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XCL221 데이터시트 PDF




Torex Semiconductor에서 제조한 전자 부품 XCL221은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 XCL221 기능
기능 0.5A Inductor Built-in Step-Down Converters
제조업체 Torex Semiconductor
로고 Torex Semiconductor 로고


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XCL221 데이터시트, 핀배열, 회로
XCL221/XCL222 Series
ETR28008-001
0.5A Inductor Built-in Step-Down “micro DC/DC” Converters
GENERAL DESCRIPTION
GreenOperationCompatible
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 HiSAT-COT+automatic PWM/PFM switching control (XCL222) can be selected.
The series have a high speed soft-start as fast as 0.25ms (TYP.) in typical for quick turn-on. With the built-in UVLO (Under
Voltage Lock Out) 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 an original Torex term for High Speed Transient Response.
APPLICATIONS
Wearable Device
Bluetooth Module
SSD(Solid State Drive)
Mobile phone
Digital still camera
Portable game devices
FEATURES
Input Voltage
Output Voltage
Oscillation Frequency
Output Current
Efficiency
Control Methods
Circuit Protection
Functions
: 2.5V5.5V
: 0.8V3.6V(±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
Output Capacitor
: 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)
0.5A
CL
10μF
7
1 Lx
VIN 6
2 AGND PGND 5
3 VOUT
8
CE 4
CIN
4.7μF
1/20




XCL221 pdf, 반도체, 판매, 대치품
XCL221/XCL222 Series
ELECTRICAL CHARACTERISTICS
XCL221Bxx1ER-G/XCL222Bxx1ER-G
PARAMETER
SYMBOL
CONDITIONS
Output Voltage
Operating Voltage Range
Maximum Output Current
UVLO Voltage (*2)
Quiescent Current
(XCL222)
Quiescent Current
(XCL221)
Stand-by Current
Minimum ON time (*2)
Thermal Shutdown
Thermal shutdown
Hysteresis
LxSW ”H” ON
Resistance
LxSW ”L” ON
Resistance (*4)
LxSW ”H” Leakage
Current
LxSW ”L” Leakage
Current
Current Limit (*5)
Output Voltage
Temperature
Characteristics
CE”H” Voltage
CE”L” Voltage
CE”H” Current
CE”L” Current
Soft-start Time
Short Protection
Threshold Voltage
VOUT
VIN
IOUTMAX
VUVLO
Iq
Iq
ISTB
tONmin
TTSD
THYS
RLXH
RLXL
ILeakH
ILeakL
ILIMH
VOUT/
(VOUTtopr)
VCEH
VCEL
ICEH
ICEL
tSS
VSHORT
When connected to external conponets,
IOUT =30mA
When connected to external components,
VIN =<C-1>
Vout=0.6V,
Voltage which Lx pin holding ”L” level (*6)
VOUT =VOUT(E) ×1.1V
VOUT =VOUT(E) ×1.1V
VCE =0V
When connected to external components,
VIN =VCE=<C-1>, IOUT=1mA
VOUT=0.6V, ILX=100mA (*3)
VOUT=VOUT(T) × 1.1V, ILX=100mA (*3)
VIN=5.5V, VCE=0V, VOUT=0V, VLX=5.5V
VIN=5.5V, VCE=0V, VOUT=0V, VLX=0V
VOUT=0.6V, ILx until Lx pin oscillates
IOUT=30mA
-40℃≦Topr105
VOUT=0.6V, Applied voltage to VCE,
Voltage changes Lx to “H” level (*6)
VFB=0.6V, Applied voltage to VCE,
Voltage changes Lx to “L” level (*6)
VIN=5.5V, VCE=5.5V, VOUT=0V
VIN=5.5V, VCE=0V, VOUT=0V
VCE=0V5.0V, 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)
CL Discharge
Inductance
Inductor Rated Current
RDCHG
L
IDC
VCE=0V, VOUT=4.0V
Test Freq.=1MHz
T=+40deg
MIN.
<E-1>
2.5
500
TYP.
<E-2>
-
-
MAX.
<E-3>
5.5
-
Ta=25
UNITS CIRCUIT
V
V
mA
1.35 2.0 2.48
V
- 15 25 μA
-
-
<E-5>
-
-
250
0.0
<E-6>
150
30
450
1.0
<E-7>
-
-
μA
μA
ns
-
0.24 0.37
-
0.16 0.30
- 0.0 30.0 μA
- 0.0 1.0 μA
1.3 1.5 2.5
A
- ±100 - ppm/
1.4 -
AGND
-0.1
-0.1
-
-
-
0.10 0.30
VIN
0.3
0.1
0.1
0.50
V
V
μA
μA
ms
0.17
50
-
-
0.27
210
4.7
700
0.37
300
-
-
V
μH
mA
-
-
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"=VINVIN - 1.2V, "L"=- 0.1V+ 0.1V
4/20

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XCL221 전자부품, 판매, 대치품
XCL221/XCL222
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. (See the BLOCK DIAGRAM below.)
L2 L1
Inductor
VOUT
AGND
CE
R1 CFB
Phase
Compensation
Short
Protection
R2
Error
Amp.
Comparator
Vref with
Soft Start
S
Q
R
High Side
Current Limit
Logic
Synch
Buffer
Drive
CE Control Logic,
UVLO
Thermal Shutdown
Minimum
On Time
Generator
VIN
VOUT
PWM/PFM
Selector
VIN
Lx
PGND
<BLOCK DIAGRAM>
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.
<Minimum on time generation circuit>
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
<Switching frequency>
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))
<100% duty cycle mode>
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.
<Error amp>
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.
7/20

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