XC9220/XC9221 Series
ETR0511_007
16V Input Voltage, Step-Down DC/DC Controller ICs.
■GENERAL DESCRIPTION
The XC9220/XC9221 series is a group of multi-purpose step-down DC/DC controller ICs. The ICs enable a high efficiency,
stable power supply with an output current up to 3A to be configured using only a transistor, a coil, a diode, and two capacitors
connected externally. Low ESR capacitors such as a ceramic capacitor can be used as an output capacitor.
The XC9220/XC9221 series has a 0.9V (±1.5%) reference voltage, and using externally connected resistors, the output
voltage can be set freely. With an internal switching frequency of 300kHz and 500kHz 1.0MHz, small external components
can also be used. The XC9220 series is PWM control, and the XC9221 series is PWM/PFM mode, which automatically
switches from PWM to PFM during light loads and high efficiencies can be achieved over a wide range of load conditions.
As for the soft-start time, the XC9220/XC9221A and C series is internally set to 4msec and the XC9220/XC9221B and D
series can be externally set-up. With the built-in U.V.L.O. (Under Voltage Lock Out) function, the internal P-channel driver
transistor is forced OFF when input voltage becomes 2.3V or lower.
■FEATURES
■APPLICATIONS
Operating Voltage Range
: 2.8V ~ 16.0V
Output Voltage Range
: 1.2V or more
Output Voltage Externally Set : 0.9V (accuracy +1.5%)
Output Current
: Less than 3.0A
Oscillation Frequency
: 300kHz, 500kHz, and 1.0MHz
Control Methods
: PWM control (XC9220)
PWM/PFM automatic switching
(XC9221)
Soft-Start Function
: 4ms, internally set
●Set top boxes
●Digital TVs
●DVD/HDD recorders
●Portable information terminals
●Notebook computers
(XC9220/XC9221A, 500kHz)
Externally set (XC9220/XC9221B)
: Integral protection (1.0 ms)
Protection Circuits
(XC9220/XC9221 Aand B series)
Short-circuit protection
Low ESR
Capacitor Compatible
Packages
: Ceramic capacitor
: SOT-25
USP-6C
■TYPICAL APPLICATION CIRCUIT ■TYPICAL PERFORMANCE
CHARACTERISTICS
V IN
●Efficiency vs. Output Current
XC9221A095MR (VOUT=3.3V, FOSC=500kHz)
C IN
L
4
EXT
FB
3
SBD
CFB
RS ENS E
( f or ceramic CL )
R FB1
CL
R FB2
90
VOUT
VIN=5.0V
80
Efficiency EFFI (%)
GND
CIN=47μF (OS-Con), CL=47μF (OS-Con),
L=10μH (CDRH8D43, SUMIDA)
PchMOSFET: CPH3308 (SANYO), CDD=1.0μF (ceramic), RIN=10Ω
100
Pch
MOSFET
5
CE
2
V IN
1
CE
70
VIN=16.0V
60
VIN=12.0V
50
40
30
20
* RSENSE : Tantalum and electrolytic capacitors can be used, in w hich case,
RSENSE becomes unnecessary.
10
0
0.1
1
10
100
1000
10000
Output Current IOUT (mA)
1/22
XC9220/XC9221 Series
■PIN CONFIGURATION
V IN
EXT/
5
4
1
2
* The dissipation pad for the USP-6C package
(preliminary) 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 VSS (No.5) pin.
3
CE/CSS V SS
FB
SOT-25
(TOP VIEW)
USP-6C
(BOTTOM VIEW)
■PIN ASSIGNMENT
PIN NUMBER
SOT-25
USP-6C
1
2
3
4
5
6
5
4
3
2
1
PIN NAME
FUNCTION
CE/CSS
VSS
FB
EXT/
NC
VIN
Chip Enable / Soft-Start
Ground
Output Voltage Sense
External Transistor Drive
No Connection
Power Supply
■PRODUCT CLASSIFICATION
●Ordering Information
XC9220123456: PWM control
XC9221123456: PWM/PFM automatic switching control
DESIGNATOR
1
23
4
5
6
2/22
DESCRIPTION
SYMBOL
DESCRIPTION
A
: Soft-start internally set with integral protection function
Type of DC/DC Controller
B
: Soft-start externally set with integral protection function
ICs
C
: Soft-start internally set without integral protection function
D
: Soft-start externally set without integral protection function
09
: FB Voltage (Fixed)
3
: 300kHz
Output Voltage
Oscillation Frequency
Package
Device Orientation
5
: 500kHz
A
: 1.0MHz
M
: SOT-25
E
: USP-6C
R
: Embossed tape, standard feed
L
: Embossed tape, reverse feed
XC9220/XC9221
Series
■BLOCK DIAGRAMS
●XC9220/21A and C series
● XC9220/21B and D series
■ ABSOLUTE MAXIMUM RATINGS
Ta = 25OC
PARAMETER
SYMBOL
RATINGS
UNITS
VIN Pin Voltage
VIN
- 0.3 ~ + 18.0
V
FB Pin Voltage
VFB
- 0.3 ~ VIN + 0.3
V
CE/CSS Pin Voltage
CE
- 0.3 ~ VIN + 0.3
V
EXT/ Pin Voltage
VEXT
- 0.3 ~ VIN + 0.3
V
EXT/ Pin Current
IEXT
+ 100
mA
Power Dissipation
SOT-25
USP-6C
Pd
250
100
mW
Operating Temperature Range
Topr
- 40 ~ + 85
O
Storage Temperature Range
Tstg
- 55 ~ +125
O
C
C
3/22
XC9220/XC9221 Series
■ELECTRICAL CHARACTERISTICS
XC9220/XC9221 A and C series
Ta = 25OC
PARAMETER
SYMBOL
FB Voltage
Input Voltage Range
U.V.L.O. Voltage
(Minimum Operating Voltage)
Supply Current 2
Stand-by Current
VFB
VIN
0.8865
2.8
VUVLO
1.9
2.3
-
**
0.1
Oscillation Frequency
FOSC
Maximum Duty Ratio
PFM Duty Ratio
EXT/ High On Resistance
EXT/ Low On Resistance
Integral Protection Time
(*2)
Short-Circuit Protection
Soft-Start Time
Efficiency (*1)
FB Voltage
Temperature Characteristics
MAXDTY
PFMDTY
REXTBH
REXTBL
CE “High” Level Voltage
CE “Low” Level Voltage
CE “High” Level Current
CE “Low” Level Current
FB “High” Level Current
FB “Low” Level Current
IDD2
ISTB
TPRO
VSHORT
TSS
EFFI
UVFB
UToprVFB
VCEH
VCEL
ICEH
ICEL
IFBH
IFBL
CONDITIONS
VIN=5.0V, FB=1.0V
Connected to external
components
No load (XC9221 series only)
100
15
6
6
Unless otherwise stated, VIN=5.0V
*1: EFFI = { (output voltage) x (output current)} / { (input voltage) x (input current) } x 100
*2: No Integral protection function is available with the XC9220/9221 C series.
** Refer to the CHARACTERISTICS CHART BY OSCILLATION FREQUENCY.
MAX.
UNIT.
CIRCUIT
V
V
2
-
2.7
V
3
1.0
μA
μA
1
1
kHz
3
%
%
Ω
Ω
2
3
4
4
ms
2
V
ms
%
ppm
O
/ C
2
2
3
V
V
μA
μA
μA
μA
2
3
1
1
4
4
0.9000 0.9135
16.0
25
10
12
35
16
20
**
-
VIN=CE=16V
VIN=16V, CE=0V
VIN=FB=16V
VIN=16V, FB=0V
TYP.
**
(XC9220/9221 A series)
NOTE:
4/22
MIN.
0.7
-
**
92
-
+100
-
1.2
- 0.1
- 0.1
- 0.1
- 0.1
-
0.3
0.1
0.1
0.1
0.1
-
2
XC9220/XC9221
Series
■ELECTRICAL CHARACTERISTICS (Continued)
XC9220/XC9221 B and D series
Ta = 25OC
PARAMETER
SYMBOL
FB Voltage
Input Voltage Range
U.V.L.O. Voltage
(Minimum Operating Voltage)
Supply Current 2
Stand-by Current
VFB
VIN
0.8865
2.8
VUVLO
1.9
2.3
-
**
0.1
Oscillation Frequency
FOSC
Maximum Duty Ratio
PFM Duty Ratio
EXT/ High On Resistance
EXT/ Low On Resistance
Integral Protection Time
(*4)
Short-Circuit Protection
Soft-Start Time
Internal Soft-Start Time (*1)
Efficiency (*2)
FB Voltage
Temperature Characteristics
MAXDTY
PFMDTY
REXTBH
REXTBL
CE “High” Level Voltage
(*3)
CE “Low” Level Voltage
CE “High” Level Current
CE “Low” Level Current
FB “High” Level Current
FB “Low” Level Current
CONDITIONS
IDD2
ISTB
TPRO
VSHORT
TSS
TSS_IN
EFFI
UVFB
UToprVFB
MIN.
VIN=5.0V, FB=1.0V
Connected to external
components
TYP.
MAX.
UNIT.
CIRCUIT
V
V
2
-
2.7
V
3
1.0
μA
μA
1
1
kHz
3
%
%
Ω
Ω
2
3
4
4
ms
2
V
ms
ms
%
ppm
/OC
2
5
2
3
0.9000 0.9135
16.0
**
No load (XC9221 series only)
100
15
6
6
(XC9220/9221 B series)
25
10
12
35
16
20
**
0.7
20.0
-
10.0
**
92
-
+100
-
VCEH
2.6
-
-
V
2
VCEL
ICEH
ICEL
IFBH
IFBL
- 0.1
- 0.1
- 0.1
- 0.1
-
0.3
0.1
0.1
0.1
0.1
V
μA
μA
μA
μA
2
1
1
4
4
Connected to RSS and CSS
CE=VIN
VIN=CE=16V
VIN=16V, CE=0V
VIN=FB=16V
VIN=16V, FB=0V
5.0
-
2
Unless otherwise stated, VIN=5.0V
External components: CSS=0.1μF, RSS=200kΩ
NOTE:
*1: Internal soft-start time: In case where the U.V.L.O. function operates temporarily due to the power cutoff etc. when an external CSS is
charged (VCE>2.6V), the IC restarts operation by the internal soft-start time. Minimum value of soft-start time set externally is equal to the
internal soft-start time.
*2: EFFI={ (output voltage) x (output current) } / { (input voltage) x (input current) } x 100
*3: The integral latch and short-circuit protection do not function when the CE/CSS pin voltage become lower than 2.6V while the soft-start time.
*4: No Integral protection function is available with the XC9220/XC9221 D series.
** Refer to the CHARACTERISTICS CHART BY OSCILLATION FREQUENCY.
■CHARACTERISTICS CHART BY OSCILLATION FREQUECY
PARAMETER
SYMBOL
Supply Voltage 2
Oscillation Frequency
Integral Protection Time
Soft-Start Time
IDD2
FOSC
TPRO
TSS
MIN.
255
0.5
2
300kHz
TYP.
25
300
1.0
4
MAX.
50
345
2.0
8
MIN.
425
0.5
2
500kHz
TYP.
25
500
1.0
4
MAX.
50
575
2.0
8
MIN.
850
0.25
1
1.0MHz
TYP.
40
1000
0.50
2
MAX.
80
1150
1.00
4
5/22
XC9220/XC9221 Series
■TYPICAL APPLICATION CIRCUITS
● External Components
Pch MOSFET: 2SJ646 (SANYO)
SBD: DE5PC3 (SHINDENGEN)
L: CDRH8D28-4R7 (4.7μH, SUMIDA / Fosc=1.0MHz)
CDRH8D43-100 (10μH, SUMIDA / Fosc=500kHz)
CDRH127-220 (22μH, SUMIDA / Fosc=300kHz)
CIN: 47μF (OS-CON, SANYO)
CL: 47μF (OS-CON, SANYO)
■OPERATIONAL EXPLANATION
The XC9220/XC9221 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator,
phase compensation circuit, protection circuits, U.V.L.O. circuit and others. The series ICs compare, using the error
amplifier, the voltage of the internal voltage reference source with the feedback voltage from the VOUT pin through split
resistors. 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.
<Reference Voltage Source>
The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter.
<Oscillator>
The oscillator determines switching frequency. The frequency is fixed internally and can be selected from 300kHz,
500kHz and 1.0MHz. Clock pulses generated in this circuit are used to produce ramp waveforms needed for PWM
operation, and to synchronize all the internal circuits.
<Error Amplifier>
The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the
feedback voltage (FB pin voltage) divided by the internal split resistors. When a voltage lower than the reference
voltage is fed back, the output voltage of the error amplifier increases. The gain and frequency characteristics of the
error amplifier output are fixed internally to deliver an optimized signal to the PWM comparator.
<Control Methods>
The XC9220 series is PWM control, and the XC9221 series is PWM/PFM automatic switching mode. In the XC9220
series, it is controlled at a constant frequency from light load to heavy load. When a noise etc. is concerned, it is easy
to set up a filter etc. since the frequency is fixed. On the other hand, the efficiency at the time of light load may fall.
In the XC9221 series, the high efficiency can be drawn from PFM control at the time of light load. In PWM/PFM
automatic switching mode, a control method is automatically changed from PWM control to PFM control at the time of
light load. If coil current becomes discontinuous at the time of light load, ON time duty intends to reduce less than
25%. Therefore, the PFM circuit operates to output the pulse, which ON time duty fixed to 25% from the EXT/pin. The
ON time duty is fixed when PFM operation. The pulse is outputted with the cycle suitable for the conditions at that
time. In order that the number of times of switching per unit time may decrease, the efficiency, which it is at the light
load time is improved. However, output cycle of the pulse cannot be fixed. For this, the circuit should be designed
with this point in mind when using a noise filter etc. The conditions shifting to the PFM operation is depend on values
of input voltage, load current, coil and so on.
6/22
XC9220/XC9221
Series
■OPERATIONAL EXPLANATION (Continued)
<U.V.L.O. (Under Voltage Lock Out) >
When the input voltage becomes 2.3V (TYP.) or lower, the external P-channel driver transistor is forced OFF. Once
the U.V.L.O. operates, the XC9220/XC9221A and C series (soft-start internally set type) resets the internal circuit. For
this, by releasing the U.V.L.O. function, the IC performs the soft-start function to initiate output startup operation.
When the input voltage falls because of a power cutoff etc. and the IC stops operation due to the U.V.L.O. function, the
IC resumes its operation by internal soft-start circuit of the XC9220/XC9221B and D series. If the soft-start time is
needed to set externally, the CE/CSS pin voltage should be reset to 0V. (Please see the soft-start circuit example.)
●U.V.L.O. Operation
U.V .L.O. operation
VIN
U.V.L.O. ( Internal Signal)
VOUT
(XC9220/21A and C series)
VOUT
(XC9220/21B and D series)
U.V .L.O.
release delay
U.V .L.O.
release delay
Sof t-start time: Tss1
Sof t-start time (Externally set-up) :Tss2
Sof t-start time:Tss1
<Soft-Start Time>
The XC9220/XC9221B and D series can adjust the soft-start time externally via the CE pin. The soft-start function
operates until the CE pin voltage becomes 2.6V. Please refer to the following equation for calculating the soft-start
time. Minimum soft-start time is equal to the time set internally.
TSS= - CSS x RSS x In { (VCE – 2.2) / VCE }
Internal
sotf-starttime:Tss1
(XC9220/21A series)
Externally set
soft-start time: Tss2
(XC9220/21A series)
XC9220/21A series
Rss
CE/CSS PIN
VCE
Css
XC9220/21B series
Minimum soft-start time
when externally set:
Tss2_min = Tss1
> Circuit Example1 : N-ch Open Drain
> Circuit Examle2 : CMOS logic (low current dissipation) > Cicuit Examle3 : CMOS logic (low current dissipation, quick off)
VCE
VCE
VCE
Rss
ON/OFF
Signal
ON/OFF
Signal
ON/OFF
Signal
Rss
CE/CSS
PIN
Css
Rss
CE/CSS
PIN
Css
CE/CSS
PIN
Css
7/22
XC9220/XC9221 Series
■OPERATIONAL EXPLANATION (Continued)
<Protection Circuits>
1. Integral Protection Circuit (Latch Type)
In the circuit of the XC9220/XC9221 A and B series, the more load current becomes larger, the duty of the EXT/ pin
gradually expands, and the duty reaches maximum (EXT/L). When the MAXDUTY state continues a certain amount
of time (TPRO), the EXT/ pin holds high level (latching) and keeps the P-ch output driver transistor in OFF state. For
resuming the operation from the latching state, please turn off the IC via the CE pin or apply the input voltage again
(operates U.V.L.O. function and release). The latching state does not mean a complete shutdown, but a state in
which pulse output is suspended; therefore, the internal circuitry remains in operation.
However, the integral protection circuit uses the MAXDUTY as a trigger for its operation, it suspends the pulse output
no matter what dropout voltage decreases.
For the specification including small dropout voltage, the
XC9220/XC9221 C or D series, which do not have the integral protection function, are recommended.
z Integral protection circuit
EXT/ Waveform
Latch
Ton < Tpro
Ton > Tpro
Ton : ON Time ( EXT/ : L)
Tpro : Integral Protection Circuit
Delay Time (Internally set)
Protection circuit operates and
EXT/ Output shut dow n
2. Short-Circuit Protection Circuit (Latching Type)
When the FB pin is shorted to the Ground or the output voltage drops rapidly because of over load state etc., the P-ch
driver transistor is kept OFF as in the case with the integral protection circuit. (The protection circuit operates when
the FB voltage becomes 0.7V or lower.) For releasing the latching state, the circuit is needed to restart via the VIN
and the CE pin.
z Short-circuit protection circuit
FB Voltage
0.9V
0.7V
Latch
0.9V
VREF
Less than 100usec = Not latching
Sof t-start time ：Tss x 90%
* Protection circuit does not operate.
8/22
* A bout 100 to 200usec delay time is set
to avoid latching w hen instantaneous
transient response drop
100 usec
XC9220/XC9221
Series
■OPERATIONAL EXPLANATION (Continued)
● Output Voltage Setting
Output voltage can be set by adding 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 1MΩ or less.
VOUT = 0.9 x (RFB1 + RFB2) / RFB2
The value of CFB, speed-up capacitor for phase compensation, should be adjusted by the following equation. Fzfb
should usually be 5kHz. Adjustments are required from 1kHz to 20kHz depending on the application, value of
inductance (L), and value of load capacity (CL).
CFB = 1 / (2 x π x RFB1 x fzfb)
[Sample calculation: Setting 3.3V VOUT]
RFB1 = 200kΩ, RFB2=75kΩ, VOUT = 0.9 x (200k + 75k) / 75k = 3.300V
CFB = 1 / (2 x π x 200k x 5k) =150pF
[Typical examples]
VOUT
(V)
RFB1
(kΩ)
RFB2
(kΩ)
CFB
(pF)
VOUT
(V)
RFB1
(kΩ)
RFB2
(kΩ)
CFB
(pF)
1.2
1.5
1.8
100
180
220
300
270
220
330
180
150
3.3
5.0
12.0
200
150
160
75
33
13
150
220
180
● Recommended MOSFET and SBD (Examples)
IOUT
P-ch MOSFET (*1)
Schottky Barrier Diode
(SBD) (*2)
UP TO 500mA
UP TO 1A
CPH3308
(SANYO)
XB01SB04A2BR
(TOREX)
UP TO 2A
UP TO 3A
2SJ616
(SANYO)
2SJ646
(SANYO)
D1FH3 (SHINDENGEN)
CMS02 (TOSHIBA)
*1:
Recommended to use P-ch MOSFET with Ciss less than 1500pF.
*2:
SBD should be used with high-toned reverse characteristics.
DE5PC3
(SHINDENGEN)
● Ceramic Capacitor
With the XC9220/9221 series, a ceramic capacitor can be used as an output capacitor (CL). RSENSE resistor
is required for using the ceramic capacitor. The value of RSENSE resistor is determined depending on the
setting output voltage as the chart below.
OUTPUT VOLTAGE
VOUT≦2.5V
VOUT>2.5V
RSENSE (mΩ)
100
50
＜External Components＞
P-ch MOSFET: 2SJ646 (SANYO)
SBD: DE5PC3 (SHINDENGEN)
L: CDRH8D28-4R7 (4.7μH, SUMIDA / Fosc=1.0MHz)
CDRH8D43-100 (10μH, SUMIDA / Fosc=500kHz)
CDRH127-220 (22μH, SUMIDA / Fosc=300kHz)
CIN: 22μF (ceramic)
CL: 22μF (ceramic / Fosc=1.0MHz, 500kHz)
47μF (ceramic / Fosc=300kHz)
RSENSE: 100mΩ (VOUT≦2.5V)
50mΩ (VOUT＞2.5V)
9/22
XC9220/XC9221 Series
■OPERATIONAL EXPLANATION (Continued)
● Setting of Coil Value
Recommended inductance value of coil by oscillation frequency is shown in the chart below.
FOSC (kHz)
300
500
1000
L (μH)
22.0
10.0
4.7
However, the more current change in each pulse becomes larger, the more output ripple voltage becomes
higher when dropout voltage is high. This may lead to instability. In this case,
increasing the coil
inductance value will make Ipk_AC small, and it makes output stable.
Ipk_AC = (VIN – VOUT) x VOUT / (VIN x L x FOSC)
L: Coil inductance value
FOSC: Oscillation frequency
Please do not exceed the coil rating. Coil peak current is determined by the following equation.
Ipk = IOUT + Ipk_AC / 2
10/22
XC9220/XC9221
Series
■NOTES ON USE
1. The XC9220/XC9221 series are designed for use with an output ceramic capacitor. If, however, the potential
difference between input and output is too large, a ceramic capacitor may fail to absorb the resulting high switching
energy and oscillation could occur on the output. If the input-output potential difference is large, connect the output
capacitor with large performance to compensate for insufficient capacitance.
2. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly influenced
by external component selection, such as the coil inductance, capacitance values, and board layout of the external
components. Once the design has been completed, verification with actual components should be done.
3. When the difference between input voltage and output voltage is large in PWM control, and the load current is light,
very narrow pulses will be outputted, and there is the possibility that some cycles my be skipped completely.
4. When the difference between input voltage and output voltage is small in PWM control, and the load current is heavy,
very wide pulses will be outputted and there is the possibility that some cycles my be skipped completely.
5. When using the CE pin by pulling up to the VIN pin, please be noted to the rising time of the VIN pin voltage. If the
rising time of the VIN pin voltage is much slower than the soft-start time of the XC9220/XC9221 series, the
short-protection circuit starts to operate so that the output may not rise. If you are using the A or the C series, please
use a voltage detector or something similar in order to check that the input voltage rises fully. Then, start the series via
the CE pin. If you don’t want to use an additional detector in this way, we recommend that you use the B or D series,
adjusting the soft-start period externally so that the voltage at the VIN pin rises fully before the soft-start period is
completed.
6. Use of the IC at voltages below the recommended minimum operating voltage may lead to instability.
7. This IC and external components should be used within the stated absolute maximum ratings in order to prevent
damage to the device.
11/22
XC9220/XC9221 Series
■ NOTES ON USE (Continued)
● Instructions on Pattern Layout
1. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the
circuit impedance.
2. Please strengthen VIN and VSS wiring in particular. Switching noise which occurs from the GND may cause the
instability of the IC. The IC can maintain stable operations with RIN (about 10Ω) and CDD (about 1μF) connected
to the VIN pin.
[Board layout when XC9220/XC9221 series is mounted with external components]
Ceramic Capacitor
Schottky Barrier Diode
Inductor
Resistor
Low value resistor
[PC board for the XC9220/XC9221 series]
12/22
XC9220/XC9221
Series
■TEST CIRCUITS
Circuit 1: Supply Current, Stand-by Current, CE Current
Circuit 2: FB Voltage, Integral Protection, Short-Circuit,
Soft-Start, MAXDUTY, CE Voltage
Probe
VIN
VIN
A
CIN:1uF
A
EXT /
CE/CSS
EXT /
CE/CSS
FB
V
FB
V
VSS
VSS
CIN:1uF
Circuit 3: Oscillation Frequency, PFMDUTY, U.V.L.O., Efficiency
Circuit 4: EXT On Resistance, FB Current
Circuit 5: Soft-Start (Externally set: B and D series)
Probe
VIN
CIN:1uF
V
EXT /
CE/CSS
FB
VIN
A
EXT /
Rss
A
CE/CSS
V
VSS
Css
V
FB
VSS
V
CIN:1uF
13/22
XC9220/XC9221 Series
■ELECTRICAL CHARACTERISTICS (Continued)
(1) Efficiency vs. Output Current
XC9220/21x095xx
100
90
80
80
70
60
50
40
30
10
VIN=5.0V
70
VIN=12V
60
50
40
30
PWM(XC9220)
PFM(XC9221)
20
PWM(XC9220)
PFM(XC9221)
20
Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH
CIN=10uF(ceramic), CL=44uF(ceramic), RSENSE=50mohm
VOUT=3.3V
100
90
Efficiency: EFFI (%)
Efficiency: EFFI (%)
XC9220/21x095xx
Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH, CIN=10uF(ceramic),
CL=44uF(ceramic), RSENSE=50mohm
VIN=12V => VOUT=5V
10
0
0
0.1
1
10
100
1000
0.1
10000
1
10
100
1000
10000
Output Current: IOUT (mA)
Output Current: IOUT (mA)
(2) Output Voltage vs. Output Current
XC9220/21x095xx
5.2
5.0
4.8
4.6
PWM(XC9220)
PFM(XC9221)
Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH
CIN=10uF(ceramic), CL=44uF(ceramic), RSENSE=50mohm
VOUT=3.3V
3.7
Output Voltage: VOUT (V)
5.4
Output Voltage: VOUT (V)
XC9220/21x095xx
Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH
CIN=10uF(ceramic), CL=44uF(ceramic), RSENSE=50mohm
VIN=12V => VOUT=5V
4.4
VIN=5.0V
12V
3.5
3.3
3.1
2.9
PWM(XC9220)
PFM(XC9221)
2.7
0.1
1
10
100
1000
10000
0.1
Output Current: IOUT (mA)
1
10
100
1000
10000
Output Current: IOUT (mA)
(3) Output Ripple Voltage vs. Output Current
XC9220/21x095xx
XC9220/21x095xx
Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH
CIN=10uF(ceramic), CL=44uF(ceramic), RSENSE=50mohm
VIN=12V => VOUT=5V
100
Tr:2SJ646, SBD:DE5PC3, CDRH127-10uH
CIN=10uF(ceramic), CL=44uF(ceramic), RSENSE=50mohm
VOUT=3.3V
100
80
Ripple Voltage: Vr (mV)
Ripple Voltage: Vr (mV)
90
PWM(XC9220)
PFM(XC9221)
60
40
20
PWM(XC9220)
PFM(XC9221)
80
70
60
50
40
VIN=5.0V
30
VIN=12V
20
10
0
0
0.1
1
10
100
1000
Output Current: IOUT (mA)
14/22
10000
0.1
1
10
100
1000
Output Current: IOUT (mA)
10000
XC9220/XC9221
Series
■ELECTRICAL CHARACTERISTICS (Continued)
(5) FB Voltage vs. Input Voltage
(4) FB Voltage Temperature Characteristics
XC9220/21 Series
XC9220/21 Series
VIN=5V
1.00
1.00
0.95
FB Voltage: VFB (V)
FB Voltage: VFB (V)
0.95
0.90
0.85
0.80
0.75
-50
0.90
Ta=85℃
0.85
25℃
-40℃
0.80
0.75
-25
0
25
50
75
2
100
4
6
(6) Input Voltage Temperature Characteristics
VIN=5V, Fosc=300k,500kHz
Supply Current: IDD (uA)
Supply Current: IDD (uA)
16
Fosc=300k,500kHz
50
30
20
10
40
30
20
Ta=85℃
25℃
10
-40℃
0
-25
0
25
50
75
100
0
2
4
Ambient Temperature: Ta ( ℃)
6
8
10
12
14
16
Input Voltage: VIN (V)
(8) Oscillation Frequency Temperature Characteristics
(9) U.V.L.O. Temperature Characteristics
XC9220/21x095xx
XC9220/21Series
VIN=5V
550
2.8
525
UVLO Voltage: VUVLO (V)
Frequency: FOSC (kHz)
14
XC9220/21 Series
40
500
475
450
425
400
-50
12
(7) Supply Current vs. Input Voltage
XC9220/21 Series
0
-50
10
Input Voltage: VIN (V)
Ambient Temperature: Ta ( ℃)
50
8
-25
0
25
50
75
Ambient Temperature: Ta ( ℃)
100
2.6
UVLO(Release)
2.4
2.2
UVLO(Detect)
2.0
1.8
-50
-25
0
25
50
75
100
Ambient Temperature: Ta ( ℃)
15/22
XC9220/XC9221 Series
■ELECTRICAL CHARACTERISTICS (Continued)
(11) EXT L ON Resistance Characteristics
(10) EXT H ON Resistance Characteristics
XC9220/21 Series
XC9220/21Series
30
EXT/L Resistance:REXTBL (Ω)
EXT/H Resistance:REXTBH (Ω)
30
25
20
Ta=85℃
25℃
15
-40℃
10
5
0
Ta=85℃
25
25℃
-40℃
20
15
10
5
0
0
2
4
6
8
10
12
14
16
0
2
4
Input Voltage: VIN (V)
6
8
10
12
14
16
Input Voltage: VIN (V)
(11) Soft-Start Time Temperature Characteristics
XC9220/21 Series
VIN=5V, Fosc=300k,500kHz
7.0
6.0
5.0
4.0
3.0
2.0
-50
-25
0
25
50
75
VIN=5V, Fosc=1.0MHz
4.0
Soft-Start Time : TSS (msec)
8.0
Soft-Start Time: TSS (msec)
XC9220/21Series
3.5
3.0
2.5
2.0
1.5
1.0
-50
100
Ambient Temperature: Ta ( ℃)
-25
0
25
50
75
100
Ambient Temperature: Ta ( ℃)
(12) Integral Protection Time Temperature Characteristics
XC9220/21A, B Series
VIN=5V, Fosc=300k,500kHz
2.0
1.6
1.2
0.8
0.4
0.0
-50
-25
0
25
50
75
Ambient Temperature: Ta ( ℃)
16/22
100
VIN=5V, Fosc=1MHz
1.0
Integral Protection Time: Tpro (msec)
Integral Protection Time: Tpro (msec)
XC9220/21A, B Series
0.8
0.6
0.4
0.2
0.0
-50
-25
0
25
50
75
Ambient Temperature: Ta ( ℃)
100
XC9220/XC9221
Series
■ELECTRICAL CHARACTERISTICS (Continued)
(13) Short-Circuit Protection Temperature Characteristics
(14) Short-Circuit Protection Voltage vs.
Input Voltage
XC9220/21 Series
XC9220/21 Series
VIN=5V
0.7
0.6
0.5
0.4
0.3
-50
0.8
Short-Protection Voltage: Vshort (V)
Short-Protection Voltage: Vshort (V)
0.8
0.7
0.6
0.5
0.4
0.3
-25
0
25
50
75
100
0
2
Ambient Temperature: Ta ( ℃)
4
6
14
16
14
16
XC9220/21 Series
VIN=5V
1.2
1.0
1.2
CE Voltage: VCEH, VCEL (V)
CE Voltage: VCEH, VCEL (V)
12
(16) CE Threshold vs. Input Voltage
XC9220/21 Series
CE_H
0.6
CE_L
0.4
0.2
0.0
-50
10
Input Voltage: VIN (V)
(15) CE Threshold Temperature Characteristics
0.8
8
1.0
CE_H
0.8
0.6
CE_L
0.4
0.2
0.0
-25
0
25
50
75
Ambient Temperature: Ta ( ℃)
100
0
2
4
6
8
10
12
Input Voltage: VIN (V)
17/22
XC9220/XC9221 Series
■ELECTRICAL CHARACTERISTICS (Continued)
(17) Load Transient Response Characteristics
XC9220x095xx (500kHz, PWM Control)
<External Components>
Tr: 2SJ616 (SANYO), SBD: D1FH3 (SHINDENGEN), L=10μH CDRH8D43, SUMIDA)
CIN=47μF (OS-Con), CL=47μF (OS-Con)
○IOUT=0.1mA→1000mA
VIN=5.0V, VOUT=3.3V, VOUT=100mV/div., Time=50μs/div.
VIN=5.0V, VOUT=3.3V, VOUT=100mV/div., Time=10ms/div.
○IOUT=0.1mA→1000mA
VIN=10.0V, VOUT=3.3V, VOUT=100mV/div., Time=50μs /div.
VIN=10.0V, VOUT=3.3V, VOUT=100mV/div., Time=10ms/div.
○IOUT=300mA→3000mA
VIN=10.0V, VOUT=3.3V, VOUT=100mV/div., Time=50μs /div.
18/22
VIN=10.0V, VOUT=3.3V, VOUT=100mV/div., Time=10ms/div.
XC9220/XC9221
Series
■PACKAGING INFORMATION
●SOT-25 (SOT-23-5)
●USP-6C
19/22
XC9220/XC9221 Series
■PACKAGING INFORMATION (Continued)
●USP-6C Recommended Pattern Layout
20/22
●USP-6C Recommended Metal Mask Design
XC9220/XC9221
Series
■ MARKING RULE
●SOT-25
① Represents product series
MARK
M
N
SOT-25 (TOP VIEW)
PRODUCT SERIES
XC9220xxxxxx
XC9221xxxxxx
② Represents product types
MARK
FUNCTION
A
Soft-start internally set with integral protection function
PRODUCT SERIES
XC922xAxxxxx
B
Soft-start externally set with integral protection function
XC922xBxxxxx
C
Soft-start internally set without integral protection function
XC922xCxxxxx
D
Soft-start externally set without integral protection function
XC922xDxxxxx
③ Represents oscillation frequency
MARK
OSCILLATION FREQUENCY
3
300kHz
5
500kHz
A
1.0MHz
PRODUCT SERIES
XC922xxxx3xx
XC922xxxx5xx
XC922xxxxAxx
④ Represents production lot number
0 to 9, A to Z and inverted 0 to 9, A to Z repeated.
(G, I, J, O, Q, W expected.)
●USP-6C
① Represents product series
MARK
1
D
② Represent product types
MARK
USP-6C (TOP VIEW)
PRODUCT SERIES
XC9220xxxxxx
XC9221xxxxxx
FUNCTIONS
A
Soft-start internally set with integral protection function
B
PRODUCT SERIES
XC922xAxxxxx
Soft-start externally set with integral protection function
XC922xBxxxxx
C
Soft-start internally set without integral protection function
XC922xCxxxxx
D
Soft-start externally set without integral protection function
XC922xDxxxxx
③④ Represents FB voltage
MARK
③
0
④
9
FB VOLTAGE
PRODUCT SERIES
0.9V fixed
XC922xx09xxx
⑤ Represents oscillation frequency
MARK
OSCILLATION FREQUENCY
3
300kHz
5
500kHz
A
1.0MHz
PRODUCT SERIES
XC922xxxx3xx
XC922xxxx5xx
XC922xxxxAxx
⑥ Represents production lot number
0 to 9, A to Z repeated. (G, I, J, O, Q, W expected.)
* No character inversion used.
21/22
XC9220/XC9221 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.
22/22