PWM, Switchable Step-Down Converters With Driver Transistor Built-In

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PWM, Switchable Step-Down Converters With Driver Transistor Built-In

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XC9206/XC9207/XC9208 Series
PWM, Switchable Step-Down Converters With Driver Transistor Built-In
ETR0503_002
GO-Compatible
GENERAL DESCRIPTION
XC9206/XC9207/XC9208 series group DC/DC converters with built-in P-channel driver transistor, offered SOT-25 package. designed provide high efficiencies stable power supply with output current 500mA using only coil, diode ceramic capacitors connected externally. Minimum operating voltage XC9206/9207 1.8V 2.0V XC9208. Output voltage internally programmable range from 0.9V 4.0V 100mV increments (accuracy: ±2.0%). Oscillation frequency selectable from 300kHz, 600kHz 1.2MHz that frequency best suited your particular application selected. Each series features different operation modes: control (XC9206 series), automatic PWM/PFM switching control (XC9207 series) manual PWM/PFM switching control (XC9208 series). series gives fast transient response, ripple high efficiency over full range load (from light load high output current conditions). soft start current control functions internally optimized. During stand-by, circuits shutdown reduce current consumption 1.0A less. With built-in U.V.L.O. (Under Voltage Lock Out) function, internal P-channel driver transistor forced when input voltage becomes 1.4V lower.
APPLICATIONS
Mobile phones (PDC, GSM, CDMA, IMT2000 etc.) PDAs, Portable communication modems Portable games Cameras, digital cameras Cordless phones Note book computers
FEATURES
P-ch driver Built-in Output Voltage Range resistance 0.9V 4.0V (100mV increments) Fixed output voltage accuracy
Oscillation Frequency
300kHz, 600kHz, 1.2MHz Fixed oscillation frequency Accuracy ±15% Stand-by function Istb (MAX.) Current Limiter built-in 600mA Input Voltage Range 1.8V 6.0V(XC9206/XC9207) 2.0V 6.0V (XC9208) Output Current 500mA Maximum Duty Ratio 100% PWM/PFM Switching Control (XC9207 XC9208) Ceramic Capacitor Compatible Soft start circuit built-in Small Package SOT-25
TYPICAL APPLICATION CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency Output Current
XC9208A18C VOUT=1.8V (Oscillation Frequency 1.2MHz)
CE/MODE
VOUT MODE
Efficiency EFFI
CIN:4.7 F,CL:10 L:4.7 H(CDRH3D16), SD:CRS02, Topr=25
PWM/PFM Switching Control VIN=2.4V 3.6V 4.2V Control
(ceramic)
VOUT (500mA) (ceramic)
:4.7F (CDRH 3D16,SUMIDA) :CRS02 (SCHOTTKY DIODE,TOSHIBA) :10F (ceramic) :4.7F (ceramic)
1000
Output Current IOUT (mA)
1/16
XC9206/XC9207/XC9208 Series
CONFIGURATION
CE/MODE
ASSIGNMENT
NUMBER NAME VOUT CE/MODE FUNCTION Switching Output Ground Output Voltage Sense Chip Enable/Mode Switch Power Input
VOUT
SOT-25 (TOP VIEW)
PRODUCT CLASSIFICATION
Ordering Information
XC9206: Control XC9207: Automatic Switching Control XC9208: Control, Automatic Switching Control Manually Selectable DESIGNATOR DESCRIPTION Type DC/DC Converter SYMBOL 09~40 Output Voltage 09~40 Oscillation Frequency Package Device Orientation DESCRIPTION 600mA current limiter, Transistor built-in, output voltage internally (VOUT product), soft start internally set. 100mV increments e.g. VOUT=1.5V=1, 1.85V VOUT 2.85V VOUT 300kHz 600kHz 1.2MHz SOT-25 (SOT-23-5) Embossed tape, standard feed Embossed tape, reverse feed
Output voltage 0.9V 4.0V (100mV increments), 1.85V 2.85V standard products. Output voltage other than these available semi-custom products.
2/16
XC9206/XC9207/XC9208
Series
BLOCK DIAGRAM
Note: signal from CE/MODE Control Logic PWM/PFM Selector being fixed level inside, XC9206 series chooses control. signal from CE/MODE Control Logic PWM/PFM Selector being fixed level inside, XC9207 series chooses only PWM/PFM automatic switching control.
ABSOLUTE MAXIMUM RATINGS
PARAMETER Voltage Voltage Voltage VOUT Voltage MODE Voltage Current Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL VOUT Topr Tstg RATINGS 1000
Ta=25 UNITS
3/16
XC9206/XC9207/XC9208 Series
ELECTRICAL CHARACTERISTICS
XC9206A18CMR, XC9207A18CMR, XC9208A18CMR PARAMETER Output Voltage Operating Voltage Range Maximum Output Current U.V.L.O. Voltage Supply Current Supply Current Stand-by Current Oscillation Frequency Pulse Width Rate Maximum Duty Cycle Minimum Duty Cycle Efficiency (*2) Resistance Current Limit Voltage SYMBOL VOUT IOUTMAX VUVLO IDD1 IDD2 ISTB FOSC PFMDTY MAXDTY MINDTY EFFI ILIM VCEH CONDITIONS VOUT=1.8V, FOSC=1.2MHz, Ta=25 MIN. TYP. MAX. UNIT
CIRCUIT
When connected ext. components 1.764 1.800 1.836 CE=VIN, IOUT=30mA (XC9206, 9207) (XC9208) When connected ext. components CE=VIN, VOUT=0V, Voltage which voltage holding level (*1) CE=VIN, VOUT=fixed voltage 0.9V CE=VIN, VOUT=fixed voltage 1.1V CE=VSS, VOUT=fixed voltage 1.1V When connected ext. components CE=VIN, IOUT=30mA When connected ext. components (XC9207, XC9208 only), CE=VIN, IOUT=1mA CE=VIN, VOUT=0V CE=VOUT=VIN When connected ext. components, CE=VIN, IOUT=100mA CE=VIN, VOUT=0V, ILx=400mA (*3) VIN=CE=5.0V, VOUT=0V VOUT=0V, When voltage applied determine (XC9206, 9207) (XC9208) 1.00 1.40 1.78
1.020 1.200 1.380 VIN-0.3 -0.1 -0.1 VIN-1.0 12.0
Voltage Voltage Voltage Current Current Soft-Start Time Latch Time
VCEL VPWMH VPWML ICEH ICEL Tlat
VOUT=0V, When voltage applied determine When connected ext. components (XC9208 only), IOUT=1mA (*4) When connected ext. components (XC9208 only), IOUT=1mA (*4) CE=VIN=5.5V, VOUT=0V CE=0V, VIN=5.5V, VOUT=0V When connected ext. components CE=0V VIN, IOUT=1mA When connected ext. components VIN=CE=5.0V, short VOUT (*5) resistance
Test condition: Unless otherwise stated, 3.6V NOTE: Including hysteresis operating voltage range. EFFI (output voltage output current) (input voltage input current) resistance (measurement voltage) CE/MODE XC9208A series works also external control PWM/PFM control switching pin. When operation, control switched mode when CE/MODE voltage equal greater than minus automatic PWM/PFM switching mode when CE/MODE voltage equal lower than minus equal greater than VCEH. Time until short-circuits VOUT with through resistance from state operation VOUT=0V from current limit pulse generating.
4/16
XC9206/XC9207/XC9208
Series
ELECTRICAL CHARACTERISTICS (Continued)
XC9206A25CMR, XC9207A25CMR, XC9208A25CMR PARAMETER Output Voltage Operating Voltage Range Maximum Output Current U.V.L.O. Voltage Supply Current Supply Current Stand-by Current Oscillation Frequency Pulse Width Rate Maximum Duty Cycle Minimum Duty Cycle Efficiency
(*2)
VOUT=2.5V, FOSC=1.2MHz, Ta=25 CONDITIONS MIN. TYP. MAX. UNIT VIN-1.0
CIRCUIT
SYMBOL VOUT IOUTMAX VUVLO IDD1 IDD2 ISTB FOSC PFMDTY MAXDTY MINDTY EFFI ILIM VCEH VCEL VPWMH VPWML ICEH ICEL
When connected ext. components 2.450 2.500 2.550 CE=VIN, IOUT=30mA (XC9206, 9207) (XC9208) When connected ext. components CE=VIN, VOUT=0V, Voltage which voltage holding level (*1) CE=VIN, VOUT=fixed voltage 0.9V CE=VIN, VOUT=fixed voltage 1.1V CE=VSS, VOUT=fixed voltage 1.1V When connected ext. components CE=VIN, IOUT=30mA When connected ext. components (XC9207, XC9208 only), CE=VIN, IOUT=1mA CE=VIN, VOUT=0V CE=VOUT=VIN When connected ext. components, CE=VIN, IOUT=100mA CE=VIN, VOUT=0V, ILx=400mA (*3) VIN=CE=5.0V, VOUT=0V VOUT=0V, When (XC9206, 9207) voltage applied (XC9208) determine VOUT=0V, When voltage applied determine When connected ext. components (XC9208 only), IOUT=1mA (*4) When connected ext. components (*4) (XC9208 only), IOUT=1mA CE=VIN=5.5V, VOUT=0V CE=0V, VIN=5.5V, VOUT=0V When connected ext. components CE=0V VIN, IOUT=1mA When connected ext. components VIN=CE=5.0V, short VOUT resistance (*5) 1.00 1.40 1.78
1.020 1.200 1.380 VIN-0.3 -0.1 -0.1
Resistance Current Limit Voltage Voltage Voltage Voltage Current Current Soft-Start Time
Latch Time
Tlat
12.0
Test condition Unless otherwise stated, 3.6V NOTE: Including hysteresis operating voltage range. EFFI (output voltage output current) (input voltage input current) resistance (measurement voltage) CE/MODE XC9208A series works also external control PWM/PFM control switching pin. When operation, control switched mode when CE/MODE voltage equal greater than minus automatic PWM/PFM switching mode when CE/MODE voltage equal lower than minus equal greater than VCEH. Time until short-circuits VOUT with through resistance from state operation VOUT=0V from current limit pulse generating.
5/16
XC9206/XC9207/XC9208 Series
ELECTRICAL CHARACTERISTICS (Continued)
XC9206A33CMR, XC9207A33CMR, XC9208A33CMR PARAMETER Output Voltage Operating Voltage Range Maximum Output Current U.V.L.O. Voltage Supply Current Supply Current Stand-by Current Oscillation Frequency Pulse Width Rate Maximum Duty Cycle Minimum Duty Cycle Efficiency
(*2)
SYMBOL VOUT IOUTMAX VUVLO IDD1 IDD2 Istb FOSC PFMDTY MAXDTY MINDTY EFFI ILIM VCEH VCEL VPWMH VPWML ICEH ICEL
CONDITIONS
VOUT=3.3V,FOSC=1.2MHz, Ta=25 MIN. TYP. MAX. UNIT CIRCUIT VIN-1.0
When connected ext. components 3.234 3.300 3.366 CE=VIN, IOUT=30mA (XC9206, 9207) (XC9208) When connected ext. components 1.40 1.78
CE=VIN, VOUT=0V, Voltage which voltage holding 1.00 level (*1) CE=VIN, VOUT=fixed voltage 0.9V CE=VIN, VOUT=fixed voltage 1.1V CE=VSS, VOUT=fixed voltage 1.1V When connected ext. components CE=VIN, IOUT=30mA When connected ext. components (XC9207, XC9208 only), CE=VIN, IOUT=1mA CE=VIN, VOUT=0V CE=VOUT=VIN When connected ext. components, CE=VIN, IOUT=100mA CE=VIN, VOUT=0V, ILx=400mA (*3) VIN=CE=5.0V, VOUT=0V VOUT=0V, When (XC9206, 9207) voltage applied (XC9208) determine VOUT=0V, When voltage applied determine When connected ext. components (*4) (XC9208 only), IOUT=1mA When connected ext. components (XC9208 only), IOUT=1mA (*4) CE=VIN=5.5V, VOUT=0V CE=0V, VIN=5.5V, VOUT=0V When connected ext. components CE=0V VIN, IOUT=1mA When connected ext. components VIN=CE=5.0V, short VOUT resistance (*5)
1.020 1.200 1.380 VIN-0.3 -0.1 -0.1
Resistance Current Limit Voltage Voltage Voltage Voltage Current Current Soft Start Time
Latch Time
Tlat
12.0
Test condition: Unless otherwise stated, 5.0V NOTE: Including hysteresis operating voltage range. EFFI (output voltage output current) (input voltage input current) resistance (measurement voltage) CE/MODE XC9208A series works also external control PWM/PFM control switching pin. When operation, control switched mode when CE/MODE voltage equal greater than minus automatic PWM/PFM switching mode when CE/MODE voltage equal lower than minus equal greater than VCEH. Time until short-circuits VOUT with through resistance from state operation VOUT=0V from current limit pulse generating.
6/16
XC9206/XC9207/XC9208
Series
TYPICAL APPLICATION CIRCUIT
CE/MODE
VOUT MODE
(ceramic)
(ceramic)
VOUT (500mA)
FOSC=1.2MHz 4.7H (CDRH3D16, SUMIDA) CRS02 (TOSHIBA) 4.7F (Ceramic) (Ceramic) FOSC=300kHz (CDRH4D18, SUMIDA) CRS02 (TOSHIBA) 4.7F (Ceramic) (Ceramic)
FOSC=600kHz (CDRH4D18C, SUMIDA) CRS02 (TOSHIBA) 4.7F (Ceramic) (Ceramic)
Schottky diode
XC9206/9207/9208 series wire connection
OPERATIONAL EXPLANATION
Each unit XC9206/9207/9208 series consists reference voltage source, ramp wave circuit, error amplifier, comparator, phase compensation circuit, output voltage adjustment resistors, driver transistor, current limiter circuit, U.V.L.O. circuit others. series compare, using error amplifier, voltage internal voltage reference source with feedback voltage from VOUT through resistors Phase compensation performed resulting error amplifier output, input signal comparator determine turn-on time during operation. comparator compares, terms voltage level, signal from error amplifier with ramp wave from ramp wave circuit, delivers resulting output buffer driver circuit cause output switching duty cycle. This process continuously performed ensure stable output voltage. current feedback circuit monitors P-channel driver transistor current each switching operation, modulates error amplifier output signal provide multiple feedback signals. This enables stable feedback loop even when capacitor, such ceramic capacitor, used, ensuring stable output voltage. Reference Voltage Source reference voltage source provides reference voltage ensure stable output voltage ICs. Ramp Wave Circuit ramp wave circuit determines switching frequency. frequency fixed internally selected from 300kHz, MHz. Clock pulses generated this circuit used produce ramp waveforms needed operation, synchronize internal circuits. Error Amplifier error amplifier designed monitor output voltage. amplifier compares reference voltage with feedback voltage divided internal resistors R2). When voltage lower than reference voltage back, output voltage error amplifier increases. gain frequency characteristics error amplifier output fixed internally deliver optimized signal mixer. <Current Limit> current limiter circuit XC9206/9207/9208 series monitors current flowing through P-channel driver transistor connected pin, features combination constant-current type current limit mode operation suspension mode. When driver current greater than specific level, constant-current type current limit function operates turn pulses from given timing. When driver transistor turned off, limiter circuit then released from current limit detection state. next pulse, driver transistor turned However, transistor immediately turned case over current state. When over current state eliminated, resumes normal operation. waits over current state repeating steps through over current state continues several msec above three steps repeatedly performed, performs function latching state driver transistor, goes into operation suspension mode. Once suspension mode, operations resumed either turning /MODE pin, restoring power pin. suspension mode does mean complete shutdown, state which pulse output suspended; therefore, internal circuitry remains operation. constant-current type current limit XC9206A/9207A/9208A series
Limit
Limit<
Limit
Limit>
Current Limit LEVEL
IOUT
VOUT
CE/MODE
Restart
7/16
XC9206/XC9207/XC9208 Series
OPERATIONAL EXPLANATION (Continued)
U.V.L.O. Circuit> When voltage becomes lower, P-channel output driver transistor forced prevent false pulse output caused unstable operation internal circuitry. When voltage becomes higher, switching operation takes place. releasing U.V.L.O. function, performs soft start function initiate output startup operation. soft start function operates even when voltage falls momentarily below U.V.L.O. operating voltage. U.V.L.O. circuit does cause complete shutdown causes pulse output suspended; therefore, internal circuitry remains operation. Function CE/MODE XC9206/9207/9208 series will enter into shut down state inputting level signal CE/MODE pin. During shut down state, current consumption becomes (TYP.), with state high impedance VOUT pin. starts operation inputting high level signal CE/MODE pin. input CE/MODE CMOS input sink current (TYP.). XC9206A series Examples CE/MODE SW_CE
STATUS Chip Disable control (XC9206), PWM/PFM automatic switching control (XC9207) control (XC9206), PWM/PFM automatic switching control (XC9207) Chip Disable
XC9208A series Examples CE/MODE SW_CE
SW_PMW/PFM
STATUS Synchronous control Non-synchronous PWM/PFM automatic switching control Chip Disable Chip Disable Non-synchronous PWM/PFM automatic switching control Synchronous control
Intermediate voltage generated RM2. Please value each RM1, around 100k. switches, open-drain port transistor used.
XC9207/9208 series features PWM/PFM automatic switching control. With automatic PWM/PFM switching control function, series automatically switched from control control mode under light load conditions. during light load conditions coil current becomes discontinuous on-time rate falls lower than duty, circuit operates output pulse with fixed on-time rate from pin. During operation with this fixed on-time rate, pulses generated different frequencies according conditions moment. This causes reduction number switching operations unit time, resulting efficiency improvement under light load conditions. However, since pulse output frequency constant, consideration should given noise filter like needed. Necessary conditions switching operation depend input voltage, load current, coil value other factors.
8/16
XC9206/XC9207/XC9208
Series
NOTES
Application Information
XC9206/9207/9208 series designed with output ceramic capacitor. however, potential difference between input output large, ceramic capacitor fail absorb resulting high switching energy oscillation could occur output. input-output potential difference large, connect electrolytic capacitor parallel compensate insufficient capacitance. Spike noise ripple voltage arise switching regulator with DC/DC converter. These greatly influenced external component selection, such coil inductance, capacitance values, board layout external components. Once design been completed, verification with actual components should done. When difference between VOUT large load current light, very narrow pulses will outputted, there possibility that some cycles skipped completely.
Oscillation Wave Form (FOSC=1.2MHz) 5.5V, VOUT=1.8V, IOUT=10mA
4.7H CRS02 4.7F
VOUT AC-COUPLED
(CDRH3D16, SUMIDA) (TOSHIBA) (Ceramic) (Ceramic)
When difference between VOUT small, load current heavy, very wide pulses will outputted
there possibility that some cycles skipped completely: this case, all. Oscillation Wave Form (FOSC=1.2MHz) 2.0V, VOUT=1.8V, IOUT=60mA
4.7H CRS02 4.7F
VOUT AC-COUPLED
(CDRH3D16, SUMIDA) (TOSHIBA) (Ceramic) (Ceramic)
With peak current coil controlled current limit circuit. Since peak current increases when dropout voltage load current high, current limit starts operating, this lead instability. When peak current becomes high, please adjust coil inductance value fully check circuit operation. addition, please calculate peak current according following formula: (VIN VOUT) Duty FOSC) IOUT OnDuty: OnDuty ratio Driver Transistor Coil Inductance Value FOSC Oscillation Frequency When peak current which exceeds limit current flows within specified time, built-in P-ch driver transistor turned off. During time until detects limit current before built-in transistor turned off, current limit current flows; therefore, care must taken when selecting rating coil schottky diode. When less than 2.4V, limit current reached because voltage falls caused resistance.
9/16
XC9206/XC9207/XC9208 Series
NOTES (Continued)
Application Information (Continued)
Care must taken when laying Board, order prevent misoperation current limit mode. Depending state Board, latch time become longer latch operation work. order avoid effect noise, board should laid that capacitors placed close chip possible. voltages below recommended voltage range lead instability. This should used within stated absolute maximum ratings order prevent damage device. Depending input-output voltage differential, load current, some pulses skipped, ripple voltage increase. When series' duty cycle digitally signalized, linear duty cycle digitally signalized duty cycle cannot carry completely same change, which means that duty cycle does change linearly. output stabilized applying phase compensation adjusting duty cycle, even when duty cycle loses linear change whole circuit. When state where output stabilized continued applying phase compensation duty cycle which lost linearity, ripple voltage does increase more than ripple voltage increase about several 10mV according operating conditions. possible, increasing capacitance values, reduce ripple voltage. operating conditions greatly influenced dropout voltage, load current, delay-time, external components, such coil inductance, capacitance values. Verification with actual parts should done.
Increase Ripple Voltage (1.2MHz) VIN=4.2V, VOUT=1.8V, IOUT=180mA VIN=4.2V, VOUT=1.8V, IOUT=60mA
CH1:
CH1:
CH2: VOUT AC-COUPLED
CH2: VOUT AC-COUPLED
VIN=3.6V, VOUT=1.8V, IOUT=30mA
CH1:
4.7H CRS02 4.7F
CH2: VOUT AC-COUPLED
(CDRH3D16, SUMIDA) (TOSHIBA) (Ceramic) (Ceramic)
10/16
XC9206/XC9207/XC9208
Series
NOTES (Continued)
Instructions Pattern Layout order stabilize VDD's voltage level, recommend that by-pass capacitor (CIN) connected close possible pins. Please mount each external component close possible, connect with shortest possible traces. Wire external components close possible thick, short connecting traces reduce circuit impedance. Make sure that traces thick possible, variations ground potential caused high ground currents time switching result instability. Please connect anode directly by-pass capacitor order minimize noise affect Also, take distance between anode having large impedance possible. recommend that ferrite bead mount pattern arranged case that noise reduced using pattern layout shown below. Please make traces under carry switching main current. cause malfunction
<TOP VIEW>
<BOTTOM VIEW>
VOUT
XC9206/07/08 R.1.1 SOT-25
Ferrite Bead Figure XC9206/07/08Series Pattern Layout
11/16
XC9206/XC9207/XC9208 Series
TEST CIRCUITS
Circuit
VOUT /MODE
Circuit
VOUT /MODE
Circuit
VOUT /MODE
Circuit
VOUT /MODE
Circuit
VOUT /MODE
Circuit
VOUT /MODE
1.2MHz 4.7F (ceramic) (ceramic) 4.7H Schottky Diode
600kHz 4.7F (ceramic) (ceramic) Schottky Diode
300kHz 4.7F (ceramic) (ceramic) Schottky Diode
12/16
XC9206/XC9207/XC9208
Series
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage Output Current
XC9208A18C VOUT=1.8V (Oscillation Frequency1.2MHz)
CIN:4.7 F,CL:10 L:4.7 H(CDRH3D16), SD:CRS02, Topr=25
XC9208A186 VOUT=1.8V (Oscillation Frequency 600kHz)
CIN:4.7 F,CL:10 L:10 H(CDRH4D18C), SD:CRS02, Topr=25
Output Voltage: VOUT Output Voltage VOUT
Output Voltage: VOUT Output Voltage VOUT
PWM/PFM Switching Control
VIN=2.4V
PWM/PFM Switching Control
3.6V, 4.2V
Control
3.6V
4.2V
Control
VIN=2.4V
1000
1000
Output Current IOUT (mA) Output Current: IOUT
Output Current IOUT (mA) Output Current: IOUT (mA) Output Current: IOUT (mA)
Efficiency Output Current
XC9208A183 VOUT=1.8V (Oscillation Frequency 300kHz)
CIN:4.7 F,CL:10 L:22 H(CDRH4D28C), SD:CRS02, Topr=25
Output Voltage VOUT Voltage: VOUT
PWM/PFM Switching Control
3.6V, 4.2V
Control
VIN=2.4V
1000
Output Current IOUT (mA) Output Current: IOUT (mA)
Efficiency: EFFI
Output Current: IOUT (mA)
Efficiency: EFFI
Output Current: IOUT (mA)
Efficiency: EFFI
Output Current: IOUT (mA)
13/16
XC9206/XC9207/XC9208 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Ripple Voltage Output Current
XC9208A18C VOUT=1.8V (Oscillation Frequency 1.2MHz)
CIN:4.7 F,CL:10 L:4.7 H(CDRH3D16), SD:CRS02, Topr=25
XC9208A186 VOUT=1.8V (Oscillation Frequency 600kHz)
CIN:4.7 F,CL:10 L:10 H(CDRH4D18C),
Ripple Voltage: (mV) Ripple Voltage (mV) 1000
PWM/PFM Switching Control VIN=2.4V Control 4.2V 3.6V
SD:CRS02, Topr=25
Ripple Voltage: (mV) Ripple Voltage (mV)
Control
PWM/PFM Switching Control 3.6V
4.2V VIN=2.4V
1000
Output Current IOUT (mA) Output Current: IOUT(mA)
Output Current IOUT (mA) Output Current: IOUT (mA)
XC9208A183 VOUT=1.8V (Oscillation Frequency 300kHz)
CIN:4.7 F,CL:10 L:22 H(CDRH3D28C),
Ripple Voltage Ripple Voltage: (mV)
PWM/PFM Switching Control
SD:CRS02, Topr=25
Control 3.6V VIN=2.4V 4.2V
1000
Output Current IOUT (mA) Output Current: IOUT(mA)
PACKAGING INFORMATION
SOT-25
14/16
XC9206/XC9207/XC9208
Series
MARKING RULE
SOT-25
Represents product name type DC/DC converters MARK
Character inversion used.
PRODUCT SERIES XC9206AxxxMx XC9207AxxxMx XC9208AxxxMx
SOT-25 (TOP VIEW)
Represents integer output voltage oscillation frequency MARK FOSC=300kHz XC920xxx3Mx FOSC=600kHz XC920xxx6Mx FOSC=1.2MHz XC920xxxCMx OUTPUT VOLTAGE
Represents decimal number output voltage oscillation frequency MARK FOSC=300kHz XC920xxx3Mx FOSC=600kHz XC920xxx6Mx FOSC=1.2MHz XC920xxxCMx OUTPUT VOLTAGE
Output voltage 0.9V 4.0V (100mV increments), 1.85V 2.85V standard products. Output voltages other than these available semi-custom products.
example
OSCILLATION FREQUENCY 300kHz 600kHz 1.2MHz VOUT=3.3V MARK VOUT=5.0V VOUT=1.85V
Represents production number repeated excepted)
15/16
XC9206/XC9207/XC9208 Series
products product specifications contained herein subject change without notice improve performance characteristics. Consult representatives before use, confirm that information this catalog date. assume responsibility infringement patents, patent rights, other rights arising from information circuitry this catalog. Please ensure suitable shipping controls (including fail-safe designs aging protection) force equipment employing products listed this catalog. products this catalog developed, designed, approved with such equipment whose failure malfunction reasonably expected directly endanger life cause significant injury user. (e.g. Atomic energy; aerospace; transport; combustion associated safety equipment thereof.) Please products listed this catalog within specified ranges. Should wish products under conditions exceeding specifications, please consult representatives. assume responsibility damage loss abnormal use. rights reserved. part this catalog copied reproduced without prior permission Torex Semiconductor Ltd.
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PWM, Switchable Step-Down Converters With Driver Transistor Built-In

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