XCL219/XCL220 Series ETR28010-000a4 1.0A Inductor Built-in Step-Down “micro DC/DC” Converters Preliminary ☆GreenOperationCompatible ■GENERAL DESCRIPTION The XCL219/XCL220 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (2.0mm×2.5mm, h=1.0mm). An internal coil simplifies the circuit and enables minimization of noise and other operational trouble due to the circuit wiring. A wide operating voltage range of 2.5V to 5.5V enables support for applications that require an internally fixed output voltage (0.8V to 3.6V). The XCL219/XCL220 series uses synchronous rectification at an operating frequency of 3.0MHz. The XCL219/XCL220 series uses HiSAT-COT (*) synchronous rectification. HiSAT-COT+PWM control (XCL219) or HiSAT-COT+automatic PWM/PFM switching control (XCL220) can be selected. The series have a high speed soft-start as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.0V or lower. When CE=Low, the integrated CL discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge switch located between the LX and VSS pins. The power consumption will be less than 1.0μA. (*) HiSAT-COT is an original Torex term for High Speed Transient Response. ■FEATURES ■APPLICATIONS Input Voltage Output Voltage Oscillation Frequency Output Current Efficiency Control Methods ●Note Book PC ●Tablet ●SSD ●Mobile phone ●Game ●PND Circuit Protection Functions Output Capacitor : 2.5V～5.5V : 0.8V～3.6V : 3.0MHz : 1.0A : 93% (VIN=5.0V,VOUT=3.3V/300mA) : HiSAT-COT 100% Duty Cycle HiSAT-COT+PWM (XCL219) HiSAT-COT+PWM/PFM (XCL220) : Thermal Shut Down Current Limit Circuit (Drop) Short Circuit Protection (Latch) : Soft-start Circuit Built-in UVLO CL Discharge : Low ESR Ceramic Capacitor Operating Ambient Temperature : -40℃～+105℃ Package : CL-2025-02 Environmental Friendly : EU RoHS Compliant, Pb Free ■TYPICAL APPLICATION CIRCUIT ■ TYPICAL PERFORMANCE CHARACTERISTICS XCL219/XCL220 (VOUT=3.3V) 100 7 VIN 6 2 AGND 1.0A CL 10μF PGND 5 3 VOUT CE 4 8 CIN 4.7μF Efficiency : EFFI (%) 1 Lx XCL220 80 60 40 XCL219 20 V IN=5.0V 0 0.1 1 10 100 Output Current : IOUT (mA) 1000 1/16 XCL219/XCL220 Series Preliminary ■BLOCK DIAGRAM L1 L2 Inductor Short Protection VOUT R1 CFB High Side Current Limit Phase Compensation R2 Error Amp. AGND Comparator S Synch Buffer Drive Logic Q R Vref with Soft Start CE Control Logic, UVLO Thermal Shutdown CE VIN Minimum On Time Generator Lx VIN VOUT PGND PWM/PFM Selector * The XCL219 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally. The XCL220 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at “PWM/PFM automatic switching” internally. Diodes inside the circuit are an ESD protection diode and a parasitic diode. ■PRODUCT CLASSIFICATION ●Ordering Information XCL219①②③④⑤⑥-⑦ XCL220①②③④⑤⑥-⑦ DESIGNATOR PWM PWM/PFM Automatic switching control ITEM SYMBOL Type ① B DESCRIPTION Refer to Selection Guide Output Voltage options e.g.)1.2V → ②=1, ③=2 1.25V → ②=1, ③=C Output Voltage ②③ 08～36 0.05V Increments: 0.05=A,0.15=B,0.25=C,0.35=D,0.45=E,0.55=F,0.65=H, 0.75=K,0.85=L,0.95=M (*1) ④ Oscillation Frequency 3 ⑤⑥-⑦(*1) Package (Order Unit) FR-G 3.0MHz CL-2025-02 (3,000pcs/Reel) The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant. ●Selection Guide TYPE OUTPUT VOLTAGE CL AUTODISCHARGE LATCH or SHORT PROTECTION UVLO CHIP ENABLE CURRENT LIMIT SOFTSTART THERMAL SHUTDOWN B Fixed Yes Yes Yes Yes Yes Fixed Yes 2/16 XCL219/XCL220 Preliminary Series ■PIN CONFIGURATION * It should be connected the pin No.2 and 5 to the GND pin. * If the dissipation pad needs to be connected to other pins, it should be connected to the GND pin. * Please refer to pattern layout page for the connecting to PCB. BOTTOM VIEW ■PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTIONS 1 2 3 4 5 6 7 8 Lx AGND VOUT CE PGND VIN L1 L2 Switching Output Analog Ground Fixed Output Voltage PIN Chip Enable Power Ground Power Input Inductor Electrodes Inductor Electrodes ■FUNCTION TABLE CE PIN Function PIN NAME CE SIGNAL STATUS Low Stand-by High Active * Please do not leave the CE pin open. ■ABSOLUTE MAXIMUM RATINGS Ta=25℃ PARAMETER SYMBOL RATINGS UNITS V VIN Pin Voltage VIN -0.3 ~ + 6.2 LX Pin Voltage VLx - 0.3 ~ VIN + 0.3 or + 6.2 (*1) VOUT Pin Voltage Vout (*2) CE Pin Voltage VCE - 0.3 ~ VIN + 0.3 or + 4.0 V V - 0.3 ~ + 6.2 V Power Dissipation Pd 1000 mW Operating Ambient Temperature Topr - 40 ~ + 105 ℃ Storage Temperature Tstg - 55 ~ + 125 ℃ All voltages are described based on the GND (AGND and PGND) pin. (*1) The maximum value should be either VIN+0.3 or +6.2 in the lowest voltage (*2) The maximum value should be either VIN+0.3 or +4.0 in the lowest voltage 3/16 XCL219/XCL220 Series Preliminary ■ELECTRICAL CHARACTERISTICS Ta=25℃ ●XCL219BxxxFR-G/XCL220BxxxFR-G PARAMETER SYMBOL Output Voltage VOUT Operating Voltage Range VIN Maximum Output Current IOUTMAX UVLO Voltage (*2) VUVLO Quiescent Current (XCL220) Quiescent Current (XCL219) CONDITIONS When connected to external conponets, IOUT =30mA When connected to external components, VIN =<C-1> Vout=0.6V, Voltage which Lx pin holding ”L” level (*6) MIN. TYP. MAX. UNITS CIRCUIT <E-1> <E-2> <E-3> V ① 2.5 - 5.5 V ① 1000 - - mA ① 1.35 2.00 2.48 V ③ Iq VOUT =VOUT(E) ×1.1V - 40 70 μA ② Iq VOUT =VOUT(E) ×1.1V - 400 825 μA ② VCE =0V - 0.0 1.0 μA ② <E-5> <E-6> <E-7> ns ① Stand-by Current ISTB Minimum ON time (*2) tONmin Thermal Shutdown TTSD - 150 - ℃ ① THYS - 30 - ℃ ① Thermal shutdown Hysteresis LxSW ”H” ON Resistance LxSW ”L” ON Resistance (*4) LxSW ”H” Leakage Current LxSW ”L” Leakage Current Current Limit (*5) Output Voltage Temperature Characteristics When connected to external components, VIN =VCE=<C-1>, IOUT=1mA RLXH VOUT=0.6V, ILX=100mA (*3) - 0.24 0.37 Ω ④ RLXL VOUT=VOUT(T) × 1.1V, ILX=100mA (*3) - 0.16 0.30 Ω ④ ILeakH VIN=5.5V, VCE=0V, VOUT=0V, VLX=5.5V - 0.0 30.0 μA ⑤ ILeakL VIN=5.5V, VCE=0V, VOUT=0V, VLX=0V - 0.0 1.0 μA ⑤ ILIMH VOUT=0.6V, ILx until Lx pin oscillates 1.3 1.5 2.5 A ⑥ - ±100 - ppm/℃ ① 1.4 - 5.5 V ③ AGND - 0.3 V ③ VIN=5.5V, VCE=5.5V, VOUT=0V -0.1 - 0.1 μA ⑤ VIN=5.5V, VCE=0V, VOUT=0V -0.1 - 0.1 μA ⑤ 0.10 0.30 0.50 ms ③ 0.17 0.27 0.37 V ③ 50 - 210 1.0 300 - Ω ⑦ μH - - 1.3 - A - ΔVOUT/ (VOUT・Δtopr) CE”H” Voltage VCEH CE”L” Voltage VCEL CE”H” Current ICEH CE”L” Current ICEL IOUT=30mA -40℃≦Topr≦85℃ VOUT=0.6V, Applied voltage to VCE, Voltage changes Lx to “H” level (*6) VFB=0.6V, Applied voltage to VCE, Voltage changes Lx to “L” level (*6) VCE=0V→5.0V, VOUT=VOUT(T)V × 0.9 Soft-start Time Short Protection Threshold Voltage tSS VSHORT CL Discharge Inductance RDCHG L Inductor Rated Current IDC After "H" is fed to CE, the time by when clocks are generated at Lx pin. Sweeping VOUT, VOUT voltage which Lx becomes “L” level (*6) VCE=0V, VOUT=4.0V Test Freq.=1MHz ∆T=+40deg Unless otherwise stated, VIN=5.0V, VCE=5.0V, VOUT(T)=Nominal Voltage NOTE: (*1) When the difference between the input and the output is small, 100% duty might come up and internal control circuits keep P-ch driver turning on even though the output current is not so large. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. (*2) Including UVLO detect voltage, hysteresis operating voltage range for UVLO release voltage. (*3) RLXH=(VIN - Lx pin measurement voltage) / 100mA, RLXL=Lx pin measurement voltage / 100mA (*4) Design value for the XCL220 series (*5) Current limit denotes the level of detection at peak of coil current. (*6) "H"=VIN～VIN - 1.2V, "L"=- 0.1V～+ 0.1V 4/16 XCL219/XCL220 Preliminary Series ■ELECTRICAL CHARACTERISTICS ●SPEC Table (VOUT, tONmin) NOMINAL OUTPUT VOLTAGE VOUT tONmin fOSC=3.0MHz <E-5> <E-6> <E-7> MIN. TYP. MAX. VOUT(T) <E-1> MIN. <E-2> TYP. <E-3> MAX. <C-1> VIN 0.80 0.784 0.800 0.816 2.50 16 53 0.85 0.833 0.850 0.867 2.50 18 57 0.90 0.882 0.900 0.918 2.50 21 0.95 0.931 0.950 0.969 2.50 1.00 0.980 1.000 1.020 2.50 1.05 1.029 1.050 1.071 NOMINAL OUTPUT VOLTAGE VOUT tONmin fOSC=3.0MHz <E-5> <E-6> <E-7> MIN. TYP. MAX. VOUT(T) <E-1> MIN. <E-2> TYP. <E-3> MAX. <C-1> VIN 91 2.25 2.205 2.250 2.295 3.75 60 100 140 95 2.30 2.254 2.300 2.346 3.83 60 100 140 60 99 2.35 2.303 2.350 2.397 3.92 60 100 140 23 63 104 2.40 2.352 2.400 2.448 4.00 60 100 140 26 67 108 2.45 2.401 2.450 2.499 4.08 60 100 140 2.50 29 70 112 2.50 2.450 2.500 2.550 4.17 60 100 140 31 73 115 2.55 2.499 2.550 2.601 4.25 60 100 140 1.10 1.078 1.100 1.122 2.50 1.15 1.127 1.150 1.173 2.50 35 77 119 2.60 2.548 2.600 2.652 4.33 60 100 140 1.20 1.176 1.200 1.224 2.50 38 80 122 2.65 2.597 2.650 2.703 4.42 60 100 140 1.25 1.225 1.250 1.275 2.50 41 83 126 2.70 2.646 2.700 2.754 4.50 60 100 140 1.30 1.274 1.300 1.326 2.50 45 87 129 2.75 2.695 2.750 2.805 4.58 60 100 140 1.35 1.323 1.350 1.377 2.50 48 90 132 2.80 2.744 2.800 2.856 4.67 60 100 140 1.40 1.372 1.400 1.428 2.50 52 93 135 2.85 2.793 2.850 2.907 4.75 60 100 140 1.45 1.421 1.450 1.479 2.50 56 97 137 2.90 2.842 2.900 2.958 4.83 60 100 140 1.50 1.470 1.500 1.530 2.50 60 100 140 2.95 2.891 2.950 3.009 4.92 60 100 140 1.55 1.519 1.550 1.581 2.58 60 100 140 3.00 2.940 3.000 3.060 5.00 60 100 140 1.60 1.568 1.600 1.632 2.67 60 100 140 3.05 2.989 3.050 3.111 5.08 60 100 140 1.65 1.617 1.650 1.683 2.75 60 100 140 3.10 3.038 3.100 3.162 5.17 60 100 140 1.70 1.666 1.700 1.734 2.83 60 100 140 3.15 3.087 3.150 3.213 5.25 60 100 140 1.75 1.715 1.750 1.785 2.92 60 100 140 3.20 3.136 3.200 3.264 5.33 60 100 140 1.80 1.764 1.800 1.836 3.00 60 100 140 3.25 3.185 3.250 3.315 5.42 60 100 140 1.85 1.813 1.850 1.887 3.08 60 100 140 3.30 3.234 3.300 3.366 5.50 60 100 140 1.90 1.862 1.900 1.938 3.17 60 100 140 3.35 3.283 3.350 3.417 5.50 61 102 142 1.95 1.911 1.950 1.989 3.25 60 100 140 3.40 3.332 3.400 3.468 5.50 62 103 144 2.00 1.960 2.000 2.040 3.33 60 100 140 3.45 3.381 3.450 3.519 5.50 63 105 146 2.05 2.009 2.050 2.091 3.42 60 100 140 3.50 3.430 3.500 3.570 5.50 64 106 148 2.10 2.058 2.100 2.142 3.50 60 100 140 3.55 3.479 3.550 3.621 5.50 65 108 151 2.15 2.107 2.150 2.193 3.58 60 100 140 3.60 3.528 3.600 3.672 5.50 65 109 153 2.20 2.156 2.200 2.244 3.67 60 100 140 ■TYPICAL CIRCUIT VALUE 7 1 Lx CL 10μF 1.0A VIN 6 2 AGND PGND 5 3 VOUT PRODUCT NUMBER LMK105BBJ475MVLF(Taiyo Yuden) CIN 10V/4.7μF CL 10V/10μF CIN 4.7μF CE 4 8 LMK107BJ475KA (TaiyoYuden) C1608X5R1A475K (TDK) C2012X7R1A475M(TDK) LMK105CBJ106MVLF(Taiyo Yuden) LMK107BBJ106MALT (TaiyoYuden) C1608X5R1A106K (TDK) C2012X7R1A106M(TDK) NOTE: The integrated Inductor can be used only for this DC/DC converter. Please do not use this inductor for other reasons. 5/16 XCL219/XCL220 Series Preliminary ■TEST CIRCUITS < Circuit No.① > < Circuit No.② > Wave Form Measure Point L RL V CL L2 L1 L2 L1 VOUT Lx VOUT Lx AGND VIN CE A AGND CIN PGND A VIN CE PGND 1μF ※External Components L：1.0μH(Selected goods) CIN：4.7μF(Ceramic) CL:10μF(Ceramic) < Circuit No.③ > < Circuit No.④ > Wave Form Measure Point L2 L1 L2 L1 VOUT Lx VOUT Lx AGND VIN AGND VIN CE PGND 1μF RPulldown 200Ω CE 1μF V ILX PGND RLXH=(VIN-VL)/ILX RLXL=VLX /ILX < Circuit No.⑤ > < Circuit No.⑥ > Wave Form Measure Point L2 L1 L2 L1 VOUT Lx AGND VIN ILeakH VOUT AGND Lx VIN ICEH A CE PGND L2 L1 VOUT Lx AGND VIN A ILeakL 1μF CE ICEL < Circuit No.⑦ > IVOUT A 1μF CE 6/16 PGND PGND 1μF ILIMH V XCL219/XCL220 Preliminary Series ■OPERATIONAL EXPLANATION The XCL219/XCL220 series consists of a reference voltage source, error amplifier, comparator, phase compensation, minimum on time generation circuit, output voltage adjustment resistors, P-channel MOS driver transistor, N-channel MOS switching transistor for the synchronous switch, current limiter circuit, UVLO circuit, thermal shutdown circuit, short protection circuit, PWM/PFM selection circuit and others. (See the BLOCK DIAGRAM below.) L1 L2 Inductor Short Protection VOUT R1 CFB High Side Current Limit Phase Compensation R2 AGND Error Amp. Comparator S Logic Q R Vref with Soft Start CE VIN CE Control Logic, UVLO Thermal Shutdown Minimum On Time Generator Synch Buffer Drive VIN VOUT Lx PGND PWM/PFM Selector <BLOCK DIAGRAM> The method is HiSAT-COT (High Speed circuit Architecture for Transient with Constant On Time) control, which features on time control method and a fast transient response that also achieves low output voltage ripple. The on time (ton) is determined by the input voltage and output voltage, and turns on the Pch MOS driver Tr. for a fixed time. During the off time (toff), the voltage that is fed back through R1 and R2 is compared to the reference voltage by the error amp, and the error amp output is phase compensated and sent to the comparator. The comparator compares this signal to the reference voltage, and if the signal is lower than the reference voltage, sets the SR latch. On time then resumes. By doing this, PWM operation takes place with the off time controlled to the optimum duty ratio and the output voltage is stabilized. The phase compensation circuit optimizes the frequency characteristics of the error amp, and generates a ramp wave similar to the ripple voltage that occurs in the output to modulate the output signal of the error amp. This enables a stable feedback system to be obtained even when a low ESR capacitor such as a ceramic capacitor is used, and a fast transient response and stabilization of the output voltage are achieved. <Minimum on time generation circuit> Generates an on time that depends on the input voltage and output voltage (ton). The on time is set as given by the equations below. ton (ns) = VOUT/VIN×333 <Switching frequency> The switching frequency can be obtained from the on time (ton), which is determined by the input voltage and output voltage, as given by the equation below. fOSC (MHz) = VOUT(V) / (VIN(V)×ton(ns)) <100% duty cycle mode> When the load current is heavy and the voltage difference between input voltage and output voltage is small, 100% duty cycle mode is activated and it keeps the Pch MOS driver Tr. turning on. 100% duty cycle mode attains a high output voltage stability and a high-speed response under all load conditions, from light to heavy, even in conditions where the dropout voltage is low. <Error amp> The error amp monitors the output voltage. The voltage divided by the internal R1 and R2 resistors is a feedback voltage for Error Amp. and compared to the reference voltage. The output voltage of the error amp becomes higher when the feedback voltage is higher than the reference voltage. The frequency characteristics of the error amp are optimized internally. 7/16 XCL219/XCL220 Series Preliminary ■OPERATIONAL EXPLANATION (Continued) <Current Limit> The current limiter circuit of the XCL219/XCL220 series monitors the current flowing through the P-channel MOS driver transistor connected to the Lx pin. When the driver current is greater than a specific level, the current limit function operates to turn off the pulses from the Lx pin at any given timing. When the over current state is eliminated, the IC resumes its normal operation. <Reference voltage source, soft-start function> The reference voltage forms a reference that is used to stabilize the output voltage of the IC. After chip enable of the IC, the reference voltage connected to the error amp increases linearly during the soft-start interval. This allows the voltage divided by the internal R1 and R2 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. If the output voltage does not reach the set output voltage within the soft start time, such as when the load is heavy or a large capacity output capacitor is connected, the balancing of the voltage divided by the internal resistors R1 and R2 and the reference voltage is lost, however, the current restriction function activates to prevent an excessive increase of input current, enabling a smooth rise of the output voltage. <PWM/PFM selection circuit> PWM control is a continuous conduction mode, and operates at a stable switching frequency by means of an on time (ton) that is determined by the input voltage and output voltage regardless of the load. PWM/PFM auto switching control is a discontinuous conduction mode at light loads, and lowers the switching frequency to reduce switching loss and improve efficiency. The XCL219 series is internally fixed to PWM control. The XCL220 series is internally fixed to PWM/PFM auto switching control. <CE function> Operation starts when “H” voltage is input into the CE pin. The IC can be put in the shutdown state by inputting “L” voltage into the CE pin. In the shutdown state, the supply current of the IC is 0μA (TYP.), and the Pch MOS driver Tr. and Nch MOS switch Tr. for synchronous rectification turn off. The CE pin is a CMOS input and the sink current is 0μA. <UVLO> When the VIN voltage becomes 2.00V (TYP.) or lower, the P-ch MOS driver transistor output driver transistor is forced OFF to prevent false pulse output caused by unstable operation of the internal circuitry. When the VIN pin voltage becomes 2.10V (TYP.) or higher, switching operation takes place. By releasing the UVLO function, the IC performs the soft start function to initiate output startup operation. The UVLO circuit does not cause a complete shutdown of the IC, but causes pulse output to be suspended; therefore, the internal circuitry remains in operation. <Thermal Shutdown> For protection against heat damage of the ICs, thermal shutdown function monitors chip temperature. The thermal shutdown circuit starts operating and the P-ch MOS driver and N-ch MOS driver transistor will be turned off when the chip’s temperature reaches 150℃. When the temperature drops to 120℃ (TYP.) or less after shutting of the current flow, the IC performs the soft-start function to initiate output startup operation. <Short-circuit protection function> The short-circuit protection circuit protects the device that is connected to this product and to the input/output in situations such as when the output is accidentally shorted to GND. The short-circuit protection circuit monitors the output voltage, and when the output voltage falls below the short-circuit protection threshold voltage, it turns off the Pch MOS driver Tr and latches it. Once in the latched state, operation is resumed by turning off the IC from the CE pin and then restarting, or by re-input into the VIN pin. 8/16 XCL219/XCL220 Preliminary Series ■OPERATIONAL EXPLANATION (Continued) <CL High Speed Discharge> The product can quickly discharge the electric charge at the output capacitor (CL) when a low signal to the CE pin which enables a whole IC circuit put into OFF state, is inputted via the N-ch MOS switch transistor located between the VOUT pin and the GND pin. When the IC is disabled, electric charge at the output capacitor (CL) is quickly discharged so that it may avoid application malfunction. Output Voltage Dischage characteristics V=VOUT(T) × e - t / τ t =τ Ln (VOUT(T) / V) RDCHG=210Ω (TYP.) CL=10μF 5.0 V : Output voltage after discharge VOUT(T) : Output voltage t : Discharge time τ : CL×RDCHG CL : Capacitance of Output capacitor RDCHG : CL auto-discharge resistance, but it depends on supply voltage. Output Voltage: VOUT(V) 4.5 Vout=1.2V 4.0 Vout=1.8V 3.5 Vout=3.3V 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 2 4 6 8 10 12 14 16 18 20 Discharge Time: t(ms) ■NOTE ON USE 1. For the phenomenon of temporal and transitional voltage decrease or voltage increase, the IC may be damaged or deteriorated if IC is used beyond the absolute MAX. specifications. 2. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly influenced by external component selection, such as the coil inductance, capacitance values, and board layout of external components. Once the design has been completed, verification with actual components should be done. 3. The DC/DC converter characteristics depend greatly on the externally connected components as well as on the characteristics of this IC, so refer to the specifications and standard circuit examples of each component when carefully considering which components to select. Be especially careful of the capacitor characteristics and use B characteristics (JIS standard) or X7R, X5R (EIA standard) ceramic capacitors. 4. Sufficiently reinforce the ground wiring. In particular, reinforce near the PGND and AGND pin as fluctuations of the ground phase due to the ground current during switching may cause the operation of the IC to become unstable. 5. Mount external components as close as possible to the IC. Keep the wiring short and thick to lower the wiring impedance. 6. A feature of HiSAT-COT control is that it controls the off time in order to control the duty, which varies due to the effects of power loss between the input (VIN pin) and output (VOUT pin) due to the load, and thus the switching frequency fluctuates. In addition, changes in the on time due to 100% duty cycle mode are allowed. For this reason, caution must be exercised as the characteristics of the switching frequency will vary depending on the external component characteristics, board layout, input voltage, output voltage, load current and other parameters. 7. Due to propagation delay inside the product, the on time generated by the minimum on time generation circuit may not be the same as the on time that is the ratio of the input voltage to the output voltage. 8. With regard to the current limiting value, the actual coil current may at times exceed the electrical characteristics due to propagation delay inside the product. 9. The CE pin is a CMOS input pin. Do not use with the pin open. If connecting to the input or ground, use a resistor up to 1MΩ. To prevent malfunctioning of the device connected to this product or the input/output due to short circuiting between pins, it is recommended that a resistor be connected. 10. If the output voltage drops below the short circuit protection threshold voltage at the end of the soft start interval, operation will stop. 11. PWM/PFM auto switching control is a discontinuous conduction mode when the load is light, and in cases where the voltage difference between input and output is low or the coil inductance is higher than the value indicated in the standard circuit example, the coil current may reverse when the load is light, and thus pulse skipping will not be possible and light load efficiency will worsen. 9/16 XCL219/XCL220 Series Preliminary ■NOTE ON USE (Continued) 12. When the input voltage is close to the minimum input voltage, the current limit circuit might not be able to work. 13. When the voltage difference between input voltage and output voltage is low, the load stability feature may deteriorate. 14. If the capacitance value is not sufficient by degrading CL due to the low temp. condition and DC bias feature, 100% duty cycle might come up for the load transient condition. Add capacitance value for CL if necessary. 15. If the capacitance value is not sufficient by degrading CL due to the low temp. condition and DC bias feature, the duty cycle might not be stable. Add capacitance value for CL if necessary. 16. Torex places an importance on improving our products and their reliability.We request that users incorporate fail-safe designs and post-aging protection treatment when using Torex products in their systems. 17. Instructions of pattern layouts The operation may become unstable due to noise and/or phase lag from the output current when the wire impedance is high, please place the input capacitor(CIN) and the output capacitor (CL) as close to the IC as possible. (1) In order to stabilize VIN voltage level, we recommend that a by-pass capacitor (CIN) be connected as close as possible to the VIN pin, PGND pin. (2) Please mount each external component as close to the IC as possible. (3) Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit impedance. (4) Make sure that the GND traces are as thick as possible, as variations in ground potential caused by high ground currents at the time of switching may result in instability of the IC. (5) This series’ internal driver transistors bring on heat because of the output current and ON resistance of P-channel and N-channel MOS driver transistors. Please consider the countermeasures against heat if necessary. <Reference pattern layout> <TOP VIEW> 10/16 <BACK SIDE TOP VIEW> XCL219/XCL220 Preliminary Series ■TYPICAL PERFORMANCE CHARACTERISTICS (1) Output Voltage vs. Output Current XCL219B123FR-G, VOUT=1.2V XCL220B123FR-G, VOUT=1.2V XCL219B183FR-G, VOUT=1.8V XCL220B183FR-G, VOUT=1.8V XCL219B333FR-G, VOUT=3.3V XCL220B333FR-G, VOUT=3.3V 11/16 XCL219/XCL220 Series Preliminary ■TYPICAL PERFORMANCE CHARACTERISTICS (2) Efficiency vs. Output Current XCL219B123FR-G, VOUT=1.2V XCL220B123FR-G, VOUT=1.2V XCL219B183FR-G, VOUT=1.8V XCL220B183FR-G, VOUT=1.8V XCL219B333FR-G, VOUT=3.3V 12/16 XCL220B333FR-G, VOUT=3.3V XCL219/XCL220 Preliminary Series ■TYPICAL PERFORMANCE CHARACTERISTICS (3) Ripple Voltage vs. Output Current XCL219B123FR-G, VOUT=1.2V XCL220B123FR-G, VOUT=1.2V XCL219B183FR-G, VOUT=1.8V XCL220B183FR-G, VOUT=1.8V XCL219B183FR-G, VOUT=3.3V XCL220B333FR-G, VOUT=3.3V 13/16 XCL219/XCL220 Series Preliminary ■PACKAGING INFORMATION ●CL-2025-02 (unit: mm) ■External Lead ●Reference Pattern Layout (unit:mm) ※Please have a 0.05mm within the positional Accuracy at the time of mounting. 14/16 ●Reference Metal Mask Design (unit:mm) XCL219/XCL220 Preliminary Series ■MARKING RULE ●CL-2025-02 ① 1 ① ② ③ ⑤ 3 ④ 2 6 represents products series MARK PRODUCT SERIES 2 XCL219B*****-G 3 XCL220B*****-G ② represents integer and oscillation frequency of the output voltage 5 MARK 4 Type Oscillation PRODUCT Frequency(MHz) SERIES N 0.x XCL2**B0*3**-G P 1.x XCL2**B1*3**-G R B 3.0 2.x S ③ OUTPUT VOLTAGE(V) 3.x XCL2**B2*3**-G XCL2**B3*3**-G represents the decimal part of output voltage OUTPUT VOLTAGE(V) MARK PRODUCT SERIES X.0 0 XCL2****0***-G X.05 A XCL2****A***-G X.1 1 XCL2****1***-G X.15 B XCL2****B***-G X.2 2 XCL2****2***-G X.25 C XCL2****C***-G X.3 3 XCL2****3***-G X.35 D XCL2****D***-G X.4 4 XCL2****4***-G X.45 E XCL2****E***-G X.5 5 XCL2****5***-G X.55 F XCL2****F***-G X.6 6 XCL2****6***-G X.65 H XCL2****H***-G X.7 7 XCL2****7***-G X.75 K XCL2****K***-G X.8 8 XCL2****8***-G X.85 L XCL2****L***-G X.9 9 XCL2****9***-G X.95 M XCL2****M***-G ④,⑤ represents production lot number 01～09、0A～0Z、11～9Z、A1～A9、AA～AZ、B1～ZZ in order. (G, I, J, O, Q, W excluded) Note: No character inversion used. 15/16 XCL219/XCL220 Series Preliminary 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. 16/16