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XCL211

Description
3.1mm×4.7mm, h=1.3mm
File Size621KB,16 Pages
ManufacturerTOREX
Websitehttp://www.torex.co.jp/chinese/
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XCL211 Overview

3.1mm×4.7mm, h=1.3mm

XCL211/XCL212
Series
2.0A Inductor Built-in Step-Down “micro DC/DC” Converters
ETR28006-001
☆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 C
L
discharge function which enables the
electric charge at the output capacitor C
L
to be discharged via the internal discharge switch located between the LX and GND
pins. Due to C
L
discharge function, malfunction on LX is prevented when Stand-by mode.
■APPLICATIONS
●Note
PCs
●Printers
●Tablet
PCs
●PND(Portable
Navigation Device)
■FEATURES
Package Size
Input Voltage
Output Voltage
High Efficiency
Output Current
Oscillation Frequency
Maximum Duty Cycle
Control Methods
Functions
: 3.1mm×4.7mm, h=1.3mm
: 2.7V½6.0V
: 0.9V½V
IN
(FB Voltage=0.8V±2%)
: 94% (V
IN
=5.0V, V
OUT
=3.3V)
: 2.0A
: 2.4MHz (±15%)
: 100%
: PWM (XCL211)
PWM/PFM (XCL212)
: Current Limit Circuit (automatic return)
Soft-Start Circuit Built-In
C
L
Discharge, UVLO
Output Capacitor
: Low ESR Ceramic Capacitor
Operating Ambient Temperature : -40℃½+85℃
Package
: USP-11B01
Environmental Friendly : EU RoHS Compliant, Pb Free
■TYPICAL
APPLICATION CIRCUIT
TYPICAL PERFORMANCE
CHARACTERISTICS
XCL211B082DR /XCL212B082DR
100
XCL212
 
80
Efficiency : EFFI (%)
XCL211
60
40
V
IN
=5.0V
V
OUT
=3.3V
20
0
0.1
1
10
100
1000
10000
Output Current : I
OUT
(mA)
1/16

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XCL211 XCL212
Description 3.1mm×4.7mm, h=1.3mm 3.1mm×4.7mm, h=1.3mm
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