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Torex Semiconductor

XC9254R Datasheet Preview

XC9254R Datasheet

Synchronous Step-Down DC/DC Converter

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XC9254R Series
ETR0529-003
600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converter
GreenOperation Compatible
GENERAL DESCRIPTION
The XC9254R series is a group of synchronous-rectification type DC/DC converters with a built-in 0.42 P-channel MOS driver
transistor and 0.52 N-channel MOS switching transistor, designed to allow the use of ceramic capacitors. Operating voltage
range is from 2.0V to 6.0V. The XC9254R001 type has a fixed output voltage of 1.2V (accuracy: 2.0%). The device provides
a high efficiency, stable power supply with an output current of 600mA to be configured using only a coil and two capacitors
connected externally. With the built-in oscillator, 1.2MHz is fixed internally. As for operation mode, the XC9254R 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).
The soft start and current control functions are internally optimized. During stand-by, all circuits are shutdown to reduce current
consumption to as low as 1.0 A or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel
MOS driver transistor is forced OFF when input voltage becomes 1.4V or lower.
Two types of package SOT-25 and USP-6C are available.
APPLICATIONS
Smart phones / Mobile phones
Bluetooth
Mobile devices / terminals
Portable game consoles
Digital still cameras / Camcorders
Digital audio equipments
Note PCs / Tablet PCs
FEATURES
Driver Transistor Built-In
: 0.42 P-ch driver transistor
0.52 N-ch switch transistor
Input Voltage
: 2.0V ~ 6.0V
Output Voltage
: 1.2V
High Efficiency
: 92% (TYP.)
Output Current
: 600mA
Oscillation Frequency
: 1.2MHz (+15%)
Maximum Duty Cycle
: 100%
Control Methods
: PWM/PFM Auto
Function
: Current Limiter Circuit Built-In
(Constant Current & Latching)
Capacitor
Operating Ambient Temperature
Packages
CL Discharge
: Low ESR Ceramic Capacitor
: -40 +85
: SOT-25, USP-6C
Environmentally Friendly
: EU RoHS Compliant, Pb Free
* Performance depends on external components and wiring on the PCB.
TYPICAL APPLICATION CIRCUIT
CE
1/17




Torex Semiconductor

XC9254R Datasheet Preview

XC9254R Datasheet

Synchronous Step-Down DC/DC Converter

No Preview Available !

XC9254R Series
PIN CONFIGURATION
CE
* Please short the VSS pin (No. 2 and 5).
* The dissipation pad for the USP-6C package should be solder-plated
in recommended mount pattern and metal masking so as to enhance
mounting strength and heat release. If the pad needs to be connected
to other pins, it should be connected to the VSS (No. 5) pin.
PIN ASSIGNMENT
PIN NUMBER
SOT-25
USP-6C
16
2 2, 5
34
43
51
PIN NAME
VIN
VSS
CE
VOUT
Lx
FUNCTION
Power Input
Ground
High Active Enable
Fixed Output Voltage Pin
Switching Output
2/17


Part Number XC9254R
Description Synchronous Step-Down DC/DC Converter
Maker Torex Semiconductor
Total Page 17 Pages
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