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PDF XC9101 Data sheet ( Hoja de datos )

Número de pieza XC9101
Descripción PWM Controlled Step-Up DC/DC Controller
Fabricantes Torex Semiconductor 
Logotipo Torex Semiconductor Logotipo



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No Preview Available ! XC9101 Hoja de datos, Descripción, Manual

XC9101 Series
PWM Controlled Step-Up DC/DC Controller
ETR0403_006
GENERAL DESCRIPTION
The XC9101 series are step-up multiple current and voltage feedback DC/DC controller ICs. Current sense, clock
frequencies and amp feedback gain can all be externally regulated.
A stable power supply is possible with output currents of up to 1.5A.
With output voltage fixed internally, VOUT is selectable in 0.1V increments within a 2.5V ~ 16.0V range (±2.5%).
For output voltages outside this range, we recommend the FB version, which has a 0.9V internal reference voltage. Using this
version, the required output voltage can be set using 2 external resistors.
Switching frequency can also be set externally within a range of 100 ~ 600 kHz and therefore a frequency suited to your
particular application can be selected.
With the current sense function, peak currents (which flow through the driver transistor and the coil) can be controlled.
Soft-start time can be adjusted using external resistor and capacitor.
During shutdown (CE pin=L), consumption current can be reduced to as little as 0.5μA (TYP.) or less.
APPLICATIONS
E-book Reader / Electronic dictionaries
Portable game consoles
Mobile devices / terminals
Digital still cameras / Camcorders
Smart phones / Mobile phones
Note PCs / Tablet PCs
TYPICAL APPLICATION CIRCUIT
FEATURES
Stable Operations via Current & Voltage
Multiple Feedback
Unlimited Options for Peripheral Selection
Current Protection Circuit
Ceramic Capacitor Compatible
Input Voltage Range : 2.5V ~ 20V
Output Voltage Range : 2.5V ~ 16V
(Fixed Voltage Type)
: 30V + (Adjustable Type)
Oscillation Frequency Range
: 100 kHz ~ 600kHz
Output Current
: Up to 1.5A
Operating Ambient Temperature:-40℃~+85
Packages
: MSOP-8A
Environmentally Friendly : EU RoHS Compliant, Pb Free
TYPICAL PERFORMANCE
CHARACTERISTICS
VOUT=5.0V, fOSC=180 kHz
1/21

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XC9101 pdf
XC9101
Series
ELECTRICAL CHARACTERISTICS (Continued)
XC9101C50AKR
PARAMETER
Output Voltage
Maximum
Operating Voltage
Minimum
Operating Voltage
Supply Current 1
Supply Current 2
Stand-by Current
CLK
Oscillation Frequency
Frequency
Line Regulation
Frequency
Temperature Fluctuation
Maximum Duty Cycle
Minimum Duty Cycle
Current Limit Voltage
ISEN Current
CE "High" Current
CE "Low" Current
CE "High" Voltage
CE "Low" Voltage
EXT "High"
ON Resistance
EXT "Low"
ON Resistance
Efficiency (*1)
Soft-Start Time
CC/GAIN Pin
Output Impedance
SYMBOL
VOUT
VINMAX
VINMIN
IDD1
IDD2
ISTB
fOSC
ΔfOSC
ΔVINfOSC
ΔfOSC
ΔToprfOSC
DMAX
DMIN
ILIM
IISEN
ICEH
ICEL
VCEH
VCEL
REXTH
REXTL
EFFI
tSS
RCCGAIN
CONDITIONS
IOUT=300mA
MIN.
4.875
TYP.
5.000
MAX.
5.125
UNITS
V
Ta=25
CIRCUITS
20 - -
V
- - 2.5 V
VIN=3.0V, VOUT=CE=
Setting Output Voltage×0.95V
VIN=3.0V, CE=VIN
VOUT=Setting Output Voltage×1.05V
VIN=3.0V, CE=VOUT=VSS
160 270
90 176
0.5 2.0
μA
μA
μA
RT=10.0k, CT=220pF
280 330 380 kHz
VIN=2.5V20V
VIN=2.5V
Topr=-40+85
VOUT=Setting Voltage×0.95V
VOUT=Setting Voltage×1.05V
VIN pin voltageISEN pin voltage
VIN=3.0V, ISEN=3.0V
CE=VIN=3.0V, VOUT=0V
CE=0V, VIN=3.0V, VOUT=0V
CLK Oscillation Starts,
VOUT=0V, CE: Voltage applied
CLK Oscillation Stops,
VOUT=0V, CE: Voltage applied
EXT=VIN0.4V, CE=VIN=3.0V
VOUT=Setting voltage×0.95V
EXT=0.4V, CE=VIN=3.0V
VOUT=Setting voltage×1.05V
Connect CSS and RSS,
CE: 0V3.0V
- ±5
- ±5
79 85 89
-- 0
90 150 220
4.5 7 13
-0.1 0 0.1
-0.1 0 0.1
0.6 - -
- - 0.2
27 51
25 37
87
5
400
%
%
%
%
mV
μA
μA
μA
V
V
Ω
Ω
%
ms
kΩ
NOTE: Unless otherwise stated, VIN = 3.0V.
*1: EFFI = {[(output voltage) × (output current)] ÷ [(input voltage) × (input current)]} × 100
*2: The capacity range of the capacitor used to set the external CLK frequency is 150 ~ 220pF
5/21

5 Page





XC9101 arduino
XC9101
Series
OPERATIONAL EXPLANATION (Continued)
Functional Settings (Continued)
2. Oscillation Frequency
The oscillation frequency of the internal clock generator is approximated by the following equation according to the values
of the capacitor and resistor attached to the CLK pin. To stabilize the IC's operation, set the oscillation frequency within a
range of 100kHz to 600kHz. Select a value for Cclk within a range of 150pF to 220pF and fix the frequency based on the
value for Rclk.
f = 1/(-Cclk × Rclk × ln0.26)
Example: When Cclk = 220 pF and Rclk = 10 kΩ, f = 1 / (-220 x 10-12×10 x 103×ln(0.26)) = 337.43 kHz.
Rclk
CLK pin
Cclk
CLK Generator
3. Gain and Frequency Characteristics of the Verr Amplifier
The gain at output and frequency characteristics of the Verr amplifier are adjusted by the values of the capacitor and
resistor attached to the CC/GAIN pin. It is generally recommended to attach a CC of 220 to 1,000pF without RGAIN. The
greater the CC value, the more stable the phase and the slower the transient response. When using the IC with RGAIN
connected, it should be noted that if the RGAIN resistance value is too high, abnormal oscillation may occur during transient
response time. The size of RGAIN should be carefully evaluated before connection.
CC/GAIN pin
CC RGAIN
RVerr
Verr
VOUT/FB
Vref
4. Current Limit
The current limit value is approximated by the following equation according to resistor RSEN inserted between the VIN and
ISEN pins. Double function, current FB input and current limiting, is assigned to the ISEN pin. The current limiting value is
approximated by the following equation according to the value for RSEN.
ILpeak_limit = 0.15/RSEN
Example: When RSEN = 100 mΩ, ILpeak_limit = 0.15/0.1 = 1.5 A
Isen pin
Rsen
Limiter signal
VIN pin
Comparator with
150V offset
The inside error amplifier sends feedback signal when the voltage occurs at RSEN resistor because of the flow of coil
current in order to phase compensate. The more the RSEN value becomes larger, the more the error signal becomes
bigger, and it could lead to an intermittent oscillation. Please be careful if there is a problem with the application. Under
the regular operation, a voltage created by a peak coil current at the RSEN resistor should be set lower than the current limit
voltage 90 mV (MIN). For more details, please refer the notes on the external components.
11/21

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