XCL221/XCL222 Series is Not Recommended for New Designs.
XCL221/XCL222 Series
ETR28008-003
HiSAT-COT ® Control 0.5A Inductor Built-in Step-Down “micro DC/DC” Converters
☆Green Operation Compatible
■GENERAL DESCRIPTION
The XCL221/XCL222 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a
control IC in one tiny package (2.0mm×2.5mm, h=1.0mm). An internal coil simplifies the circuit and enables minimization of
noise and other operational trouble due to the circuit wiring.
A wide operating voltage range of 2.5V to 5.5V enables support for applications that require an internally fixed output
voltage (0.8V to 3.6V). The XCL221/XCL222 series uses synchronous rectification at an operating frequency of 1.2MHz.
The XCL221/XCL222 series uses HiSAT-COT (*) synchronous rectification. HiSAT-COT+PWM control (XCL221) or HiSATCOT+automatic PWM/PFM switching control (XCL222) can be selected.
The series have a high speed soft-start as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO function, the
internal P-channel driver transistor is forced OFF when input voltage becomes 2.0V or lower. When CE=Low, the integrated
CL discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge
switch located between the LX and PGND pins. The power consumption will be less than 1.0μA.
(*)
HiSAT-COT is a proprietary high-speed transient response technology for DC/DC converter which was developed by Torex.
It is Ideal for the LSI's that require high precision and high stability power supply voltage.
■APPLICATIONS
■FEATURES
●Wearable Device
●Bluetooth Module
●SSD(Solid State Drive)
●Mobile phone
●Digital still camera
●Portable game devices
Input Voltage
Output Voltage
Oscillation Frequency
Output Current
Efficiency
Control Methods
Circuit Protection
Functions
Output Capacitor
: 2.5V ~ 5.5V
: 0.8V ~ 3.6V (±2.0%)
: 1.2MHz
: 500mA
: 93% (VIN=5.0V, VOUT=3.3V/200mA)
: HiSAT-COT
100% Duty Cycle
PWM (XCL221)
PWM/PFM (XCL222)
: Thermal Shut Down
Current Limit Circuit (Drop)
Short Circuit Protection (Latch)
: Soft-start Circuit Built-in
UVLO
CL Discharge
: Low ESR Ceramic Capacitor
Operating Ambient Temperature : -40℃ ~ 105℃
Package
: CL-2025-02
Environmental Friendly
: EU RoHS Compliant, Pb Free
■TYPICAL APPLICATION CIRCUIT
■ TYPICAL PERFORMANCE
CHARACTERISTICS
XCL222B181ER-G (VOUT=1.8V)
7
1 Lx
VIN 6
2 AGND
0.5A
CL
10μF
PGND 5
3 VOUT
CIN
4.7μF
CE 4
8
1/19
XCL221/XCL222 Series is
Not Recommended for New Designs.
XCL221/XCL222 Series
■BLOCK DIAGRAM
L1
L2
Inductor
Short
Protection
VOUT
CFB
R1
High Side
Current Limit
Phase
Compensation
R2
Error
Amp.
AGND
Comparator
S
Q
Synch
Buffer
Drive
Logic
R
Vref with
Soft Start
CE Control Logic,
UVLO
Thermal Shutdown
CE
VIN
Minimum
On Time
Generator
Lx
VIN
VOUT
PGND
PWM/PFM
Selector
* The XCL221 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.
The XCL222 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at “PWM/PFM automatic
switching” internally.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
■PRODUCT CLASSIFICATION
●Ordering Information
XCL221①②③④⑤⑥-⑦
XCL222①②③④⑤⑥-⑦
DESIGNATOR
Type
①
(*1)
PWM
PWM/PFM Automatic switching control
ITEM
SYMBOL
B
②③
Output Voltage
08 ~ 36
④
Oscillation Frequency
1
⑤⑥-⑦(*1)
Package (Order Unit)
ER-G
DESCRIPTION
Refer to Selection Guide
Output Voltage options
e.g.)1.2V → ②=1, ③=2
1.25V → ②=1, ③=C
0.05V Increments:
0.05=A,0.15=B,0.25=C,0.35=D,0.45=E,0.55=F,0.65=H,
0.75=K,0.85=L,0.95=M
1.2MHz
CL-2025-02 (3,000pcs/Reel)
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
●Selection Guide
TYPE
OUTPUT
VOLTAGE
CL AUTODISCHARGE
LATCH or
SHORT
PROTECTION
UVLO
CHIP
ENABLE
CURRENT
LIMIT
SOFTSTART
THERMAL
SHUTDOWN
B
Fixed
Yes
Yes
Yes
Yes
Yes
Fixed
Yes
2/19
XCL221/XCL222 Series is Not Recommended for New Designs.
XCL221/XCL222
Series
■PIN CONFIGURATION
L1
7
VIN
6
1
Lx
PGND
5
2
AGND
CE
4
3
VOUT
* It should be connected the 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.
* Please refer to pattern layout page for the connecting to PCB.
8
L2
CL-2025-02
(BOTTOM VIEW)
■PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTIONS
1
2
3
4
5
6
7
8
Lx
AGND
VOUT
CE
PGND
VIN
L1
L2
Switching Output
Analog Ground
Fixed Output Voltage PIN
Chip Enable
Power Ground
Power Input
Inductor Electrodes
Inductor Electrodes
■FUNCTION TABLE
PIN NAME
SIGNAL
STATUS
Low
Stand-by
High
Active
CE
* Please do not leave the CE pin open.
■ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNITS
V
VIN Pin Voltage
VIN
-0.3 ~ 6.2
LX Pin Voltage
VLx
-0.3 ~ VIN + 0.3 or 6.2 (*1)
V
VOUT Pin Voltage
Vout
-0.3 ~ VIN + 0.3 or 4.0 (*2)
V
CE Pin Voltage
VCE
-0.3 ~ 6.2
V
Power Dissipation (Ta=25℃)
Pd
1000 (40mm x 40mm Standard board ) (*3)
mW
Operating Ambient Temperature
Topr
-40 ~ 105
℃
Storage Temperature
Tstg
-55 ~ 125
℃
All voltages are described based on the GND (AGND and PGND) pin.
(*1)
The maximum value should be either VIN+0.3V or +6.2V in the lowest voltage
(*2)
The maximum value should be either VIN+0.3V or +4.0V in the lowest voltage
(*3)
The power dissipation figure shown is PCB mounted and is for reference only.
Please refer to PACKAGING INFORMATION for the mounting condition.
3/19
XCL221/XCL222 Series
XCL221/XCL222 Series is
Not Recommended for New Designs.
■ELECTRICAL CHARACTERISTICS
Ta=25℃
●XCL221Bxx1ER-G/XCL222Bxx1ER-G
PARAMETER
SYMBOL
CONDITIONS
When connected to external components,
IOUT =30mA
MIN.
TYP.
MAX.
UNITS
CIRCUIT
V
①
2.5
-
5.5
V
①
Output Voltage
VOUT
Operating Voltage Range
VIN
Maximum Output Current
IOUTMAX
When connected to external components,
VIN =
500
-
-
mA
①
UVLO Voltage (*2)
VUVLO
Vout=0.6V,
Voltage which Lx pin holding ”L” level (*6)
1.35
2.0
2.48
V
③
Quiescent Current
(XCL222)
Iq
VOUT =VOUT(E) ×1.1
-
15
25
μA
②
Quiescent Current
(XCL221)
Iq
VOUT =VOUT(E) ×1.1
-
250
450
μA
②
Stand-by Current
ISTB
VCE =0V
-
0.0
1.0
μA
②
Minimum ON time (*2)
tONmin
ns
①
Thermal Shutdown
TTSD
-
150
-
℃
①
Thermal shutdown
Hysteresis
THYS
-
30
-
℃
①
LxSW ”H” ON
Resistance
RLXH
VOUT=0.6V, ILX=100mA (*3)
-
0.24
0.37
Ω
④
LxSW ”L” ON
Resistance (*4)
RLXL
VOUT=VOUT(T) × 1.1, ILX=100mA (*3)
-
0.16
0.30
Ω
④
LxSW ”H” Leakage
Current
ILeakH
VIN=5.5V, VCE=0V, VOUT=0V, VLX=5.5V
-
0.0
30.0
μA
⑤
ILeakL
VIN=5.5V, VCE=0V, VOUT=0V, VLX=0V
-
0.0
1.0
μA
⑤
ILIMH
VOUT=0.6V, ILx until Lx pin oscillates
1.3
1.5
2.5
A
⑥
-
±100
-
ppm/℃
①
LxSW ”L” Leakage
Current
Current Limit (*5)
When connected to external components,
VIN =VCE=, IOUT=1mA
Output Voltage
Temperature
Characteristics
ΔVOUT/
(VOUT・Δtopr)
CE ”H” Voltage
VCEH
VOUT=0.6V, Applied voltage to VCE,
Voltage changes Lx to “H” level (*6)
1.4
-
5.5
V
③
CE ”L” Voltage
VCEL
VFB=0.6V, Applied voltage to VCE,
Voltage changes Lx to “L” level (*6)
AGND
-
0.3
V
③
CE ”H” Current
ICEH
VIN=5.5V, VCE=5.5V, VOUT=0V
-0.1
-
0.1
μA
⑤
CE ”L” Current
ICEL
VIN=5.5V, VCE=0V, VOUT=0V
-0.1
-
0.1
μA
⑤
Soft-start Time
tSS
0.10
0.30
0.50
ms
③
0.17
0.27
0.37
V
③
50
-
210
4.7
300
-
Ω
μH
⑦
-
700
-
mA
-
Short Protection
Threshold Voltage
VSHORT
CL Discharge
Inductance
RDCHG
L
Inductor Rated Current
IDC
IOUT=30mA
-40℃≦Topr≦105℃
VCE=0V→5.0V, VOUT=VOUT(T)V × 0.9
After "H" is fed to CE, the time by
when clocks are generated at Lx pin.
Sweeping VOUT, VOUT voltage which Lx
becomes “L” level (*6)
VCE=0V, VOUT=4.0V
Test Freq.=1MHz
ΔT=+40deg
Unless otherwise stated, VIN=5.0V, VCE=5.0V, VOUT(T)=Nominal Voltage
NOTE:
(*1)
When the difference between the input and the output is small, 100% duty might come up and internal control circuits keep P-ch driver
turning on even though the output current is not so large.
If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.
(*2)
Including UVLO detect voltage, hysteresis operating voltage range for UVLO release voltage.
(*3)
RLXH=(VIN - Lx pin measurement voltage) / 100mA, RLXL=Lx pin measurement voltage / 100mA
(*4)
Design value for the XCL222 series
(*5)
Current limit denotes the level of detection at peak of coil current.
(*6)
"H"=VIN～VIN - 1.2V, "L"=- 0.1V～+ 0.1V
4/19
-
XCL221/XCL222
XCL221/XCL222 Series is Not Recommended for New Designs.
Series
■ELECTRICAL CHARACTERISTICS (Continued)
●SPEC Table (VOUT, tONmin)
NOMINAL
OUTPUT
VOLTAGE
VOUT
VOUT(T)
MIN.
TYP.
MAX.
VIN
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
2.10
2.15
2.20
0.784
0.833
0.882
0.931
0.980
1.029
1.078
1.127
1.176
1.225
1.274
1.323
1.372
1.421
1.470
1.519
1.568
1.617
1.666
1.715
1.764
1.813
1.862
1.911
1.960
2.009
2.058
2.107
2.156
0.800
0.850
0.900
0.950
1.000
1.050
1.100
1.150
1.200
1.250
1.300
1.350
1.400
1.450
1.500
1.550
1.600
1.650
1.700
1.750
1.800
1.850
1.900
1.950
2.000
2.050
2.100
2.150
2.200
0.816
0.867
0.918
0.969
1.020
1.071
1.122
1.173
1.224
1.275
1.326
1.377
1.428
1.479
1.530
1.581
1.632
1.683
1.734
1.785
1.836
1.887
1.938
1.989
2.040
2.091
2.142
2.193
2.244
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.50
2.58
2.67
2.75
2.83
2.92
3.00
3.08
3.17
3.25
3.33
3.42
3.50
3.58
3.67
tONmin
fOSC=1.2MHz
MIN.
TYP.
MAX.
187
198
210
222
233
245
257
268
280
292
303
315
327
338
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
267
283
300
317
333
350
367
383
400
417
433
450
467
483
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
347
368
390
412
433
455
477
498
520
542
563
585
607
628
650
650
650
650
650
650
650
650
650
650
650
650
650
650
650
NOMINAL
OUTPUT
VOLTAGE
VOUT
VOUT(T)
MIN.
TYP.
MAX.
VIN
2.25
2.30
2.35
2.40
2.45
2.50
2.55
2.60
2.65
2.70
2.75
2.80
2.85
2.90
2.95
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
2.205
2.254
2.303
2.352
2.401
2.450
2.499
2.548
2.597
2.646
2.695
2.744
2.793
2.842
2.891
2.940
2.989
3.038
3.087
3.136
3.185
3.234
3.283
3.332
3.381
3.430
3.479
3.528
2.250
2.300
2.350
2.400
2.450
2.500
2.550
2.600
2.650
2.700
2.750
2.800
2.850
2.900
2.950
3.000
3.050
3.100
3.150
3.200
3.250
3.300
3.350
3.400
3.450
3.500
3.550
3.600
2.295
2.346
2.397
2.448
2.499
2.550
2.601
2.652
2.703
2.754
2.805
2.856
2.907
2.958
3.009
3.060
3.111
3.162
3.213
3.264
3.315
3.366
3.417
3.468
3.519
3.570
3.621
3.672
3.75
3.83
3.92
4.00
4.08
4.17
4.25
4.33
4.42
4.50
4.58
4.67
4.75
4.83
4.92
5.00
5.08
5.17
5.25
5.33
5.42
5.50
5.50
5.50
5.50
5.50
5.50
5.50
tONmin
fOSC=1.2MHz
MIN.
TYP.
MAX.
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
355
361
366
371
377
382
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
508
515
523
530
538
545
650
650
650
650
650
650
650
650
650
650
650
650
650
650
650
650
650
650
650
650
650
650
660
670
680
689
699
709
■TYPICAL CIRCUIT
7
1 Lx
VIN 6
2 AGND
0.5A
CL
10μF
VALUE
PGND 5
3 VOUT
CIN
4.7μF
CIN
10V/4.7μF
CE 4
8
NOTE:
CL
(*1))Use
10V/10μF
(*1)
PRODUCT NUMBER
LMK105BBJ475MVLF(Taiyo Yuden)
LMK107BJ475KA (TaiyoYuden)
C1608X5R1A475K (TDK)
C2012X7R1A475M(TDK)
LMK105CBJ106MVLF(Taiyo Yuden)
LMK107BBJ106MALT (TaiyoYuden)
C1608X5R1A106K (TDK)
C2012X7R1A106M(TDK)
CL = 20uF or more when VIN-VOUT (T)
< Circuit No.② >
Wave Form Measure Point
L
RL
V
CL
L2
L1
L2
L1
VOUT
Lx
VOUT
Lx
AGND
VIN
CE
A
AGND
CIN
PGND
VIN
CE
PGND
A
1μF
※External Components
L：4.7μH(Selected goods)
CIN：10μF(Ceramic)
CL:10μF(Ceramic)
< Circuit No.③ >
< Circuit No.④ >
Wave Form Measure Point
L2
L1
L2
L1
VOUT
Lx
VOUT
Lx
AGND
VIN
AGND
VIN
CE
PGND
1μF
RPulldown
200Ω
CE
1μF
V
ILX
PGND
RLXH=(VIN-VL)/ILX
RLXL=VLX /ILX
< Circuit No.⑥ >
< Circuit No.⑤ >
Wave Form Measure Point
L2
L1
L2
L1
VOUT
Lx
AGND
VIN
ILeakH
VOUT
ICEH
A
AGND
Lx
VIN
CE
PGND
L2
L1
VOUT
Lx
AGND
VIN
A
ILeakL
1μF
CE
ICEL
< Circuit No.⑦ >
IVOUT
A
1μF
CE
6/19
PGND
PGND
1μF
ILIMH
V
XCL221/XCL222
XCL221/XCL222 Series is Not Recommended for New Designs.
Series
■OPERATIONAL EXPLANATION
The XCL221/XCL222 series consists of a reference voltage source, error amplifier, comparator, phase compensation,
minimum on time generation circuit, output voltage adjustment resistors, P-channel MOS driver transistor, N-channel MOS
switching transistor for the synchronous switch, current limiter circuit, UVLO circuit, thermal shutdown circuit, short protection
circuit, PWM/PFM selection circuit and others.
L1
L2
Inductor
Short
Protection
VOUT
R1
CFB
High Side
Current Limit
Phase
Compensation
R2
AGND
Error
Amp.
Comparator
S
Vref with
Soft Start
CE
VIN
CE Control Logic,
UVLO
Thermal Shutdown
Q
Logic
R
Minimum
On Time
Generator
Synch
Buffer
Drive
VIN
VOUT
Lx
PGND
PWM/PFM
Selector
The method is HiSAT-COT (High Speed circuit Architecture for Transient with Constant On Time) control, which features on
time control method and a fast transient response that also achieves low output voltage ripple.
The on time (ton) is determined by the input voltage and output voltage, and turns on the Pch MOS driver Tr. for a fixed time.
During the off time (toff), the voltage that is fed back through R1 and R2 is compared to the reference voltage by the error amp,
and the error amp output is phase compensated and sent to the comparator. The comparator compares this signal to the
reference voltage, and if the signal is lower than the reference voltage, sets the SR latch. On time then resumes. By doing this,
PWM operation takes place with the off time controlled to the optimum duty ratio and the output voltage is stabilized. The phase
compensation circuit optimizes the frequency characteristics of the error amp, and generates a ramp wave similar to the ripple
voltage that occurs in the output to modulate the output signal of the error amp. This enables a stable feedback system to be
obtained even when a low ESR capacitor such as a ceramic capacitor is used, and a fast transient response and stabilization of
the output voltage are achieved.
Generates an on time that depends on the input voltage and output voltage (ton). The on time is set as given by the equations below.
fosc=1.2MHz
ton (μs) = VOUT/VIN×0.833
The switching frequency can be obtained from the on time (ton), which is determined by the input voltage and output voltage,
as given by the equation below.
fOSC (MHz) = VOUT(V) / (VIN(V)×ton(μs))
When the load current is heavy and the voltage difference between input voltage and output voltage is small, 100% duty cycle
mode is activated and it keeps the Pch MOS driver Tr. turning on. 100% duty cycle mode attains a high output voltage stability
and a high-speed response under all load conditions, from light to heavy, even in conditions where the dropout voltage is low.
The error amp monitors the output voltage. The voltage divided by the internal R1 and R2 resistors is a feedback voltage for
Error Amp. and compared to the reference voltage. The output voltage of the error amp becomes higher when the feedback
voltage is higher than the reference voltage. The frequency characteristics of the error amp are optimized internally.
7/19
XCL221/XCL222 Series
XCL221/XCL222 Series is
Not Recommended for New Designs.
■OPERATIONAL EXPLANATION (Continued)
The reference voltage forms a reference that is used to stabilize the output voltage of the IC. After chip enable of the IC, the
reference voltage connected to the error amp increases linearly during the soft-start interval.
This allows the voltage divided by the internal R1 and R2 resistors and the reference voltage to be controlled in a balanced
manner, and the output voltage rises in proportion to the rise in the reference voltage. This operation prevents rush input current
and enables the output voltage to rise smoothly.
If the output voltage does not reach the set output voltage within the soft start time, such as when the load is heavy or a large
capacity output capacitor is connected, the balancing of the voltage divided by the internal resistors R1 and R2 and the
reference voltage is lost, however, the current restriction function activates to prevent an excessive increase of input current,
enabling a smooth rise of the output voltage.
PWM control is a continuous conduction mode, and operates at a stable switching frequency by means of an on time (ton) that
is determined by the input voltage and output voltage regardless of the load.
PWM/PFM auto switching control is a discontinuous conduction mode at light loads, and lowers the switching frequency to
reduce switching loss and improve efficiency.
The XCL221 series is internally fixed to PWM control.
The XCL222 series is internally fixed to PWM/PFM auto switching control.
Operation starts when “H” voltage is input into the CE pin. The IC can be put in the shutdown state by inputting “L” voltage into
the CE pin. In the shutdown state, the supply current of the IC is 0μA (TYP.), and the Pch MOS driver Tr. and Nch MOS switch
Tr. for synchronous rectification turn off. The CE pin is a CMOS input and the sink current is 0μA.
When the VIN voltage becomes 2.00V (TYP.) or lower, the P-ch MOS driver transistor 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 2.10V
(TYP.) or higher, switching operation takes place. By releasing the UVLO function, the IC performs the soft start function to
initiate output startup operation. 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.
For protection against heat damage of the ICs, thermal shutdown function monitors chip temperature. The thermal shutdown
circuit starts operating and the P-ch MOS driver and N-ch MOS driver transistor will be turned off when the chip’s temperature
reaches 150℃. When the temperature drops to 120℃ (TYP.) or less after shutting of the current flow, the IC performs the softstart function to initiate output startup operation.
The short-circuit protection circuit protects the device that is connected to this product and to the input/output in
situations such as when the output is accidentally shorted to GND. The short-circuit protection circuit monitors the output
voltage, and when the output voltage falls below the short-circuit protection threshold voltage, it turns off the Pch MOS driver Tr
and latches it. Once in the latched state, operation is resumed by turning off the IC from the CE pin and then restarting, or by reinput into the VIN pin.
8/19
XCL221/XCL222
XCL221/XCL222 Series is Not Recommended for New Designs.
Series
■OPERATIONAL EXPLANATION (Continued)
The product 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-ch MOS switch transistor located between the VOUT pin and
the GND pin. When the IC is disabled, electric charge at the output capacitor (CL) is quickly discharged so that it may avoid
application malfunction
Output Voltage Discharge characteristics
RDCHG=210Ω (TYP.) CL=10μF
V=VOUT(T) × e - t / τ
t =τLn (VOUT(T) / V)
CL : Capacitance of Output capacitor
RDCHG : CL auto-discharge resistance,
but it depends on supply voltage.
4.5
Output Voltage: VOUT(V)
V : Output voltage after discharge
VOUT(T) : Output voltage
t : Discharge time
τ: CL×RDCHG
5.0
Vout=1.2V
4.0
Vout=1.8V
3.5
Vout=3.3V
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
2
4
6
8
10
12
14
16
18
20
Discharge Time: t(ms)
The current limiter circuit of the XCL221/XCL222 series monitors the current flowing through the P-channel MOS driver
transistor connected to the Lx pin. 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. When the over current state is eliminated, the IC resumes its normal
operation.
■NOTE ON USE
1. For the phenomenon of temporal and transitional voltage decrease or voltage increase, the IC may be damaged or
deteriorated if IC is used beyond the absolute MAX. specifications.
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. The DC/DC converter characteristics depend greatly on the externally connected components as well as on the
characteristics of this IC, so refer to the specifications and standard circuit examples of each component when carefully
considering which components to select. Be especially careful of the capacitor characteristics and use B characteristics (JIS
standard) or X7R, X5R (EIA standard) ceramic capacitors.
4. Sufficiently reinforce the ground wiring. In particular, reinforce near the PGND and AGND pin as fluctuations of the ground
phase due to the ground current during switching may cause the operation of the IC to become unstable.
5. Mount external components as close as possible to the IC. Keep the wiring short and thick to lower the wiring impedance.
6. A feature of HiSAT-COT control is that it controls the off time in order to control the duty, which varies due to the effects of
power loss between the input (VIN pin) and output (VOUT pin) due to the load, and thus the switching frequency fluctuates. In
addition, changes in the on time due to 100% duty cycle mode are allowed. For this reason, caution must be exercised as the
characteristics of the switching frequency will vary depending on the external component characteristics, board layout, input
voltage, output voltage, load current and other parameters.
7. Due to propagation delay inside the product, the on time generated by the minimum on time generation circuit may not be the
same as the on time that is the ratio of the input voltage to the output voltage.
8. With regard to the current limiting value, the actual coil current may at times exceed the electrical characteristics due to
propagation delay inside the product.
9/19
XCL221/XCL222 Series
XCL221/XCL222 Series is
Not Recommended for New Designs.
■NOTE ON USE(Continued)
9. The CE pin is a CMOS input pin. Do not use with the pin open. If connecting to the input or ground, use a resistor up to 1MΩ.
To prevent malfunctioning of the device connected to this product or the input/output due to short circuiting between pins, it is
recommended that a resistor be connected.
10. If the output voltage drops below the short circuit protection threshold voltage at the end of the soft start interval, operation will stop.
11. PWM/PFM auto switching control is a discontinuous conduction mode when the load is light, and in cases where the voltage
difference between input and output is low or the coil inductance is higher than the value indicated in the standard circuit
example, the coil current may reverse when the load is light, and thus pulse skipping will not be possible and light load
efficiency will worsen.
12. When the input voltage is close to the minimum input voltage, the current limit circuit might not be able to work.
13. When the voltage difference between input voltage and output voltage is low, the load stability feature may deteriorate.
14. If the capacitance value is not sufficient by degrading CL due to the low temp. condition and DC bias feature, 100% duty
cycle might come up for the load transient condition. Add capacitance value for CL if necessary.
15. If the capacitance value is not sufficient by degrading CL due to the low temp. condition and DC bias feature, the duty cycle
might not be stable. Add capacitance value for CL if necessary.
16. Torex places an importance on improving our products and their reliability. We request that users incorporate fail-safe
designs and post-aging protection treatment when using Torex products in their systems.
17. The proper position of mounting is based on the coil terminal
18. Please use within the power dissipation range below. Please also note that the power dissipation may change by test
conditions, the power dissipation figure shown is PCB mounted.
Pd vs Operating Temperature
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 (%)
10/19
Package Body Temperature vs Operating Temperature
XCL221/XCL222 Series is Not Recommended for New Designs.
XCL221/XCL222
Series
■NOTE ON USE (Continued)
19. Instructions of pattern layouts
The operation may become unstable due to noise and/or phase lag from the output current when the wire impedance is high,
please place the input capacitor(CIN) and the output capacitor (CL) as close to the IC as possible.
(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 pin, PGND pin.
(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 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 P-channel and Nchannel MOS driver transistors. Please consider the countermeasures against heat if necessary.
(6) As precautions on mounting, please set the mounting position accuracy within 0.05 mm.
11/19
XCL221/XCL222 Series is
Not Recommended for New Designs.
XCL221/XCL222 Series
■TYPICAL PERFORMANCE CHARACTERISTICS
(1) Output Voltage vs. Output Current
XCL221B121ER-G
Vin=2.5V
Vin=3.3V
Vin=4.2V
Vin=5.0V
1.3
1.2
1.1
1.0
0.1
1
10
100
XCL222B121ER-G
1.4
Output Voltage: VOUT [V]
Output Voltage: VOUT [V]
1.4
1.3
1.2
1.1
1.0
1000
Vin=2.5V
Vin=3.3V
Vin=4.2V
Vin=5.0V
0.1
1
XCL221B181ER-G
Vin=3.0V
Vin=3.6V
Vin=4.2V
Vin=5.0V
1.9
1.8
1.7
1.6
0.1
1
10
100
1.9
1.8
1.7
1.6
1000
0.1
1
XCL221B331ER-G
Output Voltage: VOUT [V]
Output Voltage: VOUT [V]
3.3
3.2
1
10
100
Output Current: IOUT [mA]
12/19
100
1000
1000
XCL222B331ER-G
3.5
Vin=4.2V
Vin=5.0V
Vin=5.5V
0.1
10
Output Current: IOUT [mA]
3.4
3.1
1000
Vin=3.0V
Vin=3.6V
Vin=4.2V
Vin=5.0V
Output Current: IOUT [mA]
3.5
100
XCL222B181ER-G
2.0
Output Voltage: VOUT [V]
Output Voltage: VOUT [V]
2.0
10
Output Current: IOUT [mA]
Output Current: IOUT [mA]
Vin=4.2V
Vin=5.0V
Vin=5.5V
3.4
3.3
3.2
3.1
0.1
1
10
100
Output Current: IOUT [mA]
1000
XCL221/XCL222
XCL221/XCL222 Series is Not Recommended for New Designs.
Series
■TYPICAL PERFORMANCE CHARACTERISTICS(Continued)
(2) Efficiency vs. Output Current
XCL221B121ER-G
100
80
Efficiency: EFFI [%]
Efficiency: EFFI [%]
80
60
40
20
0
0.1
1
10
100
Output Current: IOUT [mA]
40
0
1000
XCL221B181ER-G
Vin=2.5V
Vin=3.3V
Vin=4.2V
Vin=5.0V
0.1
1
10
100
Output Current: IOUT [mA]
1000
XCL222B181ER-G
100
80
Efficiency: EFFI [%]
80
Efficiency: EFFI [%]
60
20
Vin=2.5V
Vin=3.3V
Vin=4.2V
Vin=5.0V
100
60
40
20
0
XCL222B121ER-G
100
1
10
100
1000
0
Vin=3.0V
Vin=3.6V
Vin=4.2V
Vin=5.0V
0.1
1
10
100
1000
Output Current: IOUT [mA]
Output Current: IOUT [mA]
XCL222B331ER-G
XCL221B331ER-G
100
40
20
Vin=3.0V
Vin=3.6V
Vin=4.2V
Vin=5.0V
0.1
60
Efficiency: EFFI [%]
80
60
40
20
0
Vin=4.2V
Vin=5.0V
Vin=5.5V
0.1
1
10
100
1000
Output Current: IOUT [mA]
13/19
XCL221/XCL222 Series
XCL221/XCL222 Series is
Not Recommended for New Designs.
■TYPICAL PERFORMANCE CHARACTERISTICS(Continued)
(3) Ripple Voltage vs. Output Current
14/19
XCL221B121ER-G
XCL222B121ER-G
XCL221B181ER-G
XCL222B181ER-G
XCL221B331ER-G
XCL222B331ER-G
XCL221/XCL222
XCL221/XCL222 Series is Not Recommended for New Designs.
Series
■TYPICAL PERFORMANCE CHARACTERISTICS(Continued)
4) Ambient temperature vs Output voltage
XCL221B121ER-G/XCL222B121ER-G
XCL221B181ER-G/XCL222B181ER-G
1.4
2.0
VIN=3.3V
VIN=3.3V
VIN=5.0V
Output Voltage : VOUT [V]
Output Voltage : VOUT [V]
VIN=5.0V
1.3
1.2
1.1
1.9
1.8
1.7
IOUT=100mA
1.0
-50
-25
0
25
50
75
100
IOUT=100mA
125
1.6
-50
-25
Ambient Temperature : Ta [℃]
0
25
50
75
100
125
Ambient Temperature : Ta [℃]
XCL221B331ER-G/XCL222B331ER-G
3.5
VIN=4.2V
Output Voltage : VOUT [V]
VIN=5.0V
3.4
3.3
3.2
IOUT=100mA
3.1
-50
-25
0
25
50
75
100
125
Ambient Temperature : Ta [℃]
5) Ambient temperature vs Quiescent current
6) Ambient temperature vs CE voltage
XCL222Bxx1ER-G
VIN=5.0V
XCL221/XCL222 Series
1.5
CE "H" Voltage
CE "L" Voltage
1.2
CE Voltage : VCE [V]
Quiescent Current : Iq [μA]
40
30
0.9
20
0.6
10
0
0.3
-50
-25
0
25
50
75
Ambient Temperature : Ta [℃]
100
125
0.0
-50
-25
0
25
50
75
100
Ambient Temperature : Ta [℃]
125
15/19
XCL221/XCL222 Series
XCL221/XCL222 Series is
Not Recommended for New Designs.
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
7) Load Transient Response
(1) XCL222B181ER-G, VIN=3.6V, VOUT=1.8V / IOUT=1mA ⇔100mA
VOUT = 1.8V
IOUT = 1mA ⇔ 100mA
(2) XCL222B181ER-G, VIN=3.6V, VOUT=1.8V / IOUT=10mA ⇔100mA
VOUT = 1.8V
IOUT = 10mA ⇔ 100mA
16/19
XCL221/XCL222 Series is Not Recommended for New Designs.
XCL221/XCL222
Series
■PACKAGING INFORMATION
For the latest package information go to, www.torexsemi.com/technical-support/packages
PACKAGE
OUTLINE / LAND PATTERN
CL-2025-02
CL-2025-02 PKG
THERMAL CHARACTERISTICS
Standard Board
CL-2025-02 Power Dissipation
17/19
XCL221/XCL222 Series is
Not Recommended for New Designs.
XCL221/XCL222 Series
■MARKING RULE
●CL-2025-02
①
represents products series
MARK
PRODUCT SERIES
7
8
1
①
②
③
⑤
3
④
2
6
5
4
XCL221B*****-G
XCL222B*****-G
② represents integer and oscillation frequency of the output voltage
OUTPUT
OSCILLATION
MARK
TYPE
PRODUCT SERIES
VOLTAGE(V)
FREQUENCY (MHz)
N
P
R
S
③
0.x
1.x
2.x
3.x
B
1.2
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
XCL22***0***-G
XCL22***A***-G
XCL22***1***-G
XCL22***B***-G
XCL22***2***-G
XCL22***C***-G
XCL22***3***-G
XCL22***D***-G
XCL22***4***-G
XCL22***E***-G
XCL22***5***-G
XCL22***F***-G
XCL22***6***-G
XCL22***H***-G
XCL22***7***-G
XCL22***K***-G
XCL22***8***-G
XCL22***L***-G
XCL22***9***-G
XCL22***M***-G
④,⑤ represents production lot number
01～09、0A～0Z、11～9Z、A1～A9、AA～AZ、B1～ZZ in order.
(G, I, J, O, Q, W excluded)
No character inversion used.
18/19
XCL22*B0*1**-G
XCL22*B1*1**-G
XCL22*B2*1**-G
XCL22*B3*1**-G
XCL221/XCL222 Series is Not Recommended for New Designs.
XCL221/XCL222
1.
The product 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.
The information in this datasheet is intended to illustrate the operation and characteristics of our
products. We neither make warranties or representations with respect to the accuracy or completeness
of the information contained in this datasheet nor grant any license to any intellectual property rights
of ours or any third party concerning with the information in this datasheet.
3.
Applicable export control laws and regulations should be complied and the procedures required by
such laws and regulations should also be followed, when the product or any information contained in
this datasheet is exported.
4.
The product is neither intended nor warranted for use in equipment of systems which require extremely
high levels of quality and/or reliability and/or a malfunction or failure which may cause loss of human
life, bodily injury, serious property damage including but not limited to devices or equipment used in 1)
nuclear facilities, 2) aerospace industry, 3) medical facilities, 4) automobile industry and other
transportation industry and 5) safety devices and safety equipment to control combustions and
explosions. Do not use the product for the above use unless agreed by us in writing in advance.
5.
Although we make continuous efforts to improve the quality and reliability of our products; nevertheless
Semiconductors are likely to fail with a certain probability. So in order to prevent personal injury and/or
property damage resulting from such failure, customers are required to incorporate adequate safety
measures in their designs, such as system fail safes, redundancy and fire prevention features.
6.
Our products are not designed to be Radiation-resistant.
7.
Please use the product listed in this datasheet within the specified ranges.
8.
We assume no responsibility for damage or loss due to abnormal use.
9.
All rights reserved. No part of this datasheet may be copied or reproduced unless agreed by Torex
Semiconductor Ltd in writing in advance.
Series
TOREX SEMICONDUCTOR LTD.
19/19
工商网监
湘ICP备2023018690号
