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XCM517AA03DR

Description
600mA Synchronous Dual Output Step-Down DC/DC Converters
File Size787KB,29 Pages
ManufacturerTOREX
Websitehttp://www.torex.co.jp/chinese/
Download Datasheet View All

XCM517AA03DR Overview

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 0.42ΩP-channel driver
transistor and 0.52ΩN-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 1.0μA 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.
■APPLICATIONS
●Mobile
phones, Smart phones
●Bluetooth
equipment
●Personal
Device Assistances
●Portable
games
●Digital
still cameras, camcorders
■FEATURES
P-ch Driver Transistor Built-In
N-ch Driver Transistor Built-In
Input Voltage Range
High Efficiency
Output Current
Oscillation Frequency
Maximum Duty Cycle
Soft-Start Circuit Built-In
Current Limiter Circuit Built-In
Ceramic Capacitor Compatible
Control Methods
: ON resistance 0.42Ω
: ON resistance 0.52Ω
: 2.7V ~ 6.0V
: 92% (TYP.)
: 600mA
: 1.2MHz, 3.0MHz (+15%)
: 100%
(Constant Current & Latching)
■TYPICAL
APPLICATION CIRCUIT
: 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.
* The dotted lines in the circuit indicates the connection using through-holes at the
backside of the PC board
VOUT1
AGND1
EN1
VIN2
PGND2
Lx2
1
VOUT
AGND
Lx
12
Lx1
PGND1
VIN1
EN2
AGND2
VOUT2
XC9235/XC9236
2
PGND
11
3
CE
VIN
10
4
VIN
CE
9
XC9235/XC9236
5
8
6
Lx
VOUT
7
(TOP VIEW)
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