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PDF XC9141 Data sheet ( Hoja de datos )
| Número de pieza | XC9141 | |
| Descripción | 0.8A Step-up DC/DC Converters | |
| Fabricantes | Torex Semiconductor | |
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XC9141/XC9142 Series
ETR04018-001
Load Disconnection Function, 0.8A Step-up DC/DC Converters
GENERAL DESCRIPTION
GreenOperation-compatible
XC9141/XC9142 series are synchronous step-up DC/DC converters with a 0.3Ω(TYP.) N-channel driver transistor and a
0.3Ω(TYP.) synchronous P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 0.8A
by reducing ON resistance of the built-in transistors.
The series are able to start operation under the condition which has 0.9V input voltage to generate 3.3V output voltage with a
100Ω load resistor, suitable for mobile equipment using only one Alkaline battery or one Nickel metal hydride battery.
The output voltage can be set from 1.8V to 5.5V (±2.0%) in steps of 0.1V.With the built-in oscillator, either 1.2MHz or 3.0MHz can
be selected for suiting to your particular application.
During the devices enter stand-by mode, A, D types prevent the application malfunction by CL Discharge Function which can
quickly discharge the electric charge at the output capacitor (CL). B, E types is able to drive RTC etc. by Bypass Switch Function
to maintain continuity between the input and output. C, F types is able to connect in parallel with other power supplies by Load
Disconnection Function which breaks continuity between the input and output. * D, E, and F types are under development.
APPLICATIONS
Portable equipment
Beauty & health equipment
Wearable devices
Game & Hobby
PC Peripherals
Devices with 1~3 Alkaline,
1~3 Nickel Hydride, 1 Lithium and 1 Li-ion
FEATURES
Input Voltage Range
Fixed Output Voltage
Oscillation Frequency
Input Current
Output Current
Control Mode Selection
Load Transient Response
Protection Circuits
Functions
Output Capacitor
Operating Ambient Temperature
Package
Environmentally Friendly
: 0.65V 6.0V
: 1.8V 5.5V (0.1V increments)
: 1.2MHz (±15%), 3.0MHz (±20%)
: 0.8A
: 500mA @VOUT=5.0V, VBAT=3.3V (TYP.)
350mA @VOUT=3.3V, VBAT =1.8V (TYP.)
: PWM (XC9141 Series) or
Auto PWM/PFM (XC9142 Series)
: 100mV
@VOUT=3.3V, VBAT =1.8V,IOUT=1mA→200mA
: Over-current limit
Integral latch method (D,E,F type)
Output short-circuit protection (D,E,F type)
: Soft-start
Load Disconnection Function (A,C,D,F type)
CL Auto Discharge Function (A,D type)
Bypass Switch Function (B,E type)
: Ceramic Capacitor
: -40 +85
: SOT-25,USP-6C,WLP-6-01
: EU RoHS Compliant, Pb Free
* D, E, and F types are under development.
TYPICAL APPLICATION CIRCUIT
TYPICAL PERFORMANCE
CHARACTERISTICS
XC9141A33C / XC9142A33C
L=4.7μH(LQH5BPN4R7NT0L)
CIN=10μF(GRM188R60J106M),CL=10μF(GRM188R60J106M)
L=4.7μH
Lx
VOUT
CE CE
VB AT
BAT GND
CIN =10μF
VOUT
CL=10μF
100
90
80
70
60
50
40
30
20
10
0
0.1
VBAT=0.9V
VBAT=1.2V
VBAT=1.8V
VBAT=2.5V
solid line : XC9141
dotted line : XC9142
1 10 100
Output Current : IOUT [mA]
1000
1/30
1 page  
ELECTRICAL CHARACTERISTICS
XC9141/XC9142 Series
PARAMETER
Input Voltage
Output Voltage
Operation Start Voltage
Operation Hold Voltage
Quiescent Current
(XC9142)
Supply Current
Oscillation Frequency
Maximum Duty Cycle
Minimum Duty Cycle
PFM Switching Current
Efficiency
XC9142
Efficiency
Stand-by Current
Lx SW "Pch" ON
Resistance
Lx SW "Nch" ON
Resistance
Lx SW”H” Leakage
Current
Lx SW”L” Leakage
Current XC9142C
Current Limit
SYMBOL
CONDITIONS
VBAT
VOUT
VST1
VHLD
Voltage to start oscillation while
VOUT=VOUT(T) ×1.03→VOUT(T) ×0.97
RL=1kΩ
RL=1kΩ
Iq
IDD
fOSC
DMAX
DMIN
IPFM
EFFI
EFFI
ISTB
VOUT=VBAT= VOUT(T)+0.5V
fOSC=1.2MHz
fOSC=3.0MHz
VOUT=VBAT= VOUT(T)-0.2V
fOSC=1.2MHz
fOSC=3.0MHz
VBAT= VOUT(T)×0.5
IOUT=100mA
fOSC=1.2MHz
fOSC=3.0MHz
VBAT=1.2V,
VOUT= VOUT(T)-0.2V
fOSC=1.2MHz
fOSC=3.0MHz
VOUT=VBAT= VOUT(T)+0.5V
VBAT=1.5V,
RL is selected with VOUT(T), Refer to Table 1.
VBAT= VOUT(T)×0.6,
RL is selected with VOUT(T), Refer to Table 1.
VBAT= VOUT(T)×0.6, IOUT= 100mA
VBAT=VLx=6.0V,VCE=0.0V(*1)
A,B Type
C Type
MIN.
-
<E-1>
-
-
-
-
-
-
1.02
2.40
85
88
-
-
-
-
-
-
RLXP
VBAT=VLx= 6.0V, IOUT=200mA
-
RLXN
ILXLH
ILXLL
ILIM
-
VBAT=6.0V,VCE=0.0V,
VLx=6.0V(*1)
A,B Type
C Type
-
VBAT=0.0V,VCE=0.0V,VLx=0.0V,VOUT=6.0V
-
VBAT= VOUT(T)-0.2V, RLx=1Ω
<E-6>
TYP.
-
<E-2>
-
0.65
17.0
26.0
<E-4>
<E-5>
1.20
3.00
93
93
-
165
86(*3)
90(*3)
0.0
1.0
0.3(*2)
0.3(*3)
0.0
0.0
<E-7>
XC9141/XC9142
Series
MAX.
6.0
Ta=25
UNITS CIRCUIT
V
<E-3>
V
0.90
-
30.0
40.0
1.500
3.000
1.38
3.60
98
98
0
V
V
μA
mA
MHz
%
%
230 mA
-
%
-
1.0
μA
2.4
-Ω
-Ω
1.0 μA
1.0
<E-8>
μA
A
5/30
5 Page 
XC9141/XC9142
Series
OPERATIONAL EXPLANATION (Continued)
<Maximum current limit function, short-circuit protection>
The maximum current limit function of XC9141A/B types and XC9142A/B/C types constantly monitors the current flowing in the N-channel driver
transistor connected to the Lx pin, and if the current in the N-channel driver transistor exceeds the current limit, the function turns off the N-channel
driver transistor. (Please refer to Fig. ILIM)
If the current flowing in the N-channel driver transistor exceeds the current limit value (equivalent to the peak coil current), the N-channel
driver transistor turns off, and remains off during the clock interval.
At the next clock, the N-channel driver transistor turns on.
If overcurrent continues, and are repeated.
Note that the current in the internal N-channel driver transistor is not the same as the output current IOUT.
VBAT
VOUT
ILx
RL
CE
VOUT(T)
ILIM
<CL Discharge>
The XC9141A type and XC9142A type can discharge the electric charge at the output capacitor (CL) when a low signal to the CE pin which
enables a whole IC circuit put into OFF state, is inputted via the N-channel transistor located between the VOUT pin and the GND pin. When the IC
is disabled, electric charge at the output capacitor (CL) is quickly discharged so that it may avoid application malfunction. Discharge time of the
output capacitor (CL) is set by the CL auto-discharge resistance (R) and the output capacitor (CL). By setting time constant of a CL auto-discharge
resistance value [RDCHG] and an output capacitor value (CL) as ( = CL x RDCHG), discharge time of the output voltage after discharge via the N
channel transistor is calculated by the following formulas. However, the CL discharge resistance [RDCHG] is depends on the VBAT or VOUT, so it is
difficult to make sure the discharge time. We recommend that you fully check actual performance.
V = VOUT x e -t / or t = x ln (VOUT / V)
V
VOUT(T)
t
CL
RDCHG
: Output voltage after discharge
: Target voltage
: Discharge time
: CL×RDCHG
: Capacitance of Output capacitor (CL)
: CL Discharge resistance, it depends on supply voltage
Output Voltage Discharge characteristics
RDCHG = 180Ω(TYP) CL=10μF
VOUT(T) = 5.5V,VBAT=2.0V
VOUT(T) = 3.3V,VBAT=2.0V
VOUT(T) = 1.8V,VBAT=1.0V
<Bypass switch>
At shutdown, XC9141B type and XC9142B type conduct between the BAT pin and VOUT pin by means of a bypass switch. If the output is shorted
to ground, the current is limited by the resistance (RBSW) of the bypass switch.
11/30
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet XC9141.PDF ] | |
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