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XC6365/XC6366 Series
PWM Controlled, PWM/PFM Switchable Step-Down DC/DC Converters
ETR0501_003
GreenOperation-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 0.1V 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 10ms 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 0.5 A. With UVLO internal, the external transistor will be forcibly switched off if used below the stipulated voltage.
APPLICATIONS
Electronic information organizers Palmtops Cellular and portable phones Portable audio systems Various multi-function power supplies
FEATURES
Input Voltage Range : 2.2V ~ 10V (VOUT type) Output Voltage Range : 1.5V ~ 6.0V programmable in 0.1V increments (2.5%) Oscillation Frequency : 300kHz (15%) : Custom products for 180, 500kHz Output Current High Efficiency : More than 1.0A (VIN=5.0V, VOUT=3.0V) : 92% (TYP.) Stand-by Capability : ISTB=0.5 A (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 : SOT-25, USP-6C
TYPICAL APPLICATION CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
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XC6365/XC6366 Series
PIN CONFIGURATION
*The dissipation pad of the USP-6C package should be left open. If the circuit needs to be connected to other pin, it should be connected to the VDD (No.2) pin.
PIN ASSIGNMENT
PIN NUMBER SOT-25 1 2 3 4 5 USP-6 3 2 1 6 4 5 PIN NAME EXT/ VDD GND CE VOUT (FB) NC FUNCTION 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) No Connection
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PRODUCT CLASSIFICATION
Selection Guide
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XC6365/XC6366
Series
PRODUCT CLASSIFICATION (Continued)
Ordering Information
XC6365 XC6366 DESIGNATOR PWM control PWM/PFM switching control DESCRIPTION SYMBOL A Type of DC/DC Converter B C D Output Voltage 15 60 10 3 Oscillation Frequency 5 2 Package Device Orientation M E R L DESCRIPTION : VOUT type: Internally set-up, soft-start internally set-up : FB type: Externally set-up, soft-start internally set-up : VOUT type: Internally set-up, soft-start externally set-up : FB type: Externally set-up, soft-start internally set-up : VOUT type: 3.0V output : FB type: 10 fixed : 300kHz : 500kHz (custom) : 180kHz (custom) : SOT-25 (SOT-23-5) : USP-6C : Embossed tape, standard feed : Embossed tape, reverse feed =1, =3, =0 =0 fixed
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XC6365/XC6366 Series
BLOCK DIAGRAMS
XC6365, XC6366 Series A, C type (VOUT)
XC6365, XC6366 Series B, D type (FB)
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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 SOT-25 Power Dissipation USP-6C Operating Temperature Range Storage Temperature Range
Note: Voltage is all ground standardized.
SYMBOL VDD VOUT VFB VCE VEXT/
IEXT/
Pd Topr Tstg
RATINGS -0.3 ~ +12 -0.3 ~ VIN +0.3 -0.3 ~ VIN +0.3 -0.3 ~ VIN +0.3 -0.3 ~ VIN +0.3 100 150 100 -30 ~ +80 -40 ~ +125
UNITS V V V V V mA mW
ELECTRICAL CHARACTERISTICS
XC6365A333MR, XC6366A333MR PARAMETER Output Voltage Maximum Input Voltage UVLO Voltage (Minimum Operating Voltage) Supply Current 1 Supply Current 2 Stand-by Current Oscillation Frequency Maximum Duty Ratio PFM Duty Ratio CE "High" Voltage CE "Low" Voltage EXT "High" ON Resistance EXT "Low" ON Resistance Efficiency Soft-Start Time SYMBOL VOUT VIN VUVLO IDD1 IDD2 ISTB fOSC MAXDTY PFMDTY VCEH VCEL REXTBH REXTBL EFFI tSS (VOUT=3.3V, CONDITIONS fOSC=300kHz) MIN. 3.218 10.0 0.9 255 100 15 0.65 5 TYP. 3.300 57 57 15 300 25 16 14 92 10 Ta=25 MAX. UNITS 3.383 V V 2.2 102 102 27 0.5 345 35 0.20 22 19 20 V A A A A kHz % % V V A A %
ms
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)
Conditions: 1. Unless otherwise stated, connect external components. VIN=VDD = 5.0V, IOUT = 220mA 2. XC6365/66C series external components: CSS=0.033 F, RSS=470k
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XC6365/XC6366 Series
ELECTRICAL CHARACTERISTICS (Continued)
XC6365A503MR, XC6366A503MR PARAMETER SYMBOL Output Voltage VOUT Maximum Input Voltage VIN UVLO Voltage VUVLO (Minimum Operating Voltage) Supply Current 1 IDD1 Supply Current 2 Stand-by Current Oscillation Frequency Maximum Duty Ratio PFM Duty Ratio CE "High" Voltage CE "Low" Voltage EXT "High" ON Resistance EXT "Low" ON Resistance Efficiency Soft-Start Time
Conditions:
(VOUT=5.0V, fOSC=300kHz) CONDITIONS MIN. 4.875 10.0 0.9 255 100 15 0.65 5 TYP. 5.000 67 67 16 300 25 12 10 93 10
Ta=25 MAX. UNITS 5.125 V V 2.2 122 122 29 0.5 345 35 0.20 17 14 20 V A A A A kHz % % V V A A % ms
IDD2 ISTB fOSC MAXDTY PFMDTY VCEH VCEL REXTBH REXTBL EFFI tSS
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=0.033 F, RSS=470k
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Series
ELECTRICAL CHARACTERISTICS (Continued)
XC6365B103MR, XC6366B103MR PARAMETER SYMBOL Output Voltage VOUT Maximum Input Voltage VIN UVLO Voltage VUVLO (Minimum Operating Voltage) Supply Current 1 IDD1 Supply Current 2 Stand-by Current Oscillation Frequency Maximum Duty Ratio PFM Duty Ratio CE "High" Voltage CE "Low" Voltage EXT "High" ON Resistance EXT "Low" ON Resistance Efficiency Soft-Start Time IDD2 ISTB fOSC MAXDTY PFMDTY VCEH VCEL REXTBH REXTBL EFFI tSS CONDITIONS (VOUT=3.0V, fOSC=300kHz) MIN. 2.925 10.0 0.9 255 100 15 0.65 5 TYP. 3.000 55 55 15 300 25 17 15 92 10 Ta=25 MAX. UNITS 3.075 V V 2.2 100 100 27 0.5 345 35 0.20 24 20 20 V A A A A kHz % % V V A A % ms
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)
VIN=VDD = 4.5V, IOUT = 200mA F, RSS=470k
Conditions: 1. Unless otherwise stated, connect external components. 2. XC6365/66C series external components: CSS=0.033 3. RFB1 = 400k , RFB2 = 200k , CFB = 100ppF
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XC6365/XC6366 Series
TEST CIRCUITS
Circuit 1. XC6365A, XC6366A
Circuit 2. XC6365B, XC6366B
Circuit 3. XC6365C, XC6366C
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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)
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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 : 22 H (CR54, SUMIDA, fOSC=300kHz) 47 H (CR75, SUMIDA, fOSC=180kHz) 10 H (CR54, SUMIDA, fOSC=500kHz) SD : MA2Q735 (Schottky Diode, MATSUSHITA) CL :10V, 47 F (Tantalum capacitor, NICHICHEMl MCE) CIN :16V 10 F (Tantalum capacitor, NICHICHEMI MCE) PNP Tr. Type Tr : 2SA1213 (TOSHIBA) RB : 500 (Adjust according to load and Tr. hFE levels) CB : 2200pF (Ceramic Type) Set up so that CB 1 / (2 x RB x FOSC x 0.7)
C, D type (soft-start externally set-up) CSS : 0.033 F (Ceramic Capacitor) RSS : 470k(C type), 330k(D type) B, D type (FB type) RFB : Set up so that RFB1 / RFB2 = VOUT - 1 (VOUT = setting output voltage), RFB1 = RFB2 2M CFB : Set up so that fzfb = 1 (2 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 = 400k, RFB2 = 200k, CFB = 100pF
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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 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.
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XC6365/XC6366 Series
TYPICAL PERFORMANCE CHARACTERISTICS
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XC6365/XC6366
Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(Continued)
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XC6365/XC6366 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
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XC6365/XC6366
Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(Continued)
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XC6365/XC6366 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
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XC6365/XC6366
Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(Continued)
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XC6365/XC6366 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
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XC6365/XC6366
Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
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XC6365/XC6366 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
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XC6365/XC6366
Series
PACKAGING INFORMATION
SOT-25 USP-6C
USP-6C Reference Pattern Layout
USP-6C Reference Metal Mask Design
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XC6365/XC6366 Series
MARKING RULE
Represents product classification
5

4
MARK A B C D
PRODUCT SERIES XC6365A XC6365B XC6365C XC6365D
MARK K L M N
PRODUCT SERIES XC6366A XC6366B XC6366C XC6366D
1
2
3
SOT-25 (TOP VIEW)
Represents 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
Represents decimal number of output voltage and oscillation frequency OUTPUT VOLTAGE x.0 x.1 x.2 x.3 x.4 x.5 x.6 x.7 x.8 x.9 100 0 1 2 3 4 5 6 7 8 9 OSCILLATION FREQUENCY (kHz) 180 300 0 1 2 3 4 5 6 7 8 9 A B C D E F H K L M 500 A B C D E F H K L M
Represents production lot number 0 to 9, A to Z repeated (G, I, J, O, Q, W excepted)
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XC6365/XC6366
Series
MARKING RULE (Continued)
Represents product series MARK PRODUCT SERIES
2 0
XC6365****E* XC6366****E*
USP-6C (TOP VIEW)
Represents product classification MARK PRODUCT SERIES
A B C D
XC6365/66A***E* XC6365/66B***E* XC6365/66C***E* XC6365/66D***E*
Represents output voltage
e.g.:
MARK
OUTPUT VOLTAGE (V) 3 0 3.3 5.0
PRODUCT SERIES
3 5
XC6365/66*33*E* XC6365/66*50*E*
Represents oscillation frequency MARK
2 3 5
OCSILLATION FREQUENCY 180kHz 300kHz 500kHz
PRODUCT SERIES
XC6365/66***2E* XC6365/66***3E* XC6365/66***5E*
Represents production lot number 0 to 9, A to Z repeated (G, I, J, O, Q, W excepted)
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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 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.
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