XC9235G08C4R-G

XC9235/XC9236/XC9237 Series 600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converters ETR0514-011a The XC9235/XC9236/XC9237 series is a group of synchronous-rectification type DC/DC converters with a built-in 0.42Ω P-channel MOS driver transistor and 0.52 Ω N-channel MOS switching transistor, designed to allow the use of ceramic capacitors. Operating voltage range is from 2.0V to 6.0V (A∼C types), 1.8V to 6.0V (D∼G types). For the D/F types which have a reference voltage of 0.8V (accuracy: ±2.0%), the output voltage can be set from 0.9V by using two external resistors. The A/B/C/E/G types have a fixed output voltage from 0.8V to 4.0V in increments of 0.05V (accuracy: ±2.0%). The device provides a high efficiency, stable power supply with an output current of 600mA to be configured using only a coil and two capacitors connected externally. With the built-in oscillator, either 1.2MHz or 3.0MHz can be selected for suiting to your particular application. As for operation mode, the XC9235 series is PWM control, the XC9236 series is automatic PWM/PFM switching control and the XC9237 series can be manually switched between the PWM control mode and the automatic PWM/PFM switching control mode, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load). The soft start and current control functions are internally optimized. During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0μA or less. The B/F/G types have a high speed soft-start as fast as 0.25ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF when input voltage becomes 1.4V or lower. The B to G types integrate 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. When the devices enter stand-by mode, output voltage quickly returns to the VSS level as a result of this function. Three types of package SOT-25 (A/B/C types only), USP-6C, and 0.4mm low height USP-6EL (A/B/C types only) are available. ■GENERAL DESCRIPTION ☆GreenOperation Compatible ■APPLICATIONS ●Mobile phones, Smart phones ●Bluetooth headsets ●Mobile WiMAX PDAs, MIDs, UMPCs ●Portable game consoles ●Digital cameras, Camcorders ●MP3 Players, Portable Media Players ●Notebook computers ■FEATURES Driver Transistor Built-In Input Voltage Output Voltage High Efficiency Output Current Oscillation Frequency Maximum Duty Cycle Control Methods : 0.42Ω P-ch driver transistor 0.52Ω N-ch switch transistor : 2.0V ~ 6.0V (A/B/C types) 1.8V ~ 6.0V (D/E/F/G types) : 0.8V ~ 4.0V : 92% (TYP.) : 600mA : 1.2MHz, 3.0MHz (+15%) : 100% : PWM (XC9235) PWM/PFM Auto (XC9236) PWM/PFM Manual (XC9237) : Current Limiter Circuit Built-In (Constant Current & Latching) CL Discharge (B/C/D/E/F/G types) High Speed Soft Start (B/F/G type) : Low ESR Ceramic Capacitor : SOT-25 (A/B/C types only), USP-6C USP-6EL(A/B/C types only) : EU RoHS Compliant, Pb Free ■TYPICAL APPLICATION CIRCUIT ●XC9235/XC9236/XC9237 A/B/C/E/G types (Output Voltage Fixed) Function Capacitor Packages Environmentally Friendly ■TYPICAL PERFORMANCE CHARACTERISTICS ●Efficiency vs. Output Current（fOSC=1.2MHz, VOUT=1.8V） ●XC9235/XC9236/XC9237 D/F types (Output Voltage Externally Set) Efficiency: EFFI ) Efficency:EFFI(%(%) 100 90 80 70 60 50 40 30 20 10 0 0.1 1 10 100 1000 Output Current:IOUT(mA) 2.4V VIN= 4.2V 3.6V PWM Control VIN= 4.2V 3.6V 2.4V PWM/PFM Automatic Sw itching Control 1/33 XC9235/XC9236/XC9237 Series ■PIN CONFIGURATION Lx VOUT 5 4 VIN VSS 6 5 1 2 3 Lx VSS VOUT (FB) VIN VSS 6 5 1 2 3 Lx VSS VOUT CE/MODE 4 CE/MODE 4 1 VIN 2 VSS 3 CE/MODE SOT-25 (Top View) USP-6C (BOTTOM VIEW) USP-6EL (BOTTOM VIEW) * Please short the VSS pin (No. 2 and 5). * 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 VSS (No. 5) pin. ■PIN ASSIGNMENT PIN NUMBER SOT-25 USP-6C/USP-6EL 1 6 2 2, 5 3 4 4 5 3 1 PIN NAME VIN VSS CE / MODE VOUT FB FUNCTION Power Input Ground High Active Enable / Mode Selection Pin Fixed Output Voltage Pin (A/B/C/E/G types) Output Voltage Sense Pin (D/F types) Switching Output Lx 2/33 XC9235/XC9236/XC9237 Series ■PRODUCT CLASSIFICATION ●Ordering Information XC9235①②③④⑤⑥-⑦(*1) XC9236①②③④⑤⑥-⑦(*1) *1 XC9237①②③④⑤⑥-⑦( ) DESIGNATOR DESCRIPTION Fixed PWM control PWM / PFM automatic switching control Fixed PWM control PWM / PFM automatic switching manual selection SYMBOL A B C E G Adjustable Output voltage (FB) Functional selection D F DESCRIPTION VIN≧2.0V, No CL discharge, Low speed soft-start VIN≧2.0V, CL discharge, High speed soft-start VIN≧2.0V, CL discharge, Low speed soft-start VIN≧1.8V, CL discharge, Low speed soft-start VIN≧1.8V, CL discharge, High speed soft-start VIN≧1.8V, CL discharge, Low speed soft-start VIN≧1.8V, CL discharge, High speed soft-start Output voltage options e.g. VOUT=2.8V→②=2, ③=8 VOUT=2.85V→②=2, ③=L 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 Reference voltage is fixed in 0.8V ②=0, ③=8 1.2MHz 3.0MHz SOT-25 (*3) SOT-25 (Halogen & Antimony free) (*3) USP-6C USP-6C (Halogen & Antimony free) (*4) USP-6EL (Halogen & Antimony free) (*5) ① Fixed Output voltage (VOUT) Functional selection ②③ Fixed Output Voltage (VOUT) Adjustable Output Voltage (FB) 08 ~ 40 08 C D MR ④ Oscillation Frequency ⑤⑥-⑦ Packages (*2) Taping Type MR-G ER ER-G 4R-G (*1) (*2) (*3) (*4) (*5) 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: ⑤R-⑦, Reverse orientation: ⑤L-⑦) SOT-25 package is available for the A/B/C series only. For Halogen & Antimony Free, the D/E/F/G series is under development. For the USP-6EL package, the D/E/F/G series is under development. 3/33 XC9235/XC9236/XC9237 Series ■BLOCK DIAGRAM ●XC9235 / XC9236 / XC9237 ・XC9235/XC9236/XC9237 AAシリーズ Series Phase Compensation ●XC9235 / XC9236 ・XC9235/XC9236/XC9237/ XC9237 B,C,E,Gシリーズ B/C/E/G Series Phase Compensation VOUT R2 Current Feedback Current Limit CFB Error Amp. FB Logic VOUT R2 Synch Buffer Drive Current Feedback Current Limit CFB Error Amp. FB Logic PWM Comparator PWM Comparator Synch Buffer Drive R1 Lx VIN R1 VSHORT Lx VIN Vref with Soft Start, CE VSHORT PWM/PFM Selector Vref with Soft Start, CE PWM/PFM Selector CE/ Ramp Wave Generator OSC Ramp Wave Generator OSC UVLO Cmp UVLO UVLO Cmp UVLO VSS R3 VSS CE/MODE Control Logic R3 R4 CE/MODE R4 CE/MODE Control Logic CE/MODE ・XC9235/XC9236/XC9237 ●XC9235 / XC9236 / XC9237 D,Fシリーズ D/F Series Phase Compensation FB Error Amp. PWM Comparator Current Feedback Current Limit Logic Synch Buffer Drive Lx VIN Vref with Soft Start, CE VSHORT PWM/PFM Selector CE/ Ramp Wave Generator OSC UVLO Cmp UVLO VSS R3 R4 CE/MODE Control Logic CE/MODE NOTE: The signal from CE/MODE Control Logic to PWM/PFM Selector is being fixed to "L" level inside, and XC9235 series chooses only PWM control. The signal from CE/MODE Control Logic to PWM/PFM Selector is being fixed to "H" level inside, and XC9236 series chooses only PWM/PFM automatic switching control. Diodes inside the circuit are ESD protection diodes and parasitic diodes. ■ABSOLUTE MAXIMUM RATINGS PARAMETER VIN Pin Voltage Lx Pin Voltage VOUT Pin Voltage FB Pin Voltage CE / MODE Pin Voltage Lx Pin Current SOT-25 Power Dissipation USP-6C (*Ta=25℃) USP-6EL Operating Temperature Range Storage Temperature Range SYMBOL VIN VLx VOUT VFB VCE ILx Pd Topr Tstg RATINGS - 0.3 ~ 6.5 - 0.3 ~ VIN + 0.3 ≦ 6.5V - 0.3 ~ 6.5 - 0.3 ~ 6.5 - 0.3 ~ 6.5 ±1500 250 100 100 - 40 ~ + 85 - 55 ~ + 125 UTa=25℃ NIT V V V V V mA mW O O C C 4/33 XC9235/XC9236/XC9237 Series ■ELECTRICAL CHARACTERISTICS XC9237A18Cxx, VOUT=1.8V, fOSC=1.2MHz, Ta=25℃ PARAMETER Output Voltage Operating Voltage Range Maximum Output Current UVLO Voltage Supply Current Stand-by Current Oscillation Frequency PFM Switching Current PFM Duty Limit Maximum Duty Cycle Minimum Duty Cycle Efficiency (*2) SYMBOL VOUT VIN IOUTMAX VUVLO IDD ISTB fOSC IPFM DTYLIMIT_PFM DTYMAX DTYMIN EFFI RLxH RLxH RLxL RLxL ILeakH ILeakL CONDITIONS When connected to external components, VIN=VCE=5.0V, IOUT=30mA VIN=VOUT(E)+2.0V, VCE=1.0V, (*9) When connected to external components VCE =VIN, VOUT=0V, (*1, *11) Voltage which Lx pin holding “L” level VIN=VCE=5.0V, VOUT=VOUT(E)×1.1V VIN=5.0V, VCE=0V, VOUT=VOUT(E)×1.1V When connected to external components, VIN=VOUT(E)+2.0V, VCE =1.0V, IOUT=100mA When connected to external components, (*12) VIN=VOUT(E)+2.0V, VCE =VIN, IOUT=1mA VCE=VIN=(C-1), IOUT=1mA (*12) MIN. 1.764 2.0 600 1.00 1020 120 TYP. 1.800 1.40 15 0 1200 160 200 MAX. 1.836 6.0 1.78 33 1.0 1380 200 UNIT V V mA V μA μA kHz mA % CIRCUIT ① ① ① ② ③ ③ ① ① ① ② ② ① ④ ④ ④ ⑤ ⑤ ⑥ ① ③ ③ VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V VIN=VCE=5.0V, VOUT=VOUT(E)×1.1V When connected to external components, VCE=VIN=VOUT(E)+1.2V, IOUT=100mA (*3) VIN=VCE=5.0V, VOUT=0V, ILx=100mA VIN=VCE=3.6V, VOUT=0V, ILx=100mA VIN=VCE=5.0V VIN=VCE=3.6V (*4) (*4) (*3) 100 (*8) 92 0.35 0.42 0.45 0.52 0.01 0.01 1050 ±100 - 0 0.55 0.67 0.66 0.77 1.0 1.0 1350 6.0 0.25 % % % Ω Ω Ω Ω μA μA mA ppm/℃ V V Lx SW "H" ON Resistance 1 Lx SW "H" ON Resistance 2 Lx SW "L" ON Resistance 1 Lx SW "L" ON Resistance 2 Lx SW "H" Leak Current Lx SW "L" Leak Current (*10) (*5) (*5) VIN=VOUT=5.0V, VCE=0V, Lx=0V VIN=VOUT=5.0V, VCE=0V, Lx=5.0V Current Limit Output Voltage Temperature Characteristics CE "H" Voltage CE "L" Voltage ILIM VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V △VOUT/ IOUT=30mA, -40℃≦Topr≦85℃ (VOUT・△Topr) VOUT=0V, Applied voltage to VCE, VCEH (*11) Voltage changes Lx to “H” level VOUT=0V, Applied voltage to VCE , VCEL (*11) Voltage changes Lx to “L” level VPWMH 900 0.65 VSS PWM "H" Level Voltage When connected to external components, (*6) IOUT=1mA , Voltage which oscillation frequency (*13) becomes 1020 kHz≦fOSC≦1380kHz When connected to external components, (*6) IOUT=1mA , Voltage which oscillation frequency (*13) becomes fOSC＜1020kHz VIN=VCE=5.0V, VOUT=0V VIN=5.0V, VCE=0V, VOUT=0V When connected to external components, VCE=0V → VIN, IOUT=1mA VIN=VCE=5.0V, VOUT=0.8×VOUT(E), (*7) Short Lx at 1Ω resistance Sweeping VOUT, VIN=VCE=5.0V, Short Lx at 1Ω resistance, VOUT voltage which Lx becomes “L” level within 1ms - - VIN - 1.0 V ① PWM "L" Level Voltage CE "H" Current CE "L" Current Soft Start Time Latch Time Short Protection Threshold Voltage VPWML ICEH ICEL tSS tLAT VSHORT VIN – 0.25 - 0.1 - 0.1 0.5 1.0 0.675 1.0 0.900 0.1 0.1 2.5 20.0 1.150 V μA μA ms ms V ① ⑤ ⑤ ① ⑦ ⑦ Test conditions: Unless otherwise stated, VIN=5.0V, VOUT(E)=Nominal Voltage NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100 *3: ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA *4: R&D value *5: When temperature is high, a current of approximately 10μA (maximum) may leak. *6: The CE/MODE pin of the XC9237A series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V *12: XC9235 series exclude IPFM and DTYLIMIT_PFM because those are only for the PFM control’s functions. *13: XC9235/9236 series exclude VPWMH and VPWML because those are only for the XC9237 series’ functions. 5/33 XC9235/XC9236/XC9237 Series ■ELECTRICAL CHARACTERISTICS (Continued) XC9237A18Dxx, VOUT=1.8V, fOSC=3.0MHz, Ta=25℃ PARAMETER Output Voltage Operating Voltage Range Maximum Output Current UVLO Voltage Supply Current Stand-by Current Oscillation Frequency PFM Switching Current PFM Duty Limit Maximum Duty Cycle Minimum Duty Cycle Efficiency SYMBOL VOUT VIN IOUTMAX VUVLO IDD ISTB fOSC IPFM DTYLIMIT_PFM DTYMAX DTYMIN EFFI VIN=VOUT(E)+2.0V, VCE=1.0V, (*9) When connected to external components VCE=VIN, VOUT=0V, (*1,*11) Voltage which Lx pin holding “L” level VIN=VCE=5.0V, VOUT=VOUT(E)×1.1V VIN=5.0V, VCE=0V, VOUT=VOUT(E)×1.1V When connected to external components, VIN=VOUT(E)+2.0V, VCE=1.0V, IOUT=100mA When connected to external components, (*12) VIN=VOUT(E)+2.0V, VCE=VIN, IOUT=1mA VCE=VIN=(C-1), IOUT=1mA (*12) CONDITIONS When connected to external components, VIN=VCE=5.0V, IOUT=30mA MIN. 1.764 2.0 600 1.00 2550 170 100 900 0.65 VSS - TYP. 1.800 1.40 21 0 3000 220 200 86 0.35 0.42 0.45 0.52 0.01 0.01 1050 ±100 - MAX. 1.836 6.0 1.78 35 1.0 3450 270 300 0 0.55 0.67 0.66 0.77 1.0 1.0 1350 6.0 0.25 VIN - 1.0 UNIT V V mA V μA μA kHz mA % % % % Ω Ω Ω Ω μA μA mA ppm/℃ V V V CIRCUIT ① ① ① ③ ② ② ① ① ① ③ ③ ① ④ ④ ⑤ ⑤ ⑥ ① ③ ③ VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V VIN=VCE=5.0V, VOUT=VOUT(E)×0.1V When connected to external components, VCE=VIN＝VOUT(E)+1.2V, IOUT=100mA (*3) VIN=VCE=5.0V, VOUT =0V, ILx=100mA (*3) VIN=VCE=3.6V, VOUT =0V, ILx=100mA (*4) VIN=VCE=5.0V (*4) VIN=VCE=3.6V VIN=VOUT=5.0V, VCE=0V, Lx=0V VIN=VOUT=5.0V, VCE=0V, Lx=5.0V (*8) VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V Lx SW "H" ON Resistance 1 RLxH Lx SW "H" ON Resistance 2 RLxH Lx SW "L" ON Resistance 1 RLxL Lx SW "L" ON Resistance 2 RLxL (*5) Lx SW "H" Leak Current ILeakH (*5) Lx SW "L" Leak Current ILeakL (*10) Current Limit ILIM Output Voltage △VOUT/ IOUT=30mA, -40℃≦Topr≦85℃ Temperature Characteristics (VOUT・△Topr) VOUT=0V, Applied voltage to VCE, CE "H" Voltage VCEH (*11) Voltage changes Lx to “H” level VOUT=0V, Applied voltage to VCE, CE "L" Voltage VCEL (*11) Voltage changes Lx to “L” level PWM "H" Level Voltage VPWMH When connected to external components, (*6) IOUT=1mA , Voltage which oscillation frequency (*13) becomes 2550kHz≦fOSC≦3450kHz When connected to external components, (*6) IOUT=1mA , Voltage which oscillation frequency (*13) becomes fOSC＜2550kHz VIN=VCE=5.0V, VOUT=0V VIN=5.0V, VCE=0V, VOUT=0V When connected to external components, VCE=0V → VIN, IOUT=1mA VIN=VCE=5.0V, VOUT=0.8×VOUT(E), (*7) Short Lx at 1Ω resistance Sweeping VOUT, VIN=VCE=5.0V, Short Lx at 1Ω resistance, VOUT voltage which Lx becomes “L” level within 1ms ① PWM "L" Level Voltage CE "H" Current CE "L" Current Soft Start Time Latch Time Short Protection Threshold Voltage VPWML ICEH ICEL tSS tLAT VSHORT VIN – 0.25 - 0.1 - 0.1 0.5 1.0 0.675 0.9 0.900 0.1 0.1 2.5 20 1.150 V μA μA ms ms V ① ⑤ ⑤ ① ⑦ ⑦ Test conditions: Unless otherwise stated, VIN=5.0V, VOUT(E)=Nominal Voltage NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100 *3: ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA *4: R&D value *5: When temperature is high, a current of approximately 10μA (maximum) may leak. *6: The CE/MODE pin of the XC9237A series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V *12: XC9235 series exclude IPFM and DTYLIMIT_PFM because those are only for the PFM control’s functions. *13: XC9235/9236 series exclude VPWMH and VPWML because those are only for the XC9237 series’ functions. 6/33 XC9235/XC9236/XC9237 Series ■ELECTRICAL CHARACTERISTICS (Continued) XC9237B(C)(E)(G)18Cxx, VOUT=1.8V, fOSC=1.2MHz, Ta=25℃ PARAMETER Output Voltage Operating Voltage Range (B/C series) Operating Voltage Range (E/G series) Maximum Output Current UVLO Voltage Supply Current Stand-by Current Oscillation Frequency PFM Switching Current PFM Duty Limit Maximum Duty Cycle Minimum Duty Cycle Efficiency (*2) SYMBOL VOUT VIN IOUTMAX VUVLO IDD ISTB fOSC IPFM DTYLIMIT_PFM DTYMAX DTYMIN EFFI RLxH RLxH RLxL RLxL ILeakH CONDITIONS When connected to external components, VIN=VCE=5.0V, IOUT=30mA MIN. 1.764 2.0 1.8 TYP. 1.800 1.40 15 0 1200 160 200 92 0.35 0.42 0.45 0.52 0.01 1050 ±100 - MAX. 1.836 6.0 6.0 1.78 33 1.0 1380 200 0 0.55 0.67 0.66 0.77 1.0 1350 6.0 0.25 VIN - 1.0 UNIT V V mA V μA μA kHz mA % % % % Ω Ω Ω Ω μA mA ppm/℃ V V V CIRCUIT ① ① ① ② ③ ③ ① ① ① ② ② ① ④ ④ ④ ⑤ ⑥ ① ③ ③ ① VIN=VOUT(E)+2.0V, VCE=1.0V, (*9) When connected to external components (*14) VCE =VIN, VOUT=VOUT(E)×0.5V (*1, *11) Voltage which Lx pin holding “L” level VIN=VCE=5.0V, VOUT=VOUT(E)×1.1V VIN=5.0V, VCE=0V, VOUT=VOUT(E)×1.1V When connected to external components, VIN=VOUT(E)+2.0V, VCE =1.0V, IOUT=100mA When connected to external components, (*12) VIN=VOUT(E)+2.0V, VCE =VIN, IOUT=1mA (*12) VCE=VIN=(C-1), IOUT=1mA VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V VIN=VCE=5.0V, VOUT=VOUT(E)×1.1V When connected to external components, VCE=VIN=VOUT(E)+1.2V, IOUT=100mA (*3) VIN=VCE=5.0V, VOUT (E)×0.9V , ILx=100mA VIN=VCE=3.6V, VOUT (E)×0.9V , ILx=100mA VIN=VCE=5.0V VIN=VCE=3.6V (*4) (*4) (*3) 600 1.00 1020 120 100 - Lx SW "H" ON Resistance 1 Lx SW "H" ON Resistance 2 Lx SW "L" ON Resistance 1 Lx SW "L" ON Resistance 2 Lx SW "H" Leak Current (*10) (*5) VIN=VOUT=5.0V, VCE=0V, Lx=0V (*8) Current Limit Output Voltage Temperature Characteristics CE "H" Voltage CE "L" Voltage PWM "H" Level Voltage ILIM VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V △VOUT/ I =30mA, -40℃≦Topr≦85℃ (VOUT・△Topr) OUT VOUT= VOUT(E)×0.9V, Applied voltage to VCE, VCEH (*11) Voltage changes Lx to “H” level VOUT= VOUT(E)×0.9V, Applied voltage to VCE , VCEL (*11) Voltage changes Lx to “L” level VPWMH (*6) 900 0.65 VSS - When connected to external components, IOUT=1mA , Voltage which oscillation frequency becomes 1020 (*13) kHz≦fOSC≦1380kHz PWM "L" Level Voltage CE "H" Current CE "L" Current Soft Start Time (B/G Series) Soft Start Time (C/E Series) Latch Time Short Protection Threshold Voltage (B/C Series) Short Protection Threshold Voltage (E/G Series) CL Discharge VPWML ICEH ICEL tSS tSS tLAT VSHORT VSHORT RDCHG When connected to external components, IOUT=1mA , Voltage which oscillation frequency becomes fOSC＜ (*13) 1020kHz VIN=VCE=5.0V, VOUT= VOUT(E)×0.9V VIN=5.0V, VCE=0V, VOUT= VOUT(E)×0.9V When connected to external components, VCE=0V → VIN, IOUT=1mA When connected to external components, VCE=0V → VIN, IOUT=1mA VIN=VCE=5.0V, VOUT=0.8×VOUT(E), (*7) Short Lx at 1Ω resistance Sweeping VOUT, VIN=VCE=5.0V, Short Lx at 1Ω resistance, VOUT voltage which Lx becomes “L” level within 1ms (*11) VIN=VCE=5.0V, The VOUT at Lx=”Low" while decreasing VOUT from VOUT (E)×0.4V (*6) VIN – 0.25 - 0.1 - 0.1 0.5 1.0 0.675 0.338 200 0.25 1.0 0.900 0.450 300 0.1 0.1 0.40 2.5 20.0 1.150 0.563 450 V μA μA ms ms ms V V Ω ① ⑤ ⑤ ① ① ⑦ ⑦ ⑦ ⑧ VIN=5.0V, LX=5.0V, VCE=0V, VOUT=open Test conditions: Unless otherwise stated, VIN=5.0V, VOUT(E)=Nominal Voltage, applied voltage sequence is VOUT→VIN→VCE NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100 *3: ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA *4: R&D value *5: When temperature is high, a current of approximately 10μA (maximum) may leak. *6: The CE/MODE pin of the XC9237A series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V *12: XC9235 series exclude IPFM and DTYLIMIT_PFM because those are only for the PFM control’s functions. *13: XC9235/9236 series exclude VPWMH and VPWML because those are only for the XC9237 series’ functions. *14: VIN is applied when VOUT (E) x 0.5V becomes more than VIN. 7/33 XC9235/XC9236/XC9237 Series ■ELECTRICAL CHARACTERISTICS (Continued) XC9237B(C)(E)(G)18Dxx, VOUT=1.8V, fOSC=3.0MHz, Ta=25℃ PARAMETER Output Voltage Operating Voltage Range (B/C series) Operating Voltage Range (E/G series) Maximum Output Current UVLO Voltage Supply Current Stand-by Current Oscillation Frequency PFM Switching Current PFM Duty Limit Maximum Duty Cycle Minimum Duty Cycle Efficiency Lx SW "H" ON Resistance 1 Lx SW "H" ON Resistance 2 Lx SW "L" ON Resistance 1 Lx SW "L" ON Resistance 2 (*5) Lx SW "H" Leak Current (*10) Current Limit Output Voltage Temperature Characteristics CE "H" Voltage CE "L" Voltage PWM "H" Level Voltage SYMBOL VOUT VIN IOUTMAX VUVLO IDD ISTB fOSC IPFM DTYLIMIT_PFM DTYMAX DTYMIN EFFI VIN=VOUT(E)+2.0V, VCE=1.0V, (*9) When connected to external components (*14) , VCE=VIN, VOUT=VOUT(E)×0.5V (*1,*11) Voltage which Lx pin holding “L” level VIN=VCE=5.0V, VOUT=VOUT(E)×1.1V VIN=5.0V, VCE=0V, VOUT=VOUT(E)×1.1V When connected to external components, VIN=VOUT(E)+2.0V, VCE=1.0V, IOUT=100mA When connected to external components, (*12) VIN=VOUT(E)+2.0V, VCE=VIN, IOUT=1mA (*12) VCE=VIN=(C-1), IOUT=1mA VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V VIN=VCE=5.0V, VOUT=VOUT(E)×0.1V When connected to external components, VCE=VIN＝VOUT(E)+1.2V, IOUT=100mA (*3) VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V, ILx=100mA (*3) VIN=VCE=3.6V, VOUT=VOUT(E)×0.9V, ILx=100mA (*4) VIN=VCE=5.0V (*4) VIN=VCE=3.6V VIN=VOUT=5.0V, VCE=0V, Lx=0V (*8) VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V CONDITIONS When connected to external components, VIN=VCE=5.0V, IOUT=30mA MIN. 1.764 2.0 1.8 600 1.00 2550 170 100 900 0.65 VSS TYP. 1.800 1.40 21 0 3000 220 200 86 0.35 0.42 0.45 0.52 0.01 1050 ±100 MAX. 1.836 6.0 6.0 1.78 35 1.0 3450 270 300 0 0.55 0.67 0.66 0.77 1.0 1350 6.0 0.25 VIN - 1.0 UNIT V V mA V μA μA kHz mA % % % % Ω Ω Ω Ω μA mA ppm/℃ V V V CIRCUIT ① ① ① ③ ② ② ① ① ① ③ ③ ① ④ ④ ⑤ ⑥ ① ③ ③ ① RLxH RLxH RLxL RLxL ILeakH ILIM △VOUT/ I =30mA, -40℃≦Topr≦85℃ (VOUT・△Topr) OUT VOUT=VOUT(E)×0.9V, Applied voltage to VCE, VCEH (*11) Voltage changes Lx to “H” level VOUT=VOUT(E)×0.9V, Applied voltage to VCE, VCEL (*11) Voltage changes Lx to “L” level VPWMH When connected to external components, (*6) IOUT=1mA , Voltage which oscillation frequency (*13) becomes 2550kHz≦fOSC≦3450kHz When connected to external components, (*6) IOUT=1mA , Voltage which oscillation frequency (*13) becomes fOSC＜2550kHz VIN=VCE=5.0V, VOUT=VOUT(E)×0.9V VIN=5.0V, VCE=0V, VOUT=VOUT(E)×0.9V When connected to external components, VCE=0V → VIN, IOUT=1mA When connected to external components, VCE=0V → VIN, IOUT=1mA VIN=VCE=5.0V, VOUT=0.8×VOUT(E), (*7) Short Lx at 1Ω resistance Sweeping VOUT, VIN=VCE=5.0V, Short Lx at 1Ω resistance, VOUT voltage which Lx becomes “L” level within 1ms VIN=VCE=5.0V, The VOUT at Lx=”Low" decreasing VOUT from VOUT (E)×0.4V (*11) PWM "L" Level Voltage CE "H" Current CE "L" Current Soft Start Time (B/G Series) Soft Start Time (C/E Series) Latch Time Short Protection Threshold Voltage (B/C Series) Short Protection Threshold Voltage (E/G Series) CL Discharge VPWML ICEH ICEL tSS tSS tLAT VSHORT VSHORT RDCHG VIN – 0.25 - 0.1 - 0.1 0.5 1.0 0.675 0.338 200 0.32 0.9 0.900 0.450 300 0.1 0.1 0.50 2.5 20 1.150 0.563 450 V μA μA ms ms ms V V Ω ① ⑤ ⑤ ① ① ⑦ ⑦ ⑦ ⑧ while VIN=5.0V, LX=5.0V, VCE=0V, VOUT=open Test conditions: Unless otherwise stated, VIN=5.0V, VOUT(E)=Nominal Voltage, applied voltage sequence is VOUT→VIN→VCE NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100 *3: ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA *4: R&D value *5: When temperature is high, a current of approximately 10μA (maximum) may leak. *6: The CE/MODE pin of the XC9237A series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V *12: XC9235 series exclude IPFM and DTYLIMIT_PFM because those are only for the PFM control’s functions. *13: XC9235/9236 series exclude VPWMH and VPWML because those are only for the XC9237 series’ functions. *14: VIN is applied when VOUT (E) x 0.5V becomes more than VIN. 8/33 XC9235/XC9236/XC9237 Series ■ELECTRICAL CHARACTERISTICS (Continued) ●XC9237D(F)08Cxx, FB Type, fOSC=1.2MHz, Ta=25℃ PARAMETER FB Voltage Operating Voltage Range Maximum Output Current UVLO Voltage Supply Current Stand-by Current Oscillation Frequency PFM Switching Current PFM Duty Limit Maximum Duty Cycle Minimum Duty Cycle Efficiency (*2) SYMBOL VFB VIN IOUTMAX VUVLO IDD ISTB fOSC IPFM DTYLIMIT_PFM DTYMAX DTYMIN EFFI RLｘH RLｘH RLｘL RLｘL ILeakH ILIM △VOUT/ (VOUT・△Topr) VCEH VCEL VPWMH CONDITIONS VIN = VCE =5.0V, The VFB at Lx=”High" decreasing FB pin voltage from 0.9V. (*11) MIN. while 0.784 1.8 TYP. 0.800 1.40 15 0 1200 160 200 92 0.35 0.42 0.45 0.52 0.01 1050 ±100 - MAX. 0.816 6.0 1.78 1.0 1380 200 0 0.55 0.67 0.66 0.77 1.0 1350 6.0 0.25 VIN - 1.0 UNIT V V mA V μA μA kHz mA % % % % Ω Ω Ω Ω μA mA ppm/ ℃ V V V CIRCUIT ③ ① ① ③ ② ② ① ① ① ③ ③ ① ④ ④ ⑨ ⑥ ① ③ ③ ① VIN=3.2V, VCE=1.0V (*9) When connected to external components VCE = VIN , VFB = 0.4V, (*1,*11) Voltage which Lx pin holding “L” level VIN =VCE=5.0V, VFB= 0.88V VIN =5.0V, VCE=0V, VFB= 0.88V When connected to external components, VIN = 3.2V, VCE=1.0V, IOUT=100mA When connected to external components, (*12) VIN =3.2V, VCE = VIN , IOUT=1mA (*12) VCE= VIN =2.0V IOUT=1mA VIN = VCE =5.0V, VFB = 0.72V VIN = VCE =5.0V, VFB = 0.88V When connected to external components, VCE = VIN ＝ 2.4V, IOUT = 100mA (*3) VIN = VCE = 5.0V, VFB = 0.72V,ILX = 100mA (*3) VIN = VCE = 3.6V, VFB = 0.72V,ILX = 100mA (*4) VIN = VCE = 5.0V (*4) VIN = VCE = 3.6V VIN = VFB = 5.0V, VCE = 0V, LX= 0V (*8) VIN = VCE= 5.0V, VFB = 0.72V IOUT =30mA -40℃≦Topr≦85℃ VFB =0.72V, Applied voltage to VCE, (*11) Voltage changes Lx to “H” level VFB =0.72V, Applied voltage to VCE, (*11) Voltage changes Lx to “L” level When connected to external components, (*6) IOUT=1mA , Voltage which oscillation frequency becomes 1020kHz≦fOSC≦1380kHz (*13) 600 1.00 1020 120 100 900 0.65 VSS VIN 0.25 - 0.1 - 0.1 0.5 1.0 0.15 200 Lx SW "H" ON Resistance 1 Lx SW "H" ON Resistance 2 Lx SW "L" ON Resistance 1 Lx SW "L" ON Resistance 2 (*5) Lx SW "H" Leak Current (*10) Current Limit Output Voltage Temperature Characteristics CE "H" Voltage CE "L" Voltage PWM "H" Level Voltage PWM "L" Level Voltage CE "H" Current CE "L" Current Soft Start Time (D series) Soft Start Time (F series) Latch Time Short Protection Threshold Voltage CL Discharge VPWML ICEH ICEL tSS tLAT VSHORT RDCHG When connected to external components, (*6) IOUT=1mA , Voltage which oscillation (*13) frequency becomes fOSC＜1020kHz VIN = VCE =5.0V, VFB =0.72V VIN =5.0V, VCE = 0V, VFB =0.72V When connected to external components, VCE = 0V → VIN , IOUT=1mA VIN=VCE=5.0V, VFB=0.64, Short Lx at 1Ω (*7) resistance (*11) while VIN = VCE =5.0V, The VFB at Lx=”Low" decreasing FB pin voltage from 0.4V. VIN = 5.0V ,LX = 5.0V, VCE = 0V, VFB= open 1.0 0.25 0.200 300 0.1 0.1 2.5 0.40 20.0 0.25 450 V μA μA ms ms V Ω ① ⑤ ⑤ ① ⑦ ⑦ ⑧ Test conditions: VOUT=1.2V when the external components are connected. Unless otherwise stated, VIN=5.0V, VOUT(E)=Nominal Voltage, applied voltage sequence is VOUT→VIN→VCE NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100 *3: ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA *4: R&D value *5: When temperature is high, a current of approximately 10μA (maximum) may leak. *6: The CE/MODE pin of the XC9237A series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VFB with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V *12: XC9235 series exclude IPFM and DTYLIMIT_PFM because those are only for the PFM control’s functions. *13: XC9235/9236 series exclude VPWMH and VPWML because those are only for the XC9237 series’ functions. 9/33 XC9235/XC9236/XC9237 Series ■ELECTRICAL CHARACTERISTICS (Continued) ●XC9237D(F)08Dxx, FB, fOSC=3.0MHz, Ta=25℃ PARAMETER FB Voltage Operating Voltage Range Maximum Output Current UVLO Voltage Supply Current Stand-by Current Oscillation Frequency PFM Switching Current PFM Duty Limit Maximum Duty Cycle Minimum Duty Cycle Efficiency (*2) SYMBOL VFB VIN IOUTMAX VUVLO IDD ISTB fOSC IPFM DTYLIMIT_PFM DTYMAX DTYMIN EFFI RLｘH RLｘH RLｘL RLｘL ILeakH ILIM △VOUT/ (VOUT・△Topr) VCEH VCEL VPWMH CONDITIONS VIN = VCE =5.0V, The VFB at Lx=”High" decreasing FB pin voltage from 0.9V. (*11) MIN. while 0.784 1.8 TYP. 0.800 1.40 21 0 3000 220 200 MAX. 0.816 6.0 1.78 35 1.0 3450 270 300 0 0.55 0.67 0.66 0.77 1.0 1350 6.0 0.25 VIN - 1.0 UNIT V V mA V μA μA kHz mA % % % % Ω Ω Ω Ω μA mA ppm/ ℃ V V V CIRCUIT ③ ① ① ③ ② ② ① ① ① ③ ③ ① ④ ④ ⑨ ⑥ ① ③ ③ ① VIN=3.2V, VCE=1.0V (*9) When connected to external components VCE = VIN , VFB = 0.4V , (*1, *11) Voltage which Lx pin holding “L” level VIN =VCE=5.0V, VFB= 0.88V VIN =5.0V, VCE=0V, VFB= 0.88V When connected to external components, VIN = 3.2V, VCE=1.0V, IOUT=100mA When connected to external components, (*12) VIN =3.2V, VCE = VIN , IOUT=1mA VCE= VIN =2.2V IOUT=1mA (*12) 600 1.00 2550 170 VIN = VCE =5.0V, VFB = 0.72V VIN = VCE =5.0V, VFB = 0.88V When connected to external components, VCE = VIN ＝ 2.4V, IOUT = 100mA (*3) VIN = VCE = 5.0V, VFB = 0.72V,ILX = 100mA (*3) VIN = VCE = 3.6V, VFB = 0.72V,ILX = 100mA (*4) VIN = VCE = 5.0V (*4) VIN = VCE = 3.6V VIN = VFB = 5.0V, VCE = 0V, LX= 0V (*8) VIN = VCE= 5.0V, VFB = 0.72V IOUT =30mA -40℃≦Topr≦85℃ VFB =0.72V , VCE, (*11) Voltage changes Lx to “H” level VFB =0.72V, VCE, (*11) Voltage changes Lx to “L” level When connected to external components, (*6) IOUT = 1mA , Voltage which oscillation frequency (*13) becomes 2550kHz≦fOSC≦3450kHz When connected to external components, (*6) IOUT = 1mA , Voltage which oscillation frequency (*13) becomes fOSC＜2550kHz VIN = VCE =5.0V, VFB =0.72V VIN =5.0V, VCE = 0V, VFB =0.72V When connected to external components, VCE = 0V → VIN , IOUT=1mA VIN = VCE = 5.0V, VFB = 0.64, (*7) Short Lx at 1Ω resistance (*11) VIN = VCE =5.0V, The VFB at Lx=”Low" while decreasing FB pin voltage from 0.4V. VIN = 5.0V ,LX = 5.0V ,VCE = 0V ,VFB= open 100 900 0.65 VSS VIN 0.25 - 0.1 - 0.1 0.5 1.0 0.15 200 86 0.35 0.42 0.45 0.52 0.01 1050 ±100 - Lx SW "H" ON Resistance 1 Lx SW "H" ON Resistance 2 Lx SW "L" ON Resistance 1 Lx SW "L" ON Resistance 2 (*5) Lx SW "H" Leak Current (*10) Current Limit Output Voltage Temperature Characteristics CE "H" Voltage CE "L" Voltage PWM "H" Level Voltage PWM "L" Level Voltage CE "H" Current CE "L" Current Soft Start Time (D series) Soft Start Time (F series) Latch Time Short Protection Threshold Voltage CL Discharge VPWML ICEH ICEL tSS tLAT VSHORT RDCHG 1.0 0.25 0.200 300 0.1 0.1 2.5 0.40 20.0 0.25 450 V μA μA ms ms V Ω ① ⑤ ⑤ ① ⑦ ⑦ ⑧ Test conditions: VOUT=1.2V when the external components are connected. Unless otherwise stated, VIN=5.0V, VOUT(E)=Nominal Voltage, applied voltage sequence is VOUT→VIN→VCE NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100 *3: ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA *4: R&D value *5: When temperature is high, a current of approximately 10μA (maximum) may leak. *6: The CE/MODE pin of the XC9237A series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VFB with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V *12: XC9235 series exclude IPFM and DTYLIMIT_PFM because those are only for the PFM control’s functions. *13: XC9235/9236 series exclude VPWMH and VPWML because those are only for the XC9237 series’ functions. 10/33 XC9235/XC9236/XC9237 Series ■ELECTRICAL CHARACTERISTICS (Continued) ●PFM Switching Current (IPFM) by Oscillation Frequency and Setting Voltage (mA) SETTING VOLTAGE VOUT(E) ≦1.2V 1.2V＜VOUT(E) ≦1.75V 1.8V≦VOUT(E) MIN. 140 130 120 1.2MHz TYP. 180 170 160 MAX. 240 220 200 MIN. 190 180 170 3.0MHz TYP. 260 240 220 MAX. 350 300 270 ●Input Voltage (VIN) for Measuring PFM Duty Limit (DTYLIMIT_PFM) fOSC C-1 Minimum operating voltage is 2.0V. ex.) Although when VOUT(E) is 1.2V and fOSC is 1.2MHz, (C-1) should be 1.7V, (C-1) becomes 2.0V for the minimum operating voltage 2.0V. 1.2MHz VOUT(E)+0.5V 3.0MHz VOUT(E)+1.0V ●Soft-Start Time, Setting Voltage（XC9235B(G)/9236B(G)/9237B(G) Series only） SERIES fOSC 1.2MHz 1.2MHz 1.2MHz 1.2MHz XC9236B(G) XC9235B(G)/ XC9236B(G)/XC9237B(G) 1.2MHz 1.2MHz 3.0MHz 3.0MHz SETTING VOLTAGE 0.8≦V OUT(E) VIN Lx VOUT (FB) ILx < Circuit No.9 > A A CIN VIN Lx VOUT (FB) 1uF CE/MODE VSS CE/MODE VSS 21/33 XC9235/XC9236/XC9237 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (1) Efficiency vs. Output Current XC9237A18C L=4.7μH (NR4018), CIN=4.7μF, CL=10μF 100 90 80 Efficiency: EFFI (%) ) Efficency:EFFI(% Efficiency: EFFI (%) Efficency:EFFI(%) XC9237A18D L=1.5μH (NR3015), CIN=4.7μF, CL=10μF 100 90 80 PWM/PFM Automatic Sw itching Control PWM/PFM Automatic Sw itching Control 70 60 50 40 30 20 10 0 0.1 VIN= 4.2V 3.6V 2.4V PWM Control VIN= 4.2V 3.6V 2.4V 70 60 50 40 30 20 10 0 2.4V VIN= 4.2V 3.6V PWM Control VIN= 4.2V 3.6V 2.4V 1 Output Current: IOUT (mA) 100 10 Output Current:IOUT(mA) 1000 0.1 1 utput Current: IOUT (mA) 100 10 O Output Current:IOUT(mA) 1000 (2) Output Voltage vs. Output Current XC9237A18C L=4.7μH (NR4018), CIN=4.7μF, CL=10μF 2.1 2.0 OutputVoltage: VOUT (V) Output Voltage:Vout(V) 1.9 1.8 1.7 PWM Control 1.6 1.5 0.1 1 10 Output Current: IOUT (mA) XC9237A18D L=1.5μH (NR3015), CIN=4.7μF, CL=10μF 2.1 2.0 PWM/PFM Automatic Sw itching Control VIN＝4.2V,3.6V,2.4V Output Voltage:Vout(V) 1.9 1.8 1.7 1.6 1.5 PWM/PFM Automatic Sw itching Control VIN＝4.2V,3.6V,2.4V PWM Control 100 1000 0.1 1 10 Output Current: IOUT (mA) 100 1000 Output Current:IOUT(mA) Output Current:IOUT(mA) (3) Ripple Voltage vs. Output Current XC9237A18C L=4.7μH (NR4018), CIN=4.7μF, CL=10μF XC9237A18D L=1.5μH (NR3015), CIN=4.7μF, CL=10μF 100 100 80 Ripple Voltage: Vr (mV) Ripple Voltage:Vr(mV) Ripple Voltage: Vr (mV) Ripple Voltage:Vr(mV) 80 60 PWM Control VIN＝4.2V,3.6V,2.4V 40 PWM/PFM Automatic Sw itching Control VIN＝4.2V 3.6V 　　2.4V 60 40 PWM/PFM Automatic PWM Control VIN＝4.2V,3.6V,2.4V Sw itching Control VIN＝4.2V 3.6V 　　2.4V 20 20 0 0.1 1 10 100 1000 Output Current: IOUT (mA) Output Current:IOUT(mA) 0 0.1 1 10 100 1000 Output Current: IOUT (mA) Output Current:IOUT(mA) 22/33 XC9235/XC9236/XC9237 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (4) Oscillation Frequency vs. Ambient Temperature XC9237A18C L=4.7μH (NR4018), CIN=4.7μF, CL=10μF Oscillation Frequency: : FOSC(MHz) Oscillation Frequency FOSC (MHz) XC9237A18D L=1.5μH (NR3015), CIN=4.7μF, CL=10μF 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 -50 -25 0 25 50 75 100 VIN=3.6V 1.5 Oscillation Frequency : FOSC(MHz) Oscillation Frequency: FOSC (MHz) 1.4 1.3 1.2 1.1 1.0 0.9 0.8 -50 -25 0 25 50 75 100 VIN=3.6V Ambient Temperature:Ta (℃) ) Ambient Temperature: Ta ( ℃ Ambient Temperature: Ta () ) Ambient Temperature: Ta (℃ ℃ (5) Supply Current vs. Ambient Temperature XC9237A18C 40 35 Supply Current : IDD ( μ Supply Current: IDD (μA) A) XC9237A18D 40 35 Supply Current : IDD (μ Supply Current: IDD (μA) A) VIN=6.0V 30 25 20 15 10 5 0 -50 VIN=2.0V VIN=6.0V VIN=4.0V 30 25 20 15 10 5 0 -50 VIN=2.0V VIN=4.0V -25 0 25 50 75 100 -25 0 25 50 75 100 Ambient Temperature: Ta ( ( ) Ambient Temperature: Ta℃℃) Ambient Temperature: Ta (℃℃ Ambient Temperature: Ta () ) (6) Output Voltage vs. Ambient Temperature XC9237A18D 2.1 2.0 Output Voltage :VOUT (V) Output Voltage: VOUT (V) 1.9 1.8 1.7 1.6 1.5 -50 -25 0 25 50 75 100 Ambient Temperature: Ta () ) Ambient Temperature: Ta (℃℃ UVLO Voltage: UVLO (V) UVLO Voltage : UVLO (V) (7) UVLO Voltage vs. Ambient Temperature XC9237A18D 1.8 CE=VIN 1.5 1.2 0.9 0.6 0.3 0.0 -50 -25 0 25 50 75 100 Ambient Temperature: Ta℃℃) Ambient Temperature: Ta ( ( ) VIN=3.6V 23/33 XC9235/XC9236/XC9237 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (8) CE "H" Voltage vs. Ambient Temperature XC9237A18D 1.0 CE "H" Voltage : VCEH (V) 0.9 CE “L” Voltage: : VCEL (V) CE "L" Voltage VCEL (V) (9) CE "L" Voltage vs. Ambient Temperature XC9237A18D 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 VIN=2.4V VIN=3.6V VIN=5.0V 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 -50 -25 0 25 50 75 100 Ambient Temperature:Ta (℃) ) Ambient Temperature: Ta ( ℃ VIN=2.4V VIN=3.6V VIN=5.0V CE “H” Voltage: VCEH (V) -50 -25 0 25 50 75 100 Ambient Temperature: Ta (℃)℃) Ambient Temperature: Ta ( (10) Soft Start Time vs. Ambient Temperature XC9237A18C L=4.7μH (NR4018), CIN=4.7μF, CL=10μF 5 5 XC9237A18D L=1.5μH (NR3015), CIN=4.7μF, CL=10μF Soft Start Time: TSS (ms) ) Soft Start Time : TSS (ms 3 Soft Start Time: : TSS (ms Soft Start Time TSS (ms) ) 4 4 3 2 VIN=3.6V 2 VIN=3.6V 1 1 0 -50 -25 0 25 50 75 100 0 -50 -25 0 25 50 75 100 Ambient Temperature: Ta (℃℃ Ambient Temperature: Ta () ) Ambient Temperature: (℃ Ambient Temperature: TaTa ()℃) (11) "Pch / Nch" Driver on Resistance vs. Input Voltage XC9237A18D LLx SW ON Resistance:RLxH,RLxL ( Ω) x SW ON Resistance: RLxH, RLxL (Ω) 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 1 2 3 4 5 6 Input Voltage :VIN (V) Input Voltage: VIN (V) Pch on Resistance Nch on Resistance 24/33 XC9235/XC9236/XC9237 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (12) XC9235B/36B/37B Rise Wave Form XC9237B12C L=4.7μH (NR4018), CIN=4.7μF, CL=10μF VIN=5.0V IOUT=1.0mA XC9237B33D L=1.5μH (NR3015), CIN=4.7μF, CL=10μF VIN=5.0V IOUT=1.0mA VOUT：0.5V/div VOUT：1.0V/div CE：0.0V⇒1.0V 100μs/div CE：0.0V⇒1.0V 100μs/div (13) XC9235B/36B/37B Soft-Start Time vs. Ambient Temperature XC9237B12C XC9237B33D L=1.5μH(NR3015), CIN=4.7μF, CL=10μF 500 L=4.7μH(NR4018), CIN=4.7μF, CL=10μF 500 Soft Start Time :TSS (μs) Soft Start Time :TSS (μs) 400 400 300 300 200 VIN=5.0V IOUT=1.0mA 200 VIN=5.0V IOUT=1.0mA 100 100 0 -50 -25 0 25 50 75 100 0 -50 -25 0 25 50 75 100 Ambient Temperature: Ta(℃) Ambient Temperature: Ta(℃) (14) XC9235B/36B/37B 600 CL Discharge Resistance vs. Ambient Temperature XC9237B33D VIN=6.0V CL Discharge Resistance: (Ω) 500 VIN=4.0V VIN=2.0V 400 300 200 100 -50 -25 0 25 50 75 100 Ambient Temperature: Ta (℃) 25/33 XC9235/XC9236/XC9237 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (15) Load Transient Response XC9237A18C L=4.7μH (NR4018), CIN=4.7μF (ceramic), CL=10μF (ceramic), Topr=25℃ VIN=3.6V, VCE=VIN (PWM/PFM Automatic Switching Control) IOUT=1mA → 100mA IOUT=1mA → 300mA 1ch: IOUT 1ch: IOUT 2ch VOUT: 50mV/div 2ch VOUT: 50mV/div 50μs/div 50μs/div IOUT=100mA → 1mA IOUT=300mA → 1mA 1ch: IOUT 1ch: IOUT 2ch VOUT: 50mV/div 200μs/div 2ch VOUT: 50mV/div 200μs/div 26/33 XC9235/XC9236/XC9237 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (15) Load Transient Response (Continued) XC9237A18C L=4.7μH (NR4018), CIN=4.7μF (ceramic), CL=10μF (ceramic), Topr=25℃ VIN=3.6V, VCE=1.8V (PWM Control) IOUT=1mA → 100mA IOUT=1mA → 300mA 1ch: IOUT 1ch: IOUT 2ch VOUT: 50mV/div 2ch VOUT: 50mV/div 50μs/div 50μs/div IOUT=100mA → 1mA IOUT=300mA → 1mA 1ch: IOUT 1ch: IOUT 2ch VOUT: 50mV/div 2ch VOUT: 50mV/div 200μs/div 200μs/div 27/33 XC9235/XC9236/XC9237 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (15) Load Transient Response (Continued) XC9237A18D L=1.5μH (NR3015), CIN=4.7μF (ceramic), CL=10μF (ceramic), Topr=25℃ VIN=3.6V, VCE=VIN (PWM/PFM Automatic Switching Control) IOUT=1mA → 100mA IOUT=1mA → 300mA 1ch: IOUT 1ch: IOUT 2ch VOUT: 50mV/div 2ch VOUT: 50mV/div 50μs/div 50μs/div IOUT=100mA → 1mA IOUT=300mA → 1mA 1ch: IOUT 1ch: IOUT 2ch VOUT: 50mV/div 2ch VOUT: 50mV/div 200μs/div 200μs/div 28/33 XC9235/XC9236/XC9237 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (15) Load Transient Response (Continued) XC9237A18D L=1.5μH (NR3015), CIN=4.7μF (ceramic), CL=10μF (ceramic), Topr=25℃ VIN=3.6V, VCE=1.8V (PWM Control) IOUT=1mA → 100mA IOUT=1mA → 300mA 1ch: IOUT 1ch: IOUT 2ch VOUT: 50mV/div 2ch VOUT: 50mV/div 50μs/div 50μs/div IOUT=100mA → 1mA IOUT=300mA → 1mA 1ch: IOUT 1ch: IOUT 2ch VOUT: 50mV/div 2ch VOUT: 50mV/div 200μs/div 200μs/div 29/33 XC9235/XC9236/XC9237 Series ■PACKAGING INFORMATION ●SOT-25 ●USP-6C ●USP-6C Reference Pattern Layout 2.4 0.45 0.45 ●USP-6C Reference Metal Mask Design 1 2 3 0.05 1.0 0.05 6 5 4 30/33 XC9235/XC9236/XC9237 Series ■PACKAGING INFORMATION (Continued) ●USP-6EL * A part of the pin may appear from the side of the package because of it’s structure, but reliability of the package and strength will not be changed below the standard. ●USP-6EL Reference Pattern Layout 1.5 0.35 0.375 ●USP-6EL Reference Metal Mask Design 1.4 0.3 0.5 0.3 2.25 1.1 0.375 0.55 0.55 0.3 0.55 0.55 0.9 2.2 31/33 XC9235/XC9236/XC9237 Series ■MARKING RULE ●SOT-25, USP-6C, USP-6EL ① represent product series PRODUCT XC9235 SERIES A B C D E F G SOT-25 (TOP VIEW) 4 C K K 4 2 C XC9236 5 D L L 5 7 D XC9237 6 E M M 6 B E ② represents integer number of output voltage and oscillation frequency ●A/B/C/F Series OUTPUT MARK VOLTAGE (V) fOSC=1.2MHz fOSC=3.0MHz 0.X 1.X 2.X 3.X 4.X ●E/G/D Series OUTPUT VOLTAGE (V) 0.X 1.X 2.X 3.X 4.X A B C D E F H K L M ①②③ USP-6C/USP-6EL USP-6C/USP-6EL (Top View) (TOP VIEW) ④⑤ MARK fOSC=1.2MlHz N P R S T fOSC=3.0MlHz U V X Y Z ③ represents decimal point of output voltage VOUT (V) MARK VOUT (V) X.00 X.10 X.20 X.30 X.40 X.50 X.60 X.70 X.80 X.90 0 1 2 3 4 5 6 7 8 9 X.05 X.15 X.25 X.35 X.45 X.55 X.65 X.75 X.85 X.95 MARK A B C D E F H K L M ④⑤ represents production lot number Order of 01, …09, 10, 11, …99, 0A, …0Z, 1A, …9Z, A0, …Z9, AA, …ZZ. (G, I, J, O, Q, W excluded) *No character inversion used. 32/33 XC9235/XC9236/XC9237 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. 33/33