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Torex Semiconductor - Inductor Built-in Step-Down micro DC/DC Converters

Numéro de référence XCL202
Description Inductor Built-in Step-Down micro DC/DC Converters
Fabricant Torex Semiconductor 
Logo Torex Semiconductor 





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XCL202 fiche technique
XCL201/XCL202 Series
Inductor Built-in Step-Down “micro DC/DC” Converters
ETR2802-003
GreenOperation Compatible
GENERAL DESCRIPTION
The XCL201/XCL201 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC
in one tiny package (2.5mm×2.0mm, h=1.0mm). A stable power supply with an output current of 400mA is configured using
only two capacitors connected externally.
Operating voltage range is from 2.0V to 6.0V. Output voltage is internally set in a range from 0.8V to 4.0V in increments of
0.05V. The device is operated by 1.2MHz, and includes 0.42P-channel driver transistor and 0.52N-channel switching
transistor. As for operation mode, the XCL201 series is PWM control, the XCL202 series is automatic PWM/PFM switching
control, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load).
During stand-by, the device is shutdown to reduce current consumption to as low as 1.0μA or less. With the built-in UVLO
(Under Voltage Lock Out) function, the internal driver transistor is forced OFF when input voltage becomes 1.4V or lower. The
series provide short-time turn-on by the soft start function internally set in 0.25ms (TYP). The series integrate CL auto
discharge function which enables the electric charge stored at the output capacitor CL to be discharged via the internal
auto-discharge switch located between the LX and VSS pins. When the devices enter stand-by mode, output voltage quickly
returns to the VSS level as a result of this function.
APPLICATIONS
Mobile phones, Smart phones
Bluetooth Headsets
WiMAX PDAs, MIDs, UMPCs
Portable game consoles
Digital cameras, Camcorders
SSD(Solid State Drive)
PND(Portable Navigation Device)
FEATURES
Ultra Small
: 2.5mm 2.0mm, h=1.0mm
Input Voltage
: 2.0V ~ 6.0V
Output Voltage
: 0.8V ~ 4.0V (±2.0%)
High Efficiency
Output Current
: 92%(VIN=4.2V,VOUT=3.3V)
: 400mA
Oscillation Frequency
: 1.2MHz (±15%)
Maximum Duty Cycle
: 100%
Output Capacitor
: Low ESR Ceramic
Current Limiter Circuit
: Constant Current & Latching
Control Methods
: PWM (XCL201)
PWM/PFM Auto (XCL202)
CE Function
: Soft-Start Circuit Built-In
Operating Ambient Temperature : -40 +85
Environmentally Friendly
: EU RoHS Compliant, Pb Free
TYPICAL APPLICATION CIRCUIT
XCL201/XCL202 Series
CL
10 F
400mA
L1
LX VIN
Vss Vss
VOUT
L2
CE
CIN
4.7 F
(TOP VIEW)
* “L1 and LX”, and “L2 and VOUT” is connected by wiring.
TYPICAL PERFORMANCE
CHARACTERISTICS
XCL201B331BR/XCL202B331BR
100
XCL202(PWM/PFM)
80
60
VIN= 5.5V
40
5.0V
XCL201(PWM)
20
4.2V
0
0.01
0.1
1
VOUT=3.3V
10 100 1000
Output Current:IOUT (mA)
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