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What is XCL208?

This electronic component, produced by the manufacturer "Torex Semiconductor", performs the same function as "400mA Inductor Built-in Step-Down micro DC/DC Converters".


XCL208 Datasheet PDF - Torex Semiconductor

Part Number XCL208
Description 400mA Inductor Built-in Step-Down micro DC/DC Converters
Manufacturers Torex Semiconductor 
Logo Torex Semiconductor Logo 


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XCL208/XCL209 Series
400mA Inductor Built-in Step-Down “micro DC/DC” Converters
ETR28003-002
GENERAL DESCRIPTION
GreenOperation Compatible
The XCL208/XCL209 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in
one tiny package (2.5mm×2.15mm, h=1.05mm). A stable power supply with an output current of 400mA is configured using only
two capacitors connected externally.
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 1.8V (2.0V) to 6.0V enables support for applications that require an alkaline battery (2-cell) or
AC adapter (5V) power supply. An internally fixed output voltage (0.8V to 4.0V) or an externally set output voltage can be selected.
The XCL208/XCL209 series uses synchronous rectification at an operating frequency of 3.0MHz. PWM control (XCL208) or
automatic PWM/PFM switching control (XCL209) can be selected. The XCL208 series has a fixed frequency, enabling the
suppression of output ripple. The XCL209 series achieves high efficiency while holding down output ripple across the full range of
loads, from light to heavy, enabling the extension of battery operation time.
Soft start and on/off functions with CL discharge are provided, and the IC can be put in the standby state by inputting a Low level
signal into the CE pin.
APPLICATIONS
Mobile phones, Smart phones
Bluetooth Headsets
Tablet PCs
PND
PC peripheral devices
DSC, Camcorders
TYPICAL APPLICATION CIRCUIT
FEATURES
Input Voltage
Fixed Output Voltage
High Efficiency
Output Current
Oscillation Frequency
CE Function
Protection Circuits
Control Methods
Operating Ambient Temperature
Package
Environmentally Friendly
: 1.8V ~ 6.0V (Type F)
: 2.0V ~ 6.0V (Type A/B)
: 0.8V ~ 4.0V (±2.0%)
: 90% (VIN=4.2V, VOUT=3.3V)
: 400mA
: 3.0MHz (±15%)
: Active High
Soft-start Circuit Built-in
CL High Speed Auto Discharge
: Current Limiter Built-in
(Constant Current & Latching)
: PWM (XCL208)
PWM/PFM (XCL209)
: -40+85
: USP-10B03
: EU RoHS Compliant, Pb Free
XCL208A / XCL208B / XCL209A / XCL209B Type
XCL208F / XCL209F Type
TYPICAL PERFORMANCE
CHARACTERISTICS
Efficiency vs. Output Current
XCL208x333DR/XCL209x333D
100
XCL209(PWM/PFM)
80
60
40
20
0
0.01
VIN= 4.2V
5.0V
XCL208(PWM)
V OUT =3.3V
0.1 1
10 100
Output Current:IOUT (mA)
1000
1/22

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XCL208 equivalent
XCL208/XCL209
Series
ELECTRICAL CHARACTERISTICS
1) XCL208Axx3DR/XCL209Axx3DR
PARAMETER
SYMBOL
Output Voltage
Operating Voltage Range
VOUT
VIN
Maximum Output Current
IOUTMAX
CONDITIONS
VIN=VCE=5.0V, IOUT=30mA
VIN=VOUT(T)+2.0V, VCE=1.0V (*8)
UVLO Voltage
Supply Current (XCL208)
Supply Current (XCL209)
Stand-by Current
VUVLO
IDD
ISTB
VCE =VIN, VOUT =0V, Voltage which Lx pin holding
“L” level (*1),(*10)
VIN=VCE=5.0V, VOUT=VOUT(T)×1.1V
VIN=5.0V, VCE=0V, VOUT=VOUT(T)×1.1V
Oscillation Frequency
fOSC VIN=VOUT(T)+2.0V, VCE=1.0V, IOUT=100mA
MIN.
<E-1>
2.0
TYP.
<E-2>
-
400 -
1.00
-
-
-
2.55
1.40
46
21
0
3.00
MAX.
<E-3>
6.0
-
1.78
65
35
1
3.45
Ta=25
UNIT CIRCUIT
V
V
mA
V
μA
μA
MHz
PFM Switching Current (*11)
IPFM VIN=VOUT(T)+2.0V, VCE=VIN , IOUT=1mA
<E-4> <E-5> <E-6> mA
PFM Duty Limit (*11)
Maximum Duty Cycle
Minimum Duty Cycle
Efficiency (*2)
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)
DTYLIMIT_PFM
DMAX
DMIN
EFFI
RLxH1
RLxH2
RLxL1
RLxL2
ILeakH
VCE=VIN=<C-1>, 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, VLX=0V
- 200
100 -
--
300
-
0
- <E-7>
-
- 0.35 0.55
- 0.42 0.67
- 0.45 0.65
- 0.52 0.77
- 0.01 1.00
%
%
%
%
μA
LX SW "L" Leakage Current (*5)
ILeakL
VIN=VOUT=5.0V, VCE= 0V, VLX=5.0V
- 0.01 1.00 μA
Current Limit (*9)
Output Voltage Temperature
Characteristics
CE "H" Voltage
CE "L" Voltage
CE "H" Current
CE "L" Current
Soft-start Time
Latch Time
Short Protection Threshold Voltage
Inductance Value
Allowed Inductor Current
ILIM
VOUT/
(VOUTTopr)
VCEH
VCEL
ICEH
ICEL
tSS
tLAT
VSHORT
L
IDC
VIN=VCE=5.0V, VOUT=VOUT(T)×0.9V (*7)
IOUT=30mA,
-40℃≦Topr85
VOUT=0V, Applied voltage to VCE,
Voltage changes Lx to “H” level (*10)
VOUT=0V, Applied voltage to VCE,
Voltage changes Lx to “L” level (*10)
VIN=VCE= 5.0V, VOUT=0V
VIN=5.0V, VCE=0V, VOUT=0V
VCE=0VVIN, 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
Test Frequency=1MHz
T=40
600
-
0.65
AVSS
-0.1
-0.1
0.5
1
<E-8>
-
-
800
±100
-
-
-
-
0.90
-
<E-9>
1.5
700
1000
-
6.00
0.25
0.1
0.1
2.50
20
<E-10>
-
-
mA
ppm/
V
V
μA
μA
ms
ms
V
μH
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 10μA (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 XCL209 series.
5/22


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