XCM520 Datasheet, PDF (1/43 Pages) Torex Semiconductor – 600mA Synchronous Step-Down DC/DC Converter + Dual LDO Regulator

XCM520 Series
ETR2427-002a
600mA Synchronous Step-Down DC/DC Converter + Dual LDO Regulator
˙GENERAL DESCRIPTIONç
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 0.42ЊP-channel MOS and a 0.52ЊN-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.
˙APPLICATIONSç
˔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
: 0.42Ω P-channel MOS Built-in
Switching Transistor : 0.52Ω N-channel MOS Built-in
Input Voltage Range : 2.7V ʙ 6.0V
Output Voltage Range : 0.8V ʙ 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.
<Dual LDO Regulator Block>
Maximum Output Current : 150mA (Limiter 300mA TYP.)
˙TYPICAL APPLICATION CIRCUITç ^{Dropout Voltage}
: 100mV @ 100mA
Operating Voltage Range : 1.5V~6.0V
V_OUT1
1.8V
C_L2
1μF
C_IN1
1μF
1 V_OUT2
2 EN2
3 V_IN1
V_OUT1 12
V_SS 11
EN1 10
V_OUT2
1.2V
C_L1
1μF
Output Voltage Range : 0.8V~5.0V (0.05V increments)
High Accuracy
: ±2% (V_OUT>1.5V)
±30mV (V_OUTʽ1.5V)
Low Power Consumption : 25ЖA (TYP.)
Stand-by Current
: Less than 0.1ЖA(TYP.)
High Ripple Rejection : 70dB @1kHz
V_IN
3.3V
C_IN2
4.7μF
4 V_IN2
5 PGND
EN3 9
AGND 8
6 L_x
V_OUT3 7
L
1.5μH
C_L3
10μF
V_OUT3
2.3V
Low Output Noise
Operating Temperature Range : -40ˆ~+85ˆ
Low ESR Capacitor : Ceramic Capacitor Compatible
Package
: USP-12B01
Standard Voltage Combinations : V_OUT1
V_OUT2
V_OUT3
XCM520xx01D
1.8V
1.2V
2.3V
XCM520xx02D
1.8V
1.3V
2.3V
XCM520xx03D
1.8V
1.2V
2.2V
* 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 V_OUT3 is connected to the dual LDO regulator
V_IN1 in this connection.
* Also, it is possible to operate two V_IN independently.
XCM520xx04D
1.8V
1.2V
XCM520xx05D
1.0V
1.2V
XCM520xx06D
0.8V
1.5V
*Other combinations are available as semi-custom products.
Environmentally Friendly : EU RoHS Compliant, Pb Free
2.8V
1.8V
1.8V
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