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XCL211 Datasheet PDF - Torex

Part Number XCL211
Description 2.0A Inductor Built-in Step-Down micro DC/DC Converters
Manufacturers Torex 
Logo Torex Logo 



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XCL211 datasheet, circuit
XCL211/XCL212 Series
ETR28006-001
2.0A Inductor Built-in Step-Down “micro DC/DC” Converters
GreenOperation Compatible
GENERAL DESCRIPTION
The XCL211/XCL212series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in
one tiny package (3.1mm×4.7mm, h=1.3mm).
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 2.7V to 6.0V enables support for applications that require an externally set output voltage can
be selected. The XCL211/XCL212 series uses synchronous rectification at an operating frequency of 2.4MHz. PWM control
(XCL211) or automatic PWM/PFM switching control (XCL212) can be selected. The XCL211 series has a fixed frequency,
enabling the suppression of output ripple. The XCL212 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.
The series have a high speed soft-start as fast as 1ms 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 2.4V or lower. It’s suitable for
large-current application due to limit current is configured 4.0A in typical. 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 GND
pins. Due to CL discharge function, malfunction on LX is prevented when Stand-by mode.
APPLICATIONS
Note PCs
Printers
Tablet PCs
PND(Portable Navigation Device)
FEATURES
Package Size
: 3.1mm×4.7mm, h=1.3mm
Input Voltage
: 2.7V6.0V
Output Voltage
High Efficiency
Output Current
: 0.9VVIN (FB Voltage=0.8V±2%)
: 94% (VIN=5.0V, VOUT=3.3V)
: 2.0A
Oscillation Frequency : 2.4MHz (±15%)
Maximum Duty Cycle : 100%
Control Methods
: PWM (XCL211)
PWM/PFM (XCL212)
Functions
: Current Limit Circuit (automatic return)
Soft-Start Circuit Built-In
Output Capacitor
CL Discharge, UVLO
: Low ESR Ceramic Capacitor
Operating Ambient Temperature : -40℃~+85
Package
: USP-11B01
Environmental Friendly : EU RoHS Compliant, Pb Free
TYPICAL APPLICATION CIRCUIT
 
TYPICAL PERFORMANCE
CHARACTERISTICS
XCL211B082DR /XCL212B082DR
100
XCL212
80
XCL211
60
40
VIN=5.0V
VOUT=3.3V
20
0
0.1
1 10 100
Output Current : IOUT (mA)
1000
10000
1/16

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XCL211 equivalent
TEST CIRCUITS
< Circuit No.① >
XCL211/XCL212
Series
A
VIN
CIN1
L2
PVIN
AVIN
CIN2
CE
VCE
L1 Wave Form Measure Point
※External Components
L  CIN1 :20μF(ceramic)
LX CIN2 :1μF(ceramic)
CFB R1
CL :20μF(ceramic)
FB
CL A
R1 :15kΩ
R2 :30kΩ
GND
V IOUT
CFB :1000pF(ceramic)
R2  L :1.5μH(Selected goods)
< Circuit No.② >
A
VIN 1μF
L2
PVIN
AVIN
CE
VCE
L1
LX
FB
GND
VFB
< Circuit No.③ >
VIN 1μF
L2
PVIN
AVIN
CE
VCE
L1
LX
FB
GND
Wave Form Measure Point
200Ω
VFB
< Circuit No.④ >
VIN 1μF
L2
PVIN
AVIN
CE
VCE
L1
LX
FB
GND
Wave Form Measure Point
ILx
VFB
< Circuit No.⑤ >
L2
A
1μF
VIN
VCE
ICEH
A
ICEL
PVIN
AVIN
CE
L1
LX
FB
GND
ILeakH
A
IFB H
A
IFB L
VFB
< Circuit No.⑥ >
VIN 1μF
L2
PVIN
AVIN
CE
VCE
L1
LX
FB
GND
ILx
A
V
VFB
VLx
5/16

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Information Total 16 Pages
Download[ XCL211.PDF Datasheet ]

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