XCL211 Datasheet, PDF (1/16 Pages) Torex Semiconductor – 3.1mm×4.7mm, h=1.3mm

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
: 2.7V～6.0V
Output Voltage
: 0.9V～VIN (FB Voltage=0.8V±2%)
High Efficiency
: 94% (VIN=5.0V, VOUT=3.3V)
Output Current
: 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
CL Discharge, UVLO
Output Capacitor
: 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
V_IN=5.0V
V_OUT=3.3V
20
0
0.1
1
10
100
1000
Output Current : I_OUT (mA)
10000
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