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Torex Semiconductor

XCM520 Datasheet Preview

XCM520 Datasheet

600mA Synchronous Step-Down DC/DC Converter Dual LDO Regulator

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XCM520 Series
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ETR2427-002a
600mA Synchronous Step-Down DC/DC Converter + Dual LDO Regulator
GENERAL DESCRIPTION
The XCM520 series is a multi chip module which comprises of a 600mA driver transistor built-in synchronous step–down
DC/DC converter and a dual CMOS LDO regulator. The device is housed in small USP-12B01 package which is ideally
suited for space conscious applications.
The XCM520 can replace this dual DC/DC to eliminate one inductor and reduce output noise.
The DC/DC converter with a built-in 0.42 P-channel MOS and a 0.52 N-channel MOS provides a high efficiency, stable
power supply up to 600mA to using only a coil and two ceramic capacitors connected externally.
The highly accurate, low noise, dual CMOS LDO regulator includes a reference voltage source, error amplifiers, driver
transistors, current limiters and phase compensation circuits internally. The series is also fully compatible with low ESR
ceramic capacitors.
This high level of output stability is maintained even during frequent load fluctuations, due to the excellent transient response
performance and high PSRR achieved across a broad range of frequencies. The EN function allows the output of each
regulator to be turned off independently, resulting in greatly reduced power consumption.
APPLICATIONS
Mobile phones, Smart phones
Bluetooth headsets
WLAN PC cards
Portable HDDs, SSDs
PDAs, PNDs, UMPCs
MP3 players, Media players
Portable game consoles
Cordless phones, Radio communication equipment
FEATURES
<DC/DC Convertor Block>
Driver Transistor
: 0.42P-channel MOS Built-in
Switching Transistor : 0.52N-channel MOS Built-in
Input Voltage Range : 2.7V 6.0V
Output Voltage Range : 0.8V 4.0V
High Efficiency
: 92% (TYP.) *
Output Current
: 600mA
Oscillation Frequency : 1.2MHz,3.0MHz (±15%)
Soft-Start
: Built-In Soft-Start
Current Limiter Circuit : Constant Current & Latching
Control
: Fixed PWM, Auto PWM/PFM
*Performance depends on external components and wiring on PCB wiring.
TYPICAL APPLICATION CIRCUIT
VOUT1
1.8V
CL2
1μF
CIN1
1μF
VIN
3.3V
CIN2
4.7μF
1 VOUT2
2 EN2
3 VIN1
4 VIN2
5 PGND
VOUT1 12
VSS 11
EN1 10
EN3 9
AGND 8
6 Lx
VOUT3 7
L
1.5μH
VOUT2
1.2V
CL1
1μF
CL3
10μF
VOUT3
2.3V
* The dashed lines denote the connection using through-holes
at the backside of the PC board.
* The above circuit uses XCM520AA01 series.
* The DC/DC block VOUT3 is connected to the dual LDO regulator
VIN1 in this connection.
* Also, it is possible to operate two VIN independently.
<Dual LDO Regulator Block>
Maximum Output Current : 150mA (Limiter 300mA TYP.)
Dropout Voltage
: 100mV @ 100mA
Operating Voltage Range : 1.5V~6.0V
Output Voltage Range : 0.8V~5.0V (0.05V increments)
High Accuracy
: ±2% (VOUT>1.5V)
±30mV (VOUT 1.5V)
Low Power Consumption : 25 A (TYP.)
Stand-by Current
: Less than 0.1 A(TYP.)
High Ripple Rejection : 70dB @1kHz
Low Output Noise
Operating Temperature Range : -40 ~+85
Low ESR Capacitor : Ceramic Capacitor Compatible
Package
: USP-12B01
Standard Voltage Combinations : VOUT1
XCM520xx01D
1.8V
VOUT2
1.2V
VOUT3
2.3V
XCM520xx02D
1.8V
1.3V
2.3V
XCM520xx03D
1.8V
1.2V
2.2V
XCM520xx04D
1.8V
1.2V
2.8V
XCM520xx05D
1.0V
1.2V
1.8V
XCM520xx06D
0.8V
1.5V
1.8V
*Other combinations are available as semi-custom products.
Environmentally Friendly : EU RoHS Compliant, Pb Free
1/43




Torex Semiconductor

XCM520 Datasheet Preview

XCM520 Datasheet

600mA Synchronous Step-Down DC/DC Converter Dual LDO Regulator

No Preview Available !

XCM520 Series
PIN CONFIGURATIOIN
VOUT2 1
EN2 2
VIN1 3
VIN2 4
PGND 5
Lx 6
VOUT2
VOUT1
XC6401
EN2 VSS
VIN EN1
VIN EN/MODE
XC9235/9236
PGND
AGND
Lx VOUT3
(TOP VIEW)
12 VOUT1
11 VSS
10 EN1
9 EN3
8 AGND
7 VOUT3
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PIN No
1
2
3
4
5
6
7
8
9
10
11
12
XCM520
VOUT2
EN2
VIN1
VIN2
PGND
Lx
VOUT3
AGND
EN3
EN1
VSS
VOUT1
XC6401
VOUT2
EN2
VIN
EN1
VSS
VOUT1
XC9235/XC9236
VIN
PGND
Lx
VOUT
AGND
CE
VOUT1 12
VSS 11
EN1 10
EN3/MODE 9
*1
1 VOUT2
2 EN2
3 VIN1
4 VIN2
NOTE:
* The two heat-sink pads on the back side are electrically isolated in the package.
*1: The pad of the regulator should be VSS level.
*2: The pad of the DC/DC should be VSS level.
* The DC/DC ground pin (No. 5 and 8) should be connected for use.
* The two pads are recommended to open on the board, but care must be taken for
voltage level of each heat-sink pad when they are electrically connected.
VSSA 8
*2 5 VSSD
VOUT3 7
6 Lx
(TOP VIEW)
PIN ASSIGNMENT
PIN No
1
2
3
4
5
6
7
8
9
10
11
12
XCM520
VOUT2
EN2
VIN1
VIN2
PGND
Lx
VOUT3
AGND
EN3
EN1
VSS
VOUT1
FUNCTIONS
Voltage Regulator Output2
Voltage Regulator ON/OFF Control 2
Voltage Regulator Power Input
DC/DC Power Input
DC/DC Power Ground
DC/DC Inductor Pin
DC/DC Output Voltage
DC/DC Analog Ground
DC/DC ON/OFF Control
Voltage Regulator ON/OFF Control 1
Voltage Regulator Ground
Voltage Regulator Output Voltage 1
2/43


Part Number XCM520
Description 600mA Synchronous Step-Down DC/DC Converter Dual LDO Regulator
Maker Torex Semiconductor
Total Page 30 Pages
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