XC9128/XC9129 Series 1A Driver Transistor Built-In, Step-Up DC/DC Converters ETR0411-006 GENERAL DESCRIPTION The XC9128/XC9129 series are synchronous step-up DC/DC converters with a 0.2 (TYP.) N-channel driver transistor and a synchronous 0.2 (TYP.) P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 1.0A by reducing ON resistance of the built-in transistors. With a high switching frequency of 1.2MHz, a small inductor is selectable making the series ideally suited for applications requiring low profile or space saving solutions. With the MODE pin, the series provides mode selection of PWM control or PFM/PWM automatic switching control. In the PWM/PFM automatic switching mode, the series switches from PWM to PFM to reduce switching loss when load current is small. When load current is large, the series switches automatically to the PWM mode so that high efficiency is achievable over a wide range of load conditions. The series also provides small output ripple from light to large loads by using the built-in circuit which enables the smooth transition between PWM and PFM. With a adaptor enable function of the XC9128 series, when a voltage higher than the input voltage is applied to the output, the input and the output become isolated making it possible for the IC to work in parallel with the likes of an AC adaptor. APPLICATIONS Digital audio equipment Digital cameras, Video equipment Computer Mice Various multi-function power supplies using alkali cells (1 to 3 cells), nickel hydride batteries, or single lithium cells FEATURES High Efficiency, Large Current Step-Up Converter Output Current : 150mAVOUT=3.3V, VIN=0.9V 500mAVOUT=3.3V, VIN=1.8V Input Voltage Range : 0.8V~6.0V Output Voltage Setting : 1.8V~5.3V (Externally set) Range Set up freely with a reference voltage supply of 0.45V (0.010V) & external components Oscillation Frequency : 1.2MHz (Fixed oscillation frequency accuracy 15%) Input Current : 1.0A Maximum Current Limit : 1.2A (MIN.), 2.0A (MAX.) Control : PWM, PWM/PFM control externally selectable High Speed :100mV @ VOUT=3.3V, Transient Response VIN=1.8V, IOUT=10mA100mA Protection Circuits : Thermal shutdown : Integral latch method (Over current limit) Soft-Start Time : 5ms (TYP.) internally set Ceramic Capacitor Compatible Adaptor Enable Function (XC9128 series) Packages : MSOP-10, USP-10B, SOP-8 Flag Output (XC9128 series) : Open-drain output TYPICAL APPLICATION CIRCUIT CIN 1 VIN L EN FO 2 3 4 5 PGND Lx BAT EN FO VOUT 10 MODE 9 8 7 6 RFB2 CFB RFB1 TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs. Output Current XC9128B45CDx VOUT=5.0V, fOSC=1.2MHz VOUT MODE FB AGND AEN/ CL (ceramic) 100 80 Efficiency : EFFI (%) 60 L=4.7H (CDRH4D28C), CIN=10F, CL=32F 3.7V 40 20 0 0.1 VIN=1.8V PWM(MODE:H) PWM/PFM(MODE:L) 1 10 100 Output Current : IOUT (mA) Output Current: IOUT (mA) 1000 1/13 XC9128/XC9129 Series PIN CONFIGURATION PGND 1 Lx 2 BAT 3 EN 4 FO 5 MSOP-10 (TOP VIEW) 10 VOUT 9 MODE 8 FB 7 AGND 6 AEN/ FO 5 EN 4 BAT 3 Lx 2 PGND 1 USP-10B (BOTTOM VIEW) XC9128 Series 8 VOUT 6 NC 7 AGND 8 FB 9 MODE 10 VOUT USP-10B (BOTTOM VIEW) XC9129 Series 6 AEN/ 7 AGND 8 FB 9 MODE 10 VOUT PGND 1 NC 5 EN 4 Lx 2 7 MODE 6 FB BAT 3 Lx 2 PGND 1 BAT 3 EN 4 SOP-8 (TOP VIEW) Under Development 5 AGND PIN ASSIGNMENT MSOP-10* 1 2 3 4 5 6 7 8 9 10 PIN NUMBER USP-10B* USP-10B* (XC9128) (XC9129) 1 1 2 2 3 3 4 4 5 6 7 7 8 8 9 9 10 10 5, 6 SOP-8 ** 1 2 3 4 5 6 7 8 PIN NAME PGND Lx BAT EN FO AEN/ AGND FB MODE VOUT NC FUNCTION Power Ground Output of Internal Power Switch Battery Input Chip Enable Flag Output Adaptor Enable Analog Ground Output Voltage Monitor Mode Switch Output Voltage No Connection * For MSOP-10 and USP-10B packages, please short the GND pins (pins 1 and 7). *The dissipation pad for the USP-10B package should be solder-plated following the 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 Ground pins (pins 1 and 7). ** For SOP-8 package, please short the GND pins (pins 1 and 5). 2/13 XC9128/XC9129 Series 1. EN, AEN/ Pin Function XC9128 Series EN PIN LH H H H L L FUNCTION CHART AEN/ PIN L HL HL H L H FB PIN VOLTAGE Lower than 0.45x0.8V Higher than 0.45x0.95V IC OPERATIONAL STATE Operation Operation Operation Step-Up Operation Shut-Down Disable Disable SOFT-START FUNCTION Available Available Not Available - * Do not leave the EN and AEN/ Pins open. XC9129 Series EN PIN H L IC OPERATIONAL STATE Operation Disable * Do not leave the EN Pin open. 2. MODE Pin Function XC9128/XC9129 Series MODE PIN H L FUNCTION PWM Control PWM/PFM Automatic Switching Control PRODUCT CLASSIFICATION Ordering Information XC9128- XC9129- *1) *1) MSOP-10, USP-10B USP-10B SOP-8 (Under Development) DESIGNATOR DESCRIPTION Transistor Built-In, Output Voltage Freely Set (FB voltage), Integral Protection Type Reference Voltage Oscillation Frequency SYMBOL B D 45 C AR AR-G DR DR-G SR DESCRIPTION With integral protection Without integral protection Fixed reference voltage 0.45 =4, =5 1.2MHz MSOP-10 MSOP-10 (Halogen & Antimony free) USP-10B USP-10B (Halogen & Antimony free) SOP-8 (under development) - Packages Taping Type (*2) (*1) (*2) 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-) 3/13 XC9128/XC9129 Series BLOCK DIAGRAM XC9128 Series * XC9129 Series The XC9129 series does not have AEN/ pin and FO pin. ABSOLUTE MAXIMUM RATINGS Ta=25 PARAMETER VOUT Pin Voltage AEN/ Pin Voltage (*2) FO Pin Voltage (*2) FO Pin Current (*2) FB Pin Voltage BAT Pin Voltage MODE Pin Voltage EN Pin Voltage LX Pin Voltage LX Pin Current MSOP-10 USP-10B Power Dissipation SOP-8 (Under Development) Operating Temperature Range Storage Temperature Range *1: When implemented on a PCB. *2: The XC9129 series does not have AEN/ pin and FO pin. These pins are available only in the XC9128 series. SYMBOL VOUT VAEN/ VFO IFO VFB VBAT VMODE VEN VLx ILx Pd Topr Tstg RATINGS - 0.36.5 - 0.36.5 - 0.36.5 10 - 0.36.5 - 0.36.5 - 0.36.5 - 0.36.5 - 0.3VOUT+0.3 2000 350 (*1) 150 300 - 40+85 - 55+125 UNITS V V V mA V V V V V mA mW o o C C AGND, PGND is the standard voltage for all of voltages. 4/13 XC9128/XC9129 Series ELECTRICAL CHARACTERISTICS XC9128/XC9129 Series PARAMETER Input Voltage FB Voltage Output Voltage Setting Range Operation Start Voltage SYMBOL VIN VFB VOUTSET VST1 CONDITIONS - Topr=25 oC MIN. (*8) TYP. 0.45 0.8 0.7 3 30 28 2 2 1.20 92 250 93 0.20 0.20 (*1) 1 1.5 3.5 MAX. 6.0 0.46 5.3 0.8 0.9 (*1) 6 80 78 10 10 1.38 96 0 400 0.35 (*1) 0.35 (*1) 2.0 - UNITS V V V V V V V mA A A A MHz % % mA % A A ms CIRCUIT Oscillation Start Voltage Operation Hold Voltage Supply Current 1 Supply Current 2 (XC9128) Supply Current 2 (XC9129) Input Pin Current Stand-by Current Oscillation Frequency Maximum Duty Cycle Minimum Duty Cycle PFM Switching Current Efficiency (*2) LX SW "Pch" ON Resistance LX SW "Nch" ON Resistance LX Leak Current Current Limit (*5) (*6) VST2 VHLD IDD1 IDD2 IBAT ISTB fOSC DMAX DMIN IPFM EFFI RLxP RLxN ILXL ILIM tLAT VOUT=VIN=3.3V, VFO=0V Voltage to start oscillation during VFB= 0.46V 0.44V Connect to external components, RL=1k Connect to external components, RL=33 Voltage to start oscillation during VIN=0V 1V, RL=1k Connect to external components, RL=1k VIN = VOUT =3.3V, VFB=0.45x0.9 VIN = VOUT =3.3V VFB=0.45x1.1 (Oscillation stop), VMODE=0V VIN =3.3V, VOUT =1.8V, VEN=0V VIN = VOUT =3.3V, VEN=0V (*8) VIN = VOUT =3.3V, VFO=0V , VFB=0.45x0.9 VIN = VOUT =3.3V, VFO=0V (*8), VFB=0.45x0.9 VIN = VOUT =3.3V, VFO=0V (*8), VFB=0.45x1.1 Connect to external components, VMODE=0V, RL=330 Connect to external components, RL=33 VIN=VLx=VOUT+50mV, VFB=0.45x1.1 (*3) VIN=VOUT=3.3V, Lx =50mV (*4) VIN=VOUT= VLX, VFB=0V VOUT>2.5V Time to stop oscillation during RL=33 3.3, VFO=L H Time to stop oscillation during RL=33 3.3 Time to start oscillation during VEN=0V VIN at VIN = VOUT =3.3V, VFO=0V, VFB=0.45x0.95 VIN = VOUT =3.3V, VFO=0V, VFB=0.45x0.95 Time to start oscillation during VAEN/=VIN0V. VIN = VOUT =3.3V, VFO=0V, VFB=0.45x0.8 Time to start oscillation during VAEN/=VIN0V VIN =3.3V Voltage to stop oscillation during VOUT=1.56V1.3V VIN =VOUT=3.3V, VFO=0.25V VIN = VOUT =3.3V, VEN=0V ,VFO=1V 0.44 1.8 1.02 85 1.2 - Integral Latch Time (XC9128) Integral Latch Time (XC9129) (*6) Soft-Start Time 1 tSS1 1.7 5.3 10.5 ms Soft-Start Time 2 (*7) tSS2 - 0.02 0.04 ms Soft-Start Time 3 (*7) Thermal Shutdown Temperature Hysteresis Width Output Voltage Drop Protection (*6) FO Output Current (*7) FO Leakage Current (*7) tSS3 1.7 5.3 10.5 ms o o TTSD THYS VLVP IFO_OUT IFO_Leak 1.3 1.3 - 150 20 1.48 1.7 0 1.56 2.2 1 C C V mA A 5/13 XC9128/XC9129 Series ELECTRICAL CHARACTERISTICS (Continued) XC9128/XC9129 Series (Continued) PARAMETER EN "H" Voltage SYMBOL VENH CONDITIONS VIN =VOUT=3.3V, VFO=0V Voltage to start oscillation during VFB=0.45x0.9, VEN= 0.2V0.65V VIN = VOUT =3.3V, VFO=0V (*8) EN "L" Voltage VENL Voltage to stop oscillation during VFB=0.45x0.9, VEN= 0.65V0.2V RL =330, Voltage operates at PWM control RL =330, Voltage operates at PFM control VIN = VOUT =3.3V, VFO=0V Voltage to start oscillation during VAEN/= 0.9V0.7V VIN=VOUT=VFB=VEN=6.0V VIN=VOUT=VFB=6.0V, VEN=0V VIN=VOUT=VFB=VMODE=6.0V VIN=VOUT=VFB=6.0V, VMODE=0V VIN=VOUT=VFB=VAEN/=6.0V VIN=VOUT=6.0V, VEN=0V, VAEN/=0V VIN=VOUT=VFB=6.0V VIN=VOUT=6.0V, VFB=0V 0.2 V (*8) Topr=25 oC MIN. 0.65 TYP. MAX. 6.0 UNITS V CIRCUIT MODE "H" Voltage MODE "L" Voltage AEN/ Voltage (*7) VMODEH VMODEL VAEN/ IENH IENL IMODEH IMODEL IAEN/H IAEN/L IFBH IFBL 0.65 AGND 0.7 -0.1 -0.1 -0.1 -0.1 0.8 - 6.0 0.2 0.9 0.1 0.1 0.1 0.1 *8 *8 V V V A A A A A A A A EN "H" Current EN "L" Current MODE "H" Current MODE "L" Current AEN/ "H" Current AEN/ "L" Current FB "H" Current FB "L" Current Test Conditions: (*7) (*7) For the Circuit No.1, unless otherwise stated, VIN=1.8V, VEN=VMODE=VFO=3.3V, VAEN/=0V For the Circuit No.3, unless otherwise stated, VIN=1.8V, VOUT=VEN=VMODE=3.3V, FB=0V For the Circuit No.2, unless otherwise stated, VIN=1.8V, VFB =0V, VEN=VMODE=3.3V, VAEN/=0V For the Circuit No.4, unless otherwise stated, VIN=1.8V, VFB=0V, VEN=VMODE=Vpull=VFO=3.3V, VAEN/ =0V For the Circuit No.5, unless otherwise stated, VIN=3.3V, VAEN/=0V For the Circuit No.7, unless otherwise stated, VEN=VMODE=3.3V External Components: *8 *8 *8 For the Circuit No.6, unless otherwise stated, VEN=VMODE=Vpull=VFO=3.3V, VFB=0V For the Circuit No.1, RFB1=270k, RFB2=43k, CFB=12pF, L=4.7HLTF5022 TDK, CL1=22Fceramic, CL2=10 Fceramic, CIN=10Fceramic For the Circuit No.2,3, CIN=1Fceramic For the Circuit No.4,6, CIN=1Fceramic, Rpull=300 For the Circuit No.5, CIN=1Fceramic, COUT=1Fceramic For the Circuit No.7, CIN=1Fceramic, COUT=1Fceramic, SBD =XBS304S17TOREX, Rpull=0.5 * * * * * * 1 : Designed value 2 : Efficiency ={(output voltage) X (output current)} / {(input voltage) X (input current)} X 100 3 : LX SW "P-ch" ON resistance=VLx-VOUT pin test voltage/100mA 4 : Testing method of LX SW "N-ch" ON resistance is stated at test circuits. 5 : Current flowing through the Nch driver transistor is limited. 6 : The XC9128D/XC9129D series does not have integral latch protection and VLVP function. This is only available with the XC9128B/XC9129B series. 7 : The XC9129 series does not have FO and AEN/ pins. 8 : The XC9129 series does not have FO and AEN/ pins. These pins are only available in the XC9128 series. The AEN/FO functions are only effective for the test of the XC9128 series. * * 6/13 XC9128/XC9129 Series TYPICAL APPLICATION CIRCUIT
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