XC9254R Datasheet, PDF (1/17 Pages) Torex Semiconductor – 600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converter

XC9254R Series
ETR0529-003
600mA Driver Tr. Built-In, Synchronous Step-Down DC/DC Converter
ˑGreenOperation Compatible
˙GENERAL DESCRIPTION
The XC9254R series is a group of synchronous-rectification type DC/DC converters with a built-in 0.42ЊP-channel MOS driver
transistor and 0.52ЊN-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: ʶ2.0%). 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 1.0ЖA 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
: 0.42Њ P-ch driver transistor
0.52Њ 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
C_L Discharge
: Low ESR Ceramic Capacitor
: -40ˆ ʙ +85ˆ
: 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
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