XCL205/XCL206/XCL207 Series
ETR2801-008
Inductor Built-in Step-Down “micro DC/DC” Converters
☆GreenOperation Compatible
■GENERAL DESCRIPTION
The XCL205/XCL206/XCL207 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a
control IC in one tiny package (2.5mm×2.0mm, H=1.0mm). A stable power supply with an output current of 600mA is
configured using only two capacitors connected externally.
Operating voltage range is from 2.0V to 6.0V. Output voltage is internally set in a range from 0.8V to 4.0V in increments of
0.05V. The device is operated by 3.0MHz, and includes 0.42ΩP-channel driver transistor and 0.52ΩN-channel switching
transistor. As for operation mode, the XCL205 series is PWM control, the XCL206 series is automatic PWM/PFM switching
control and the XCL207 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). During stand-by, the device is shutdown to reduce current consumption to as low as 1.0μA or less. With the
built-in UVLO (Under Voltage Lock Out) function, the internal driver transistor is forced OFF when input voltage becomes 1.4V
or lower. XCL205B/XCL206B/XCL207B series provide short-time turn-on by the soft start function internally set in 0.25 ms
(TYP). XCL205B(C) /XCL206 B(C) / XCL207B(C) integrate CL auto discharge function which enables the electric charge
stored at the output capacitor CL to be discharged via the internal auto-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.
■FEATURES
■APPLICATIONS
Ultra Small
Input Voltage
Output Voltage
High Efficiency
Output Current
Oscillation Frequency
Maximum Duty Cycle
Capacitor
CE Function
●Mobile phones, Smart phones
●Bluetooth Headsets
●WiMAX PDAs, MIDs, UMPCs
●Portable game consoles
●Digital cameras, Camcorders
●Electronic dictionaries
: 2.5mm×2.0mm, H=1.0mm
: 2.0V ~ 6.0V
: 0.8V ~ 4.0V (+2.0%)
: 90% (VIN=4.2V, VOUT=3.3V)
: 600mA
: 3.0MHz (+15%)
: 100%
: Low ESR Ceramic
: Active High
Soft-Start Circuit Built-In
CL High Speed Auto Discharge
:Current Limiter Circuit Built-In
(Constant Current & Latching)
: PWM (XCL205)
PWM/PFM Auto (XCL206)
PWM/PFM Manual (XCL207)
Protection Circuits
Control Methods
* Performance depends on external components and wiring on the PCB.
■TYPICAL APPLICATION CIRCUIT ■TYPICAL PERFORMANCE
CHARACTERISTICS
XCL205A333xx/XCL206A333xx/XCL207A333xx
XCL205/206/207 Series
100
L1
80
LX
VIN
Vss
Vss
VOUT
CE/MODE
CIN
4.7μF
600mA
Efficency:EFFI(%)
CL
10μF
XCL206/XCL207(PWM/PFM)
60
VIN= 5.5V
5.0V
4.2V
40
XCL205/XCL207
(PWM)
20
L2
VOUT=3.3V
0
(TOP VIEW)
* “L1 and LX”, and “L2 and VOUT” is connected by wiring.
0.1
1
10
100
1000
Output Current:IOUT (mA)
1/26
XCL205/XCL206/XCL207 Series
■PIN CONFIGURATION
L1
7
VIN 6
1 Lx
Vss 5
2 Vss
* It should be connected the VSS pin (No. 2 and 5) to the GND pin.
* If the dissipation pad needs to be connected to other pins, it should be
connected to the GND pin.
CE/MODE 4
3 VOUT
* Please refer to pattern layout page for the connecting to PCB.
8
L2
(BOTTOM VIEW)
■PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTION
1
2,5
3
4
6
7
8
Lx
VSS
VOUT
CE / MODE
VIN
L1
L2
Switching Output
Ground
Output Voltage
Chip Enable & Mode Switch
Power Input
Inductor Electrodes
■PRODUCT CLASSIFICATION
●Ordering
Information
XCL205①②③④⑤⑥-⑦(*1) Fixed PWM control
XCL206①②③④⑤⑥-⑦(*1) PWM / PFM automatic switching control
XCL207①②③④⑤⑥-⑦(*1) Manual Mode Selection Pin (Semi-custom)
DESIGNATOR
①
②③
(*1)
(*2)
ITEM
SYMBOL
Functions selection
(All CE active high)
Output Voltage
(*2)
④
Oscillation Frequency
⑤⑥-⑦(*1)
Package
(Oder Unit)
A
B
C
10
12
14
15
18
19
25
28
2L
30
33
3
AR-G
DESCRIPTION
No CL auto discharge, Standard soft-start
CL auto discharge, High speed soft-start
CL auto discharge, Standard soft-start
1.0V
1.2V
1.4V
1.5V
1.8V
1.9V
2.5V
2.8V
2.85V
3.0V
3.3V
3.0MHz
CL-2025 (3,000Reel)
The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.
When other output voltages are needed, please contact your local Torex sales office for more information.
Output voltage range is 0.8~4.0V.
2/26
XCL205/XCL206/XCL207
Series
■BLOCK DIAGRAM
●XCL205A / XCL206A / XCL207A series
L2
L1
Inductor
Phase
Compensation
VOUT
Current Feedback
Current Limit
CFB
R2
Error Amp.
PWM
Comparator
FB
Synch
Buffer
Drive
Logic
R1
VIN
Lx
VSHORT
Vref with
Soft Start,
CE
PWM/PFM
Selector
VSS
Ramp Wave
Generator
OSC
UVLO Cmp
VSS
UVLO
R3
CE/MODE
Control
Logic
R4
CE/MODE
NOTE: The XCL205 offers a fixed PWM control, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to "L" level inside.
The XCL206 control scheme is PWM/PFM automatic switching, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to
"H" level inside.
The diodes placed inside are ESD protection diodes and parasitic diodes.
●XCL205B / XCL206B / XCL207B / XCL205C / XCL206C / XCL207C series
L2
L1
Inductor
Phase
Compensation
VOUT
Current Feedback
Current Limit
CFB
R2
Error Amp.
PWM
Comparator
FB
Synch
Buffer
Drive
Logic
R1
VIN
Lx
VSHORT
Vref with
Soft Start,
CE
PWM/PFM
Selector
VSS
UVLO Cmp
VSS
Ramp Wave
Generator
OSC
CE/
UVLO
R3
CE/MODE
Control
Logic
R4
CE/MODE
NOTE: The XCL205 offers a fixed PWM control, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to "L" level inside.
The XCL206 control scheme is PWM/PFM automatic switching, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to
"H" level inside.
The diodes placed inside are ESD protection diodes and parasitic diodes.
■ABSOLUTE MAXIMUM RATINGS
Ta = 25℃
PARAMETER
SYMBOL
RATINGS
UNITS
VIN Pin Voltage
LX Pin Voltage
VOUT Pin Voltage
CE/MODE Pin Voltage
LX Pin Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
VIN
VLX
VOUT
VCE
ILX
Pd
Topr
Tstg
- 0.3 ~ 6.5
- 0.3 ~ VIN + 0.3≦6.5
- 0.3 ~ 6.5
- 0.3 ~ 6.5
±1500
1000*1
- 40 ~ + 85
- 40 ~ + 105
V
V
V
V
mA
mW
℃
℃
*1: The power dissipation figure shown is PCB mounted (40mm×40mm, t=1.6mm, Glass Epoxy FR-4).
Please refer to page 16 for details.
3/26
XCL205/XCL206/XCL207 Series
■ELECTRICAL CHARACTERISTICS
●XCL205A123AR/XCL206A123AR/XCL207A123AR, VOUT=1.2V, fOSC=3.0MHz, Ta=25℃
PARAMETER
SYMBOL
Output Voltage
VOUT
Operating Voltage Range
VIN
CONDITIONS
When connected to external components,
VIN=VCE=5.0V, IOUT=30mA
Maximum Output Current
IOUTMAX
VIN=VOUT(T)+2.0V, VCE=1.0V
(*9)
When connected to external components
UVLO Voltage
VUVLO
VCE=VIN,VOUT=0V,
(*1, *11)
Voltage which Lx pin holding “L” level
Supply Current (XCL205)
Supply Current (XCL206, XCL207)
Stand-by Current
Oscillation Frequency
(*12)
PFM Switching Current
PFM Duty Limit
(*12)
IDD
VIN=VCE=5.0V, VOUT=VOUT(T)×1.1V
MIN.
TYP.
MAX.
UNITS CIRCUIT
1.176
1.200
1.224
V
①
2.0
-
6.0
V
①
600
-
-
mA
①
1.00
1.40
1.78
V
③
-
46
65
-
21
35
μA
②
ISTB
VIN=5.0V, VCE=0V, VOUT=VOUT(T)×1.1V
-
0
1.0
μA
②
fOSC
When connected to external components,
VIN=VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA
2550
3000
3450
kHz
①
IPFM
When connected to external components,
(*12)
VIN=VOUT(T)+2.0V, VCE=VIN , IOUT=1mA
190
260
350
mA
⑩
-
200
300
%
①
DMAX
VIN=VCE=5.0V, VOUT=VOUT (T)×0.9V
100
-
-
%
③
Minimum Duty Cycle
DMIN
VIN=VCE=5.0V, VOUT=VOUT (T)×1.1V
-
-
0
%
③
-
82
-
%
①
900
0.35
0.42
0.45
0.52
0.01
0.01
1050
0.55
0.67
0.66
0.77
1.0
1.0
1350
Ω
Ω
Ω
Ω
μA
μA
mA
④
④
⑤
⑤
⑥
-
±100
-
ppm/ ℃
①
0.65
-
VIN
V
③
VSS
-
0.25
V
③
-
-
VIN - 1.0
V
①
VIN 0.25
-
-
V
①
- 0.1
- 0.1
-
0.1
0.1
μA
μA
⑤
⑤
0.5
0.9
2.5
ms
①
1.0
-
20
ms
⑦
0.450
0.600
0.750
V
⑦
-
1.5
1000
-
μH
mA
Efficiency
EFFI
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
(*5)
Lx SW "L" Leak Current
(*10)
Current Limit
Output Voltage
Temperature Characteristics
RLｘH
RLｘH
RLｘL
RLｘL
ILeakH
ILeakL
ILIM
△VOUT/
(VOUT・△topr)
CE "H" Voltage
VCEH
CE "L" Voltage
VCEL
PWM "H" Level Voltage
(*13)
VPWMH
PWM "L" Level Voltage
(*13)
VPWML
CE "H" Current
CE "L" Current
ICEH
ICEL
Soft Start Time
tSS
Latch Time
tLAT
Short Protection
Threshold Voltage
VSHORT
Inductance Value
Allowed Inductor Current
L
IDC
VCE= VIN=(C-1) IOUT=1mA
(*12)
Maximum Duty Cycle
DTYLIMIT_PFM
When connected to external components,
VCE=VIN＝VOUT (T)+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
IOUT =30mA
-40℃≦Topr≦85℃
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “H” level
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “L” level
When connected to external components,
(*6),
IOUT=1mA
Voltage which oscillation
(*13)
frequency becomes 2550kHz≦fOSC≦3450kHz
When connected to external components,
(*6)
IOUT=1mA , Voltage which oscillation
(*13)
frequency 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(T)
(*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
Test frequency=1MHz
ΔT=40℃
Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T)=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: Design value
*5: When temperature is high, a current of approximately 10μA (maximum) may leak.
*6: The CE/MODE pin of the XCL207 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: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series)
*13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series)
4/26
XCL205/XCL206/XCL207
Series
■ELECTRICAL CHARACTERISTICS (Continued)
●XCL205A183AR/XCL206A183AR/XCL207A183AR, VOUT=1.8V, fOSC=3.0MHz, Ta=25℃
PARAMETER
SYMBOL
Output Voltage
VOUT
Operating Voltage Range
VIN
CONDITIONS
When connected to external components,
VIN=VCE=5.0V, IOUT=30mA
Maximum Output Current
IOUTMAX
VIN=VOUT(E)+2.0V, VCE=1.0V
(*9)
When connected to external components
UVLO Voltage
VUVLO
VCE=VIN,VOUT=0V,
(*1, *11)
Voltage which Lx pin holding “L” level
Supply Current (XCL205)
Supply Current (XCL206, XCL207)
Stand-by Current
Oscillation Frequency
(*12)
PFM Switching Current
PFM Duty Limit
(*12)
IDD
VIN=VCE=5.0V, VOUT=VOUT(T)×1.1V
MIN.
TYP.
MAX.
UNITS CIRCUIT
1.764
1.800
1.836
V
①
2.0
-
6.0
V
①
600
-
-
mA
①
1.00
1.40
1.78
V
③
-
46
65
-
21
35
μA
②
ISTB
VIN=5.0V, VCE=0V, VOUT=VOUT(T)×1.1V
-
0
1.0
μA
②
fOSC
When connected to external components,
VIN=VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA
2550
3000
3450
kHz
①
IPFM
When connected to external components,
(*12)
VIN=VOUT(T)+2.0V, VCE=VIN , IOUT=1mA
170
220
270
mA
⑩
-
200
300
%
①
100
-
-
%
③
-
-
0
%
③
-
85
-
%
①
900
0.35
0.42
0.45
0.52
0.01
0.01
1050
0.55
0.67
0.66
0.77
1.0
1.0
1350
Ω
Ω
Ω
Ω
μA
μA
mA
④
④
⑤
⑤
⑥
-
±100
-
ppm/ ℃
①
0.65
-
VIN
V
③
VSS
-
0.25
V
③
-
-
VIN - 1.0
V
①
VIN 0.25
-
-
V
①
- 0.1
- 0.1
-
0.1
0.1
μA
μA
⑤
⑤
0.5
0.9
2.5
ms
①
1.0
-
20
ms
⑦
0.675
0.900
1.125
V
⑦
-
1.5
1000
-
μH
mA
DTYLIMIT_PFM
VCE= VIN=(C-1) IOUT=1mA
(*12)
Maximum Duty Cycle
DMAX
VIN=VCE=5.0V, VOUT=VOUT (T)×0.9V
Minimum Duty Cycle
DMIN
Efficiency
EFFI
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
(*5)
Lx SW "L" Leak Current
(*10)
Current Limit
Output Voltage
Temperature Characteristics
RLｘH
RLｘH
RLｘL
RLｘL
ILeakH
ILeakL
ILIM
△VOUT/
(VOUT・△topr)
CE "H" Voltage
VCEH
CE "L" Voltage
VCEL
VIN=VCE=5.0V, VOUT=VOUT (T)×1.1V
When connected to external components,
VCE=VIN＝VOUT (T)+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
IOUT =30mA
-40℃≦Topr≦85℃
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “H” level
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “L” level
PWM "H" Level Voltage
(*13)
VPWMH
PWM "L" Level Voltage
(*13)
VPWML
CE "H" Current
CE "L" Current
ICEH
ICEL
Soft Start Time
tSS
Latch Time
tLAT
Short Protection
Threshold Voltage
VSHORT
Inductance Value
Allowed Inductor Current
L
IDC
When connected to external components,
(*6),
Voltage which oscillation
IOUT=1mA
(*13)
frequency becomes 2550kHz≦fOSC≦3450kHz
When connected to external components,
(*6)
IOUT=1mA , Voltage which oscillation
(*13)
frequency 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(T)
(*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
Test frequency =1MHz
ΔT=40℃
Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T)=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: Design value
*5: When temperature is high, a current of approximately 10μA (maximum) may leak.
*6: The CE/MODE pin of the XCL207 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: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series)
*13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series)
5/26
XCL205/XCL206/XCL207 Series
■ELECTRICAL CHARACTERISTICS (Continued)
●XCL205B123AR/XCL206B123AR/ XCL207B123AR, VOUT=1.2V, fOSC=3.0MHz, Ta=25℃
PARAMETER
SYMBOL
Output Voltage
VOUT
Operating Voltage Range
VIN
Maximum Output Current
IOUTMAX
UVLO Voltage
VUVLO
Supply Current (XCL205)
CONDITIONS
When connected to external components,
VIN=VCE=5.0V, IOUT=30mA
VIN=VOUT(T)+2.0V, VCE=1.0V
(*9)
When connected to external components
VCE=VIN,VOUT=0V,
(*1, *11)
Voltage which Lx pin holding “L” level
Supply Current (XCL206, XCL207)
Stand-by Current
IDD
VIN=VCE=5.0V, VOUT=VOUT(T)×1.1V
ISTB
Oscillation Frequency
fOSC
VIN=5.0V, VCE=0V, VOUT=VOUT(T)×1.1V
When connected to external components,
VIN =VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA
When connected to external components,
(*12)
VIN =VOUT(T)+2.0V, VCE = VIN , IOUT=1mA
(*12)
PFM Switching Current
PFM Duty Limit
(*12)
IPFM
DTYLIMIT_PFM
VCE=VIN=(C-1) IOUT=1mA
(*12)
Maximum Duty Cycle
DMAX
VIN=VCE=5.0V, VOUT=VOUT (T)×0.9V
Minimum Duty Cycle
DMIN
Efficiency
EFFI
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
RLｘH
RLｘH
RLｘL
RLｘL
ILeakH
ILIM
△VOUT/
(VOUT・△topr)
CE "H" Voltage
VCEH
CE "L" Voltage
VCEL
VIN=VCE=5.0V, VOUT=VOUT (T)×1.1V
When connected to external components,
VCE=VIN＝VOUT (T)+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
(*8)
VIN=VCE=5.0V, VOUT=VOUT (T)×0.9V
IOUT =30mA
-40℃≦Topr≦85℃
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “H” level
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “L” level
When connected to external components,
(*6),
IOUT=1mA
Voltage which oscillation
(*13)
frequency becomes 2550kHz≦fOSC≦3450kHz
When connected to external components,
(*6)
IOUT=1mA , Voltage which oscillation
(*13)
frequency 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(T)
(*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=5.0V, LX=5.0V, VCE=0V, VOUT=Open
Test frequency =1MHz
ΔT=40℃
PWM "H" Level Voltage
(*13)
VPWMH
PWM "L" Level Voltage
(*13)
VPWML
CE "H" Current
CE "L" Current
ICEH
ICEL
Soft Start Time
tSS
Latch Time
tLAT
Short Protection
Threshold Voltage
VSHORT
CL Discharge
Inductance Value
Allowed Inductor Current
RDCHG
L
IDC
MIN.
TYP.
MAX.
UNITS CIRCUIT
1.176
1.200
1.224
V
①
2.0
-
6.0
V
①
600
-
-
mA
①
1.00
1.40
1.78
V
③
μA
②
-
46
65
-
21
35
-
0
1.0
μA
②
2550
3000
3450
kHz
①
190
260
350
mA
⑩
-
200
300
%
①
100
-
-
%
③
-
-
0
%
③
-
82
-
%
①
900
0.35
0.42
0.45
0.52
0.01
1050
0.55
0.67
0.66
0.77
1.0
1350
Ω
Ω
Ω
Ω
μA
mA
④
④
⑨
⑥
-
±100
-
ppm/ ℃
①
0.65
-
VIN
V
③
VSS
-
0.25
V
③
-
-
VIN - 1.0
V
①
VIN 0.25
-
-
V
①
- 0.1
- 0.1
-
0.1
0.1
μA
μA
⑤
⑤
-
0.25
0.40
ms
①
1.0
-
20
ms
⑦
0.450
0.600
0.750
V
⑦
200
-
300
1.5
1000
450
-
Ω
μH
mA
⑧
Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T) =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: Design value
*5: When temperature is high, a current of approximately 10μA (maximum) may leak.
*6: The CE/MODE pin of the XCL207 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: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series)
*13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series)
6/26
XCL205/XCL206/XCL207
Series
■ELECTRICAL CHARACTERISTICS (Continued)
●XCL205 B183AR/XCL206 B183AR/ XCL207B183AR, VOUT=1.8V, fOSC=3.0MHz, Ta=25℃
PARAMETER
SYMBOL
Output Voltage
VOUT
Operating Voltage Range
VIN
Maximum Output Current
IOUTMAX
UVLO Voltage
VUVLO
Supply Current (XCL205)
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
Supply Current (XCL206, XCL207)
Stand-by Current
IDD
VIN=VCE=5.0V, VOUT=VOUT(T)×1.1V
ISTB
Oscillation Frequency
fOSC
VIN=5.0V, VCE=0V, VOUT=VOUT(T)×1.1V
When connected to external components,
VIN =VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA
When connected to external components,
(*12)
VIN =VOUT(T)+2.0V, VCE = VIN , IOUT=1mA
(*12)
PFM Switching Current
PFM Duty Limit
(*12)
IPFM
DTYLIMIT_PFM
VCE=VIN=(C-1) IOUT=1mA
(*12)
Maximum Duty Cycle
DMAX
VIN=VCE=5.0V, VOUT=VOUT (T)×0.9V
Minimum Duty Cycle
DMIN
VIN=VCE=5.0V, VOUT=VOUT (T)×1.1V
When connected to external components,
VCE=VIN＝VOUT (T)+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
(*8)
VIN=VCE=5.0V, VOUT=VOUT (T)×0.9V
IOUT =30mA
-40℃≦Topr≦85℃
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “H” level
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “L” level
When connected to external components,
(*6),
IOUT=1mA
Voltage which oscillation
(*13)
frequency becomes 2550kHz≦fOSC≦3450kHz
When connected to external components,
(*6)
IOUT=1mA , Voltage which oscillation
(*13)
frequency 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(T)
(*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=5.0V, LX=5.0V, VCE=0V, VOUT=Open
Test frequency =1MHz
ΔT=40℃
Efficiency
EFFI
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
RLｘH
RLｘH
RLｘL
RLｘL
ILeakH
ILIM
△VOUT /
(VOUT・△topr)
CE "H" Voltage
VCEH
CE "L" Voltage
VCEL
PWM "H" Level Voltage
(*13)
VPWMH
PWM "L" Level Voltage
(*13)
VPWML
CE "H" Current
CE "L" Current
ICEH
ICEL
Soft Start Time
tSS
Latch Time
tLAT
Short Protection
Threshold Voltage
VSHORT
CL Discharge
Inductance Value
Allowed Inductor Current
RDCHG
L
IDC
MIN.
TYP.
MAX.
UNITS CIRCUIT
1.764
1.800
1.836
V
①
2.0
-
6.0
V
①
600
-
-
mA
①
1.00
1.40
1.78
V
③
-
46
65
-
21
0
35
1.0
μA
②
μA
②
2550
3000
3450
kHz
①
170
220
270
mA
⑩
-
200
300
%
①
100
-
-
%
③
-
-
0
%
③
-
85
-
%
①
900
0.35
0.42
0.45
0.52
0.01
1050
0.55
0.67
0.66
0.77
1.0
1350
Ω
Ω
Ω
Ω
μA
mA
④
④
⑨
⑥
-
±100
-
ppm/ ℃
①
0.65
-
VIN
V
③
VSS
-
0.25
V
③
-
-
VIN - 1.0
V
①
VIN 0.25
-
-
V
①
- 0.1
- 0.1
-
0.1
0.1
μA
μA
⑤
⑤
-
0.32
0.50
ms
①
1.0
-
20
ms
⑦
0.675
0.900
1.125
V
⑦
200
-
300
1.5
1000
450
-
Ω
μH
mA
⑧
Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T) = 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: Design value
*5: When temperature is high, a current of approximately 10μA (maximum) may leak.
*6: The CE/MODE pin of the XCL207 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: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series)
*13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series)
7/26
XCL205/XCL206/XCL207 Series
■ELECTRICAL CHARACTERISTICS (Continued)
●XCL205C123AR/XCL206C123AR/ XCL207C123AR, VOUT=1.2V, fOSC=3.0MHz, Ta=25℃
PARAMETER
SYMBOL
Output Voltage
VOUT
Operating Voltage Range
VIN
Maximum Output Current
IOUTMAX
UVLO Voltage
VUVLO
Supply Current (XCL205)
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
IDD
VIN =VCE=5.0V, VOUT= VOUT(T)×1.1V
Stand-by Current
ISTB
Oscillation Frequency
fOSC
VIN =5.0V, VCE=0V, VOUT= VOUT(T)×1.1V
When connected to external components,
VIN =VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA
When connected to external components,
VIN =VOUT(T)+2.0V, VCE = VIN , IOUT=1mA
Supply Current (XCL206, XCL207)
(*12)
PFM Switching Current
PFM Duty Limit
(*12)
IPFM
DTYLIMIT_PFM
VCE= VIN =(C-1) IOUT=1mA
Maximum Duty Cycle
MAXDTY
VIN = VCE =5.0V, VOUT = VOUT (T)×0.9V
Minimum Duty Cycle
MINDTY
Efficiency
EFFI
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
RLｘH
RLｘH
RLｘL
RLｘL
ILeakH
ILIM
△VOUT/
(VOUT・△topr)
CE "H" Voltage
VCEH
CE "L" Voltage
VCEL
VIN = VCE =5.0V, VOUT = VOUT (T)×1.1V
When connected to external components,
VCE = VIN ＝ VOUT (T)+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
(*8)
VIN = VCE= 5.0V, VOUT = VOUT (T)×0.9V
IOUT =30mA
-40℃≦Topr≦85℃
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “H” level
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “L” level
When connected to external components,
(*6),
IOUT=1mA
Voltage which oscillation
(*13)
frequency becomes 2550kHz≦fOSC≦3450kHz
When connected to external components,
(*6)
IOUT=1mA , Voltage which oscillation
(*13)
frequency 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(T)
(*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 = 5.0V LX = 5.0V VCE = 0V VOUT = open
Test frequency=1MHz
ΔT=40℃
PWM "H" Level Voltage
(*13)
VPWMH
PWM "H" Level Voltage
(*13)
VPWML
CE "H" Current
CE "L" Current
ICEH
ICEL
Soft Start Time
tSS
Latch Time
tLAT
Short Protection
Threshold Voltage
VSHORT
CL Discharge
Inductance Value
Allowed Inductor Current
RDCHG
L
IDC
MIN.
TYP.
MAX.
1.176
1.200
1.224
V
①
2.0
-
6.0
V
①
600
-
-
mA
①
1.00
1.40
1.78
V
③
μA
②
-
UNITS CIRCUIT
46
65
21
35
-
0
1.0
μA
②
2550
3000
3450
kHz
①
190
260
350
mA
⑩
-
200
300
%
①
100
-
-
%
③
-
-
0
%
③
-
82
-
%
①
900
0.35
0.42
0.45
0.52
0.01
1050
0.55
0.67
0.66
0.77
1.0
1350
Ω
Ω
Ω
Ω
μA
mA
④
④
⑨
⑥
-
±100
-
ppm/ ℃
①
0.65
-
6.0
V
③
VSS
-
0.25
V
③
-
-
VIN - 1.0
V
①
VIN 0.25
-
-
V
①
- 0.1
- 0.1
-
0.1
0.1
μA
μA
⑤
⑤
0.5
0.9
2.5
ms
①
1.0
-
20
ms
⑦
0.450
0.600
0.750
V
⑦
200
-
300
1.5
1000
450
-
Ω
μH
mA
⑧
-
Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T) = 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: Design value
*5: When temperature is high, a current of approximately 10μA (maximum) may leak.
*6: The CE/MODE pin of the XCL207 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: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series)
*13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series)
8/26
XCL205/XCL206/XCL207
Series
■ELECTRICAL CHARACTERISTICS (Continued)
●XCL205C183AR/XCL206C183AR/ XCL207C183AR, VOUT=1.8V, fOSC=3.0MHz, Ta=25℃
PARAMETER
SYMBOL
Output Voltage
VOUT
Operating Voltage Range
VIN
Maximum Output Current
IOUTMAX
UVLO Voltage
VUVLO
Supply Current (XCL205)
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
IDD
VIN =VCE=5.0V, VOUT= VOUT(T)×1.1V
Stand-by Current
ISTB
Oscillation Frequency
fOSC
VIN =5.0V, VCE=0V, VOUT= VOUT(T)×1.1V
When connected to external components,
VIN =VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA
When connected to external components,
VIN =VOUT(T)+2.0V, VCE = VIN , IOUT=1mA
Supply Current (XCL206, XCL207)
(*12)
PFM Switching Current
PFM Duty Limit
(*12)
IPFM
DTYLIMIT_PFM
VCE= VIN =(C-1) IOUT=1mA
Maximum Duty Cycle
MAXDTY
VIN = VCE =5.0V, VOUT = VOUT (T)×0.9V
Minimum Duty Cycle
MINDTY
Efficiency
EFFI
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
RLｘH
RLｘH
RLｘL
RLｘL
ILeakH
ILIM
△VOUT/
(VOUT・△topr)
CE "H" Voltage
VCEH
CE "L" Voltage
VCEL
VIN = VCE =5.0V, VOUT = VOUT (T)×1.1V
When connected to external components,
VCE = VIN ＝ VOUT (T)+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
(*8)
VIN = VCE= 5.0V, VOUT = VOUT (T)×0.9V
IOUT =30mA
-40℃≦Topr≦85℃
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “H” level
VOUT=0V, Applied voltage to VCE,
(*11)
Voltage changes Lx to “L” level
When connected to external components,
(*6),
IOUT=1mA
Voltage which oscillation
(*13)
frequency becomes 2550kHz≦fOSC≦3450kHz
When connected to external components,
(*6)
IOUT=1mA , Voltage which oscillation
(*13)
frequency 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(T)
(*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 = 5.0V LX = 5.0V VCE = 0V VOUT = open
Test frequency=1MHz
ΔT=40℃
PWM "H" Level Voltage
(*13)
VPWMH
PWM "H" Level Voltage
(*13)
VPWML
CE "H" Current
CE "L" Current
ICEH
ICEL
Soft Start Time
tSS
Latch Time
tLAT
Short Protection
Threshold Voltage
VSHORT
CL Discharge
Inductance Value
Allowed Inductor Current
RDCHG
L
IDC
MIN.
TYP.
MAX.
UNITS CIRCUIT
1.764
1.800
1.836
V
①
2.0
-
6.0
V
①
600
-
-
mA
①
1.00
1.40
1.78
V
③
μA
②
-
46
65
-
21
35
-
0
1.0
μA
②
2550
3000
3450
kHz
①
170
220
270
mA
⑩
-
200
300
%
①
100
-
-
%
③
-
-
0
%
③
-
85
-
%
①
900
0.35
0.42
0.45
0.52
0.01
1050
0.55
0.67
0.66
0.77
1.0
1350
Ω
Ω
Ω
Ω
μA
mA
④
④
⑨
⑥
-
±100
-
ppm/ ℃
①
0.65
-
6.0
V
③
VSS
-
0.25
V
③
-
-
VIN - 1.0
V
①
VIN 0.25
-
-
V
①
- 0.1
- 0.1
-
0.1
0.1
μA
μA
⑤
⑤
0.5
0.9
2.5
ms
①
1.0
-
20
ms
⑦
0.675
0.900
1.125
V
⑦
200
-
300
1.5
1000
450
-
Ω
μH
mA
⑧
-
Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T) = 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: Design value
*5: When temperature is high, a current of approximately 10μA (maximum) may leak.
*6: The CE/MODE pin of the XCL207 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: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series)
*13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series)
9/26
XCL205/XCL206/XCL207 Series
■ELECTRICAL CHARACTERISTICS (Continued)
●PFM Switching Current (IPFM) by Nominal Output Voltage (XCL206/XCL207 Series)
NOMINAL OUTPUT VOLTAGE
MIN.
TYP.
MAX.
0.8V ≦ VOUT(T) ≦ 1.2V
190mA
260mA
350mA
1.2V ＜ VOUT(T) ＜1.8V
180mA
240mA
300mA
1.8V ≦ VOUT(T) ≦ 4.0V
170mA
220mA
270mA
●Input Voltage (VIN) for PFM Duty Limit (XCL206/XCL207 Series)
fOSC
3.0MHz
VIN Voltage (C-1)
VOUT(T)+1.0V
Minimum voltage (C-1) is 2.0V.
●Soft-Start Time, Nominal Output Voltage（XCL205B/XCL206B/XCL207B Series）
SERIES
fOSC
XCL205B/
NOMINAL OUTPUT VOLTAGE
MIN.
TYP.
MAX.
0.8V≦VOUT(T)<1.8V
-
0.25ms
0.40ms
1.8V≦VOUT(T) ≦4.0V
-
0.32ms
0.50ms
3.0MHz
XCL206B/XCL207B
■TYPICAL APPLICATION CIRCUIT
●XCL205/XCL206/XCL207 Series
L1
Lx
V IN
Vss
Vss
CIN
CL
V OUT
CE/MODE
L2
●External Components
CIN : 10V/4.7μF (Ceramic)
CL : 6.3V/10μF (Ceramic)
NOTE
The Inductor can be used only for this DC/DC converter.
Please do not use this inductor for the other reasons.
Please use B, X5R, and X7R grades in temperature characteristics for CIN and CL capacitors.
These grade ceramic capacitors minimize capacitance-loss as a function of voltage stress.
10/26
XCL205/XCL206/XCL207
Series
■OPERATIONAL DESCRIPTION
The XCL205/XCL/206/XCL207 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM
comparator, phase compensation circuit, output voltage adjustment resistors, P-channel MOSFET driver transistor, N-channel
MOSFET switching transistor for the synchronous switch, current limiter circuit, UVLO circuit with control IC, and an inductor.
(See the block diagram above.) Using the error amplifier, the voltage of the internal voltage reference source is compared with
the feedback voltage from the VOUT pin through split resistors, R1 and R2. Phase compensation is performed on the resulting
error amplifier output, to input a signal to the PWM comparator to determine the turn-on time during PWM operation. The PWM
comparator compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the ramp wave circuit,
and delivers the resulting output to the buffer driver circuit to cause the Lx pin to output a switching duty cycle. This process is
continuously performed to ensure stable output voltage. The current feedback circuit monitors the P-channel MOS driver
transistor current for each switching operation, and modulates the error amplifier output signal to provide multiple feedback
signals. This enables a stable feedback loop even when a low ESR capacitor such as a ceramic capacitor is used ensuring
stable output voltage.
<Reference Voltage Source>
The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter.
<Ramp Wave Circuit>
The ramp wave circuit determines switching frequency. The frequency is fixed internally 3.0MHz. Clock pulses generated in
this circuit are used to produce ramp waveforms needed for PWM operation, and to synchronize all the internal circuits.
<Error Amplifier>
The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the feedback
voltage divided by the internal split resistors, R1 and R2. When a feed back voltage is lower than the reference voltage, the
output voltage of the error amplifier is increased. The gain and frequency characteristics of the error amplifier output are fixed
internally to deliver an optimized signal to the mixer.
<Current Limit>
The current limiter circuit of the XCL205/XCL206/XCL207 series monitors the current flowing through the P-channel MOS driver
transistor connected to the Lx pin, and features a combination of the current limit mode and the operation suspension mode.
① When the driver current is greater than a specific level, the current limit function operates to turn off the pulses from the Lx pin
at any given timing.
② When the driver transistor is turned off, the limiter circuit is then released from the current limit detection state.
③ At the next pulse, the driver transistor is turned on. However, the transistor is immediately turned off in the case of an over
current state.
④ When the over current state is eliminated, the IC resumes its normal operation.
The IC waits for the over current state to end by repeating the steps ① through ③. If an over current state continues for a few
milliseconds and the above three steps are repeatedly performed, the IC performs the function of latching the OFF state of the
driver transistor, and goes into operation suspension state. Once the IC is in suspension state, operations can be resumed by
either turning the IC off via the CE/MODE pin, or by restoring power to the VIN pin. The suspension state does not mean a
complete shutdown, but a state in which pulse output is suspended; therefore, the internal circuitry remains in operation. The
current limit of the XCL205/XCL206/XCL207 series can be set at 1050mA at typical. Depending on the state of the PC Board,
latch time may become longer and latch operation may not work. In order to avoid the effect of noise, an input capacitor is
placed as close to the IC as possible.
Limit < # ms
Limit > # ms
Current Limit LEVEL
I Lx
0mA
V OUT
Vss
Lx
V CE
Restart
V IN
11/26
XCL205/XCL206/XCL207 Series
■OPERATIONAL DESCRIPTION (Continued)
<Short-Circuit Protection>
The short-circuit protection circuit monitors the internal R1 and R2 divider voltage from the VOUT pin (refer to FB point in the
block diagram shown in the previous page). In case where output is accidentally shorted to the Ground and when the FB
point voltage decreases less than half of the reference voltage (Vref) and a current more than the ILIM flows to the driver
transistor, the short-circuit protection quickly operates to turn off and to latch the driver transistor. In the latch state, the
operation can be resumed by either turning the IC off and on via the CE/MODE pin, or by restoring power supply to the VIN
pin.
When sharp load transient happens, a voltage drop at the VOUT is propagated to the FB point through CFB, as a result, short
circuit protection may operate in the voltage higher than 1/2 VOUT voltage.
<UVLO Circuit>
When the VIN pin voltage becomes 1.4V or lower, the P-channel output driver transistor is forced OFF to prevent false pulse
output caused by unstable operation of the internal circuitry. When the VIN pin voltage becomes 1.8V or higher, switching
operation takes place. By releasing the UVLO function, the IC performs the soft start function to initiate output startup operation.
The soft start function operates even when the VIN pin voltage falls momentarily below the UVLO operating voltage. The UVLO
circuit does not cause a complete shutdown of the IC, but causes pulse output to be suspended; therefore, the internal circuitry
remains in operation.
<PFM Switch Current>
In PFM control operation, until coil current reaches to a specified level (IPFM), the IC keeps the P-ch MOSFET on. In this case,
on-time (tON) that the P-ch MOSFET is kept on can be given by the following formula.
tON = L×IPFM / (VIN－VOUT)
→IPFM①
<PFM Duty Limit>
In the PFM control operation, the PFM Duty Limit (DTYLIMIT_PFM) is set to 200% (TYP.). Therefore, under the condition that the
duty increases (e.g. the condition that the step-down ratio is small), it’s possible for P-ch MOSFET to be turned off even when coil
→IPFM②
current doesn’t reach to IPFM.
Maximum IPFM Limit
tON
Lx
Lx
fOSC
IPFM
ILx
0mA
IPFM①
12/26
IPFM
ILx
0mA
IPFM②
XCL205/XCL206/XCL207
Series
■OPERATIONAL DESCRIPTION (Continued)
＜CL High Speed Discharge＞
The XCL205B(C)/ XCL206B(C)/ XCL207B(C) series can quickly discharge the electric charge at the output capacitor (CL) when a
low signal to the CE pin which enables a whole IC circuit put into OFF state, is inputted via the N-channel transistor located
between the LX pin and the VSS pin. When the IC is disabled, electric charge at the output capacitor (CL) is quickly discharged so
that it may avoid application malfunction. Discharge time of the output capacitor (CL) is set by the CL auto-discharge resistance
(R) and the output capacitor (CL). By setting time constant of a CL auto-discharge resistance value [R] and an output capacitor
value (CL) as τ(τ=C x R), discharge time of the output voltage after discharge via the N channel transistor is calculated by the
following formula.
V = VOUT(T) x e –t/τ or t=τln (VOUT(T) / V)
V : Output voltage after discharge
VOUT(T) : Output voltage
t: Discharge time,
τ: C x R
C= Capacitance of Output capacitor (CL)
R= CL auto-discharge resistance
Output Voltage Discharge Characteristics
RDCHG=300Ω(TYP.)
Output Voltage (Relative Value)
100 = Setting Voltage Value
100
CL=10uF
CL=20uF
CL=50uF
80
60
40
20
0
0
20
40
60
80
100
Discharge Time ｔ(ms)
13/26
XCL205/XCL206/XCL207 Series
■OPERATIONAL DESCRIPTION (Continued)
<CE/MODE Pin Function>
The operation of the XCL205/XCL206/ XCL207 series will enter into the shut down mode when a low level signal is input to the
CE/MODE pin. During the shutdown mode, the current consumption of the IC becomes 0μA (TYP.), with a state of high
impedance at the Lx pin and VOUT pin. The IC starts its operation by inputting a high level signal to the CE/MODE pin. The
input to the CE/MODE pin is a CMOS input and the sink current is 0μA (TYP.).
●XCL205/XCL206 series - Examples of how to use CE/MODE pin
V IN
V DD
V IN
V DD
(A)
SW_CE
SW_CE
R1
CE/MODE
CE/MODE
SELECTED
STATUS
ON
Stand-by
OFF
Operation
(B)
SW_CE
R2
SW_CE
< IC inside >
< IC inside >
（A）
SELECTED
STATUS
ON
Operation
OFF
Stand-by
（B）
●XCL207 series - Examples of how to use CE/MODE pin
V IN
V DD
V IN
V DD
(A)
SW_CE
SW_PWM/PFM
RM1
RM1
SW_CE
CE/MODE
RM2
CE/MODE
SELECTED
STATUS
PWM/PFM
ON
RM2
SW_PWM/PFM
SW_PWM/PFM
*
Automatic
Switching Control
SW_CE
OFF
ON
PWM Control
OFF
OFF
Stand-by
< IC inside >
< IC inside >
(B)
（A）
（B）
SW_CE
Intermediate voltage can be generated by RM1 and RM2. Please set the value
of each R1, R2, RM1, RM2 from
few hundreds kΩ to few hundreds MΩ. For switches, CPU open-drain I/O
port and transistor can be used.
SW_PWM/PFM
SELECTED
STATUS
ON
*
Stand-by
OFF
ON
PWM Control
OFF
OFF
PWM/PFM
Automatic
Switching Control
14/26
XCL205/XCL206/XCL207
Series
■OPERATIONAL DESCRIPTION (Continued)
<Soft Start>
The XCL205/XCL206/XCL207 series (A series and C series) provide 0.9ms (TYP). The XCL205B/XCL206B/XCL207B series
provide 0.32ms (TYP) however, when VOUT is less than 1.8V, provide 0.25ms (TYP.). Soft start time is defined as the time to
reach 90% of the output nominal voltage when the CE pin is turned on.
tSS
VCEH
0V
90% of setting voltage
VOUT
0V
■FUNCTION CHART
CE/MODE
VOLTAGE
LEVEL
H Level
(*1)
OPERATIONAL STATES
XCL205
XCL206
XCL207
Synchronous
Synchronous
Synchronous
PWM Fixed
PWM/PFM
PWM/PFM
Control
Automatic Switching
Automatic Switching
M Level
(*2)
━
━
L Level
(*2)
Stand-by
Stand-by
Synchronous
PWM Fixed Control
Stand-by
Note on CE/MODE pin voltage level range
(*1) H level: 0.65V < H level < 6V (for XCL205/XCL206)
H level: VIN – 0.25V < H level < VIN (for XCL207)
(*2) M level: 0.65V < M level < VIN - 1.0V (for XCL207)
(*3) L level: 0V < L level < 0.25V
15/26
XCL205/XCL206/XCL207 Series
■NOTE ON USE
1. The XCL205/XCL206/XCL207 series is designed for use with ceramic output capacitors. If, however, the potential
difference is too large between the input voltage and the output voltage, a ceramic capacitor may fail to absorb the resulting
high switching energy and oscillation could occur on the output. If the input-output potential difference is large, connect an
electrolytic capacitor in parallel to compensate for insufficient capacitance.
2. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly influenced by
external component selection, such as the coil inductance, capacitance values, and board layout of external components.
Once the design has been completed, verification with actual components should be done.
3. Depending on the input-output voltage differential, or load current, some pulses may be skipped, and the ripple voltage may
increase.
4. When the difference between VIN and VOUT is large in PWM control, very narrow pulses will be outputted, and there is the
possibility that some cycles may be skipped completely.
5. When the difference between VIN and VOUT is small, and the load current is heavy, very wide pulses will be outputted and
there is the possibility that some cycles may be skipped completely.
6. With the IC, the peak current of the coil is controlled by the current limit circuit. Since the peak current increases when
dropout voltage or load current is high, current limit starts operation, and this can lead to instability. When peak current
becomes high, please adjust the coil inductance value and fully check the circuit operation. In addition, please calculate
the peak current according to the following formula:
Ipk = (VIN - VOUT) x OnDuty / (2 x L x fOSC) + IOUT
L: Coil Inductance Value
fOSC: Oscillation Frequency
7. When the peak current which exceeds limit current flows within the specified time, the built-in P-ch driver transistor turns off.
During the time until it detects limit current and before the built-in transistor can be turned off, the current for limit current
flows; therefore, care must be taken when selecting the rating for the external components such as a coil.
8. When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.
9. Depending on the state of the PC Board, latch time may become longer and latch operation may not work. In order to avoid
the effect of noise, the board should be laid out so that input capacitors are placed as close to the IC as possible.
10. Use of the IC at voltages below the recommended voltage range may lead to instability.
11. This IC should be used within the stated absolute maximum ratings in order to prevent damage to the device.
12. When the IC is used in high temperature, output voltage may increase up to input voltage level at no load because of the
leak current of the driver transistor.
13. The current limit is set to 1350mA (MAX.) at typical. However, the current of 1350mA or more may flow. In case that the
current limit functions while the VOUT pin is shorted to the GND pin, when P-ch MOSFET is ON, the potential difference for
input voltage will occur at both ends of a coil. For this, the time rate of coil current becomes large. By contrast, when
N-ch MOSFET is ON, there is almost no potential difference at both ends of the coil since the VOUT pin is shorted to the
GND pin. Consequently, the time rate of coil current becomes quite small. According to the repetition of this operation,
and the delay time of the circuit, coil current will be converged on a certain current value, exceeding the amount of current,
which is supposed to be limited originally. Even in this case, however, after the over current state continues for several
ms, the circuit will be latched. A coil should be used within the stated absolute maximum rating in order to prevent
damage to the device.
①Current flows into P-ch MOSFET to reach the current limit (ILIM).
②The current of ILIM or more flows since the delay time of the circuit occurs during from the detection of the current limit to
OFF of P-ch MOSFET.
③Because of no potential difference at both ends of the coil, the time rate of coil current becomes quite small.
④Lx oscillates very narrow pulses by the current limit for several ms.
⑤The circuit is latched, stopping its operation.
②
①
③
④
Limit > # ms
Duty
Lx
ILIM
ILx
16/26
⑤
XCL205/XCL206/XCL207
Series
■NOTE ON USE (Continued)
14. In order to stabilize VIN voltage level and oscillation frequency, we recommend that a by-pass capacitor (CIN) be
connected as close as possible to the VIN & VSS pins.
15. High step-down ratio and very light load may lead an intermittent oscillation when PWM mode.
16. Please use within the power dissipation range below. Please also note that the power dissipation may changed by test
conditions, the power dissipation figure shown is PCB mounted.
Maximum Power Disspation Pd (W)
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
25
50
75
100
Operating Temperature Ta (℃)
the power loss of micro DC/DC according to the following formula:
power loss = VOUT×IOUT×((100/EFFI) – 1)
(W)
VOUT：Output Voltage (V)
IOUT ：Output Current (A)
EFFI：Conversion Efficiency (%)
40.0
Measurement Condition (Reference data)
Condition: Mount on a board
Ambient: Natural convection
40.0
.
2.5
Material:
Thickness:
Through-hole:
Lead (Pb) free
2
Dimensions 40 x 40 mm (1600 mm in one side)
Copper (Cu) traces occupy 50% of the board area
In top and back faces
Package heat-sink is tied to the copper traces
Glass Epoxy (FR-4)
1.6mm
4 x 0.8 Diameter
28.9
Soldering:
Board:
28.9
2.54
.
1.4
Evaluation Board (Unit: mm)
17/26
XCL205/XCL206/XCL207 Series
■NOTE ON USE (Continued)
●Instructions of pattern layouts
1. In order to stabilize VIN voltage level, we recommend that a by-pass capacitor (CIN) be connected as close as possible to the
VIN (No.6) & VSS (No.5) pins.
2. Please mount each external component as close to the IC as possible.
3. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit
impedance.
4. Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused by high ground currents
at the time of switching may result in instability of the IC.
5. This series’ internal driver transistors bring on heat because of the output current and ON resistance of driver transistors.
6. Please connect Lx (No.1) pin and L1 (No.7) pin by wiring on the PCB.
7. Please connect VOUT (No.3) pin and L2 (No.8) pin by wiring on the PCB.
VOUT
GND
VOUT
GND
CE
LX
GND
VIN
CL
LX
CE
IC
CIN
GND
VIN
FRONT
VOUT
BACK (Flip Horizontal)
GND
CL
LX
CE
IC
CIN
GND
VIN
FRONT (PCB mounted)
18/26
XCL205/XCL206/XCL207
Series
■TEST CIRCUITS
Wave Form Measure Point
< Circuit No.1 >
L1
A
VIN
A
Lx
CE/
MODE
CIN
V
VOUT
VSS
< Circuit No.2 >
CL
L2
L1
Lx
VIN
1μF
CE/
MODE
VOUT
VSS
L2
※ External Components
CIN : 4.7μF(ceramic)
CL : 10μF(ceramic)
< Circuit No.3 >
< Circuit No.4 >
Wave Form Measure Point
L1
VIN
Lx
CE/
MODE
1μF
Rpulldown
200Ω
VOUT
VSS
L1
Lx
VIN
1μF
CE/
MODE
L2
V
VOUT
VSS
100mA
L2
ON resistance = (VIN-VLx)/100mA
< Circuit No.5 >
< Circuit No.6 >
ILeakH
L1
VIN
Wave Form Measure Point
L1
Lx
A
VIN
Lx
1μF
ICEH
A
ILeakL
CE/
MODE
1μF
VOUT
VSS
CE/
MODE
L2
VSS
V
VOUT
L2
ILIM
ICEL
< Circuit No.8 >
< Circuit No.7 >
VIN
1μF
L1
Lx
VIN
Ilat
CE/
MODE
VOUT
VSS
ILx
Wave Form Measure Point
L1
L2
CE/
MODE
1uF
Wave Form Measure Point
L1
A
CIN
L2
< Circuit No.10 >
VIN
Lx
CE/
MODE
VOUT
VSS
A
CIN
A
VOUT
VSS
Rpulldown
1Ω
< Circuit No.9 >
Lx
L
L1
VIN
Lx
CE/
MODE
L2
VOUT
VSS
L2
CL
V
*External
Components
※ External
Components
: 1.5uH(選別品)
L L: 1.5μH
: 4.7μF(ceramic)
CINCIN: 4.7μF(ceramic)
: 10μF(ceramic)
CL CL: 10μF(ceramic)
19/26
XCL205/XCL206/XCL207 Series
■TYPICAL PERFORMANCE CHARACTERISTICS
(1) Efficiency vs. Output Current
(2) Output Voltage vs. Output Current
XCL205A183AR/XCL206A183AR/XCL207A183AR
100
XCL206/XCL207(PWM/PFM)
2.0
Output Voltage:V OUT(V)
80
Efficency:EFFI(%)
XCL205A183AR/XCL206A183AR/XCL207A183AR
2.1
60
2.4V
3.6V
VIN= 4.2V
40
XCL205/XCL207
(PWM)
20
XCL/206/XCL207
(PWM/PFM)
VIN＝4.2V,3.6V,2.4V
1.9
1.8
1.7
XCL205/XCL207
(PWM)
1.6
1.5
0
0.1
1
10
100
0.1
1000
1
(3) Ripple Voltage vs. Output Current
XCL205A183AR/XCL206A183AR/XCL207A183AR
XCL205A183AR/XCL206A183AR/XCL207A183AR
Oscillation Frequency : fosc(MHz)
3.5
80
Ripple Voltage:Vr(mV)
1000
(4) Oscillation Frequency vs. Ambient Temperature
100
60
XCL206/XCL207
(PWM/PFM)
VIN＝4.2V
3.6V
2.4V
XCL205/XCL207
(PWM)
VIN＝4.2V,3.6V,2.4V
40
20
0
0.1
1
10
100
3.4
3.3
3.2
3.1
VIN=3.6V
3.0
2.9
2.8
2.7
2.6
2.5
-50
1000
-25
Output Current:IOUT (mA)
25
50
75
100
(6) Output Voltage vs. Ambient Temperature
XCL205A183AR/XCL206A183AR/XCL207A183AR
XCL206A183AR/XCL207A183AR
2.1
40
VIN=6.0V
35
2.0
Output Voltage : V OUT (V)
4.0V
30
25
20
15
2.0V
10
5
0
-50
0
Ambient Temperature: Ta (℃)
(5) Supply Current vs. Ambient Temperature
Supply Current : IDD (μA)
100
Output Current:IOUT (mA)
Output Current:IOUT (mA)
1.9
VIN=3.6V
1.8
1.7
1.6
1.5
-25
0
25
50
Ambient Temperature: Ta (℃)
20/26
10
75
100
-50
-25
0
25
50
Ambient Temperature: Ta (℃)
75
100
XCL205/XCL206/XCL207
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(7) UVLO Voltage vs. Ambient Temperature
(8) CE "H" Voltage vs. Ambient Temperature
XCL205A183AR/XCL206A183AR/XCL207A183AR
XCL205A183AR/XCL206A183AR/XCL207A183AR
1.0
1.8
0.9
CE "H" Voltage : VCEH (V)
UVLO Voltage : UVLO (V)
CE=VIN
1.5
1.2
0.9
0.6
0.3
0.8
VIN=5.0V
0.7
3.6V
0.6
0.5
0.4
0.3
2.4V
0.2
0.1
0.0
0.0
-50
-25
0
25
50
75
-50
100
-25
Ambient Temperature: Ta ( ℃)
0
25
50
75
100
Ambient Temperature: Ta (℃)
(9) CE "L" Voltage vs. Ambient Temperature
(10) Soft Start Time vs. Ambient Temperature
XCL205A183AR/XCL206A183AR/XCL207A183AR
XCL205A183AR/XCL206A183AR/XCL207A183AR
1.0
5.0
0.8
Soft Start Time : tss (ms)
CE "L" Voltage : VCEL (V)
0.9
VIN=5.0V
0.7
3.6V
0.6
0.5
0.4
0.3
2.4V
0.2
4.0
3.0
2.0
VIN=3.6V
1.0
0.1
0.0
0.0
-50
-25
0
25
50
75
-50
100
-25
Ambient Temperature: Ta ( ℃)
25
50
75
100
Ambient Temperature: Ta (℃)
(11) "Pch / Nch" Driver on Resistance vs. Input Voltage
(12) Rise Wave Form
XCL205B333AR/XCL206B333AR/XCL207B333AR
XCL205A183AR/XCL206A183AR/XCL207A183AR
Lx SW ON Resistance:RLxH,RLxL (Ω)
0
1.0
0.9
XCL206B333
VIN=5.0V
IOUT=1.0mA
0.8
0.7
Nch on Resistance
0.6
0.5
2ch
0.4
VOUT
0.3
Pch on Resistance
0.2
0.1
1ch
CE:0.0V⇒1.0V
0.0
0
1
2
3
4
Input Voltage : VIN (V)
5
6
1ch:1V/div
2ch:1V/div
Time:
100μs /div
Time:100μs/div
21/26
XCL205/XCL206/XCL207 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(14) CL Discharge Resistance vs. Ambient Temperature
(13) Soft-Start Time vs. Ambient Temperature
XCL205B333AR/XCL206B333AR/XCL207B333AR
XCL205B333AR/XCL206B333AR/XCL207B333AR
600
400
CL Discharge Resistance: (Ω)
Soft Start Time : tss (μs)
500
VIN=5.0V
IOUT=1.0mA
300
200
100
0
-50
-25
0
25
50
75
100
XCL207B333
500
400
2.0V
VIN=6.0V
300
200
100
-50
4.0V
-25
0
25
50
75
Ambient Temperature: Ta ( ℃)
Ambient Temperature: Ta (℃)
(15) Load Transient Response
MODE：PWM/PFM Automatic Switching Control
XCL206A183AR/XCL207A183AR
XCL206A183AR/XCL207A183AR
VIN=3.6V,VOUT=1.8V
VIN=3.6V,VOUT=1.8V
IOUT=1mA ⇒ 300mA
IOUT=1mA ⇒ 100mA
1ch
1ch
VOUT
VOUT
2ch
2ch
1ch:100mA/div 2ch:50mV/div
1ch:100mA/div 2ch:50mV/div
Time:100μs/div
Time: 100μs /div
Time:100μs/div
Time:
100μs /div
XCL206A183AR/XCL207A183AR
XCL206A183AR/XCL207A183AR
VIN=3.6V,VOUT=1.8V
VIN=3.6V,VOUT=1.8V
IOUT=300mA ⇒ 1mA
IOUT=100mA ⇒ 1mA
1ch
1ch
2ch
2ch
VOUT
VOUT
1ch:100mA/div 2ch:50mV/div
1ch:100mA/div 2ch:50mV/div
Time:100μs/div
Time:
100μs /div
22/26
Time:100μs/div
Time: 100μs /div
100
XCL205/XCL206/XCL207
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(15) Load Transient Response (Continued)
MODE：PWM Control
XCL205A183AR/XCL207A183AR
XCL205A183AR/XCL207A183AR
VIN=3.6V,VOUT=1.8V
VIN=3.6V,VOUT=1.8V
IOUT=1mA ⇒ 100mA
IOUT=1mA ⇒ 300mA
1ch
1ch
2ch
2ch
1ch:100mA/div 2ch:50mV/div
1ch:100mA/div 2ch:50mV/div
Time:100μs/div
Time:
100μs /div
Time:100μs/div
Time:
100μs /div
XCL205A183AR/XCL207A183AR
XCL205A183AR/XCL207A183AR
VIN=3.6V,VOUT=1.8V
VIN=3.6V,VOUT=1.8V
1ch
IOUT=300mA ⇒ 1mA
IOUT=100mA ⇒ 1mA
1ch
2ch
2ch
1ch:100mA/div 2ch:50mV/div
Time:100μs/div
Time:
100μs /div
1ch:100mA/div 2ch:50mV/div
Time:100μs/div
Time: 100μs /div
23/26
XCL205/XCL206/XCL207 Series
■PACKAGING INFORMATION
●CL-2025
■External Lead
●Reference Pattern Layout
24/26
●Reference Metal Mask Design
XCL205/XCL206/XCL207
Series
■MARKING RULE
●CL-2025
① represents products series
MARK
PRODUCT SERIES
1
①
②
③
⑤
3
④
2
6
5
4
4
C
K
5
D
L
6
E
M
XCL205A*****-G
XCL205B*****-G
XCL205C*****-G
XCL206A*****-G
XCL206B*****-G
XCL206C*****-G
XCL207A*****-G
XCL207B*****-G
XCL207C*****-G
② represents type of DC/DC converters
OUTPUT VOLTAGE (V)
MARK
OCSILLATION FREQUENCY=3.0MHz
(XCL20****3**-G)
0.x
1.x
2.x
3.x
4.x
F
H
K
L
M
③ represents the decimal part of output voltage
OUTPUT VOLTAGE (V)
MARK
PRODUCT SERIES
X.0
X.05
X.1
X.15
X.2
X.25
X.3
X.35
X.4
X.45
X.5
X.55
X.6
X.65
X.7
X.75
X.8
X.85
X.9
X.95
0
A
1
B
2
C
3
D
4
E
5
F
6
H
7
K
8
L
9
M
XCL20***0***-G
XCL20***A***-G
XCL20***1***-G
XCL20***B***-G
XCL20***2***-G
XCL20***C***-G
XCL20***3***-G
XCL20***D***-G
XCL20***4***-G
XCL20***E***-G
XCL20***5***-G
XCL20***F***-G
XCL20***6***-G
XCL20***H***-G
XCL20***7***-G
XCL20***K***-G
XCL20***8***-G
XCL20***L***-G
XCL20***9***-G
XCL20***M***-G
④,⑤ represents production lot number
01～09、0A～0Z、11～9Z、A1～A9、AA～Z9、ZA～ZZ in order.
(G, I, J, O, Q, W excluded)
Note: No character inversion used.
25/26
XCL205/XCL206/XCL207 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.
26/26