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PDF XCM520 Data sheet ( Hoja de datos )
| Número de pieza | XCM520 | |
| Descripción | 600mA Synchronous Step-Down DC/DC Converter Dual LDO Regulator | |
| Fabricantes | Torex Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de XCM520 (archivo pdf) en la parte inferior de esta página. Total 43 Páginas | ||
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XCM520 Series
www.DataSheet4U.com
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
: 0.42Ω P-channel MOS Built-in
Switching Transistor : 0.52Ω N-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
1 page  
XCM520
www.DataSheet4US.coemries
ELECTRICAL CHARACTERISTICS
XCM520AB, AD (DC/DC BLOCK)
VOUT3 = 1.8V, fOSC=1.2MHz, Ta = 25℃
PARAMETER
SYMBOL
CONDITIONS
MIN. TYP. MAX. UNITS CIRCUIT
Output Voltage
Operating Voltage Range
VOUT3
VIN2
When connected to external components,
VIN2 = VEN3 =5.0V, IOUT3 =30mA
1.764
2.7
1.800 1.836
- 6.0
V
V
Maximum Output Current
UVLO Voltage
IOUT3MAX
VUVLO
When connected to external components,
VIN2=VOUT(E)+2.0V, VEN3=1.0V (*8)
VEN3=VIN2, VOUT3=0V,
Voltage which Lx pin holding “L” level (*1, *10)
600 -
-
1.00 1.40 1.78
mA
V
Supply Current
IDD
VIN2=VEN3=5.0V,
VOUT3 =VOUT3(E) 1.1V
XCM520AB
XCM520AD
-
22 50
15 33
A
Stand-by Current
ISTB VIN2 = 5.0V, VEN3 = 0V, VOUT3 = VOUT3(E) 1.1V
- 0 1.0 A
Oscillation Frequency
fOSC
PFM Switching Current
IPFM
PFM Duty Limit
Maximum Duty Ratio
Minimum Duty Ratio
Efficiency (*2)
DTYLIMIT_PFM
DMAX
DMIN
EFFI
Lx SW "H" ON Resistance 1
Lx SW "H" ON Resistance 2
Lx SW "L" ON Resistance 1
Lx SW "L" ON Resistance 2
Lx SW "H" Leak Current (*5)
Lx SW "L" Leak Current (*5)
Current Limit (*9)
Output Voltage
Temperature
Characteristics
RL H
RL H
RL L
RL L
ILEAKH
ILEAKL
ILIM
VOUT3/
(VOUT3 topr)
CE "H" Level Voltage
VEN3H
CE "L" Level Voltage
CE "H" Current
CE "L" Current
Soft Start Time
VEN3L
IEN3H
IEN3L
tSS
Integral Latch Time
Short Protection
Threshold Voltage
tLAT
VSHORT
When connected to external components,
VIN2 = VOUT3(E) + 2.0V, VEN3 = 1.0V, IOUT3 = 100mA
When connected to external components,
VIN2 = VOUT3(E) + 2.0V, VEN3 = VIN2 , IOUT3 = 1mA (*11)
VEN3 = VIN2 = (C-1) IOUT3 = 1mA (*11)
VIN2 = VEN3 = 5.0V, VOUT3 = VOUT3 (E) 0.9V
VIN2 = VEN3 = 5.0V, VOUT3 = VOUT3 (E) 1.1V
When connected to external components,
VEN3=VIN2=VOUT3(E)+1.2V,IOUT3= 100mA (*7)
VIN2 = VEN3 = 5.0V, VOUT3 = 0V, ILX = 100mA (*3)
VIN2 = VEN3 = 3.6V, VOUT3 = 0V, ILX = 100mA (*3)
VIN2 = VEN3 = 0V (*4)
VIN2 = VEN3 = 3.6V (*4)
VIN2 = VOUT3 = 5.0V, VEN3 = 0V, LX = 0V
VIN2 = VOUT3 = 5.0V, VEN3 = 0V, LX= 5.0V
VIN2 = VEN3 = 5.0V, VOUT3 = VOUT3 (E) 0.9V
VOUT3 = 30mA
-40 Topr
85
1020
120
100
-
-
-
-
-
-
-
-
900
-
VOUT3= 0V, Applied voltage to VEN3,
Voltage changes Lx to “H” level (*10)
VOUT3=30V, Applied voltage to VEN3,
Voltage changes Lx to “L” level (*10)
VIN2 = VEN3 = 5.0V, VOUT3 = 0V
VIN2 = 5.0V, VEN3 = 0V, VOUT3 = 0V
When connected to external components,
VEN3 = 0V
VIN2 , VOUT3 = 1mA
VIN2 = VEN3 = 5.0V, VOUT3 = 0.8
Short Lx at 1Ω resistance (*6)
VOUT3 (E)
Sweeping VOUT3, VIN2 = VEN3 = 5.0V, Short Lx at
1Ω resistance, VOUT3 voltage which Lx becomes “L”
level within 1ms
0.65
VSS
- 0.1
- 0.1
0.5
1.0
0.675
1200
160
200
-
-
92
0.35
0.42
0.45
0.52
0.01
0.01
1050
100
-
-
-
1.0
-
0.900
1380 kHz
200
300
-
0
-
0.55
0.67
0.66
0.77
1.0
1.0
1350
mA
%
%
%
%
A
A
mA
- ppm/
6.0
0.25
0.1
0.1
2.5
20.0
V
V
A
A
ms
ms
1.125 V
Test conditions: Unless otherwise stated, VIN2 = 5.0V, VOUT3 (E) = Nominal voltage
NOTE:
*1: Including hysteresis width of operating voltage.
*2: EFFI = { ( output voltage output current ) ( input voltage input current) } 100
*3: ON resistance ( )= (VIN2 - Lx pin measurement voltage) 100mA
*4: Design value
*5: When temperature is high, a current of approximately 10 A (maximum) may leak.
*6: Time until it short-circuits VOUT3 with GND via 1 of resistor from an operational state and is set to Lx=0V from current limit pulse
generating.
*7: VOUT3(E)+1.2V<2.7V, VIN2=2.7V.
*8: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.
If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.
*9: Current limit denotes the level of detection at peak of coil current.
*10: "H" VIN2 VIN2 - 1.2V, "L" + 0.1V - 0.1V
*11: XCM520A/B series exclude IPFM and DTYLIMIT_PFM because those are only for the PFM control’s functions.
*The electrical characteristics above are when the voltage regulator block is in stop.
5/43
5 Page 
XCM520
www.DataSheet4US.coemries
OUTPUT VOLTAGE CHART
Voltage Chart 1
NOMINAL OUTPUT
VOLTAGE
OUTPUT VOLTAGE (V)
(V)
VOUT(T)
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
2.10
2.15
2.20
2.25
2.30
2.35
2.40
2.45
2.50
2.55
2.60
2.65
2.70
2.75
2.80
2.85
2.90
2.95
MIN.
0.770
0.820
0.870
0.920
0.970
1.020
1.070
1.120
1.170
1.220
1.270
1.320
1.370
1.420
1.470
1.519
1.568
1.617
1.666
1.715
1.764
1.813
1.862
1.911
1.960
2.009
2.058
2.107
2.156
2.205
2.254
2.303
2.352
2.401
2.450
2.499
2.548
2.597
2.646
2.695
2.744
2.793
2.842
2.891
VOUT
MAX.
0.830
0.880
0.930
0.980
1.030
1.080
1.130
1.180
1.230
1.280
1.330
1.380
1.430
1.480
1.530
1.581
1.632
1.683
1.734
1.785
1.836
1.887
1.938
1.989
2.040
2.091
2.142
2.193
2.244
2.295
2.346
2.397
2.448
2.499
2.550
2.601
2.652
2.703
2.754
2.805
2.856
2.907
2.958
3.009
E-1
DROPOUT VOLTAGE 1 (mV)
Vdif1
TYP.
MAX.
300 700
E-2
DROPOUT VOLTAGE 2 (mV)
TYP.
Vdif2
MAX.
400 800
200 600 350 700
100 500 270 600
80 400 240 500
65 300 200 400
60 200 180 300
55 100 165 250
50 75 150 200
45 65 140 180
40 60 120 170
35 55 110 160
11/43
11 Page | ||
| Páginas | Total 43 Páginas | |
| PDF Descargar | [ Datasheet XCM520.PDF ] | |
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