XC6365/XC6366 Series ETR0501_002 PWM Controlled, PWM/PFM Switchable Step-Down DC/DC Converters ☆GO-Compatible ■GENERAL DESCRIPTION The XC6365/XC6366 series are multi-functional step-down DC/DC converters with built-in high speed, low ON resistance drivers. An output current of more than 1A is possible using an externally connected transistor, coil, diode and capacitor. Output voltage is programmable in 100mV increments between 1.5V to 6.0V (VOUT) (±2.5% accuracy). Further, with 1.0V of standard voltage supply internal and using externally connected components, output voltage can be set up freely (FB). With a 300kHz switching frequency, the size of the external components can be reduced. Control switches from PWM to PFM during light loads with the XC6366 (PWM/PFM switchable) and the series is highly efficient from light loads to large output currents. In relation to soft-start time, both internally set-up 10msec types (A, B) and external resistor or capacitor regulated types (C, D) are available. During stand-by time (CE pin "Low" ), current consumption is reduced to less than 0.5μA. With U.V.L.O. internal, the external transistor will be forcibly switched off if used below the stipulated voltage. ■APPLICATIONS ■FEATURES ●Electronic information organizers Input Voltage Range : 2.2V ~ 10V (VOUT type) ●Palmtops ●Cellular and portable phones Output Voltage Range : 1.5V ~ 6.0V programmable in 100mV increments (±2.5%) Oscillation Frequency : 300kHz (±15%) ●Portable audio systems ●Various multi-function power supplies : Custom products for 180, 500kHz Output Current : More than 1.0A High Efficiency : 92% (TYP.) (VIN=5.0V, VOUT=3.0V) Stand-by Capability : ISTB=0.5μA (MAX.) Soft-start time set-up externally type possible Internally set-up output voltage type possible (VOUT) Externally set-up output voltage type possible (FB) Maximum Duty Ratio : 100% PWM/PFM Switching Control (XC6366) Package ■TYPICAL APPLICATION CIRCUIT : SOT-25 ■TYPICAL PERFORMANCE CHARACTERISTICS 1/23 XC6365/XC6366 Series ■PIN CONFIGURATION ■PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTION 1 2 3 EXT/ VDD GND 4 CE 5 VOUT (FB) External Transistor Connection Power Supply Ground Chip Enable Soft-Start Capacitor Connection with Soft-Start Externally Set-Up Types (C, D) Output Voltage Monitor FB with Externally Set-Up Types (B, D) ■PRODUCT CLASSIFICATION ●Selection Guide 2/23 XC6365/XC6366 Series ■PRODUCT CLASSIFICATION (Continued) ●Ordering Information XC6365①②③④⑤⑥ XC6366①②③④⑤⑥ DESIGNATOR ① ② ③ ④ PWM control PWM/PFM switching control DESCRIPTION Type of DC/DC Converter Output Voltage Oscillation Frequency ⑤ Package ⑥ Device Orientation SYMBOL DESCRIPTION A : VOUT type: Internally set-up, soft-start internally set-up B : FB type: Externally set-up, soft-start internally set-up C : VOUT type: Internally set-up, soft-start externally set-up D : FB type: Externally set-up, soft-start internally set-up 15∼60 : VOUT type: 3.0V output → ②=3, ③=0 10 : FB type: 10 fixed → ②=1, ③=0 fixed 3 : 300kHz 5 : 500kHz (custom) 2 : 180kHz (custom) M : SOT-25 (SOT-23-5) R : Embossed tape, standard feed L : Embossed tape, reverse feed 3/23 XC6365/XC6366 Series ■BLOCK DIAGRAMS XC6365, XC6366 Series A, C type (VOUT) XC6365, XC6366 Series B, D type (FB) 4/23 XC6365/XC6366 Series ■ABSOLUTE MAXIMUM RATINGS Ta = 25℃ PARAMETER VIN Pin Voltage VOUT Pin Voltage FB Pin Voltage CE Pin Voltage EXT/ Pin Voltage EXT/ Pin Current Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL VDD VOUT VFB VCE VEXT/ RATINGS -0.3 ~ +12 -0.3 ~ VIN +0.3 -0.3 ~ VIN +0.3 -0.3 ~ VIN +0.3 -0.3 ~ VIN +0.3 ±100 150 -30 ~ +80 -40 ~ +125 IEXT/ Pd Topr Tstg UNITS V V V V V mA mW ℃ ℃ Note: Voltage is all ground standardized. ■ELECTRICAL CHARACTERISTICS XC6365A333MR, XC6366A333MR PARAMETER SYMBOL Output Voltage VOUT Maximum Input Voltage VIN U.V.L.O. Voltage VUVLO (Minimum Operating Voltage) Supply Current 1 IDD1 Supply Current 2 IDD2 Stand-by Current ISTB Oscillation Frequency FOSC Maximum Duty Ratio PFM Duty Ratio MAXDTY PFMDTY CE "High" Voltage VCEH CE "Low" Voltage VCEL EXT "High" ON Resistance EXT "Low" ON Resistance REXTBH REXTBL Efficiency EFFI Soft-Start Time TSS (VOUT=3.3V, Ta=25℃ FOSC=300kHz) CONDITIONS Same as IDD1, Voltage which EXT/pin voltage holding “H” level No external components, CE=VDD, VOUT=0V No external components, XC6365 CE=VOUT=VDD XC6366 No external components, CE=VOUT=0V Measuring of EXT/ waveform, VIN=output voltage + 0.1V No load (XC6366 only) No external components, VOUT=0V, Voltage which EXT/pin voltage holding “L” level No external components, VOUT=0V, Voltage which EXT/pin voltage holding “H” level Same as IDD2, VEXT/=VDD-0.4V Same as IDD1, VEXT/=0.4V Use of a XP162A12A6 transistor recommended Connect RSS, CSS, CE, 0V→ 3.0V (When VIN≦3.0V, VIN=3.0V) MIN. 3.218 10.0 TYP. 3.300 - MAX. UNITS 3.383 V V 0.9 - 2.2 V - 57 57 15 - 102 102 27 0.5 μA μA μA μA 255 300 345 kHz 100 15 25 35 % % 0.65 - - V - - 0.20 V - 16 14 22 19 μA μA - 92 - % 5 10 20 ms Conditions: 1. Unless otherwise stated, connect external components. VIN=VDD = 5.0V, IOUT = 220mA 2. XC6365/66C series external components: CSS=0.033μF, RSS=470kΩ 5/23 XC6365/XC6366 Series ■ELECTRICAL CHARACTERISTICS (Continued) XC6365A503MR, XC6366A503MR PARAMETER SYMBOL Output Voltage VOUT Maximum Input Voltage VIN U.V.L.O. Voltage VUVLO (Minimum Operating Voltage) Supply Current 1 IDD1 Supply Current 2 IDD2 Stand-by Current ISTB Oscillation Frequency FOSC Maximum Duty Ratio PFM Duty Ratio MAXDTY PFMDTY CE "High" Voltage VCEH CE "Low" Voltage VCEL EXT "High" ON Resistance EXT "Low" ON Resistance REXTBH REXTBL Efficiency EFFI Soft-Start Time TSS Conditions: (VOUT=5.0V, FOSC=300kHz) CONDITIONS Same as IDD1, Voltage which EXT/pin voltage holding “H” level No external components, CE=VDD, VOUT=0V No external components, XC6365 CE=VOUT=VDD XC6366 No external components, CE=VOUT=0V Measuring of EXT/ waveform, VIN=output voltage + 0.1V No load (XC6366 only) No external components, VOUT=0V, Voltage which EXT/pin voltage holding “L” level No external components, VOUT=0V, Voltage which EXT/pin voltage holding “H” level Same as IDD2, VEXT/=VIN-0.4V Same as IDD1, VEXT/=0.4V Use of a XP162A12A6 transistor recommended Connect RSS, CSS, CE, 0V→ 3.0V (When VIN≦3.0V, VIN=3.0V) 1. Unless otherwise stated, connect external components. VIN=VDD = 7.5V, IOUT = 330mA 2. XC6365/66C series external components: CSS=0.033μF, RSS=470kΩ 6/23 Ta=25℃ MIN. 4.875 10.0 TYP. 5.000 - MAX. UNITS 5.125 V V 0.9 - 2.2 V - 67 67 16 - 122 122 29 0.5 μA μA μA μA 255 300 345 kHz 100 15 25 35 % % 0.65 - - V - - 0.20 V - 12 10 17 14 μA μA - 93 - % 5 10 20 ms XC6365/XC6366 Series ■ELECTRICAL CHARACTERISTICS (Continued) XC6365B103MR, XC6366B103MR PARAMETER SYMBOL Output Voltage VOUT Maximum Input Voltage VIN U.V.L.O. Voltage VUVLO (Minimum Operating Voltage) Supply Current 1 IDD1 Supply Current 2 IDD2 Stand-by Current ISTB Oscillation Frequency FOSC Maximum Duty Ratio PFM Duty Ratio MAXDTY PFMDTY CE "High" Voltage VCEH CE "Low" Voltage VCEL EXT "High" ON Resistance EXT "Low" ON Resistance REXTBH REXTBL Efficiency EFFI Soft-Start Time TSS (VOUT=3.0V, FOSC=300kHz) CONDITIONS Same as IDD1, Voltage which EXT/pin voltage holding “H” level No external components, CE=VIN, VOUT=0V No external components, XC6365 CE=VDD, FB=1.2V XC6366 No external components, CE=FB=0V Measuring of EXT/ waveform, VIN=output voltage + 0.1V No load (XC6366 only) No external components, FB=0V, Voltage which EXT/pin voltage holding “L” level No external components, VOUT=0V, Voltage which EXT/pin voltage holding “H” level Same as IDD2, VEXT/=VIN-0.4V Same as IDD1, VEXT/=0.4V Use of a XP162A12A6 transistor recommended Connect RSS, CSS, CE, 0V→ 3.0V (When VIN≦3.0V, VIN=3.0V) Conditions: 1. Unless otherwise stated, connect external components. Ta=25℃ MIN. 2.975 10.0 TYP. 3.000 - MAX. UNITS 3.075 V V 0.9 - 2.2 V - 55 55 15 - 100 100 27 0.5 μA μA μA μA 255 300 345 kHz 100 15 25 35 % % 0.65 - - V - - 0.20 V - 17 15 24 20 μA μA - 92 - % 5 10 20 ms VIN=VDD = 4.5V, IOUT = 200mA 2. XC6365/66C series external components: CSS=0.033μF, RSS=470kΩ 3. RFB1 = 400kΩ, RFB2 = 200kΩ, CFB = 100ppF 7/23 XC6365/XC6366 Series ■TEST CIRCUITS Circuit 1. XC6365A, XC6366A Circuit 2. XC6365B, XC6366B Circuit 3. XC6365C, XC6366C 8/23 XC6365/XC6366 Series ■TEST CIRCUITS (Continued) Circuit 4. XC6365D, XC6366D Circuit 5. XC6365A, XC6366A (when used with a PNP transistor) Circuit 6. XC6365B, XC6366B (when used with a PNP transistor) 9/23 XC6365/XC6366 Series ■TEST CIRCUITS (Continued) Circuit 7. XC6365C, XC6366C (when used with a PNP transistor) Circuit 8. XC6365D, XC6366D (when used with a PNP transistor) Recommended Components Tr : XP162A12A6PR (Torex P-channel Power MOSFET) Please use a PNP transistor where VIN < 2.5V L : 22μH (CR54, SUMIDA, FOSC=300kHz) 47μH (CR75, SUMIDA, FOSC=180kHz) 10μH (CR54, SUMIDA, FOSC=500kHz) SD : MA2Q735 (Schottky Diode, MATSUSHITA) CL :10V, 47μF (Tantalum capacitor, NICHICHEMl MCE) CIN :16V 10μF (Tantalum capacitor, NICHICHEMI MCE) PNP Tr. Type Tr : 2SA1213 (TOSHIBA) RB : 500Ω(Adjust according to load and Tr. hFE levels) CB : 2200pF (Ceramic Type) Set up so that CB≦1 / (2π x RB x FOSC x 0.7) 10/23 C, D type (soft-start externally set-up) CSS : 0.033μF (Ceramic Capacitor) RSS : 470kΩ(C type), 330kΩ(D type) B, D type (FB type) RFB : Set up so that RFB1 / RFB2 = VOUT – 1 (VOUT = setting output voltage), RFB1 = RFB2 ≦ 2MΩ CFB : Set up so that fzfb = 1÷(2π x CFB x RFB1) is within the 0.5 to 20kHz range (10kHz conventional) Adjustments necessary in respect of L, CL. e.g. : VOUT = 3.0V RFB1 = 400kΩ, RFB2 = 200kΩ, CFB = 100pF XC6365/XC6366 Series ■NOTES ON USE 1. Take ample care to ensure that none of the IC's, nor the external component's, absolute maximum ratings are exceeded. 2. Be extremely careful when selecting parts and do not limit your reference to the specifications and characteristics for the DC/DC converter alone. The IC also depends, to a great extent, upon the external components. 3. Arrange the peripherals in the environs of the IC. In order to reduce wiring impedance, use short, thick wires. In particular, wire the load capacitor as close as possible and strengthen the ground wiring sufficiently. 4. Ground current during switching may cause the IC's operations to become unstable due to changes in ground voltage, so please strengthen the IC's GND pin surroundings. ●External Components 1. Setting soft start time To set a longer soft start time, please use XC6365C or XC6365D series which soft start function is externally set up. For the measurement of soft start time TSS, the time is needed to be between the maximum and the minimum value indicated in the chart below. Please set a soft start capacitor CSS according to the application. 2. Setting RFB1 and CFB fzfb=1 ÷ (2 π × CFB × RFB1) As the combination of RFB1 and CFB enable to set fzfb between 0.5kHz to 20kHz, within the realm of fzfb=0.5kHz to fzfb=20kHz as the chart below can be effective. Under normal condition, please set the combination to configure around fzfb=10kHz. 11/23 XC6365/XC6366 Series ■TYPICAL PERFORMANCE CHARACTERISTICS 12/23 XC6365/XC6366 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (Continued) 13/23 XC6365/XC6366 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 14/23 XC6365/XC6366 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (Continued) 15/23 XC6365/XC6366 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 16/23 XC6365/XC6366 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (Continued) 17/23 XC6365/XC6366 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 18/23 XC6365/XC6366 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 19/23 XC6365/XC6366 Series ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 20/23 XC6365/XC6366 Series ■PACKAGING INFORMATION ●SOT-25 21/23 XC6365/XC6366 Series ■MARKING RULE ①Represents product classification 5 ① 1 4 ② ③ ④ 2 3 SOT-25 (TOP VIEW) MARK PRODUCT SERIES MARK PRODUCT SERIES A B C D XC6365A XC6365B XC6365C XC6365D K L M N XC6366A XC6366B XC6366C XC6366D ②Represents integer of output voltage and oscillation frequency OUTPUT VOLTAGE 1.x 2.x 3.x 4.x 5.x 6.x 100 B C D E F H OSCILLATION FREQUENCY (kHz) 180 300 1 2 3 4 5 6 1 2 3 4 5 6 500 B C D E F H ③Represents decimal number of output voltage and oscillation frequency OUTPUT VOLTAGE 100 OSCILLATION FREQUENCY (kHz) 180 300 0 1 2 3 4 5 0 1 2 3 4 5 A B C D E F A B C D E F x.6 x.7 x.8 x.9 6 7 8 9 6 7 8 9 H K L M H K L M ④Represents production lot number 0 to 9, A to Z repeated (G, I, J, O, Q, W excepted) 22/23 500 x.0 x.1 x.2 x.3 x.4 x.5 XC6365/XC6366 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 catalog 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 catalog. 3. Please ensure suitable shipping controls (including fail-safe designs and aging protection) are in force for equipment employing products listed in this catalog. 4. The products in this catalog 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 catalog 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 catalog may be copied or reproduced without the prior permission of Torex Semiconductor Ltd. 23/23