR105）, RB=500Ω, CB=0.01μF 100 L=47μH（CR105）, RB=500Ω, CB=0.01μF 100 VIN=3.0V 80 60 Efficiency:EFFI (%) Efficiency:EFFI (%) VIN=2.4V 1.8V 1.5V 1.2V 40 0.9V 20 80 60 2.5V 2.0V 1.5V 40 20 0 0 0 100 200 300 400 500 600 0 100 Output Current:IOUT (mA) 200 300 400 500 600 Output Current:IOUT (mA) (9) RIPPLE VOLTAGE vs. OUTPUT CURRENT XC6371B301（3V,100kHz） 150 1.8V 100 0.9V VIN=2.4V 50 0 1.5V 0 100 200 300 400 500 Output Current:IOUT (mA) 600 L=47μH（CR105）, RB=500Ω, CB=0.01μF 200 Ripple Voltage:Vr (mVp-p) 200 Ripple Voltage:Vr (mVp-p) XC6371B501（5V,100kHz） L=47μH（CR105）, RB=500Ω, CB=0.01μF 150 VIN=3.0V 2.5V 2.0V 100 1.5V 50 0 0 100 200 300 400 500 600 Output Current:IOUT (mA) <External components> CIN=100µF (Electrolytic), CL=47µF (Tantalum) ✕ 2, SD:MA735, Tr:2SD1628G 449 XC6371 Series (10) LOAD TRANSIENT RESPONSE IOUT=1mA-30mA VIN=2.0V L=47μH（CR54）,RB=1kΩ, CB=3300pF 4.0 240 3.5 180 Output Voltage 3.0 120 2.5 4 60 Output Current:IOUT (mA) Output Voltage:VOUT (V) XC6371B301 （3V,100kHz） Output Current 2.0 0 Time (20msec/div) XC6371B501 （5V,100kHz） IOUT=1mA-30mA VIN=3.0V L=47μH（CR54）,RB=1kΩ, CB=3300pF Output Voltage:VOUT (V) 180 5.5 Output Voltage 120 5.0 60 4.5 Output Current 4.0 0 Time (20msec/div) (External Components) CIN=47µF (Tantalum) CL=47µF (Tantalum) ✕ 2 SD:MA735 Tr :2SD1628G 450 Output Current:IOUT (mA) 240 6.0