XCL208 Datasheet, PDF (1/22 Pages) Torex Semiconductor – 400mA Inductor Built-in Step-Down “micro DC/DC” Converters

XCL208/XCL209 Series
400mA Inductor Built-in Step-Down “micro DC/DC” Converters
ETR28003-001a
ˑGreenOperation Compatible
˙GENERAL DESCRIPTION
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 C_L 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
■^ç TYPICAL APPLICATION CIRCUIT
■FEATURES
Input Voltage
: 1.8V ~ 6.0V (Type F)
: 2.0V ~ 6.0V (Type A/B)
Fixed Output Voltage
: 0.8V ~ 4.0V (±2.0%)
High Efficiency
: 90% (V_IN=4.2V, V_OUT=3.3V)
Output Current
: 400mA
Oscillation Frequency
: 3.0MHz (±15%)
CE Function
: Active High
Soft-start Circuit Built-in
C_L High Speed Auto Discharge
Protection Circuits
: Current Limiter Built-in
(Constant Current & Latching)
Control Methods
: PWM (XCL208)
PWM/PFM (XCL209)
Operating Ambient Temperature : -40℃ʙ+85℃
Package
: USP-10B03
Environmentally Friendly
: EU RoHS Compliant, Pb Free
XCL208A / XCL208B / XCL209A / XCL209B Type
XCL208F / XCL209F Type
˙çTYPICAL PERFORMANCE
CHARACTERISTICS
●Efficiency vs. Output Current
XCL208x333DR/XCL209x333D
100
XCL209(PWM/PFM)
80
60
40
20
0
0.01
V_IN= 4.2V
5.0V
XCL208(PWM)
V _OUT =3.3V
0.1
1
10
100
Output Current:IOUT (mA)
1000
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