XCM517 Datasheet, PDF (1/28 Pages) Torex Semiconductor – 600mA Synchronous Dual Output Step-Down DC/DC Converters

XCM517 Series
600mA Synchronous Dual Output Step-Down DC/DC Converters
ETR2425-007
˙GENERAL DESCRIPTION
The XCM517 series is a multi combination module IC which comprises of two 600mA driver transistor built-in synchronous
step–down DC/DC converter. The XCM517 series is available in an ultra small package USP-12B01 suited for space
conscious applications.
The XCM517 series is a group of synchronous-rectification type DC/DC converters with a built-in 0.42ЊP-channel driver
transistor and 0.52ЊN-channel switching transistor, designed to allow the use of ceramic capacitors. The ICs enable a high
efficiency, stable power supply with an output current of 600mA to be configured using only a coil and two capacitors connected
externally. Operating voltage range is from 2.7V to 6.0V. With the built-in oscillator, either 1.2MHz or 3.0MHz can be selected
for suiting to your particular application. As for operation mode, the XCM517xA / XCM517xB series are PWM control, the
XCM517xC / XCM517xD series are 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 driver transistor is forced OFF when input voltage becomes 1.4V or lower.
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˙APPLICATIONS
˔Mobile phones, Smart phones
˔Bluetooth equipment
˔Personal Device Assistances
˔Portable games
˔Digital still cameras, camcorders
˙TYPICAL APPLICATION CIRCUIT
˙FEATURES
P-ch Driver Transistor Built-In : ON resistance 0.42Ω
N-ch Driver Transistor Built-In : ON resistance 0.52Ω
Input Voltage Range
: 2.7V ~ 6.0V
High Efficiency
: 92% (TYP.)
Output Current
: 600mA
Oscillation Frequency
: 1.2MHz, 3.0MHz (+15%)
Maximum Duty Cycle
: 100%
Soft-Start Circuit Built-In
Current Limiter Circuit Built-In (Constant Current & Latching)
Ceramic Capacitor Compatible
Control Methods
: PWM (XCM517xA / XCM517xB)
PWM/PFM Auto (XCM517xC / XCM517xD)
*Performance depends on external components and wiring on the PCB.
Combination of voltage
1 ch
2ch
XCM517xx01D
1.2V
1.8V
XCM517xx02D
1.2V
3.3V
XCM517xx03D
1.8V
3.3V
XCM517xx06D
1.5V
1.8V
XCM517xx07D
1.5V
3.3V
*The other combination of voltage is semi-custom.
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VOUT1 ₁
AGND1 ₂
EN1 ₃
VIN2 ₄
PGND2 ₅
Lx2 ₆
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VOUT
Lx
XC9235/XC9236
AGND
PGND
CE
VIN
VIN
CE
XC9235/XC9236
Lx
VOUT
(TOP VIEW)
12 ^Lx1
11 PGND1
10 ^VIN1
EN2
9
AGND2
8
7 ^VOUT2
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* The dotted lines in the circuit indicates the connection using through-holes at the
backside of the PC board
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