XC9120/XC9121/XC9122 Series
ETR0409 002
Step-Up DC/DC Controller IC, MAXDUTY: 93%
☆GO-Compatible
■GENERAL DESCRIPTION
XC9120/9121/9122 Series are PWM, PWM/PFM auto/external switching controlled step-up DC/DC converter controller ICs.
Since maximum duty ratio is as large as 93%, the series is the best for the applications used as high step-up ratios, such as
the LCD panels and OLED. In this series, even if it is a high step-up ratio, the output voltage stabilized at high efficiency can
be obtained. With 0.9V (±2.0%) of reference voltage supply internal, and using external resistors, RFB1 and 2, output
voltage can be set up freely within a range of 1.5V to 30V. For a current sense, with the use of RSENSE, ceramic capacitors
can be used as load capacitors and allows for lower output ripple and reduced PCB area requirements.
Control automatically switches from PWM to PFM during light loads with the XC9121 series and the XC9122 series can
switch the control from PWM to PFM using external signals depending on the circuit conditions..
During stand-by (when the CE pin is low), all circuits are shutdown to reduce current consumption to as low as 1.0μA or less.
The overcurrent limit circuit of this IC is designed to monitor the ripple voltage of the FB pin and operates the IC to stop when
the ripple voltage runs over 250mV. The IC resumes its operation with a toggle of the CE pin or by turning the power supply
back on.
■FEATURES
■APPLICATIONS
Input Voltage Range : 0.9V~6.0V
Operating Voltage Range : 1.8V~6.0V
Output Voltage Range : 1.5V~30V (externally set)
Reference voltage 0.9V (±2.0%)
Oscillation Frequency : 100kHz (±15%)
Output Current
: ≥80mA (VIN=3.6V, VOUT=15V)*
Control
: XC9120 (PWM)
: XC9121 (PWM/PFM Automatic)
: XC9122 (PWM/PFM Externally)
High Efficiency
: 85% (TYP.)
: (VIN=3.6V, VOUT=15V,
IOUT=10mA)*
Stand-by Function
: ISTB=1.0μA (MAX.)
Load Capacitors
: Low ESR capacitor compatible
Current Limiter
: Operates when ripple is 250mV
Maximum Duty Ratio : 93% (TYP.) for High Step-up Ratio
Package
: SOT-25, USP-6C
●Power Supply for the LCDs.
●High Step-Up Ratio Equipment (OLED, etc.)
* When using external components showing in the circuit below.
■TYPICAL APPLICATION CIRCUIT
■TYPICAL PERFORMANCE
CHARACTERISTICS
XC9122D091 (100kHz, 15.0V)
SD:
XB01SB04A2
RSENSE: 50mΩ
for Ceramic CL
L=47uH(CDRH5D28),SD:XB01SB04A2
CL=40uF(Ceramic),Tr:161A11A1
L: 47uH
100
4.2V
VOUT=15V
RFB1:
470kΩ RFB2: 30kΩ
1
Ceramic CL:
10uF x 4
5
2
3
CE
4
Nch Power
MOS FET
XP161A1355
CIN
VIN=
2.7V~4.2V
Efficiency: EFFI(%)
CFB: 33pF
PWM/PFM
80
VIN=2.7V
60
3.2V
3.6V
PWM
40
20
0
0.1
1
10
100
Output Current: IOUT(mA)
1/17
XC9120/XC9121/XC9122 Series
■PIN CONFIGURATION
EXT
GND
55
44
1
22
33
FB
VDD
CE
* The dissipation pad for the
USP-6C package should be
solder-plated in recommended
mount pattern and metal masking
so as to enhance mounting strength
and heat release. If the pad needs
to be connected to other pins, it
should be connected to the VDD pin
(Pin #2).
USP-6C (BOTTOM VIEW)
SOT-25 (TOP VIEW)
■PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTION
6
FB
Output Voltage Setting Resistor Connection
2
VDD
Supply Voltage
CE
Chip Enable (Operates when "H" Level)
SOT-25
USP-6C
1
2
3
4
CE (/PWM)
PWM/PFM Switch*
4
3
GND
Ground
5
1
EXT
External Transistor Drive Connection
-
5
NC
No Connection
* The XC9122 series combines the CE pin and PWM/PFM switch pin.
■FUNCTION
XC9120/9121 Series
CE PIN
IC OPERATIONAL STATE
H
Operation
L
Shut-Down
XC9122 Series
CE/PWM PIN
H
More than VDD - 0.2 (V)
M
0.65 ~ VDD – 1.0 (V)
L
0 ~ 0.2 (V)
IC OPERATIONAL STATE
Operation (PWM control)
Operation (PWM/PFM automatic switching control
Shut-Down
■ PRODUCT CLASSIFICATION
●Ordering Information
XC9120①②③④⑤⑥: PWM Control
XC9121①②③④⑤⑥: PWM/PFM Automatic Switching Control
XC9122①②③④⑤⑥: PWM/PFM Externally Switching Control
DESIGNATOR
DESCRIPTION
①
Type of DC/DC Controller
② ③
Output Voltage
④
Oscillation Frequency
2/17
⑤
Package
⑥
Device Orientation
SYMBOL
B
D
09
1
DESCRIPTION
: With current limiter
: No current limiter
: FB Voltage (ex. FB Voltage=0.9V→②=0, ③=9)
M
: 100kHz
: SOT-25 (SOT-23-5)
E
: USP-6C
R
: Embossed tape, standard feed
L
: Embossed tape, reverse feed
XC9120/XC9121/XC9122
Series
■ BLOCK DIAGRAM
■ ABSOLUTE MAXIMUM RATINGS
Ta=25℃
PARAMETER
SYMBOL
RATINGS
UNIT
VDD Pin Voltage
VDD
-0.3 ~ 12.0
V
FB Pin Voltage
VFB
-0.3 ~ 12.0
V
CE Pin Voltage
VCE
-0.3 ~ 12.0
V
EXT Pin Voltage
VEXT
-0.3 ~ VDD + 0.3
V
EXT Pin Current
IEXT
±100
mA
Power Dissipation
SOT-25
USP-6C
Pd
150
100
mW
Operating Temperature Range
Topr
-40 ~ +85
℃
Storage Temperature Range
Tstg
-55 ~ +125
℃
* Voltage is all ground standardized.
3/17
XC9120/XC9121/XC9122 Series
■ELECTRICAL CHARACTERISTICS
XC9120B091, XC9121B091, XC9122B091
XC9120D091, XC9121D091, XC9122D091
PARAMETER
SYMBOL
FB Voltage
(FOSC=100kHz)
CONDITIONS
Ta=25℃
MIN.
TYP.
MAX.
UNIT
CIRCUIT
VFB
0.882
0.900
0.918
V
④
Supply Voltage Range
(*1)
VDD
1.8
-
6.0
V
①
Output Voltage Setting
Range
VOUTSET
1.5
-
30.0
V
②
Operation Start Voltage
VST1
-
-
0.9
V
③
Oscillation Start Voltage
(*1)
VST2
-
-
0.8
V
④
Operation Hold Voltage
VHLD
-
-
0.7
V
③
Supply Voltage 1
IDD1
Same as VST2, VDD=3.0V
-
25
50
μA
④
Supply Voltage 2
IDD2
Same as IDD1, FB=1.2V
-
13
30
μA
④
Stand-by Current
ISTB
Same as IDD1, CE=0V
-
-
1.0
μA
⑤
Oscillation Frequency
FOSC
Same as IDD1
85
100
115
kHz
④
Maximum Duty Ratio
MAXDTY
Same as IDD1
89
93
96
%
④
PFM Duty Ratio
PFMDTY
No Load (XC9121B/D, XC9122B/D types)
24
32
40
%
⑥
150
250
400
mV
⑥
-
85
-
%
①
5.0
10.0
20.0
ms
①
Recommended circuit using 2SD1628,
VIN=VOUTSET×0.6, VDD=3.0V,
IOUT=1.0mA
Recommended circuit using 2SD1628
VOUT=3.3V, IOUT=1.0mA
No external components,
CE connected to VDD, Voltage applied,
FB=0V
Recommended circuit using 2SD1628
VOUT=3.3V, IOUT=1.0mA
Over Current Sense
Voltage (*2)
VLMT
Step input to FB
(Pulse width: 2.0μs or more)
EXT= Low level voltage
(XC9120/9122/9122B type)
Efficiency (*3)
EFFI
IOUT=10mA
Soft-Start Time
TSS
CE "H" Voltage
VCEH
Same as IDD1
0.65
-
-
V
⑤
CE "L" Voltage
VCEL
Same as IDD1
-
-
0.20
V
⑤
EXT "H" ON Resistance
REXTH
Same as IDD1, VEXT=VOUT-0.4V
-
24
36
Ω
④
EXT "L" ON Resistance
REXTL
Same as IDD1, VEXT=0.4V
-
16
24
Ω
④
PWM ‘H’ Voltage (*4)
VPWMH
IOUT=1mA
(XC9122B/D type)
VDD-0.2
-
-
V
①
PWM ‘L’ Voltage (*4)
VPWML
IOUT=1mA
(XC9122B/D type)
-
-
VDD-1.0
V
①
CE "H" Current
ICEH
Same as IDD2, CE=VDD
-
-
0.1
μA
⑤
CE "L" Current
ICEL
Same as IDD2, CE=0V
-
-
-0.1
μA
⑤
FB "H" Current
IFBH
Same as IDD2, FB=VDD
-
-
0.1
μA
⑤
FB "L" Current
IFBL
Same as IDD2, FB=0V
-
-
-0.1
μA
⑤
Test Conditions: Unless otherwise stated, CL: ceramic, recommended MOSFET should be connected.
When VOUT is set at 15V, VIN=VDD=3.6V.
NOTE:
*1: Although the IC starts step-up operations from a VDD=0.8V, the output voltage and oscillation frequency are stabilized at VDD>1.8V.
Therefore, a VDD of more than 1.8V is recommended when VDD is supplied from VIN or other power sources.
*2: The overcurrent limit circuit of this IC is designed to monitor the ripple voltage so please select your external components carefully to
prevent VLMT being reached under low temperature conditions as well as normal operating conditions. Following current limiter circuit
operation, which in turn causes the IC’s operations to stop, the IC resumes its operation with a toggle of the CE pin or by turning the power
supply back on.
*3: EFFI: {(output voltage) x (output current)} / {(input voltage) x (input current)} x 100
*4: The XC9122 series’ CE pin combines PWM/PFM external switch pin. In the operation state, PWM control becomes effective when the CE
pin is more than VDD-0.2V. When the CE pin is less than VDD-1.0V and more than VCEH, PWM/PFM automatic switching control becomes
effective with 32% duty.
4/17
XC9120/XC9121/XC9122
Series
■ TYPICAL APPLICATION CIRCUIT
SD
RSENSE
CFB
VOUT
RFB1
RFB2
1
CL
5
Nch Power
MOS FET
CIN
VIN
RB
2
3
4
CB
CE
NPM Tr
When obtaining VDD from a source other than VIN (VOUT),
please insert a by-pass capacitor CDD between the VDD
pin and the GND pin in order to provide stable operations.
Please place CL and CIN as close as to the VOUT and VDD
pins respectively and also close to the GND pin.
Strengthen the wiring sufficiently.
RSENSE should be removed and shorted when the CL
capacitor except for ceramic or low ESR capacitor is
used.
Insert RB and CB when using a bipolar
NPN transistor.
5/17
XC9120/XC9121/XC9122 Series
■ OPERATIONAL EXPLANATION
The XC9120/9121/9122 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator,
phase compensation circuit, and current limiter circuit. The series ICs compare, using the error amplifier, the voltage of the
internal voltage reference source with the feedback voltage from the FB pin. Phase compensation is performed on the
resulting error amplifier output, to input a signal to the PWM comparator to determine the turn-on time during PWM operation.
The PWM comparator compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the
ramp wave circuit, and delivers the resulting output to the buffer driver circuit to cause the EXT pin to output a switching duty
cycle. This process is continuously performed to ensure stable output voltage.
<Error Amp.>
Error amplifier is designed to monitor the output voltage, comparing the feedback voltage (FB) with the reference voltage
Vref. In response to feedback of a voltage lower than the reference voltage Vref, the output voltage of the error amp.
decreases.
<OSC Generator>
The circuit generates the internal reference clock. The frequency is set to 100kHz (TYP.).
<Ramp Wave Generator>
The ramp wave generator generates a saw-tooth waveform based on outputs from the OSC Generator.
<PWM Comparator>
The PWM comparator compares outputs from the error amp. and saw-tooth waveform. When the voltage from the error
amp’s output is low, the external switch will be set to ON.
<PWM/PFN Comparator>
The circuit generates PFM pulses.
The XC9122 series can switch PWM control and PWM/PFM switching control by external signal. The PWM/PFM automatic
switching control becomes effective when the voltage of the CE pin is less than VDD-1.0V, and the control switches between
PWM and PFM automatically depending on the load. The PWM/PFM control turns into the PFM control when threshold
voltage becomes lower then voltage of error amps. The PWM control becomes effective when the CE pin voltage is more
than VDD-0.2V. Noise is easily reduced with the PWM control since the switching frequency is fixed. Because of this, the
series gives the best control suitable for your application.
<Vref with Soft Start>
The reference voltage, Vref (FB pin voltage) =0.9V, is adjusted and fixed by laser trimming (for output voltage settings, please
refer to the output voltage setting.). Soft-start circuit protects against inrush current, when the power is switched on, and
also protects against voltage overshoot. It should be noted, however, that this circuit does not protect the load capacitor (CL)
form inrush current. With the Vref voltage limited and depending on the input to the error amps, the operation maintains a
balance between the two inputs of the error amps and controls the EXT pin’s ON time so that it does not increase more than
is necessary.
<Enable Function>
The function controls the operation and shutdown of the IC. When the voltage of the CE pin is 0.2V or less, the mode will be
disable, the channel’s operations will stop and the EXT pin will be kept at a low level (the external N-ch MOSFET will be
OFF). When the IC is in a state of disable, current consumption will be no more than 1.0μA. When the CE pin’s voltage is
0.65V or more, the mode will be enabled and operations will recommence.
<Current Limiter Circuit>
The current limiter circuit of the XC9120 series is designed to monitor a ripple output voltage. Following current limiter
circuit operation, which in turn causes the IC’s operations to stop, the IC resumes its operation with a toggle of the CE pin or
by turning the power supply back on.
6/17
XC9120/XC9121/XC9122
Series
■ OPERATIONAL EXPLANATION (Continued)
<Output Voltage Setting>
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based
on the values of RFB1 and RFB2. The sum of RFB1 and RFB2 should normally be 2MΩ.
VOUT = 0.9 x (RFB1 + RFB2) / RFB2
The value of CFB1, speed-up capacitor for phase compensation, should result in fzfb = 1/(2×π×CFB×RFB1) equal to
15kHz. Adjustments are required between 5kHz to 30kHz depending on the application, value of inductance (L), and value
of load capacitance (CL).
ex.) Output Voltage Setting
VOUT
RFB1
RFB2
(V)
(kΩ)
(kΩ)
390
12
30.0
270
10
25.0
470
22
20.0
510
27
18.0
CFB
(pF)
27
39
22
18
VOUT
(V)
15.0
10.0
7.0
3.3
RFB1
(kΩ)
470
150
150
150
RFB2
(kΩ)
30
15
22
56
CFB
(pF)
22
68
68
68
<The Use of Ceramic Capacitor CL>
The circuit of the XC9120 series is organized by a specialized circuit, which reenacts negative feedback of both voltage and
current. Also by insertion of approximately 50mΩ of a low and inexpensive sense resistor as current sense, a high degree
of stability is possible even using a ceramic capacitor, a condition which used to be difficult to achieve. Compared to a
tantalum condenser, because the series can be operated in a very small capacity, it is suited to use of the ceramic capacitor,
which is cheap and small.
<External Components>
Tr
SD
L, CL
L
CL
RSENSE
CL
L
CL
RSENSE
: *When a MOSFET is used
XP161A1355PR (N-Channel Power MOSFET, TOREX)
Note: As the breakdown voltage of XP161A1355PR is 20V,
take care with the output voltage. With output
voltages over 17V, use the XP161A11A1PR with a
breakdown voltage of 30V.
VST1: XP161A1355PR=1.2V (MAX.)
XP161A11A1PR=2.5V (MAX.)
: XB01SB04A2 (Schottky Barrier Diode, TOREX)
:Please set up as follows according to an operating condition
or external components.
: 47μH (CDRH5D28, SUMIDA)
: 22μH (CDRH5D28, SUMIDA)
: 25V, 10μF (Ceramic type, TMK316BJ106KL, TAIYO YUDEN)
: 10V, 10μF (Ceramic type, LMK325BJ106ML, TAIYO YUDEN)
Use the formula below when step-up ratio and output current is
large.
CL = (CL standard value) x (IOUT (mA) / 100mA x VOUT / VIN)
: 50mΩ (FOSC = 100kHz)
*When a NPN Transistor is used:
2SD1628 (SANYO)
RB : 500Ω(Adjust with Tr’s HSE or load)
CB : 2200pF (Ceramic type)
CB<1 / (2πx RB x FOSC x 0.7)
:Tantalum Type
: 47μH (CDRH5D28, SUMIDA)
: 22μH (CDRH5D28, SUMIDA)
: 25V, 47μF (Tantalum type, TAJ series, KYOCERA)
: 16V, 47μF (Tantalum type, TAJ series, KYOCERA)
Strengthen appropriately when step-up ratio and output current is
large.
CL = (CL standard value) x (IOUT (mA) / 100mA x VOUT / VIN)
: Not required, but short out the wire.
7/17
XC9120/XC9121/XC9122 Series
■ TEST CIRCUITS
Circuit ①
Circuit ④
Circuit ②
Circuit ⑤
A
RSENSE
L
CB
A
VDD
CFB
RFB1
CIN
FB
CE
A
A
GND
A
CL
Tr
VIN
CE
A
OSC
EXT
VDD
EXT
SD
V
FB
CE
RB
GND
RFB2
RL
Circuit ③
SD
Circuit ⑥
Pulse voltage is applied at the FB pin
using the test circuit ①.
RSENSE
L
CB
A
OSC
EXT
VDD
CFB
RFB1
VIN
CIN
A
EXT
CL
Tr
RB
FB
CE
GND
CFB
RFB1
0.1uF
FB
CE
RFB2
GND
RL
8/17
VDD
V
RFB2
XC9120/XC9121/XC9122
Series
■TYPICAL PERFORMANCE CHARACTERISTICS
(1) Output Voltage vs. Output Current
XC9122D091 (100kHz, 15.0V)
L=47uH(CDRH5D28),SD:XB01SB04A2
CL=40uF(Ceramic),Tr:161A11A1
16.0
L=47uH(CDRH5D28),SD:XB01SB04A2
CL=40uF(Ceramic),Tr:161A11A1
21.0
15.5
Output Voltage: VOUT(V)
Output Voltage: VOUT(V)
XC9122D091 (100kHz, 20.0V)
3.2V, 3.6V, 4.2V
15.0
VIN=2.7V
14.5
20.5
3.6V,4.2V
20.0
VIN=2.7V
3.2V
19.5
14.0
19.0
0.1
1
10
100
0.1
1
Output Current: IOUT(mA)
10
100
Output Current: IOUT(mA)
(2) Efficiency vs. Output Current
XC9122D091 (100kHz, 15.0V)
XC9122D091 (100kHz, 20.0V)
L=47uH(CDRH5D28),SD:XB01SB04A2
CL=40uF(Ceramic),Tr:161A11A1
100
L=47uH(CDRH5D28),SD:XB01SB04A2
CL=40uF(Ceramic),Tr:161A11A1
100
VIN=2.7V
60
3.2V
3.6V
PWM
40
20
4.2V
Efficiency: EFFI(%)
Efficiency: EFFI(%)
4.2V
PWM/PFM
80
0
80
PWM/PFM
60
VIN=2.7V
3.2V
PWM
20
0
0.1
1
10
100
0.1
Output Current: IOUT(mA)
1
10
100
Output Current: IOUT(mA)
(3) Output Voltage vs. Ambient Temperature
(4) Supply Current 1 vs. Supply Voltage
XC9122D091 (100kHz)
XC9122D091 (100kHz)
L=22uH(CDRH5D28),SD:XB01SB04A2
CL=20uF(Ceramic),Tr:XP161A1355PR
16.0
100
15.5
15.0
14.5
VIN=3.6V
IOUT=10mA
14.0
Supply Current1: IDD1(uA)
Output Voltage: V OUT (V)
3.6V
40
80
60
Ta=25oC
85oC
40
-40o C
20
0
-40 -20
0
20
40
60
80 100
Ambient Temperature :Ta( oC)
1
2
3
4
5
6
Pow er Supply V DD(V)
9/17
XC9120/XC9121/XC9122 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(6) Stand-by Current vs. Supply Voltage
(5) Supply Current 2 vs. Supply Voltage
XC9122D091 (100kHz)
XC9122D091 (100kHz)
2.0
Standby Current: ISTB（ uA ）
Supply Current2: IDD2(uA)
50
40
30
Ta=25oC
20
85o C
10
-40oC
1.5
1.0
85oC
0.5
Ta=25,-40oC
0.0
0
1
2
3
4
5
6
1
2
(V)
Pow erVoltage:
Supply: VVDD
DD(V)
Supply
6
XC9122D091 (100kHz)
200
100
Maximum Duty Cycle
MAXDTY (%)
Oscillation Frequency:
FOSC(kHz)
5
(8) Maximum Duty Ratio vs. Supply Voltage
XC9122D091 (100kHz)
Ta=25o C
150
85o C
100
-40o C
50
Ta=25oC-40oC85o C
90
80
70
0
1
2
3
4
5
1
6
2
3
4
5
6
Pow er Voltage:
Supply: V
VDD
DD(V)
Supply
(V)
(V)(V)
Pow
er Supply:
V DD
Supply
Voltage:
VDD
(9) Over Current Sense Voltage vs. Supply Voltage
(10) Soft-Start Time vs. Supply Voltage
XC9122B091 (100kHz)
XC9122D091 (100kHz)
350
20
Soft-start Time: Tss(ms)
Overcurrent SENSE Voltage:
V LMT (%)
4
Pow erVoltage:
Supply: VVDD
(V)
DD(V)
Supply
(7) Oscillation Frequency vs. Supply Voltage
85oC
300
o
Ta=25 C
250
-40o C
200
15
-40o C
Ta=25oC
10
85o C
5
0
150
1
2
3
4
5
(V)
Pow
er Supply:
Supply
Voltage:VVDD
DD
(V)
10/17
3
6
1
2
3
4
5
Pow er Voltage:
Supply: V DD (V)
Supply
(V)
6
XC9120/XC9121/XC9122
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(12) CE "L" Voltage vs. Supply Voltage
(11) CE "H" Voltage vs. Supply Voltage
XC9122D091 (100kHz)
XC9122D091 (100kHz)
1.0
CE 'H' Voltage: VCEH(V)
1.0
CE 'L' Voltage: VCEL(V)
0.8
Ta=25oC
0.6
85oC
0.4
-40o C
0.2
0.8
Ta=25oC
0.6
85oC
0.4
-40o C
0.2
0.0
0.0
1
2
3
4
5
6
1
2
Power
Supply: VVDD
DD(V)
Supply Voltage:
(V)
4
5
6
Pow
er Supply:
Supply
Voltage:VVDD
DD(V)
(V)
(14) EXT L ON Resistance vs. Supply Voltage
(13) EXT H ON Resistance vs. Supply Voltage
XC9122D091 (100kHz)
XC9122D091 (100kHz)
50
EXT 'L' ON Resistance
REXTL (ohm)
50
EXT 'H' ON Resistance
REXTH (ohm)
3
40
Ta=25o C
30
85oC
20
-40o C
10
40
30
Ta=25oC
20
85o C
10
-40oC
0
0
1
2
3
4
5
6
1
Supply
Voltage:
VDD
(V)(V)
Pow
er Supply:
V DD
0.8
0.6
0.4
0.2
0.0
40
60
80 100
Ambient Temperature :Ta(oC)
Operation Hold Voltage: VHOLD (V)
Operation Start Voltage: V ST1 (V)
1.0
20
5
6
XC9122D091 (100kHz)
L=22uH(CDRH5D28),SD:XB01SB04A2
CL=20uF(Ceramic),Tr:2SD1628
0
4
(16) Operation Hold Voltage vs. Ambient Temperature
XC9122D091 (100kHz)
-40 -20
3
Supply
Voltage:
VDD
(V)(V)
Pow
er Supply:
V DD
(15) Operation Start Voltage vs. Ambient Temperature
1.2
2
L=22uH(CDRH5D28),SD:XB01SB04A2
CL=20uF(Ceramic),Tr:2SD1628
0.8
0.6
0.4
0.2
0.0
-40 -20
0
20
40
60
80 100
Ambient Temperature :Ta(oC)
11/17
XC9120/XC9121/XC9122 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(18) PFM Duty Ratio vs. Supply Voltage
(17) Oscillation Start Voltage vs. Ambient Temperature
XC9122D091 (100kHz)
40
0.8
35
0.6
PFM Duty Ratio
PFMDTY(%)
Oscillation Start Voltage: VST2 (V)
XC9122D091 (100kHz)
0.4
0.2
30
Ta=85oC
25
25oC
-40o C
20
15
0.0
10
-40 -20
0
20
40
60
80 100
1
2
o
Ambient Temperature :Ta( C)
5
6
(20) PWM ‘L’ Voltage vs. Supply Voltage
XC9122D091 (100kHz)
XC9122D091 (100kHz)
VDD
0.0
VDD
0.0
PWM 'L' Voltage: VPWML(V)
PWM 'H' Voltage: VPWMH(V)
4
SupplySupply:
Voltage:VDD(V)
VDD (V)
Power
(19) PWM ‘H’ Voltage vs. Supply Voltage
-0.2
Ta=25o C
85oC
-0.4
-0.6
-40o C
-0.8
-1.0
-0.2
Ta=25o C
85o C
-0.4
-0.6
-40oC
-0.8
-1.0
1
2
3
4
5
SupplySupply:
Voltage:VDD(V)
VDD (V)
Power
12/17
3
6
1
2
3
4
5
SupplySupply:
Voltage:VDD(V)
VDD (V)
Power
6
XC9120/XC9121/XC9122
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(21) Load Transient Response
VOUT=15V,
VIN=3.6V, IOUT=100uA → 10mA
VOUT
VOUT
1ch
10mA
10mA
2ch
100uA
100uA
VOUT=15V,
VIN=3.6V, IOUT=10mA → 100uA
IOUT
IOUT
10mA
10mA
2ch
400usec/div.
1ch: VOUT, 100mV/div.
2ch: IOUT, 10mA/div.
VOUT
VOUT
1ch
100uA
100uA
IOUT
IOUT
4.0msec/div.
1ch: VOUT, 100mV/div.
2ch: IOUT, 10mA/div.
13/17
XC9120/XC9121/XC9122 Series
■ PACKAGING INFORMATION
●SOT-25
●USP-6C
Note: The side of pins are not gilded, but nickel is used.
14/17
XC9120/XC9121/XC9122
Series
■PACKAGING INFORMATION (Continued)
●USP-6C Recommended Pattern Layout
●USP-6C Recommended Metal Mask Design
15/17
XC9120/XC9121/XC9122 Series
■ MARKING RULE
●SOT-25
①Represents product series
MARK
PRODUCT SERIES
XC9120x091Mx
XC9121x091Mx
XC9122x091Mx
M
N
P
②Represents current limit function
MARK
B
D
FUNCTION
With Current Limit
Without Current Limit
③Represents oscillation frequency
MARK
OSCILLATION FREQUENCY
1
100kHz
PRODUCT SERIES
XC9120/9121/9122B091Mx
XC9120/9121/9122D091Mx
PRODUCT SERIES
XC9120/9121/9122x091Mx
④Represents production lot number
0 to 9, A to Z, and inverted 0 to 9, A to Z repeated.
(G, I, J, O, Q, W excepted.)
●USP-6C
①Represents product series
MARK
E
F
H
PRODUCT SERIES
XC9120x091Ex
XC9121x091Ex
XC9122x091Ex
②Represents current limit function
MARK
FUNCTION
B
With current limit
D
Without current limit
③④Represents FB voltage
MARK
③
④
0
9
FB VOLTAGE
PRODUCT SERIES
09
XC9120/9121/9122x091Ex
⑤Represents Oscillation Frequency
MARK
OSCILLATION FREQUENCY
1
100kHz
④Represents production lot number
0 to 9, A to Z repeated. (G, I, J, O, Q, W excepted.)
* No inversion is used.
16/17
PRODUCT SERIES
XC9120/9121/9122B091Ex
XC9120/9121/9122D091Ex
PRODUCT SERIES
XC9120/9121/9122x091Ex
XC9120/XC9121/XC9122
Series
1. The products and product specifications contained herein are subject to change without
notice to improve performance characteristics.
Consult us, or our representatives
before use, to confirm that the information in this catalog is up to date.
2. We assume no responsibility for any infringement of patents, patent rights, or other
rights arising from the use of any information and circuitry in this catalog.
3. Please ensure suitable shipping controls (including fail-safe designs and aging
protection) are in force for equipment employing products listed in this catalog.
4. The products in this catalog are not developed, designed, or approved for use with such
equipment whose failure of malfunction can be reasonably expected to directly
endanger the life of, or cause significant injury to, the user.
(e.g. Atomic energy; aerospace; transport; combustion and associated safety
equipment thereof.)
5. Please use the products listed in this catalog within the specified ranges.
Should you wish to use the products under conditions exceeding the specifications,
please consult us or our representatives.
6. We assume no responsibility for damage or loss due to abnormal use.
7. All rights reserved. No part of this catalog may be copied or reproduced without the
prior permission of Torex Semiconductor Ltd.
17/17