XCL223/XCL224
Series
0.4A/0.7A Inductor Built-in Step-Down “micro DC/DC” Converters
ETR28012-002
☆GreenOperation
Compatible
■GENERAL
DESCRIPTION
The XCL223/XCL224 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC
in one tiny package (2.25mm×1.5mm, h=0.75mmMAX). An internal coil simplifies the circuit and enables minimization of noise
and other operational trouble due to the circuit wiring. A wide operating voltage range of 2.5V to 5.5V enables support for
applications that require an internally fixed output voltage (0.8V to 3.6V). The XCL223/XCL224 series uses synchronous
rectification at an operating frequency of 3.0MHz. The XCL223/XCL224 series uses HiSAT-COT synchronous rectification.
HiSAT-COT+PWM control (XCL223) or HiSAT-COT+automatic PWM/PFM switching control (XCL224) can be selected. The
maximum load current can be selected either 400mA or 700mA.
The series have a high speed soft-start as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock
Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.0V or lower. When CE=Low,
the integrated C
L
discharge function which enables the electric charge at the output capacitor C
L
to be discharged via the internal
discharge switch located between the L
X
and PGND pins. The power consumption will be less than 1.0μA.
■APPLICATIONS
●Note
Book PC
●Tablet
PC
●Mobile
phone
●Wearable
Device
●Optical
Device
■FEATURES
Input Voltage
Output Voltage
Oscillation Frequency
Output Current
Efficiency
Control Methods
:
:
:
:
:
:
Circuit Protection
:
Functions
:
Output Capacitor
Operating Ambient
Temperature
:
:
:
:
2.5V½5.5V
0.8V½3.6V (±2.0%)
3.0MHz
700mA(Type A)
400mA(Type B)
88% (V
IN
=5.0V, V
OUT
=3.3V/300mA)
HiSAT-COT
100% Duty Cycle
PWM (XCL223)
PWM/PFM (XCL224)
Thermal Shut Down
Current Limit Circuit (Drop)
Short Circuit Protection
Soft-Start Circuit Built-In
UVLO
C
L
Discharge
Low ESR Ceramic Capacitor
- 40℃
½
+ 105℃
USP-8B04
EU RoHS Compliant, Pb Free
Package
Environmental Friendly
■TYPICAL
APPLICATION CIRCUIT
■
TYPICAL PERFORMANCE
CHARACTERISTICS
100
XCL223A333D2/XCL224A333D2(V
OUT
=3.3V)
XCL224
V
IN
V
IN
PGND
AGND
V
OUT
L
X
V
CE
CE
L2
V
OUT
CL
Efficiency : EFFI [%]
C
IN
80
60
L1
40
XCL223
20
Vin=5.0V
0
0.1
1
10
100
Output Current : I
OUT
[mA]
1000
1/20
XCL223/XCL224
Series
■BLOCK
DIAGRAM
Inductor
L2
L1
V
OUT
R1
C
FB
Phase
Compensation
R2
Error
Amp.
Comparator
Short
Protection
High Side
Current Limit
V
IN
AGND
Vref with
Soft Start
S
Q
R
Logic
Synch
Buffer
Drive
Lx
CE
CE Control Logic,
UVLO
Thermal Shutdown
Minimum
On Time
Generator
V
IN
V
OUT
PWM/PFM
Selector
PGND
*
The XCL223 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.
The XCL224 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at “PWM/PFM
automatic switching” internally.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
■PRODUCT
CLASSIFICATION
●Ordering
Information
XCL223①②③④⑤⑥-⑦
XCL224①②③④⑤⑥-⑦
DESIGNATOR
①
PWM
PWM/PFM Automatic switching control
ITEM
SYMBOL
Type
A
B
DESCRIPTION
Output Current : 700mA
Output Current : 400mA
Output Voltage options
e.g.)1.2V
→
②=1, ③=2
1.25V
→
②=1, ③=C
②③
Output Voltage
08½36
0.05V Increments:
0.05=A,0.15=B,0.25=C,0.35=D,0.45=E,0.55=F,0.65=H,
0.75=K,0.85=L,0.95=M
④
⑤⑥-⑦
(*1)
Oscillation Frequency
Package (Order Unit)
3
D2-G
3.0MHz
USP-8B04 (3,000pcs/Reel)
(*1) The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
●Selection
Guide
TYPE
A
B
OUTPUT
VOLTAGE
Fixed
Fixed
C
L
AUTO-
DISCHARGE
Yes
Yes
LATCH or
SHORT
PROTECTION
Yes
Yes
UVLO
Yes
Yes
CURRENT
LIMIT
Yes
Yes
SOFT-
START
Fixed
Fixed
THERMAL
SHUTDOWN
Yes
Yes
OUTPUT
CURRENT
700mA
400mA
2/20
XCL223/XCL224
Series
■PIN
CONFIGURATION
V
IN
6
L
X
5
CE 4
1 PGND
2 AGND
3 V
OUT
L2 8
7 L1
BOTTOM VIEW
■
PIN ASSIGNMENT
PIN NUMBER
1
2
3
4
5
6
7
8
PIN NAME
PGND
AGND
V
OUT
CE
Lx
V
IN
L1
L2
FUNCTIONS
Power Ground
Analog Ground
Fixed Output Voltage PIN
Chip Enable
Switching Output
Power Input
Inductor Electrodes
Inductor Electrodes
■
FUNCTION TABLE
PIN NAME
CE
SIGNAL
Low
High
STATUS
Stand-by
Active
* Please do not leave the CE pin open.
■
ABSOLUTE MAXIMUM RATINGS
Ta=25℃
PARAMETER
V
IN
Pin Voltage
L
X
Pin Voltage
V
OUT
Pin Voltage
CE Pin Voltage
Power Dissipation
Operating Ambient Temperature
Storage Temperature
SYMBOL
V
IN
V
Lx
V
out
V
CE
Pd
Topr
T
stg
RATINGS
-0.3 ~ + 6.2
- 0.3 ~ V
IN
+ 0.3 or + 6.2
(*1)
- 0.3 ~ V
IN
+ 0.3 or + 4.0
(*2)
- 0.3 ~ + 6.2
1000
- 40 ~ + 105
- 55 ~ + 125
UNITS
V
V
V
V
mW
℃
℃
All voltages are described based on the GND (AGND and PGND) pin.
(*1)
(*2)
The maximum value should be either V
IN
+0.3 or +6.2 in the lowest voltage
The maximum value should be either V
IN
+0.3 or +4.0 in the lowest voltage
3/20
XCL223/XCL224
Series
■ELECTRICAL
CHARACTERISTICS
●XCL223AxxxD2/XCL224AxxxD2
PARAMETER
Output Voltage
Operating Voltage Range
Maximum Output Current
UVLO Voltage
(*2)
Quiescent Current
(XCL224)
Quiescent Current
(XCL223)
Stand-by Current
Minimum ON time
(*2)
Thermal Shutdown
Thermal shutdown
Hysteresis
LxSW ”H” ON
Resistance
LxSW ”L” ON
Resistance
(*4)
LxSW ”H” Leakage
Current
LxSW ”L” Leakage
Current
Current Limit
(*5)
Output Voltage
Temperature
Characteristics
CE”H” Voltage
CE”L” Voltage
CE”H” Current
CE”L” Current
Soft-start Time
Short Protection
Threshold Voltage
C
L
Discharge
Inductance
Inductor Rated Current
SYMBOL
V
OUT
V
IN
I
OUTMAX
V
UVLO
I
q
I
q
I
STB
t
ONmin
T
TSD
T
HYS
R
LXH
R
LXL
I
LeakH
I
LeakL
I
LIMH
Δ
OUT
/
V
topr)
(V
OUT
・Δ
V
CEH
V
CEL
I
CEH
I
CEL
t
SS
V
OUT
=0.6V, I
LX
=100mA
(*3)
V
OUT
=V
OUT(T)
× 1.1V, I
LX
=100mA
(*3)
V
IN
=5.5V, V
CE
=0V, V
OUT
=0V, V
LX
=5.5V
V
IN
=5.5V, V
CE
=0V, V
OUT
=0V, V
LX
=0V
V
OUT
=0.6V, I
Lx
until Lx pin oscillates
I
OUT
=30mA
-40℃≦Topr≦105℃
V
OUT
=0.6V, Applied voltage to V
CE,
Voltage changes Lx to “H” level
(*6)
V
FB
=0.6V, Applied voltage to V
CE,
Voltage changes Lx to “L” level
(*6)
V
IN
=5.5V, V
CE
=5.5V, V
OUT
=0V
V
IN
=5.5V, V
CE
=0V, V
OUT
=0V
V
CE
=0V→5.0V, V
OUT
=V
OUT(T)
V × 0.9
After "H" is fed to CE, the time by
when clocks are generated at Lx pin.
Sweeping V
OUT
, V
OUT
voltage which Lx
becomes “L” level
(*6)
V
CE
=0V, V
OUT
=4.0V
Test Freq.=1MHz
∆T=+40deg
0.10
0.30
0.50
ms
③
When connected to external components,
V
IN
=<C-1>
V
out
=0.6V,
Voltage which Lx pin holding ”L” level
(*6)
V
OUT
=V
OUT(E)
×1.1V
V
OUT
=V
OUT(E)
×1.1V
V
CE
=0V
When connected to external components,
V
IN
=V
CE
=<C-1>, I
OUT
=1mA
I
OUT
=30mA
CONDITIONS
When connected to external components,
MIN.
<E-1>
2.5
700
1.35
-
-
-
<E-5>
-
-
-
-
-
-
1.3
-
TYP.
<E-2>
-
-
2.00
25
400
0.0
<E-6>
150
30
0.14
0.10
0.0
0.0
1.5
±100
MAX.
<E-3>
5.5
-
2.68
40
825
1.0
<E-7>
-
-
0.28
0.20
30.0
1.0
2.5
-
Ta=25℃
UNITS
V
V
mA
V
μA
μA
μA
ns
℃
℃
Ω
Ω
μA
μA
A
ppm/℃
CIRCUIT
①
①
①
③
②
②
②
①
①
①
④
④
⑤
⑤
⑥
①
1.4
AGND
-0.1
-0.1
-
-
-
-
5.5
0.3
0.1
0.1
V
V
μA
μA
③
③
⑤
⑤
V
SHORT
R
DCHG
L
I
DC
0.17
50
-
-
0.27
210
0.47
0.9
0.37
300
-
-
V
Ω
μH
A
③
⑦
-
-
Unless otherwise stated, V
IN
=5.0V, V
CE
=5.0V, V
OUT(T)
=Nominal Voltage
NOTE:
(*1)
When the difference between the input and the output is small, 100% duty might come up and internal control circuits keep P-ch driver
turning on even though the output current is not so large.
If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.
(*2)
(*3)
(*4)
(*5)
(*6)
Including UVLO detect voltage, hysteresis operating voltage range for UVLO release voltage.
R
LXH
=(V
IN
- Lx pin measurement voltage) / 100mA, R
LXL
=Lx pin measurement voltage / 100mA
Design value for the XCL224 series
Current limit denotes the level of detection at peak of coil current.
"H"=V
IN
½V
IN
- 1.2V, "L"=- 0.1V½+ 0.1V
4/20
XCL223/XCL224
Series
■ELECTRICAL
CHARACTERISTICS
●XCL223BxxxD2/XCL224BxxxD2
PARAMETER
Output Voltage
Operating Voltage Range
Maximum Output Current
UVLO Voltage
(*2)
Quiescent Current
(XCL224)
Quiescent Current
(XCL223)
Stand-by Current
Minimum ON time
(*2)
Thermal Shutdown
Thermal shutdown
Hysteresis
LxSW ”H” ON
Resistance
LxSW ”L” ON
Resistance
(*4)
LxSW ”H” Leakage
Current
LxSW ”L” Leakage
Current
Current Limit
(*5)
Output Voltage
Temperature
Characteristics
CE”H” Voltage
CE”L” Voltage
CE”H” Current
CE”L” Current
Soft-start Time
Short Protection
Threshold Voltage
C
L
Discharge
Inductance
Inductor Rated Current
SYMBOL
V
OUT
V
IN
I
OUTMAX
V
UVLO
I
q
I
q
I
STB
t
ONmin
T
TSD
T
HYS
R
LXH
R
LXL
I
LeakH
I
LeakL
I
LIMH
Δ
OUT
/
V
topr)
(V
OUT
・Δ
V
CEH
V
CEL
I
CEH
I
CEL
t
SS
V
OUT
=0.6V, I
LX
=100mA
(*3)
V
OUT
=V
OUT(T)
× 1.1V, I
LX
=100mA
(*3)
V
IN
=5.5V, V
CE
=0V, V
OUT
=0V, V
LX
=5.5V
V
IN
=5.5V, V
CE
=0V, V
OUT
=0V, V
LX
=0V
V
OUT
=0.6V, I
Lx
until Lx pin oscillates
I
OUT
=30mA
-40℃≦Topr≦105℃
V
OUT
=0.6V, Applied voltage to V
CE,
Voltage changes Lx to “H” level
(*6)
V
FB
=0.6V, Applied voltage to V
CE,
Voltage changes Lx to “L” level
(*6)
V
IN
=5.5V, V
CE
=5.5V, V
OUT
=0V
V
IN
=5.5V, V
CE
=0V, V
OUT
=0V
V
CE
=0V→5.0V, V
OUT
=V
OUT(T)
V × 0.9
After "H" is fed to CE, the time by
when clocks are generated at Lx pin.
Sweeping V
OUT
, V
OUT
voltage which Lx
becomes “L” level
(*6)
V
CE
=0V, V
OUT
=4.0V
Test Freq.=1MHz
∆T=+40deg
0.10
0.30
0.50
ms
③
When connected to external components,
V
IN
=<C-1>
V
out
=0.6V,
Voltage which Lx pin holding ”L” level
(*6)
V
OUT
=V
OUT(E)
×1.1V
V
OUT
=V
OUT(E)
×1.1V
V
CE
=0V
When connected to external components,
V
IN
=V
CE
=<C-1>, I
OUT
=1mA
I
OUT
=30mA
CONDITIONS
When connected to external components,
MIN.
<E-1>
2.5
400
1.35
-
-
-
<E-5>
-
-
-
-
-
-
1.3
-
TYP.
<E-2>
-
-
2.00
25
400
0.0
<E-6>
150
30
0.14
0.10
0.0
0.0
1.5
±100
MAX.
<E-3>
5.5
-
2.68
40
825
1.0
<E-7>
-
-
0.28
0.20
30.0
1.0
2.5
-
Ta=25℃
UNITS
V
V
mA
V
μA
μA
μA
ns
℃
℃
Ω
Ω
μA
μA
A
ppm/℃
CIRCUIT
①
①
①
③
②
②
②
①
①
①
④
④
⑤
⑤
⑥
①
1.4
AGND
-0.1
-0.1
-
-
-
-
5.5
0.3
0.1
0.1
V
V
μA
μA
③
③
⑤
⑤
V
SHORT
R
DCHG
L
I
DC
0.17
50
-
-
0.27
210
1.0
0.55
0.37
300
-
-
V
Ω
μH
A
③
⑦
-
-
Unless otherwise stated, V
IN
=5.0V, V
CE
=5.0V, V
OUT(T)
=Nominal Voltage
NOTE:
(*1)
When the difference between the input and the output is small, 100% duty might come up and internal control circuits keep P-ch driver
turning on even though the output current is not so large.
If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.
(*2)
(*3)
(*4)
(*5)
(*6)
Including UVLO detect voltage, hysteresis operating voltage range for UVLO release voltage.
R
LXH
=(V
IN
- Lx pin measurement voltage) / 100mA, R
LXL
=Lx pin measurement voltage / 100mA
Design value for the XCL224 series
Current limit denotes the level of detection at peak of coil current.
"H"=V
IN
½V
IN
- 1.2V, "L"=- 0.1V½+ 0.1V
5/20
