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PDF XC9210 Data sheet ( Hoja de datos )
| Número de pieza | XC9210 | |
| Descripción | Synchronous Step-Down DC / DC Controller ICs | |
| Fabricantes | Torex Semiconductor | |
| Logotipo |  |
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XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
ETR0504_001
☆GO-Compatible
■GENERAL DESCRIPTION
The XC9210 is a synchronous PWM, PWM/PFM controller designed for low voltage step-down DC/DC converter applications.
High efficiency is obtained through the use of a synchronous rectification topology. Efficiencies are maximized by using the low
RDSon N-Channel MOSFET switch which replaces the catch diode used in standard buck circuits.
The operation of the XC9210 series can be switched between PWM and PWM/PFM externally using the MODE pin. In
PWM/PFM mode the XC9210 automatically switches from PWM to PFM during light loads and high efficiencies can be
achieved over a wide range of load conditions.
Output noise is reduced in PWM operation as the frequency is fixed.
The XC9210 has an 0.9V (±2.0%) internal voltage, and using externally connected components, the output voltage can be set freely
between 0.9V to 6.0V. With an internal switching frequency of 300kHz and 180kHz (custom) smaller, low cost external
components can also be used.
Soft-start time is internally set to 10msec offering protection against in-rush currents during start-up and preventing voltage overshoot.
■APPLICATIONS
●PDAs
●Palmtop computers
●Portable audios
●Various power supplies
■FEATURES
Input Voltage Range
: 2.0V ~ 10V
Output Voltage Range
: 0.9V ~ 6.0V
Can be set freely with 0.9V
(±2.0%) of reference
Oscillation Frequency
: 300kHz ±15%
(180kHz as custom)
Output Current
: More than 2A
(VIN = 5.0V, VOUT=3.3V)
Stand-By Function
: 3.0μA (MAX.)
Soft-start internally set-up : 10 ms (internally set-up)
Synchronous Step-Down DC/DC Controllers
Maximum Duty Cycle
: 100% (TYP.)
PWM and PWM/PFM Externally Selectable
Synchronous Rectification Control
High Efficiency
: 95% (TYP.)
Package
: MSOP-8A
■TYPICAL APPLICATION CIRCUIT
<XC9210B093K OUTPUT=3.3V>
■TYPICAL PERFORMANCE
CHARACERISTICS
Efficiency vs. Output Current
Tr1:Pch MOSFET
:CPH3308
PWM
CE
VIN:3.3V~10V
CIN:47μF
EXT1
VDD
PWM
CE
L:22μH
CDRH125
Tr2:Nch MOSFET
:CPH3408
VOUT:3.3V
EXT2
GND
FB
MODE
CFB
:62pF
RFB1
:200kΩ
CL:
47μFX2
MODE
RFB
:75kΩ
1/12
1 page  
XC9210
Series
■ ELECTRICAL CHARACTERISTICS (Continued)
XC9210B092
(FOSC = 180kHz)
Ta=25℃
PARAMETER
SYMBOL
CONDITIONS
MIN. TYP. MAX. UNITS CIRCUIT
Supply Voltage
Maximum Input Voltage
Output Voltage Range (*1)
Supply Current 1
Supply Current 2
Stand-by Current
Oscillation Frequency
FB Voltage
Minimum Operation Voltage
Maximum Duty Ratio
Minimum Duty Ratio
PFM Duty Ratio
Efficiency1 (*2)
Soft-Start Time
EXT1 "High" ON Resistance
EXT1 "Low" ON Resistance
EXT2 "High" ON Resistance
EXT2 "Low" ON Resistance
PWM "High" Voltage
PWM "Low" Voltage
MODE "High" Voltage
MODE "Low" Voltage
CE "High" Voltage
CE "Low" Voltage
PWM "High" Current
PWM "Low" Current
MODE "High" Current
MODE "Low" Current
CE "High" Current
CE "Low" Current
FB "High" Current
VDD
VIN
VOUTSET
IDD1
IDD2
ISTB
FOSC
VFB
VINmin
MAXDTY
MINDTY
PFMDTY
EFFI
TSS
REXTBH1
REXTBL1
REXTBH2
REXTBL2
VPWMH
VPWML
VMODEH
VMODEL
VCEH
VCEL
IPWMH
IPWML
IMODEH
IMODEL
ICEH
ICEL
IFBH
MODE = 0V
MODE = 0V
VIN≧2.0V, MODE = 0V,
IOUT=1mA
FB = 0V
FB = 1.0V
Same as IDD1, CE = 0V
Same as IDD1
VIN=3.0V, IOUT=10mA
VOUT
Same as IDD1
Same as IDD2
No Load, VPWM=0V
IOUT1=300mA (*3)
VOUT1×0.95V, CE=0V→0.65V
CE1 = 0, EXT1= VDD - 0.4V
FB = 0V, EXT1 = 0.4V
EXT2 = VDD - 0.4V
CE = 0V, EXT2 = VDD - 0.4V
No Load
No Load
No Load
No Load
FB = 0V
FB = 0V
PWM=0V
MODE = 0V
CE = 0V
2.0 - 10.0
10.0 -
-
0.9 - VIN
- 45 105
- 45 105
- - 3.0
153 180 207
0.882 0.900 0.918
- - 2.0
100 -
-
- -0
22 30 38
- 96 -
5.0 10.0 20.0
- 26 37
- 19 30
- 23 31
- 19 30
0.65 -
-
- - 0.20
0.65 -
-
- - 0.20
0.65 -
-
- - 0.20
- - 0.50
- - - 0.50
- - 0.50
- - - 0.50
- - 0.50
- - - 0.50
- - 0.50
FB "Low" Current
IFBL FB = 1.0V
- - - 0.50
Unless otherwise stated, VDD = 3.0V, CE = 3.0V, PWM = 3.0V, FB = 3.0V, EXT1,2 = OPEN, MODE = 3.0V, VIN=4.2V
V
V
V
μA
μA
μA
kHz
V
V
%
%
%
%
ms
Ω
Ω
Ω
Ω
V
V
V
V
V
V
μA
μA
μA
μA
μA
μA
μA
μA
①
①
①
②
②
②
②
③
①
②
②
④
④
④
⑤
⑤
⑤
⑤
④
④
④
④
②
②
②
②
②
②
②
②
②
②
NOTE: *1 : Please be careful not to exceed the breakdown voltage level of the peripheral parts.
*2 : EFFI={ [ (output voltage) x (output current) ] / [ (input voltage) x (input current) ] } x 100
*3 : Tr1: CPH3308
(SANYO)
Tr2: CPH3408
(SANYO)
L: 22μH
(CDRH125, SUMIDA)
CL: 16V, 47μF x 2 (Tantalum MCE Series, NICHICEMI)
CIN: 16V, 47μF
(Tantalum MCE Series, NICHICEMI)
RFB1: 200kΩ
RFB2: 75kΩ
CFB: 62pF
5/12
5 Page 
■ PACKAGING INFORMATION
●MSOP-8A
XC9210
Series
■ MARKING RULE
●MSOP-8A
① Represents product series
MARK
5
② Represents type of DC/DC Controller
MARK
B
PRODUCT SERIES
XC9210B09xKx
PRODUCT SERIES
XC9210B09xKx
MSOP-8A
(TOP VIEW)
③,④ Represents FB voltage
MARK
③
0
④
9
VOLTAGE
（V）
0.9
PRODUCT SERIES
XC9210B09xKx
⑤ Represents oscillation frequency
MARK
2
3
OSCILLATION FREQUENCY (kHz)
180 (Custom)
300
PRODUCT SERIES
XC9210B092Kx
XC9210B093Kx
⑥ Represents production lot number
0 to 9,A to Z repeated (G, I, J, O, Q, W excepted)
Note: No character inversion used.
11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet XC9210.PDF ] | |
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