XC6371/XC6372 Series ETR0402_004 PWM,PWM/PFM Controlled Step-up DC/DC Converters GreenOperation Compatible GENERAL DESCRIPTION The XC6371/XC6372 series is a group of PWM controlled and PWM/PFM controlled step-up DC/DC converters. The built-in 1.4 switching transistor type enables a step-up circuit to be configured using only three components, a coil, a diode, and a capacitor. Output voltage can be selectable in the range from 2.0V to 7.0V in increments of 0.01V (accuracy:2.5%). Oscillation frequency is also selectable from 50kHz, 100kHz, and 180kHz (accuracy:15%) for the XC6371 and the XC6372 series. Soft-start time is internally set and offers protection against in-rush currents when the power is switched on and prevents voltage overshoot. Packages with CE (chip enable) pin are also available which can reduce the IC power consumption during during stand-by mode. The XC6371 series is the standard PWM controlled products. The control of the XC6372 series switches from PWM to PFM control during light loads when automatically switching is selected and the series is highly efficient from light loads to large output currents. APPLICATIONS FEATURES Cellular phones, Pagers Operation Start Voltage Range : 0.9V~10V Output Voltage Range : 2.0V~7.0V (0.1V increments) Highly Accurate : 2.5% Oscillation Frequency : 50kHz, 100kHz, 180kHz (15%) Maximum Output Currents : 100mA(TYP.) @ VIN=3.0V, VOUT=5.0V * Highly Efficient : 85%(TYP.) @ VIN=3.0V, VOUT=5.0V * Built-in switching transistor. CE pin type (XC6371C, XC6372C) Phase compensation and soft start-up circuits built-in CMOS Low Power Consumption Packages : SOT-89, SOT-89-5, USP-6B Environmentally Friendly: EU RoHS Compliant, Pb Free * Performance depends on external components and PCB layout. Palmtops Cameras, Video recorders Portable products TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS 1/17 XC6371/XC6372 Series PIN CONFIGURATION *The dissipation pad for the USP-6B package should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the pin No.1. PIN ASSIGNMENT XC6371/XC6372A PIN NUMBER SOT-89 USP-6B 1 2 3 6 1 4 2, 3, 5 PIN NAME FUNCTION VSS VOUT Lx NC Ground Output Voltage Monitor/IC Internal Power Supply Switch No Connection PIN NAME FUNCTION XC6371/XC6372C PIN NUMBER 2/17 SOT-89-5 USP-6B 5 2 4 3 6 1 4 3 VSS VOUT Lx CE Ground Output Voltage Monitor/IC Internal Power Supply Switch Chip Enable 1 2, 5 NC No Connection XC6371/XC6372 Series PRODUCT CLASSIFICATION Selection Guide START PWM XC6371 PWM/PFM XC6372 Standard XC6371A Chip Enable XC6371C Standard XC6372A Chip Enable XC6372C Ordering Information *1 XC6371-( ) : PWM controlled (*1) : PWM/PFM switching control XC6372- DESIGNATOR DESCRIPTION SYMBOL Type of DC/DC Converter A C Output Voltage Integer Oscillation Frequency 0 1 2 PR - Packages Taping Type (*2) PR-G DR DR-G (*1) (*2) DESCRIPTION 3-pin DC/DC converter with built-in switching transistor Stand-by capability with built-in switching transistor e.g. VOUT=3.5V=3, =5 50kHz 100kHz 180kHz SOT-89 (XC6371/72 A type) SOT-89-5 (XC6371/72 C type) SOT-89 (XC6371/72 A type) SOT-89-5 (XC6371/72 C type) USP-6B USP-6B The "-G" suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant. The device orientation is fixed in its embossed tape pocket. For reverse orientation, please contact your local Torex sales office or representative. (Standard orientation: R-, Reverse orientation: L-) 3/17 XC6371/XC6372 Series BLOCK DIAGRAMS XC6371/XC6372A, C (The VOUT pin serves also as VDD) ( p ) Lx VLx l imi ter Buffer VDD Vref PWM Control OSC 50/100/180KHz VSS Soft Start VOUT Phase comp + EXT Chip Enable CE Note: The CE pin is only used with the XC6371C. XC6371/72/73E VDD VDD Lx VLx l imi ter Buffer VSS PWM Control OSC 50/100/180KHz Soft Start Vref Phase comp VOUT + EXT Note: Built-in transistor type units use the Lx pin. ABSOLUTE MAXIMUM RATINGS Ta=25 4/17 PARAMETER VOUT Input Voltage LX pin Voltage LX pin Current CE Input Voltage SOT-89, SOT-89-5 Power Dissipation USP-6B VDD Input Voltage Operating Temperature Range SYMBOL VOUT VLX ILX VCE Storage Temperature Range Pd RATINGS 12 12 400 12 500 UNITS V V mA V mW VDD Topr 100 12 -30~80 V Tstg -40~125 XC6371/XC6372 Series ELECTRICAL CHARACTERISTICS VOUT=5.0V, FOSC=100kHZ XC6371/72A501 PARAMETER SYMBOL CONDITIONS Output Voltage VOUT Maximum Input Voltage VIN Operation Start Voltage VST1 External Components Connected, IOUT=1mA No external components. Apply voltage to VOUT Oscillation Start Voltage VST2 Lx : 10k pull-up to 5V (*1) No Load Input Current IIN VIN=VOUTx0.8, IOUT=0mA Same as VST2, Supply Current 1 IDD1 Apply output voltagex0.95 to VOUT Same as VST2, Supply Current 2 IDD2 Apply output voltagex1.1 to VOUT Lx Switch-On RSWON Same as IDD1, VLX=0.4V Resistance Lx Leak Current ILXL No external components. VOUT=VLX=10V Oscillation Frequency FOSC Same as IDD1. Measuring of Lx waveform Maximum Duty Ratio MAXDTY Same as IDD1. Measuring of Lx waveform PFM Duty Ratio (*4) PFMDTY Same as IDD1. Measuring of Lx waveform Same as IDD1. Apply output voltage to Lx, Lx Limit Voltage VLXLMT Voltage required to produce FOSCx2 Efficiency EFFI Slow-Start Time TSS Ta=25 MAX. UNITS 5.125 V V 0.90 V MIN. 4.875 10 - TYP. 5.000 - - - 0.80 V - 12.8 25.7 A - 80.2 133.8 A - 8.2 16.5 A - 1.4 2.4 85 80 10 100 87 17 1.0 115 92 25 A kHz % % 0.7 - 1.3 V 4.0 85 10.0 20.0 % ms NOTE: Unless otherwise stated, VIN=VOUTx0.6, IOUT=50mA. See Typical Application Circuits, Circuit1 *1: The Schottky diode (SD) must be type MA735, with reverse current (IR)<1.0A at reverse voltage (VR)=10.0V.(XC6372A) *2: "Supply Current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which results in less average power consumption. The current actually provided by an external VIN source is represented by "No Load Input Current (IIN)". *3: When PWM operates at PWM Mode. *4: When PFM operates at PFM Mode.(XC6372A) 5/17 XC6371/XC6372 Series ELECTRICAL CHARACTERISTICS (Continued) VOUT=5.0V, FOSC=100kHz XC6371/72C501 PARAMETER Output Voltage Maximum Input Voltage Operation Start Voltage SYMBOL VOUT VIN VST1 Operation Start Voltage VST2 No Load Input Current IIN Supply Current 1 IDD1 Supply Current 2 IDD2 CONDITIONS External Components Connected, IOUT=1mA No external components. Apply voltage to VOUT, Lx : 10k pull-up to 5V (*1) VIN=VOUTx0.8, IOUT=0mA Same as VST2, Apply output voltagex0.95 to VOUT Same as VST2, Apply output voltagex1.1 to VOUT Ta=25 MIN. 4.875 10 - TYP. 5.000 - MAX. 5.125 0.90 UNITS V V V - - 0.80 V - 12.8 25.7 A - 80.2 133.8 A - 8.2 16.5 A Lx Switch-On Resistance Lx Leak Current Oscillation Frequency Maximum Duty Ratio (*4) PFM Duty Ratio Stand-by Current CE "High" Voltage CE "Low" Voltage CE "High" Current CE "Low" Current RSWON Same as IDD1, VLx=0.4V - 1.4 2.4 ILXL FOSC MAXDTY PFMDTY ISTB VCEH VCEL ICEH ICEL 85 80 10 0.75 - 100 87 17 - 1.0 115 92 25 0.5 0.20 0.25 -0.25 A kHZ % % A V V A A Lx Limit Voltage VLxLMT No external components, VOUT =VLX=10V Same as IDD1, Measuring of Lx waveform Same as IDD1, Measuring of Lx waveform Same as IDD1, Measuring of Lx waveform Same as IDD1 Same as IDD1, Lx Oscillation start Same as IDD1, Lx Oscillation stop Same as IDD1, VCE=VOUTx0.95 Same as IDD1, VCE=0V Same as IDD1, Apply output voltage to Lx, Voltage required to produce FOSCx2 0.7 - 1.3 V Efficiency Slow-Start Time EFFI TSS 4.0 85 10.0 20.0 % ms NOTE: Unless otherwise stated, connect CE to VOUT, VIN=VOUTx0.6, IOUT=50mA. See Typical Application Circuits, Circuit 2. *1: The Schottky diode (SD) must be type MA735, with reverse current (IR)<1.0A at reverse voltage (VR)=10.0V.(XC6372C) *2: "Supply Current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which results in less average power consumption. The current actually provided by an external VIN source is represented by "No Load Input Current (IIN)". *3: When PWM operates at PWM Mode. *4: When PFM operates at PFM Mode.(XC6372C) 6/17 XC6371/XC6372 Series TYPICAL APPRICATION CIRCUITS Circuit 1: XC6372A series LL :: 100H 100H (CR54, (CR54,SUMIDA) SUMIDA) SD : MA2Q735 (Schottky Diode; MATUSHITA) CL : 16V47F (Tantalum Capacitor, NICHICHEMI MCE) Circuit 2: XC6372C series L : 100H (CR54, SUMIDA) SD : MA2Q735 (Schottky Diode; MATUSHITA) CL : 16V 47F (Tantalum Capacitor, NICHICHEMI MCE) 7/17 XC6371/XC6372 Series TYPICAL PERFORMANCE CHARACTERISTICS (1) Output Voltage vs. Output Current XC6371A501PR XC6371A301PR 1.2V 5.1 1.5V 2.0V VIN=0.9V 3.0V 5.0 L100HCR54CL47FTantalum Output Voltage:VOUTV Output Voltage:VOUTV L100H(CR54),CL47F(Tantalum) 5.2 4.0V 4.9 4.8 3.10 1.2V 2.7V 3.00 2.95 1 10 100 1000 0.1 Output Current:IOUTmA VIN=0.9V 5.0 1.5V 2.0V 3.0V 4.0V 4.9 Output Voltage:VOUTV 1.2V 5.1 1 0 100 1000 XC6372A301PR L100H C54 CL47F Tantalum 5.2 1 Output Current:IOUTmA XC6372A501PR Output Voltage:VOUTV 1.8V 2.90 0.1 L100H C54 CL47F Tantalum 3.10 1.2V 3.05 VIN=0.9V 3.00 1.5V 1.8V 2.7V 2.95 2.90 4.8 0.1 8/17 1.5V VIN=1.0V 3.05 1 10 100 Output Current:IOUT (mA) 1000 1000 0.1 1 10 100 Output Current:IOUT (mA) 1000 XC6371/XC6372 Series TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (2) Efficiency vs. Output Current XC6371A501PR XC6371A301PR L100H(CR54),CL47F(Tantalum) L100H(CR54),CL47F(Tantalum) 100 100 4.0V 2.7V 80 80 3.0V VIN=0.9V 2.0V 40 1.2V 1.5V 20 0 0.1 1 10 100 Output Current:IOUTmA 1000 1000 60 Efficiency:EFFI(%) Efficiency:EFFI(%) 60 VIN=0.9V 1.8 V 40 1.2V 1.5V 20 0 0.1 1 10 100 1000 1000 Output Current:IOUTmA 9/17 XC6371/XC6372 Series TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (3) Ripple Voltage vs. Output Current Ripple Voltage:VrmVp-p XC6371A301PR 10/17 100 L100H(CR54),CL47F(Tantalum) 80 60 1.8V 1.5V 40 1.2V 2.7V VIN=0.9V 20 0 0.1 1 10 100 Output Current:IOUT (mA) 1000 XC6371/XC6372 Series TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (4) No Load Input Current vs. Input Voltage XC6371A301PR L100H C54CL47F Tantalum Input Current:IIN (A) 500 400 300 200 100 0 0 1 2 3 Input Voltage:VIN (V) XC6372A501PR L100H C54CL47F Tantalum Input Current:IIN (A) 200 150 100 50 0 0 1 2 3 4 5 Input Voltage:VIN (V) 11/17 XC6371/XC6372 Series TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (5) Operation Start Voltage / Hold Voltage vs. Output Current (6) Load Transient Response 12/17 XC6371/XC6372 Series PACKAGING INFORMATION SOT-89 SOT-89-5 USP-6B 13/17 XC6371/XC6372 Series PACKAGING INFORMATION (Continued) USP-6B Reference Pattern Layout 14/17 USP-6B Reference Metal Mask Design XC6371/XC6372 Series MARKING RULE [XC6371/XC6372] represents product series MARK A A PRODUCT SERIES XC6371A XC6371C OUTPUT VOLTAGE (V) 1 2 SOT-89 (TOP VIEW) MARK 1 1 PRODUCT SERIES XC6372A XC6372C represents integer of output voltage and oscillation frequency SOT-89, SOT-89-5 3 1.x 2.x 3.x 4.x 5.x 6.x 7.x 50kHz B C F E F H K OSCILLATION FREQUENCY 100kHz 180kHz 1 1 2 2 3 3 4 4 5 5 6 6 7 7 represents decimal number of output voltage and oscillation frequency OUTPUT VOLTAGE (V) SOT-89-5 (TOP VIEW) x.0 x.1 x.2 x.3 x.4 x.5 x.6 x.7 x.8 x.9 50kHz 0 1 2 3 4 5 6 7 8 9 OSCILLATION FREQUENCY 100kHz 180kHz 0 A 1 B 2 C 3 D 4 E 5 F 6 H 7 K 8 L 9 M represents production lot number 0 to 9, A to Z repeated (G, I, J, O, Q, W excluded). 15/17 XC6371/XC6372 Series MARKING RULE (Continued) [XC6371/XC6372] (Continued) USP-6B represents product series MARK 5 PRODUCT SERIES XC6371xxxxDx 2 XC6372xxxxDx represents product classification MARK A USP-6B (TOP VIEW) PRODUCT SERIES XC6371A XC6371C C represents output voltage (ex.) MARK OUTPUT VOLTAGE (V) 3 3 3.3 5 0 5.0 represents oscillation frequency MARK 0 OSCILLATION FREQUENCY (kHz) 50 1 100 2 180 represents production lot number 0 to 9, A to Z repeated (G, I, J, O, Q, W excluded) Note: No character inversion used. 16/17 XC6371/XC6372 Series 1. The products and product specifications contained herein are subject to change without notice to improve performance characteristics. Consult us, or our representatives before use, to confirm that the information in this datasheet is up to date. 2. We assume no responsibility for any infringement of patents, patent rights, or other rights arising from the use of any information and circuitry in this datasheet. 3. Please ensure suitable shipping controls (including fail-safe designs and aging protection) are in force for equipment employing products listed in this datasheet. 4. The products in this datasheet are not developed, designed, or approved for use with such equipment whose failure of malfunction can be reasonably expected to directly endanger the life of, or cause significant injury to, the user. (e.g. Atomic energy; aerospace; transport; combustion and associated safety equipment thereof.) 5. Please use the products listed in this datasheet within the specified ranges. Should you wish to use the products under conditions exceeding the specifications, please consult us or our representatives. 6. We assume no responsibility for damage or loss due to abnormal use. 7. All rights reserved. No part of this datasheet may be copied or reproduced without the prior permission of TOREX SEMICONDUCTOR LTD. 17/17