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XCL202 데이터시트 PDF




Torex Semiconductor에서 제조한 전자 부품 XCL202은 전자 산업 및 응용 분야에서
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부품번호 XCL202 기능
기능 Inductor Built-in Step-Down micro DC/DC Converters
제조업체 Torex Semiconductor
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XCL202 데이터시트, 핀배열, 회로
XCL201/XCL202 Series
Inductor Built-in Step-Down “micro DC/DC” Converters
ETR2802-003
GreenOperation Compatible
GENERAL DESCRIPTION
The XCL201/XCL201 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 400mA 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 1.2MHz, and includes 0.42P-channel driver transistor and 0.52N-channel switching
transistor. As for operation mode, the XCL201 series is PWM control, the XCL202 series is automatic PWM/PFM switching
control, 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. The
series provide short-time turn-on by the soft start function internally set in 0.25ms (TYP). The series 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.
APPLICATIONS
Mobile phones, Smart phones
Bluetooth Headsets
WiMAX PDAs, MIDs, UMPCs
Portable game consoles
Digital cameras, Camcorders
SSD(Solid State Drive)
PND(Portable Navigation Device)
FEATURES
Ultra Small
: 2.5mm 2.0mm, h=1.0mm
Input Voltage
: 2.0V ~ 6.0V
Output Voltage
: 0.8V ~ 4.0V (±2.0%)
High Efficiency
Output Current
: 92%(VIN=4.2V,VOUT=3.3V)
: 400mA
Oscillation Frequency
: 1.2MHz (±15%)
Maximum Duty Cycle
: 100%
Output Capacitor
: Low ESR Ceramic
Current Limiter Circuit
: Constant Current & Latching
Control Methods
: PWM (XCL201)
PWM/PFM Auto (XCL202)
CE Function
: Soft-Start Circuit Built-In
Operating Ambient Temperature : -40 +85
Environmentally Friendly
: EU RoHS Compliant, Pb Free
TYPICAL APPLICATION CIRCUIT
XCL201/XCL202 Series
CL
10 F
400mA
L1
LX VIN
Vss Vss
VOUT
L2
CE
CIN
4.7 F
(TOP VIEW)
* “L1 and LX”, and “L2 and VOUT” is connected by wiring.
TYPICAL PERFORMANCE
CHARACTERISTICS
XCL201B331BR/XCL202B331BR
100
XCL202(PWM/PFM)
80
60
VIN= 5.5V
40
5.0V
XCL201(PWM)
20
4.2V
0
0.01
0.1
1
VOUT=3.3V
10 100 1000
Output Current:IOUT (mA)
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XCL202 pdf, 반도체, 판매, 대치품
XCL201/XCL202 Series
ELECTRICAL CHARACTERISTICS
XCL201B121BR/XCL202B121BR, VOUT=1.2V, fOSC=1.2MHz, Ta=25
PARAMETER
SYMBOL
CONDITIONS
MIN. TYP. MAX. UNITS CIRCUIT
Output Voltage
Operating Voltage Range
Maximum Output Current
VOUT
VIN
IOUTMAX
When connected to external components,
VIN=VCE=5.0V, IOUT=30mA
VIN=VOUT(T)+2.0V, VCE=1.0V
When connected to external components (*8)
1.176
2.0
400
1.200 1.224
- 6.0
--
V
V
mA
UVLO Voltage
VUVLO
VCE=VIN,VOUT=0V
Voltage which Lx pin holding “L” level (*1, *10)
1.00 1.40 1.78
V
Supply Current (XCL201)
Supply Current (XCL202)
IDD VIN=VCE=5.0V, VOUT=VOUT(T) 1.1V
- 22 50 μA
- 15 33
Stand-by Current
Oscillation Frequency
ISTB
fOSC
PFM Switching Current (*11)
IPFM
PFM Duty Limit (*11)
Maximum Duty Cycle
Minimum Duty Cycle
DTYLIMIT_PFM
MAXDTY
MINDTY
Efficiency (*2)
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
Lx SW "H" Leakage Current (*5)
Current Limit (*9)
Output Voltage
Temperature Characteristics
RL H1
RL H2
RL L1
RL L2
ILeakH
ILIM
VOUT/
(VOUT Topr)
CE "H" Voltage
VCEH
CE "L" Voltage
CE "H" Current
CE "L" Current
Soft Start Time
VCEL
ICEH
ICEL
tSS
Latch Time
tLAT
Short Protection
Threshold Voltage
VSHORT
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
VCE=VIN = 2.0V, IOUT=1mA
VIN=VCE=5.0V, VOUT=VOUT (T) 0.9V
VIN=VCE=5.0V, VOUT=VOUT (T) 1.1V
When connected to external components,
VCE=VIN=VOUT (T)+1.2V, IOUT=100mA
VIN=VCE=5.0V, VOUT=0V,ILX=100mA (*3)
VIN=VCE=3.6V, VOUT=0V,ILX=100mA (*3)
VIN=VCE=5.0V (*4)
VIN=VCE=3.6V (*4)
VIN=VOUT=5.0V, VCE=0V, LX=0V
VIN=VCE=5.0V, VOUT=VOUT (T) 0.9V (*7)
IOUT=30mA
-40 Topr 85
VOUT=0V, Applied
Voltage changes
Lvxolttoag“He ”toleVveCEl ,(*10)
VOUT=0V, Applied
Voltage changes
Lvxolttoag“Le”tolevVeClE(,*10)
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)
Short Lx at 1resistance (*6)
Sweeping VOUT, VIN=VCE=5.0V, Short Lx at
1resistance, VOUT voltage which Lx becomes “L”
level within 1ms
-
1020
0
1200
1.0
1380
μA
kHz
140
-
100
-
-
-
-
-
-
-
700
-
0.65
VSS
- 0.1
- 0.1
-
1.0
180
200
-
-
86
0.35
0.42
0.45
0.52
0.01
800
100
240 mA
300 %
-%
0%
-%
0.55
0.67
0.66
0.77
1.0
1000
μA
mA
- ppm/
- 6.0 V
-
-
-
0.25
0.25
0.1
0.1
0.40
V
μA
μA
ms
- 20 ms
0.450 0.600 0.750 V
-
-
CL Discharge
Inductance Value
RDCHG
L
VIN=5.0V, LX=5.0V, VCE=0V, VOUT=open
Test frequency=1MHz
200 300 450
- 4.7 - μH
-
Allowed Inductor Current
IDC
T=40
- 600 - mA -
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 ()=(VIN - Lx pin measurement voltage) / 100mA
(*4) Design value
(*5) When temperature is high, a current of approximately 10 A (maximum) may leak.
(*6) Time until it short-circuits VOUT with GND via 1of resistor from an operational state and is set to Lx=0V from current limit pulse generating.
(*7) When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.
(*8) 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.
(*9) Current limit denotes the level of detection at peak of coil current.
(*10) “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V
(*11) IPFM and DTYLIMIT_PFM are defined only for the XCL202 series which have PFM control function. (Not for the XCL201 series)
4/21

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XCL202 전자부품, 판매, 대치품
XCL201/XCL202
Series
OPERATIONAL DESCRIPTION
The XCL201/XCL202 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 below.) 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.
L2
VOUT
VIN
VSS
Inductor
Phase
Compensation
R1 CFB
FB
Error
Amp.
R2
VSHORT
Current Feedback
Current Limit
PWM
Comparator
Logic
Synch
Buffer
Drive
Vref with
Soft Start,
CE
PWM/PFM
Selector
UVLO Cmp
R3 UVLO
Ramp Wave
Generator
OSC
CE/
R4
CE
Control
Logic
L1
Lx
VSS
CE
<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 1.2MHz. 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.
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관련 데이터시트

부품번호상세설명 및 기능제조사
XCL201

Inductor Built-in Step-Down micro DC/DC Converters

Torex Semiconductor
Torex Semiconductor
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