XC9142C18CMR-G

XC9141/XC9142 Series ETR04018-002 Load Disconnection Function, 0.8A Step-up DC/DC Converters ☆GreenOperation-compatible ■GENERAL DESCRIPTION XC9141/XC9142 series are synchronous step-up DC/DC converters with a 0.3Ω(TYP.) N-channel driver transistor and a 0.3Ω(TYP.) synchronous P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 0.8A by reducing ON resistance of the built-in transistors. The series are able to start operation under the condition which has 0.9V input voltage to generate 3.3V output voltage with a 100Ω load resistor, suitable for mobile equipment using only one Alkaline battery or one Nickel metal hydride battery. The output voltage can be set from 1.8V to 5.5V (±2.0%) in steps of 0.1V.With the built-in oscillator, either 1.2MHz or 3.0MHz can be selected for suiting to your particular application. During the devices enter stand-by mode, A, D types prevent the application malfunction by CL Discharge Function which can quickly discharge the electric charge at the output capacitor (CL). B, E types is able to drive RTC etc. by Bypass Switch Function to maintain continuity between the input and output. C, F types is able to connect in parallel with other power supplies by Load Disconnection Function which breaks continuity between the input and output. ■APPLICATIONS ■FEATURES ●Portable equipment ●Beauty & health equipment ●Wearable devices ●Game & Hobby ●PC Peripherals ●Devices with 1~3 Alkaline, 1~3 Nickel Hydride, 1 Lithium and 1 Li-ion Input Voltage Range Fixed Output Voltage Oscillation Frequency Input Current Output Current Control Mode Selection Load Transient Response Protection Circuits Functions Output Capacitor Operating Ambient Temperature Package Environmentally Friendly ■TYPICAL APPLICATION CIRCUIT : 0.65V～6.0V : 1.8V～5.5V (0.1V increments) : 1.2MHz (±15%), 3.0MHz (±20%) : 0.8A : 500mA @VOUT=5.0V, VBAT=3.3V (TYP.) 350mA @VOUT=3.3V, VBAT =1.8V (TYP.) : PWM (XC9141 Series) or Auto PWM/PFM (XC9142 Series) : 100mV@VOUT=3.3V, VBAT =1.8V, IOUT=1mA→200mA(tr=5μs) : Over-current limit Integral latch method (D,E,F type) Output short-circuit protection (D,E,F type) : Soft-start Load Disconnection Function (A,C,D,F type) CL Auto Discharge Function (A,D type) Bypass Switch Function (B,E type) : Ceramic Capacitor : -40℃～+85℃ : SOT-25,USP-6C,WLP-6-01 : EU RoHS Compliant, Pb Free ■TYPICAL PERFORMANCE CHARACTERISTICS XC9141A33C / XC9142A33C L=4.7μH(LQH5BPN4R7NT0L) CIN=10μF(GRM188R60J106M),CL=10μF(GRM188R60J106M) L=4.7μH Lx VOUT 100 VOUT 90 CE CL=10μF CE VB AT CIN =10μF BAT GND Efficiency : EFFI [%] 80 70 60 V BAT =0.9V V BAT =1.2V V BAT =1.8V V BAT =2.5V 50 40 30 20 solid line : XC9141 dotted line : XC9142 10 0 0.1 1 10 100 Output Current : IOUT [mA] 1000 1/34 XC9141/XC9142 Series ■BLOCK DIAGRAM ●XC9141A/XC9142A type Lx CFB RFB1 Error Amp. Phase Compensation FB Load disconnect Controller VOUT PWM comparator PWM/PFM Controller Logic RFB2 Vref with Soft Start RAMP Wave Generator CL Discharge Buffer Driver GND OSC CE Controller Logic CE VOUT Current sense VOUT VDD BAT VDD MAX * Diodes inside the circuits are ESD protection diodes and parasitic diodes. * XC9141 series chooses only PWM control. ●XC9141B/XC9142B type Lx CFB RFB1 Error Amp. Phase Compensation FB Load disconnect Controller VOUT PWM comparator PWM/PFM Controller Logic RFB2 Vref with Soft Start RAMP Wave Generator Buffer Driver GND OSC CE Controller Logic CE VOUT Current sense VOUT VDD Bypass SW VDD MAX BAT * Diodes inside the circuits are ESD protection diodes and parasitic diodes. * XC9141 series chooses only PWM control. ●XC9142C type CFB Lx RFB1 Error Amp. FB Phase Compensation Load disconnect Controller Current sense PWM/PFM Controller Logic Vref with Soft Start CE VOUT PWM comparator RFB2 RAMP Wave Generator Buffer Driver GND OSC CE Controller Logic VOUT VDD VDD MAX * Diodes inside the circuits are ESD protection diodes and parasitic diodes. 2/34 VOUT BAT XC9141/XC9142 Series ■BLOCK DIAGRAM (Continued) ●XC9141D/XC9142D type Lx CFB RFB1 Error Amp. Phase Compensation FB PWM comparator PWM/PFM Controller Logic RFB2 Vref with Soft Start RAMP Wave Generator Load disconnect Controller Current sense Short-circuit protect ion Latch Timer VOUT CL Discharge Buffer Driver GND OSC CE Controller Logic CE VOUT VOUT VDD BAT VDD MAX * Diodes inside the circuits are ESD protection diodes and parasitic diodes. * XC9141 series chooses only PWM control. ●XC9141E/XC9142E type CFB RFB1 Error Amp. Lx Phase Compensation FB PWM comparator PWM/PFM Controller Logic RFB2 Vref with Soft Start RAMP Wave Generator Load disconnect Controller Current sense Short-circuit protection Latch Timer VOUT Buffer Driver GND OSC CE Controller Logic CE VOUT VOUT VDD Bypass SW VDD MAX BAT * Diodes inside the circuits are ESD protection diodes and parasitic diodes. * XC9141 series chooses only PWM control. ●XC9142F type Lx CFB RFB1 Error Amp. FB Phase Compensation PWM comparator PWM/PFM Controller Logic RFB2 Vref with Soft Start CE RAMP Wave Generator Load disconnect Controller Current sense Short-circuit protection Latch Timer VOUT VOUT Buffer Driver GND OSC CE Controller Logic VOUT VDD VDD MAX BAT * Diodes inside the circuits are ESD protection diodes and parasitic diodes 3/34 XC9141/XC9142 Series ■PRODUCT CLASSIFICATION ●Ordering Information XC9141①②③④⑤⑥-⑦ PWM control DESIGNATOR ITEM SYMBOL DESCRIPTION A ① Type B D Refer to Selection Guide E ②③ ④ ⑤⑥-⑦(*1) (*1) Output Voltage (XC9141A,B Type) Output Voltage (XC9141D,E Type) Oscillation Frequency Packages (Order Unit) 18～55 Output voltage options e.g. 1.8V → ②=1, ③=8 22～55 Output voltage options e.g. 2.2V → ②=2, ③=2 C D 1.2MHz 3.0MHz MR-G SOT-25 (3,000pcs/Reel) ER-G USP-6C (3,000pcs/Reel) 0R-G WLP-6-01 (5,000pcs/Reel) The ”-G” suffix indicates that the products are Halogen and Antimony free as well as being fully EU RoHS compliant. XC9142①②③④⑤⑥-⑦ PWM/PFM automatic switching control DESIGNATOR ITEM SYMBOL DESCRIPTION A B ① Type C D Refer to Selection Guide E F ②③ ④ ⑤⑥-⑦(*1) (*1) Output Voltage (XC9142A,B,C Type) Output Voltage (XC9142D,E,F Type) Oscillation Frequency Packages (Order Unit) 18～55 Output voltage options e.g. 1.8V → ②=1, ③=8 22～55 Output voltage options e.g. 2.2V → ②=2, ③=2 C 1.2MHz D 3.0MHz MR-G SOT-25 (3,000pcs/Reel) ER-G USP-6C (3,000pcs/Reel) 0R-G WLP-6-01 (5,000pcs/Reel) The ”-G” suffix indicates that the products are Halogen and Antimony free as well as being fully EU RoHS compliant. 4/34 XC9141/XC9142 Series ■PRODUCT CLASSIFICATION (Continued) ●Selection guides TYPE OUTPUT VOLTAGE CHIP ENABLE SOFTSTART A Fixed Yes Fixed B Fixed Yes Fixed C(*1) Fixed Yes Fixed D Fixed Yes Fixed E Fixed Yes Fixed F(*1) Fixed Yes Fixed CURRENT LIMIT Yes (without latch ) Yes (without latch ) Yes (without latch ) Yes (with integral latch) Yes (with integral latch) Yes (with integral latch) SHORT PROTECTION WITH LATCH CL AUTODISCHARGE No Yes No No No No Yes Yes Yes No Yes No SHUTDOWN OPTIONS AT CE=L Complete Output Disconnect(*2) Input-to-Output Bypass(*2) Complete Output Disconnect(*3) Complete Output Disconnect(*2) Input-to-Output Bypass(*2) Complete Output Disconnect(*3) (*1) Type C,F is available for the XC9142 series only. VOUT pin can not be connected to the different output pin such as another supply (AC adaptor). (*3) VOUT pin can be connected to the different output pin such as another supply (AC adaptor). (*2) 5/34 XC9141/XC9142 Series ■PIN CONFIGURATION Lx VOUT 5 4 1 CE 2 3 GND BAT VOUT 6 1 BAT GND 4 Lx 5 2 GND Lx 5 2 GND VOUT 6 1 BAT 3 CE GND 4 WLP-6-01 （BOTTOM VIEW） USP-6C （BOTTOM VIEW） SOT-25 （TOP VIEW） *The dissipation pad for the USP-6C 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 GND (No.2, 4) pin. ■PIN ASSIGNMENT SOT-25 PIN NUMBER USP-6C WLP-6-01 1 2 3 4 5 - 3 2 1 6 5 4 3 2 1 6 5 4 PIN NAME FUNCTIONS CE GND BAT VOUT Lx GND Chip Enable Ground Power Input Output Voltage Switching Ground ■FUNCTION CHART PIN NAME CE SIGNAL STATUS L Stand-by H Active * Do not leave the CE pin open. ■ABSOLUTE MAXIMUM RATINGS Ta=25℃ PARAMETER SYMBOL RATINGS UNITS BAT Pin Voltage VBAT -0.3～+7.0 V Lx Pin Voltage VLx -0.3～+7.0 V VOUT Pin Voltage VOUT -0.3～+7.0 V CE Pin Voltage VCE -0.3～+7.0 V Pd 600 (PCB mounted) 1000 (PCB mounted) mW Power Dissipation SOT-25 USP-6C WLP-6-01 700 (PCB mounted) Operating Ambient Temperature Topr -40～+85 ℃ Storage Temperature Tstg -55～+125 ℃ *GND are standard voltage for all of the voltage. 6/34 3 CE XC9141/XC9142 Series ■ELECTRICAL CHARACTERISTICS ●XC9141/XC9142 Series Ta=25℃ PARAMETER SYMBOL Input Voltage VBAT CONDITIONS Voltage to start oscillation while MIN. TYP. MAX. UNITS CIRCUIT - - 6.0 V ① V ⑤ Output Voltage VOUT Operation Start Voltage VST1 RL=1kΩ - - 0.90 V ① Operation Hold Voltage VHLD RL=1kΩ - 0.65 - V ① fOSC=1.2MHz - 17.0 30.0 μA ③ fOSC=3.0MHz - 26.0 40.0 fOSC=1.2MHz - 1.500 fOSC=3.0MHz - 3.000 mA ③ VBAT= VOUT(T)×0.5 fOSC=1.2MHz 1.02 1.20 1.38 IOUT=100mA fOSC=3.0MHz 2.40 3.00 3.60 MHz ① VBAT=1.2V, fOSC=1.2MHz 85 93 98 VOUT= VOUT(T)-0.2V fOSC=3.0MHz 88 93 98 % ⑤ - - 0 % ⑤ - 165 230 mA ① - 86(*3) - - 90(*3) - - 0.0 1.0 - 1.0 2.4 - 0.3(*2) - Ω ④ - 0.3(*3) - Ω ① - 0.0 1.0 μA Quiescent Current (XC9142) Iq Supply Current IDD Oscillation Frequency fOSC Maximum Duty Cycle DMAX Minimum Duty Cycle DMIN PFM Switching Current Efficiency （XC9142） Efficiency IPFM EFFI EFFI VOUT=VOUT(T) ×1.03→VOUT(T) ×0.97 VOUT=VBAT= VOUT(T)+0.5V VOUT=VBAT= VOUT(T)-0.2V VOUT=VBAT= VOUT(T)+0.5V VBAT=1.5V, RL is selected with VOUT(T), Refer to Table 1. VBAT= VOUT(T)×0.6, RL is selected with VOUT(T), Refer to Table 1. VBAT= VOUT(T)×0.6, IOUT= 100mA A,B,D,E Stand-by Current ISTB VBAT=VLx=6.0V,VCE=0.0V Type (*1) C,F Type Lx SW "Pch" ON Resistance Lx SW "Nch" ON Resistance Lx SW”H” Leakage Current Lx SW”L” Leakage Current （XC9142C/F） Current Limit Integral Latch Time (D,E,F Type) Latch Release Voltage (D,E,F Type) RLXP VBAT=VLx= 6.0V, IOUT=200mA RLXN ILXLH ILXLL ILIM to stop Lx oscillation ⑧ ⑦ ⑧ - 0.0 1.0 μA ② A ⑥ fOSC=1.2MHz 45 300 725 μs ⑥ fOSC=3.0MHz 25 100 365 μs ⑥ 0.9 1.2 1.5 V ① - VBAT(*3) - V ① VBAT= VOUT(T)-0.2V, RLx=1Ω Time from current limit start ⑦ μA C,F Type VBAT=0.0V,VCE=0.0V,VLx=0.0V,VOUT=6.0V VBAT= VOUT(T)-0.2V, RLx=1Ω, tLAT Type ① ① A,B,D,E VBAT=6.0V,VCE=0.0V, VLx=6.0V(*1) % After the integral latch was operated, VLAT_R RL is selected with VOUT(T), Refer to Table 1 VBAT=VOUT(T)-0.2V→0.9V Short-circuit Protection Threshold Voltage VSHORT VBAT=VOUT(T)-0.2V, RL=0Ω (D,E,F Type) 7/34 XC9141/XC9142 Series ■ELECTRICAL CHARACTERISTICS (Continued) PARAMETER SYMBOL CONDITIONS VBAT= VOUT(T)×0.6, VOUT=VOUT(T)× 0.9, Soft-Start Time tSS generated at Lx pin. (A Type) Bypass SW Resistance (B Type) 0.6 1.0 2.5 fOSC=3.0MHz 0.2 0.5 1.0 UNITS CIRCUIT ms ⑤ VBAT= 3.3V,VOUT=3.3V,VCE=0.0V 100 180 400 Ω ② RBSW VBAT= 3.3V,VOUT=0.0V,VCE=0.0V 100 180 400 Ω ② 0.80 - 6.00 V ⑤ GND - 0.20 V ⑤ VOUT= VOUT(T)-0.15V, Applied voltage to VCE, CE ”H” Voltage VCEH CE ”L” Voltage VCEL CE ”H” Current ICEH VBAT=6.0V,VOUT=6.0V, VLx=6.0V, VCE=6.0V -0.1 - 0.1 μA ② CE ”L” Current ICEL VBAT=6.0V,VOUT=6.0V, VLx=6.0V, VCE=0.0V -0.1 - 0.1 μA ② Voltage changes Lx to be generated. VOUT= VOUT(T)-0.15V, Applied voltage to VCE, Voltage changes Lx to“H” level. VOUT(T) = Target voltage XC9141A/D,XC9142A/D,XC9142C/F type: VOUT=0V, XC9141B/E,XC9142B/E type: VOUT=OPEN (*2) Design value for the XC9142C/F type. (*3) Designed value Table 1. External Components RL Table VOUT(T) RL UNITS:V UNITS：Ω 1.8≦VOUT(T) < Circuit No.④ > V VOUT Lx VOUT Lx A A BAT BAT CE GND < Circuit No.⑤ > < Circuit No.⑥ > Wave Form Measure Point Wave Form Measure Point Wave Form Measure Point VOUT Lx VOUT Lx RLx=1Ω RLx=56Ω BAT BAT CE GND < Circuit No.⑧ > VOUT Lx IST B A ILXLH CE GND < Circuit No.⑦ > A BAT CE VOUT Lx IST B A GND 10/34 IOUT CE GND ILXLH A BAT CE GND XC9141/XC9142 Series ■TYPICAL APPLICATION CIRCUIT L VBA T VOUT VOUT Lx BAT CE CE GN D CL CIN 【Typical Examples】fOSC=1.2MHz L CL(*1) MANUFACTURER PRODUCT NUMBER VALUE murata LQH5BPN4R7NT0L 4.7μH TDK LTF5022T-4R7N2R0-LC 4.7μH Coilcraft XFL4020-472MEC 4.7μH murata GRM188R60J106ME84 10μF/6.3V(*2) murata GRM188D71A106MA73 10μF/10V(*2) MANUFACTURER PRODUCT NUMBER VALUE TDK LTF5022T-2R2N3R2-LC 2.2μH Coilcraft XFL4020-222MEC 2.2μH murata GRM188R60J106ME84 10μF/6.3V(*2) murata GRM188D71A106MA73 10μF/10V(*2) 【Typical Examples】fOSC=3.0MHz L CL(*1) 【Typical Examples】fOSC=1.2MHz, fOSC=3.0MHz CIN(*1) (*1) MANUFACTURER PRODUCT NUMBER VALUE murata GRM188R60J106ME84 10μF/6.3V murata GRM188D71A106MA73 10μF/10V Select components appropriate to the usage conditions (ambient temperature, input & output voltage). While selecting a part, please concern about capacitance reduction and voltage durability. (*2) In the case of fosc=1.2MHz: If VOUT(T)≧3.5V and the load current rises above 200mA, use two or more in a parallel connection. In the case of fosc=3.0MHz: If VBAT≧2V, VOUT(T)≧3.5V and the load current rises above 200mA, use two or more in a parallel connection. For the actual load capacitance, use a ceramic capacitor that ensures a capacitance equivalent to or greater than the GRM188R60J106ME84 (Murata). If using tantalum or low ESR electrolytic capacitors please be aware that ripple voltage will be higher due to the larger ESR (Equivalent Series Resistance) values of those types of capacitors. Please also note that the IC’s operation may become unstable with such capacitors so that we recommend to test on the board before usage. If using electrolytic capacitor for the CL, please connect a ceramic capacitor in parallel. 11/34 XC9141/XC9142 Series ■OPERATIONAL EXPLANATION The XC9141/XC9142 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator, phase compensation circuit, N-channel driver transistor, P-channel synchronous rectification switching transistor and current limiter circuit. Lx CFB RFB1 Error Amp. FB Phase Compensation Load disconnect Controller RFB2 CE VOUT PWM comparator PWM/PFM Controller Logic Vref with Soft Start VOUT Current sense RAMP Wave Generator CL Discharge Buffer Driver GND OSC CE Controller Logic VOUT VDD VDD MAX Bypass SW BAT BLOCK DIAGRAM The error amplifier compares the internal reference voltage with the resistors RFB1 and RFB2. Phase compensation is performed on the resulting error amplifier output, to input a signal to the PWM comparator to determine the turn-on time of the N-channel driver transistor during PWM operation. The PWM comparator compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the ramp wave circuit, and delivers the resulting output to the buffer driver circuit to cause the Lx pin to output a switching duty cycle. This process is continuously performed to ensure stable output voltage. The current feedback circuit monitors the N-channel driver transistor’s turn-on current for each switching operation, and modulates the error amplifier output signal to provide multiple feedback signals. This enables a stable feedback loop even when a low ESR capacitor, such as a ceramic capacitor, is used, ensuring stable output voltage. The reference voltage forms a reference that is used to stabilize the output voltage of the IC. After “H” level is fed to CE pin, the reference voltage connected to the error amp increases linearly during the soft start interval. This allows the voltage divided by the internal RFB1 and RFB2 resistors and the reference voltage to be controlled in a balanced manner, and the output voltage rises in proportion to the rise in the reference voltage. This operation prevents rush input current and enables the output voltage to rise smoothly. The ramp wave circuit determines switching frequency. The frequency is fixed internally at 1.2MHz/3.0MHz. The Clock generated is used to produce ramp waveforms needed for PWM operation, and to synchronize all the internal circuits. The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the feedback voltage divided by the internal resistors (RFB1 and RFB2). When the FB is lower than the reference voltage, output voltage of the error amplifier increases. The gain and frequency characteristics of the error amplifier are optimized internally. VDD MAX circuit compares the input voltage and the output voltage then it will select the higher one as the power supply for the IC. The IC enters chip disable state by applying low level voltage to the CE pin. At this time, the N-channel and P-channel synchronous switching transistors are turned OFF. With XC9142C type, the load disconnection function activates even during shutdown, and because the input voltage VBAT and output voltage VOUT are compared to optimally control the orientation of the parasitic diode of the P-channel synchronous switching transistor, a parallel connection with other power supplies is possible. With the XC9141 series and XC9142A/B types, the orientation of the parasitic diode of the P-channel synchronous switching transistor is fixed at anode: VOUT and cathode: Lx during shutdown to break conduction from the input side to the output side by the parasitic diode of the P-channel synchronous switching transistor. When PFM operates, the N-channel driver transistor turns on at the timing of the signal sent from the PWM comparator. The N-channel driver transistor remains on until the current in the coil reaches a constant current (IPFM). The PWM/PFM control circuit compares the signal sent from the PWM comparator to the time it takes the current in the coil to reach a constant current (IPFM), and outputs the pulse that results in a longer ontime of the N-channel driver transistor. This enables smooth switching between PWM and PFM. The XC9141 series directly outputs the signal that is sent from the PWM comparator. 12/34 XC9141/XC9142 Series ■OPERATIONAL EXPLANATION (Continued) The maximum current limit function of XC9141A/B types and XC9142A/B/C types constantly monitors the current flowing in the N-channel driver transistor connected to the Lx pin, and if the current in the N-channel driver transistor exceeds the current limit, the function turns off the N-channel driver transistor. (Please refer to Fig. ILIM①) ① If the current flowing in the N-channel driver transistor exceeds the current limit value (equivalent to the peak coil current), the N-channel driver transistor turns off, and remains off during the clock interval. ② At the next clock, the N-channel driver transistor turns on. If overcurrent continues, ① and ② are repeated. Note that the current in the internal N-channel driver transistor is not the same as the output current IOUT. tSS VOUT(T) VBAT VOUT ILIM ILx RL CE ①② ①② Fig. ILIM The maximum current limit function of XC9141D/E and XC9142D/E/F types monitors the current that flows in the N-channel driver transistor connected to the Lx pin, and consists of both maximum current limiting and a latch function. (Please refer to Fig.ILIM②) Short-circuit protection is a latch-stop function that activates when the output voltage drops below the short-circuit protection threshold voltage in the overcurrent state. (Please refer to Fig.ILIM③) ① If the current flowing in the N-channel driver transistor exceeds the current limit value (equivalent to the peak coil current), the N-channel driver transistor turns off, and remains off during the clock interval. In addition, an integral latch timer starts the count. ② The N-channel driver transistor turns on at the next pulse. If in the overcurrent state at this time, the N-channel driver transistor turns off as in (1). The integral latch timer continues the count. ③ If the count of the integral latch timer continues for 300μs typ.(@fosc=1.2MHz), a function that latches the N-channel driver transistor and Pchannel synchronous switching transistor to the off state activates. ④ If no longer in the overcurrent state at the next pulse, normal operation resumes. The integral latch timer stops the count. ⑤ ⑥ ⑦ If the output voltage VOUT drops below the short-circuit protection threshold voltage VSHORT during the count of the integral latch timer, a function that latches the N-channel driver transistor and P-channel synchronous switching transistor in the off state activates. The shortcircuit protection threshold voltage VSHORT is a threshold voltage that is linked to the input voltage VBAT. In the latched state, either restart by shutting down once with the CE pin, or resume operation by lowering the input voltage VBAT below the latch release voltage VLAT_R(1.2V typ.). The soft start function operates during restart. During the soft-start interval tSS, the integral latch timer and latch function are stopped. When the input voltage VBAT is below the latch release voltage VLAT_R(1.2V typ.), the integral latch timer and latch function stop, but the current limiting function continues operating. * Note that the current in the internal N-channel driver transistor is not the same as the output current IOUT. VOUT VBAT Limit