XC9281/XC9282 Series
ETR05063-005
HiSAT-COT ® Control Extremely Small 600mA Step-Down DC/DC Converters
☆Green Operation Compatible
■GENERAL DESCRIPTION
The XC9281/XC9282 series are 600mA synchronous rectification DC/DC converters adopting HiSAT-COT (*) control. Due to
increasing the oscillation frequency to high frequency, coil with a size of 1.0 x 0.5 mm can be used. A 0.6 x 0.3 mm ceramic
capacitor can be used for the input capacitance (CIN) and the output capacitance (CL), realizing that the mounting area including
peripheral components can be reduced to 3.52 mm2.
Due to increasing the oscillation frequency to a high frequency, the mounting area is reduced. Additionally, an efficiency equal
to or higher than that of conventional products can realize by improving on-resistance and current consumption. Because of
these features, XC9281/XC9282 series are ideal for equipment requiring miniaturization and low profile mounting area, and
battery-powered equipment such as mobile equipment.
Moreover, the high-speed transient response technology of the HiSAT-COT control makes it possible to minimize the
fluctuation of the output voltage for a load transient condition. This feature is optimal for applications requiring a fast response
and output voltage stability for an instantaneous load fluctuation like FPGA.
(*)
HiSAT-COT is a proprietary high-speed transient response technology for DC/DC converter which was developed by Torex. It is Ideal for the LSI's that require
high precision and high stability power supply voltage.
■FEATURES
■APPLICATIONS
(*) HiSAT-COT: TOREX 独自の高速過渡応答可能なオンタイム制御の名称
● Smart phones / Mobile phones
Input Voltage Range
:
2.5V ~ 5.5V
● Wireless earphone / Headset
Output Voltage Range
:
0.7V ~ 1.15V(±2.0%)
Output Current
:
600mA
1.2V ~ 3.6V(±1.5%)
● Wearable devices
● DSC / Camcorder
Quiescent Current
:
11μA(XC9282 PWM/PFM Auto)
● Portable game consoles
Oscillation Frequency
:
4MHz, 6MHz
● Smartcard
Efficiency (fOSC=4MHz)
:
90.0%(VIN=3.7V,VOUT=1.8V,IOUT=200mA)
● Power supply for module
Control Methods
:
HiSAT-COT Control
PWM Control (XC9281)
● Various small power sources
PWM/PFM Auto (XC9282)
■PCB IMAGE
Protection Functions
:
Current Limit
Functions
:
Soft-Start, UVLO
CL Discharge (Type B)
Input / Output Capacitor
:
Ceramic Capacitor
Operating Ambient Temperature
:
- 40℃ ~ 105℃
Package
:
LGA-6B01(1.2 x 1.2 x 0.3mm)
Environmentally
:
WLP-5-06(0.88 x 0.96 x 0.33mm)
EU RoHS Compliant, Pb Free
■TYPICAL PERFORMANCE
CHARACTERISTICS
■TYPICAL APPLICATION CIRCUIT
XC9281B18D / XC9282B18D (VOUT=1.8V)
L = 1.0μH (DFE18SAN1R0MG0L)
CIN = 4.7μF (GRM035R60J475ME15) CL = 4.7μF (GRM035R60J475ME15)
VIN
2.5 ~ 5.5V
CE
(1.0x0.5x0.55mm)
VIN
LX
CE
VOUT
CIN : 4.7uF
(0.6x0.3x0.5mm)
L : 1.0uH
XC9281/XC9282
GND
VOUT
1.8V / 600mA
CL : 4.7uF
(0.6x0.3x0.5mm)
1/31
XC9281/XC9282 Series
■BLOCK DIAGRAM
1) XC9281/XC9282 Series Type A
Phase
Compensation
CFB
R1
Error Amp.
VOUT
+
+
R2
S
Q
R
On Time
Generator
(*)
Logic
Synch.
Buffer
Driver
Lx
Vref with
Soft Start
GND
CE
VIN
Comparator
-
-
Current Limit
VIN
VOUT
CE Control Logic,
UVLO
PWM/PFM
Selector
"PWM/PFM Selector" in the XC9281 series is fixed to PWM control.
"PWM/PFM Selector" In the XC9282 series is fixed to PWM/PFM automatic switching control.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
2) XC9281/XC9282 Series Type B
Phase
Compensation
CFB
R1
Error Amp.
VOUT
+
R2
Current Limit
Comparator
+
S
(*) "PWM/PFM
Logic
R
On Time
Generator
CE
Q
Synch.
Buffer
Driver
Vref with
Soft Start
GND
CE Control Logic,
UVLO
CL Auto-Discharge
VIN
VOUT
PWM/PFM
Selector
Selector" in the XC9281 series is fixed to PWM control.
"PWM/PFM Selector" In the XC9282 series is fixed to PWM/PFM automatic switching control.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
2/31
VIN
Lx
XC9281/XC9282
Series
■PRODUCT CLASSIFICATION
1) Ordering Information
XC9281①②③④⑤⑥-⑦ PWM Control
XC9282①②③④⑤⑥-⑦ PWM/PFM Automatic switching control
DESIGNATOR
ITEM
①
Type
②③
Output Voltage
④
Oscillation Frequency
⑤⑥-⑦(*1)
(*1)
SYMBOL
A
B
07 ~ 36
DESCRIPTION
Refer to Selection Guide
Output voltage options
e.g. 1.2V → ②=1, ③=2
1.25V → ②=1, ③=C
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
D
4.0MHz
E
6.0MHz
1R-G
LGA-6B01 (5,000pcs/Reel)
0R-G
WLP-5-06 (5,000pcs/Reel)
Packages (Order Unit)
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
2) Selection Guide
TYPE
OUTPUT
VOLTAGE
CHIP ENABLE
CL AUTODISCHARGE
UVLO
A
Fixed
Yes
No
Yes
B
Fixed
Yes
Yes
Yes
TYPE
SOFT-START
TIME
CURRENT
LIMIT
AUTOMATIC
RECOVERY
(CURRENT LIMIT)
A
Fixed
Yes
Yes
B
Fixed
Yes
Yes
3/31
XC9281/XC9282 Series
■PIN CONFIGURATION
1 VOU T
GND 6
LX
5
2 NC
VIN
4
3 CE
CE 1
LGA-6B01
(BOTTOM VIEW)
PIN NAME
FUNCTIONS
4
VOUT
Output Voltage Monitor
-
NC
No Connection
3
1
CE
Chip Enable
4
2
VIN
Power Input
5
5
Lx
Switching Output
6
3
GND
Ground
WLP-5-06
1
2
■FUNCTION
PIN NAME
CE
SIGNAL
STATUS
L
Stand-by
H
Active
Please do not leave the CE pin open.
4/31
3 GND
WLP-5-06
(BOTTOM VIEW)
■PIN ASSIGNMENT
PIN NUMBER
LX
5
VOU T 4
LGA-6B01
2 VIN
XC9281/XC9282
Series
■ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNITS
VIN Pin Voltage
VIN
-0.3 ~ 6.2
V
Lx Pin Voltage
VLx
-0.3 ~ VIN + 0.3 or 6.2(*1)
V
4.0(*2)
V
VOUT Pin Voltage
VOUT
CE Pin Voltage
VCE
Power Dissipation
(Ta=25℃)
-0.3 ~ VIN + 0.3 or
-0.3 ~ 6.2
V
760 (JESD51-7 board) (*3)
LGA-6B01
Pd
mW
500 (JESD51-7 board) (*3)
WLP-5-06
Operating Ambient Temperature
Topr
-40 ~ 105
℃
Storage Temperature
Tstg
-55 ~ 125
℃
* All voltages are described based on the GND pin.
(*1) The maximum value should be either V +0.3V or +6.2V in the lowest.
IN
(*2) The maximum value should be either V +0.3V or +4.0V in the lowest.
IN
(*3) The power dissipation figure shown is PCB mounted and is for reference only.
The mounting condition is please refer to PACKAGING INFORMATION.
5/31
XC9281/XC9282 Series
■ELECTRICAL CHARACTERISTICS
XC9281 / XC9282 Series
PARAMETER
SYMBOL
Output Voltage
VOUT
Operating
Voltage Range
VIN
Maximum Output
Current
IOUTMAX
UVLO Voltage(*3)
VUVLO
Quiescent
Current
(XC9281)
Iq
Quiescent
Current
(XC9282)
Iq
Stand-by Current
Ta=25℃
CONDITIONS
MIN.
TYP.
MAX.
UNITS
CIRCUIT
V
①
2.5
-
5.5
V
②
When connected to external components (*2),
VIN =
600
-
-
mA
②
VOUT = 0V, VIN = VCE
VIN Voltage which Lx pin holding “L” level (*7)
1.66
2.00
2.40
V
①
VOUT =4.0V
-
590
948
μA
③
VOUT =4.0V
-
11.0
17.6
μA
③
ISTB
VIN = 5.5V, VCE = 0V, VOUT = 0V, VLx = 0V
-
0.0
0.6
μA
④
ON time
tON
When connected to external components,
VIN=, IOUT=1mA
ns
②
Lx SW”H”ON
Resistance(*4)
RLXH
VIN = 3.6V, VOUT = 0V, ILX = 100mA (*5)
-
0.32
0.50
Ω
⑤
Lx SW”L”ON
Resistance(*4)
RLXL
VIN = 3.6V, VOUT = 3.9V, ILX = 100mA (*5)
-
0.26
0.35
Ω
⑤
Lx SW”H”
Leakage Current
ILeakH
VIN=5.5V, VCE=0V, VOUT=0V, VLX=5.5V
-
0.0
10.0
μA
④
Lx SW”L”
Leakage Current
ILeakL
VIN=5.5V, VCE=0V, VOUT=0V, VLX=0V
-
0.0
0.3
μA
④
Current Limit (*6)
ILIMH
VIN = 3.6V, VOUT=0V ILx until Lx pin oscillates
750
1000
1500
mA
⑥
Output Voltage
Temperature
Characteristics
ΔVOUT/
(VOUT・ΔTopr)
-
±100
-
ppm/℃
①
CE ”H” Voltage
VCEH
1.20
-
5.50
V
①
CE ”L” Voltage
VCEL
GND
-
0.30
V
①
CE ”H” Current
ICEH
VCE = 5.5V, VOUT = 4.0V
-0.1
0.0
0.1
μA
③
CE ”L” Current
ICEL
VIN = 5.5V, VCE = 0V, VOUT = 0V
-0.1
0.0
0.1
μA
④
Soft-Start Time
tSS
VIN = 3.6V, VCE = 0V→3.6V, VOUT = VOUT(T) × 0.9
After "H" is fed to CE, the time by when clocks
are generated at Lx pin.
54
110
201
μs
①
VCE = 0V, VOUT = 1.0V
100
145
200
Ω
⑦
VIN = , VOUT = VOUT(T)×1.2→VOUT(T)×0.8
VOUT Voltage when Lx pin voltage changes from
"L" level to "H" level (*1)(*7)
VIN = , VOUT = VOUT(T)×1.2→VOUT(T)×0.8
VOUT Voltage when Lx pin voltage changes from
"L" level to "H" level (*1)(*7), -40℃≦Topr≦105℃
VIN = 5.5V, VOUT = 0V, VCE Voltage which Lx pin
holding “H” level (*7)
VIN = 5.5V, VOUT = 0V, VCE Voltage which Lx pin
holding “L” level (*7)
CL Discharge
Resistance
RDCHG
(B Type)
Unless otherwise stated, VIN=5V, VCE=5V, VOUT(T)=Nominal Value,
NOTE:
(*1) For PWM control.
(*2) When the difference between the input and the output is small, 100% duty might come up and internal control circuits keep
Pch 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 Pch driver ON resistance.
(*3) Including UVLO detect voltage, hysteresis operating voltage range for UVLO release voltage.
(*4) Design value for WLP-5-06
(*5) R
LXH= (VIN - Lx pin measurement voltage) / 100mA, RLXL= Lx pin measurement voltage / 100mA
(*6) Current limit denotes the level of detection at peak of coil current.
(*7) "H" = V - 1.2V ~ V
IN
IN , "L" = -0.1V ~ 0.1V
6/31
XC9281/XC9282
Series
■ELECTRICAL CHARACTERISTICS (Continued)
SPEC Table
tON
NOMINAL
INPUT
OUTPUT
VOLTAGE
VOLTAGE
VOUT(T)
VIN
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
0.70
2.70
0.686
0.700
0.714
32
65
98
6
43
62
0.75
2.75
0.735
0.750
0.765
34
68
102
7
45
63
0.80
2.80
0.784
0.800
0.816
35
71
107
7
48
67
0.85
2.85
0.833
0.850
0.867
37
75
113
7
50
71
0.90
2.90
0.882
0.900
0.918
39
78
117
8
52
72
0.95
2.95
0.931
0.950
0.969
40
81
122
8
54
76
1.00
3.00
0.980
1.000
1.020
49
83
117
8
56
78
1.05
3.05
1.029
1.050
1.071
51
86
121
9
57
81
1.10
3.10
1.078
1.100
1.122
53
89
125
9
59
83
1.15
3.15
1.127
1.150
1.173
54
91
128
9
61
85
1.20
3.20
1.182
1.200
1.218
56
94
132
37
63
89
1.25
3.25
1.232
1.250
1.268
57
96
135
38
64
90
1.30
3.30
1.281
1.300
1.319
58
98
138
39
66
93
1.35
3.35
1.330
1.350
1.370
60
101
142
40
67
94
1.40
3.40
1.379
1.400
1.421
61
103
145
41
69
97
1.45
3.45
1.429
1.450
1.471
63
105
147
42
70
98
1.50
3.50
1.478
1.500
1.522
64
107
150
42
71
100
1.55
3.55
1.527
1.550
1.573
65
109
153
43
73
103
1.60
3.60
1.576
1.600
1.624
66
111
156
44
74
104
1.65
3.65
1.626
1.650
1.674
67
113
159
45
75
105
1.70
3.70
1.675
1.700
1.725
69
115
161
46
77
108
1.75
3.75
1.724
1.750
1.776
70
117
164
46
78
110
1.80
3.80
1.773
1.800
1.827
82
118
154
47
79
111
1.85
3.85
1.823
1.850
1.877
84
120
156
48
80
112
1.90
3.90
1.872
1.900
1.928
85
122
159
48
81
114
1.95
3.95
1.921
1.950
1.979
86
123
160
49
82
115
2.00
4.00
1.970
2.000
2.030
87
125
163
49
83
117
2.05
4.05
2.020
2.050
2.080
88
127
166
50
84
118
2.10
4.10
2.069
2.100
2.131
89
128
167
51
85
119
2.15
4.15
2.118
2.150
2.182
91
130
169
51
86
121
2.20
4.20
2.167
2.200
2.233
91
131
171
52
87
122
2.25
4.25
2.217
2.250
2.283
92
132
172
52
88
124
2.30
4.30
2.266
2.300
2.334
93
134
175
53
89
125
2.35
4.35
2.315
2.350
2.385
94
135
176
54
90
126
2.40
4.40
2.364
2.400
2.436
95
136
177
54
91
128
2.45
4.45
2.414
2.450
2.486
96
138
180
55
92
129
2.50
4.50
2.463
2.500
2.537
97
139
181
55
93
131
2.55
4.55
2.512
2.550
2.588
98
140
182
55
93
131
2.60
4.60
2.561
2.600
2.639
98
141
184
56
94
132
VOUT
fosc=4.0MHz
fosc=6.0MHz
7/31
XC9281/XC9282 Series
■ELECTRICAL CHARACTERISTICS (Continued)
SPEC Table
tON
NOMINAL
INPUT
OUTPUT
VOLTAGE
VOLTAGE
VOUT(T)
VIN
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
2.65
4.65
2.611
2.650
2.689
99
142
185
57
95
133
2.70
4.70
2.660
2.700
2.740
100
144
188
57
96
135
2.75
4.75
2.709
2.750
2.791
101
145
189
57
96
135
2.80
4.80
2.758
2.800
2.842
102
146
190
58
97
136
2.85
4.85
2.808
2.850
2.892
102
147
192
58
98
138
2.90
4.90
2.857
2.900
2.943
103
148
193
59
99
139
2.95
4.95
2.906
2.950
2.994
104
149
194
59
99
139
3.00
5.00
2.955
3.000
3.045
105
150
195
60
100
140
3.05
5.05
3.005
3.050
3.095
105
151
197
60
101
142
3.10
5.10
3.054
3.100
3.146
106
152
198
60
101
142
3.15
5.15
3.103
3.150
3.197
107
153
199
61
102
143
3.20
5.20
3.152
3.200
3.248
107
154
201
61
103
145
3.25
5.25
3.202
3.250
3.298
108
155
202
61
103
145
3.30
5.30
3.251
3.300
3.349
109
156
203
62
104
146
3.35
5.35
3.300
3.350
3.400
109
157
205
62
104
146
3.40
5.40
3.349
3.400
3.451
109
157
205
63
105
147
3.45
5.45
3.399
3.450
3.501
110
158
206
63
106
149
3.50
5.50
3.448
3.500
3.552
111
159
207
63
106
149
3.55
5.50
3.497
3.550
3.603
112
161
210
64
108
152
3.60
5.50
3.546
3.600
3.654
114
164
214
65
109
153
8/31
VOUT
fosc=4.0MHz
fosc=6.0MHz
XC9281/XC9282
Series
■TEST CIRCUITS
< Circuit No.① >
< Circuit No.② >
Wave Form Measure
Point
Wave Form Measure
Point
VIN
L
LX
VIN
LX
CE
VOUT
A
CIN
4.7μ F
V
Rpulldown
100Ω
VOUT
CE
V
GND
V
CL
GND
V
V
RL
1μ F
※ External Components
L : 0.47μ H
CIN : 4.7μ F(ceramic)
CL : 4.7μ F(ceramic)
< Circuit No.④ >
< Circuit No.③ >
ILeakH
A
VIN
LX
CE
VOUT
A
ICEH
A
2.2μ F
VIN
LX
CE
VOUT
ILeakL
Rpulldown
100Ω
A
GND
GND
ICEL
< Circuit No.⑤ >
A
< Circuit No.⑥ >
V
VIN
Wave Form Measure
Point
LX
A
ILx
2.2μ F
VOUT
CE
V
VIN
LX
CE
VOUT
2.2μ F
ILIM H
1μ F
GND
GND
< Circuit No.⑦ >
B TYPE
VIN
LX
2.2μ F
VOUT
CE
GND
A
V
9/31
XC9281/XC9282 Series
■TYPICAL APPLICATION CIRCUIT
L
VIN
CE
VIN
LX
CE
VOUT
VOUT
CL
CIN
GND
【Typical Examples】 fosc=4.0MHz
MANUFACTURER
PRODUCT NUMBER
VALUE
SIZE(L×W×T)
MCEE1005T1R0MHN
1.0uH
1.0×0.5×0.55(mm)
MCEE1005TR47MHN
0.47uH
1.0×0.5×0.55(mm)
TFM160808ALC-1R0MTAA
1.0uH
1.6×0.8×0.8(mm)
DFE18SAN1R0MG0L
1.0μH
1.6×0.8×1.0(mm)
DFE18SANR47MG0L
0.47μH
1.6×0.8×1.0(mm)
DFE201210U-2R2M
2.2uH
2.0×1.2×1.0(mm)
TAIYO YUDEN
L
TDK
murata
【Typical Examples】 fosc=6.0MHz
MANUFACTURER
TAIYO YUDEN
L
FDK
murata
PRODUCT NUMBER
VALUE
SIZE(L×W×T)
MCEE1005TR47MHN
0.47uH
1.0×0.5×0.55(mm)
MCEE1005T1R0MHN
1.0uH
1.0×0.5×0.55(mm)
MIPSCZ1005DR47T
0.47μH
1.0×0.5×0.75(mm)
DFE18SANR47MG0L
0.47μH
1.6×0.8×1.0(mm)
DFE18SAN1R0MG0L
1.0μH
1.6×0.8×1.0(mm)
【Typical Examples】(*1)
CIN
(*2)
CL
(*1)
MANUFACTURER
PRODUCT NUMBER
VALUE
SIZE(L×W×T)
murata
GRM035R60J475ME15
4.7μF/6.3V
0.6×0.3×0.5(mm)
TDK
C1005X5R0J225M050BC
2.2μF/6.3V
1.0×0.5×0.5(mm)
TAIYO YUDEN
LMK105BJ225KV
2.2μF/10V
1.0×0.5×0.5(mm)
murata
GRM035R60J475ME15
4.7μF/6.3V
0.6×0.3×0.5(mm)
TDK
C1005X5R0J475M050BC
4.7μF/6.3V
1.0×0.5×0.5(mm)
Select components appropriate to the usage conditions (ambient temperature, input & output voltage).
(*2) Please increase a by-pass capacitor as needed.
10/31
XC9281/XC9282
Series
■OPERATIONAL EXPLANATION
This IC consists of a reference voltage source, error amplifier, comparator, phase compensation, on time generation circuit,
output voltage adjustment resistors, current limiter circuit, UVLO circuit, PWM/PFM selection circuit and so on.
Phase
Compensation
CFB
R1
Error Amp.
VOUT
Current Limit
VIN
Comparator
+
-
-
S
+
R2
Q
Logic
R
Synch.
Buffer
Driver
Lx
Vref with
Soft Start
GND
On Time
Generator
VIN
VOUT
CE Control Logic,
UVLO
CL Auto-Discharge
CE
PWM/PFM
Selector
BLOCK DIAGRAM (XC9281/XC9282 Series Type B)
The control method is HiSAT-COT (High Speed circuit Architecture for Transient with Constant On Time), which features the
On time control method and the fast transient response with low ripple voltage.
＜Nomal operation＞
In HiSAT-COT control, ON time (tON) dependent on input voltage and output voltage is generated and Pch MOS driver Tr. Is
turned on. On time is set as follows.
IC with 4MHz :
tON = (VOUT / VIN) x 250ns
IC with 6MHz :
tON = (VOUT / VIN) x 167ns
The off time (tOFF) is controlled by comparing the output voltage and the reference voltage with the error amplifier and the
comparator. Specifically, the reference voltage and a voltage which is obtained by dividing the output voltage with R1 and R2 are
compared with using the error amplifier, apply phase compensation to the output of the error amplifier, and send it to the
comparator. In the comparator, the output of the error amplifier is compared with the reference voltage, and when it falls below
the reference voltage, the SR latch is set and it becomes the ON period again.
The XC9281 series (PWM control) operates in continuous conduction mode and operates at a stable oscillation frequency
regardless of the load. The oscillation frequency can be obtained by the following equation.
fOSC = (VOUT / VIN) x (1 / tON)
The XC9282 series (PWM/PFM automatic switching control) lowers the oscillation frequency at light load by operating in
discontinuous conduction mode at light load. By this operation, it is possible to reduce switching loss at light load and achieve
high efficiency from light load to heavy load.
fOSC
fOSC
tON
tON
VLX
ILX
VLX
0V
0V
IOUT
IOUT
0mA
Continuous Conduction Mode waveform
ILX
0mA
Discontinuous Conduction Mode waveform
In the phase compensation circuit, the frequency characteristic of the error amplifier is optimized, and ramp waves which are
similar to ripple voltages generated at the output are generated to modulate the output signal of the error amplifier. This enables
a stable feedback system to be obtained even when a low ESR capacitor such as a ceramic capacitor is used, and a fast transient
response and stabilization of the output voltage are achieved.
11/31
XC9281/XC9282 Series
■OPERATIONAL EXPLANATION (Continued)
＜100% Duty cycle mode＞
In conditions where the input-output voltage difference is small or transient response, the Pch MOS driver transistor might keep
on turning on and the 100% duty cycle mode might be set. The 100% duty cycle mode achieves high output voltage stability and
highspeed response even under full load conditions and the condition where the input-output voltage difference is small.
＜CE function＞
When "H" voltage (VCEH) is fed to the CE pin, normal operation starts after raising the output voltage with the soft start function.
When the "L" voltage (VCEL) is fed to the CE pin, it enters the standby state and the current consumption is suppressed to 0μA
(TYP.). Additionally, Pch MOS driver transistor and Nch MOS driver transistor are turned off.
＜Soft-Start function＞
It is a function to raise the output voltage gradually and suppress inrush current. After the "H" voltage (VCEH) is fed to the CE pin,
the reference voltage which is connected to the error amplifier increases linearly during the soft start period. As a result, the output
voltage increases in proportion to the increase of the reference voltage. This operation can prevent a large inrush current and
smoothly raise the output voltage.
tSS
VCE
VCEH
0V
VOUT(T) x 90%
VOUT
0V
12/31
XC9281/XC9282
Series
■OPERATIONAL EXPLANATION(Continued)
＜UVLO function＞
When the VIN voltage becomes 2.0V (TYP.) or less, the UVLO function operates to forcibly turn off the Pch MOS driver transistor
to prevent erroneous pulse output due to operation instability of the internal circuit. When the V IN voltage becomes 2.1V (TYP.) or
more, the UVLO function is canceled. After the UVLO function is canceled, the output voltage rises with the soft start function,
and then the normal operation is performed. Moreover, during the UVLO operation, the internal circuit is operating because
stopping by UVLO is not same to a standby mode and just switching operation is stopped.
＜CL Discharge function＞
B type can discharge in a fast manner the output capacitor by internal Nch MOS transistor connected to V OUT pin in order to
prevent malfunction of application due to charge remaining in output capacitor during standby. The output voltage during
discharging can be calculated by the following equation.
V = VOUT (T) × e -t / τ
t =τLn (VOUT (T) / V)
V
: Output voltage during discharge
VOUT (T)
: Output voltage
t
: Discharge time
CL
: Effective capacitance of Output capacitor
RDCHG
: CL auto-discharge resistance
τ
: CL×RDCHG
Output Voltage Discharge characteristics
RDCHG = 145Ω (TYP.), CL=4.7μF
VOUT (T) = 1.0V
VOUT (T) = 1.8V
VOUT (T) = 3.3V
13/31
XC9281/XC9282 Series
■OPERATIONAL EXPLANATION(Continued)
＜Current Limit＞
The current limit function monitors a current flowing through Pch MOS driver transistor and Nch MOS driver transistor and limits
the current. The operation at overcurrent is as follows.
1) When the current flowing through the Pch MOS driver transistor increases and reaches the current limit value I LIMH=1000mA
(TYP.), the current limit state is set and the Pch MOS driver transistor is forcibly turned off.
2) The Nch MOS driver transistor turns on after turning off the Pch MOS driver transistor by the current limit function. The Pch
MOS driver transistor is prohibited to turn on until the current value flowing through the Nch MOS driver transistor drops to
ILIML=800mA (TYP.).
3) Repeat the operations 1) and 2) during the current limit state.
4) When the current limit state is canceled, it automatically returns to normal operation.
Curren t Limit State
I LIMH
ILX
I LIML
0A
VLX
0V
VOUT
0V
14/31
XC9281/XC9282
Series
■NOTE ON USE
1) For the phenomenon of temporal and transitional voltage decrease or voltage increase, the IC may be damaged or deteriorated
if IC is used beyond the absolute MAX. specifications.
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 external components. Once the design
has been completed, verification with actual components should be done.
3) The DC/DC converter characteristics depend greatly on the externally connected components as well as on the characteristics
of this IC, so refer to the specifications and standard circuit examples of each component when carefully considering which
components to select. Be especially careful of the capacitor characteristics and use B characteristics (JIS standard) or X7R, X5R
(EIA standard) ceramic capacitors.
Duty might not be stable when the capacity is insufficient due to high temperature or low temperature, or derating of C L
capacitance happens due to DC bias, etc. Please increase CL as necessary.
4) A feature of HiSAT-COT control is that it controls the off time in order to control the duty, which varies due to the effects of power
loss. In addition, changes in the on time due to 100% duty cycle mode are allowed. For this reason, caution must be exercised as
the characteristics of the switching frequency will vary depending on the external component characteristics, board layout, input
voltage, output voltage, load current and other parameters.
5) Due to propagation delay inside the product, the on time generated by the on time generation circuit is not the same as the on
time that is the ratio of the input voltage to the output voltage.
6) With regard to the current limiting value, the actual coil current may at times exceed the electrical characteristics due to
propagation delay inside the product.
7) The CE pin is a CMOS input pin. Please do not open it. When it connected to either VIN pin or GND pin, it is recommended to
connect a resistor of up to 1MΩ to prevent malfunction of this product and the device connected to the input / output due to short
between pins.
8) The XC9282 series would be in a discontinuous conduction mode at light load, but if the inductance value of the coil is smaller
than the standard value, the coil current will flow back at the time of light load, pulse skipping will not be possible and the efficiency
might be deteriorated.
9) When a coil with poor DC superimposition characteristics is used, it may not be possible to draw a current of I out=600mA at high
temperatures. In this case, either change the coil to one with a large inductance value or use a coil with better DC superimposition
characteristics.
10) In the XC9282 series, if the step-down difference is small or large, the output voltage might decrease in the heavy load region.
Please use XC9281 series when load stability is important.
15/31
XC9281/XC9282 Series
■NOTE ON USE (Continued)
11) In the XC9282 series, decrease of the output voltage, as mentioned in the “NOTE ON USE (10)”, can occur periodically in the
vicinity of 100% Duty cycle mode switching point in the heavy load region and can increase the ripple voltage.
Please use the XC9281 series when you see the output voltage fluctuation as important.
(See diagram below.)
XC9282B12D (VOUT=1.2V, fOSC=4MHz)
Ta=25℃, VIN=2.5V, Iout=500mA
L: 1.0μH (MCEE1005T1R0MHN)
CIN: 4.7μF (GRM035R60J475ME15)
CL: 4.7μF (GRM035R60J475ME15)
Lx:5V/div
5μs/div
VOUT:50mV/div
Lx:5V/div
1μs/div
VOUT:50mV/div
Fig Unstable operation in heavy load
12) Torex places an importance on improving our products and their reliability. We request that users incorporate fail-safe
designs and post-aging protection treatment when using Torex products in their systems.
13) Instructions of pattern layouts
(1) If the wiring impedance is high, noise wraparound due to the output current and phase deviation are likely to occur, and the
operation might become unstable. Please mount peripheral parts as close to IC as possible.
(2) In order to stabilize VIN pin voltage level, we recommend that a by-pass capacitor (CIN) be connected as close as possible to
the VIN pin, GND pin.
(3) Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit
impedance.
(4) Fluctuations in the GND potential due to the GND current during switching might cause the IC operation to become unstable.
Please strengthen the GND wiring sufficiently.
(5) This series’ internal driver transistors bring on heat because of the output current and ON resistance of Pch and Nch MOS
driver transistors. Please consider the countermeasures against heat if necessary.
16/31
XC9281/XC9282
Series
＜Reference pattern layout＞
WLP-5-06
Layer 1
Layer 2
Layer 3
Layer 4
LGA-6B01
Layer 1
Layer 2
Layer 3
Layer 4
17/31
XC9281/XC9282 Series
■NOTE ON USE (Continued)
14) Note on mounting (WLP)
(1) Mount pad design should be optimized for user's conditions.
(2) Sn-AG-Cu is used for the package terminals. If eutectic solder is used, mounting reliability is decreased. Please do not use
eutectic solder paste.
(3). When underfill agent is used to increase interfacial bonding strength, please take enough evaluation for selection. Some
underfill materials and applied conditions may decrease bonding reliability.
(4) The IC has exposed surface of silicon material in the top marking face and sides so that it is weak against mechanical
damages. Please take care of handling to avoid cracks and breaks.
(5) The IC has exposed surface of silicon material in the top marking face and sides. Please use the IC with keeping the circuit
open (avoiding short-circuit from the out).
(6) Semi-transparent resin is coated on the circuit face of the package. Please be noted that the usage under strong lights may
affects device performance.
18/31
XC9281/XC9282
Series
■TYPICAL PERFORMANCE CHARACTERISTICS
(1) Efficiency vs. Output Current
XC9281B08E/XC9282B08E(VOUT =0.8V, f OSC=6MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
XC9281B08D/XC9282B08D(VOUT =0.8V, f OSC=4MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
100
100
XC9281
XC9282
Efficiency: EFFI (%)
80
70
60
50
40
30
V IN=3.7V
20
XC9281
XC9282
90
80
Efficiency: EFFI (%)
90
70
60
50
40
30
V IN=5.0V
10
V IN=3.7V
V IN=3.7V
20
V IN=5.0V
V IN=5.0V
10
0
0
0.1
1
10
100
1000
0.1
1
Output Current: IOUT (mA)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
100
XC9282
80
Efficiency: EFFI (%)
Efficiency: EFFI (%)
XC9281
90
XC9282
80
70
60
50
40
30
V IN=3.7V
20
V IN=5.0V
10
70
60
50
40
30
V IN=3.7V
20
V IN=5.0V
10
0
0
0.1
1
10
100
1000
0.1
1
Output Current: IOUT (mA)
XC9281B18E/XC9282B18E(V OUT =1.8V, f OSC=6MHz)
1000
XC9281B18D/XC9282B18D(V OUT =1.8V, f OSC=4MHz)
90
80
80
70
60
50
V IN=3.7V
XC9281
30
XC9282
20
V IN=5.0V
Efficiency: EFFI (%)
100
90
10
100
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
100
40
10
Output Current: IOUT (mA)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
Efficiency: EFFI (%)
1000
XC9281B10D/XC9282B10D(V OUT =1.0V, f OSC=4MHz)
XC9281
90
100
Output Current: IOUT (mA)
XC9281B10E/XC9282B10E(V OUT =1.0V, f OSC=6MHz)
100
10
70
60
50
V IN=3.7V
40
XC9281
30
XC9282
20
V IN=5.0V
10
0
0
0.1
1
10
100
Output Current: IOUT (mA)
1000
0.1
1
10
100
1000
Output Current: IOUT (mA)
19/31
XC9281/XC9282 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(1) Efficiency vs. Output Current (Continued)
XC9281B33E/XC9282B33E(VOUT =3.3V, f OSC=6MHz)
XC9281B33D/XC9282B33D(V OUT =3.3V, f OSC=4MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
100
100
90
90
80
80
Efficiency: EFFI (%)
Efficiency: EFFI (%)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
70
60
50
XC9281
40
XC9282
30
20
10
70
60
50
XC9281
40
XC9282
30
20
10
V IN=5.0V
0
V IN=5.0V
0
0.1
1
10
100
1000
0.1
1
Output Current: IOUT (mA)
100
1000
Output Current: IOUT (mA)
XC9282B18E(V OUT =1.8V, f OSC=6MHz)
XC9282B18D(V OUT =1.8V, f OSC=4MHz)
V IN = 3.7V
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
V IN = 3.7V
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
95
95
90
90
85
80
75
0.47uH (size:1.6mm×0.8mm)
DFE18SANR47MG0L
70
1.0uH (size:1.6mm×0.8mm)
DFE18SAN1R0MG0L
65
0.47uH (size:1.0mm×0.5mm)
MCEE1005TR47MHN
Efficiency: EFFI (%)
Efficiency: EFFI (%)
10
60
85
80
75
1.0uH (size:1.6mm×0.8mm)
DFE18SAN1R0MG0L
70
0.47uH (size:1.6mm×0.8mm)
DFE18SANR47MG0L
65
1.0uH (size:1.0mm×0.5mm)
MCEE1005T1R0MHN
60
0.1
1
10
100
1000
0.1
Output Current: IOUT (mA)
1
10
100
1000
Output Current: IOUT (mA)
(2) Output Voltage vs. Output Current
XC9281B12E(V OUT =1.0V, f OSC=6MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
XC9281B12D(V OUT =1.0V, f OSC=4MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
1.3
1.3
V IN=2.5,3.7,5.5V
1.25
Output Voltage: V OUT (V)
Output Voltage: VOUT (V)
V IN=2.5,3.7,5.5V
1.2
1.15
1.1
1.2
1.15
1.1
0.1
1
10
100
Output Current: IOUT (mA)
20/31
1.25
1000
0.1
1
10
100
Output Current: IOUT (mA)
1000
XC9281/XC9282
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(2) Output Voltage vs. Output Current (Continued)
XC9282B12E(V OUT =1.2V, f OSC=6MHz)
XC9282B12D(V OUT =1.2V, f OSC=4MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
1.32
1.32
Output Voltage: V OUT (V)
Output Voltage: V OUT (V)
V IN=4.2V
V IN=3.7V
1.26
1.2
V IN=4.2V
V IN=5.0V
1.14
V IN=5.5V
V IN=2.5V
1.08
1.26
V IN=3.7V
1.2
V IN=5.0V
V IN=5.5V
1.14
V IN=2.5V
1.08
0.1
1
10
100
1000
0.1
Output Current: IOUT (mA)
100
1000
XC9281B18D(V OUT =1.8V, f OSC=4MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
1.98
1.98
V IN=2.5,3.7,5.5V
V IN=2.5,3.7,5.5V
1.92
Output Voltage: V OUT (V)
1.92
Output Voltage: V OUT (V)
10
Output Current: IOUT (mA)
XC9281B18E(V OUT =1.8V, f OSC=6MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
1.86
1.80
1.74
1.68
1.62
1.86
1.80
1.74
1.68
1.62
0.1
1
10
100
1000
0.1
Output Current: IOUT (mA)
1
10
100
1000
Output Current: IOUT (mA)
XC9282B18E(V OUT =1.8V, f OSC=6MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
XC9282B18D(V OUT =1.8V, f OSC=4MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
1.98
1.98
1.92
Output Voltage: V OUT (V)
Output Voltage: V OUT (V)
1
V IN=3.7V
1.86
1.80
V IN=5.5V
1.74
1.68
1.92
V IN=3.7V
1.86
1.80
V IN=5.5V
1.74
V IN=2.5V
1.68
V IN=2.5V
1.62
1.62
0.1
1
10
100
Output Current: IOUT (mA)
1000
0.1
1
10
100
1000
Output Current: IOUT (mA)
21/31
XC9281/XC9282 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(2) Output Voltage vs. Output Current (Continued)
XC9281B33E(V OUT =3.3V, f OSC=6MHz)
XC9281B33D(V OUT =3.3V, f OSC=4MHz)
3.63
3.57
3.51
3.45
3.39
3.33
3.27
3.21
3.15
3.09
3.03
2.97
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
V IN=5.0,5.5V
0.1
1
Output Voltage: V OUT (V)
Output Voltage: V OUT (V)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
10
100
3.63
3.57
3.51
3.45
3.39
3.33
3.27
3.21
3.15
3.09
3.03
2.97
1000
V IN=5.0,5.5V
0.1
Output Current: IOUT (mA)
Output Voltage: V OUT (V)
Output Voltage: V OUT (V)
V IN=5.0V
V IN=4.2V
1
10
100
1000
XC9282B33D(V OUT =3.3V, f OSC=4MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
V IN=5.5V
0.1
10
Output Current: IOUT (mA)
XC9282B33E(V OUT =3.3V, f OSC=6MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
3.63
3.57
3.51
3.45
3.39
3.33
3.27
3.21
3.15
3.09
3.03
2.97
1
100
1000
3.63
3.57
3.51
3.45
3.39
3.33
3.27
3.21
3.15
3.09
3.03
2.97
V IN=5.5V
V IN=5.0V
V IN=4.2V
0.1
Output Current: IOUT (mA)
1
10
100
1000
Output Current: IOUT (mA)
XC9281B10E/XC9282B10E(V OUT =1.0V, f OSC=6MHz)
XC9281B10D/XC9282B10D(V OUT =1.0V, f OSC=4MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
100
90
80
70
60
50
40
30
20
10
0
XC9281
V IN=3.7V
XC9282
0
1
10
100
Output Current: IOUT (mA)
22/31
Ripple Voltage: Vr(mV)
Ripple Voltage: Vr(mV)
(3) Ripple Voltage vs. Output Current
1000
100
90
80
70
60
50
40
30
20
10
0
XC9281
V IN=3.7V
XC9282
0
1
10
100
Output Current: IOUT (mA)
1000
XC9281/XC9282
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(3) Ripple Voltage vs. Output Current (Continued)
XC9281B18E/XC9282B18E(V OUT =1.8V, f OSC=6MHz)
XC9281B18D/XC9282B18D(V OUT =1.8V, f OSC=4MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
100
100
V IN=3.7V
80
90
XC9281
Ripple Voltage: Vr(mV)
Ripple Voltage: Vr(mV)
90
XC9282
70
60
50
40
30
20
10
XC9282
70
60
50
40
30
20
10
0
0
0.1
1
10
100
1000
0.1
1
Output Current: IOUT (mA)
100
1000
XC9281B33D/XC9282B33D(V OUT =3.3V, f OSC=4MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
100
100
V IN=5.0V
80
XC9281
90
XC9282
80
Ripple Voltage: Vr(mV)
90
Ripple Voltage: Vr(mV)
10
Output Current: IOUT (mA)
XC9281B33E/XC9282B33E(V OUT =3.3V, f OSC=6MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
70
60
50
40
30
20
10
XC9281
V IN=5.0V
XC9282
70
60
50
40
30
20
10
0
0
0.1
1
10
100
1000
0.1
1
Output Current: IOUT (mA)
UVLO Voltage: UVLO (V)
1.950
V IN=3.6,5.5V
1.850
1.800
1.750
1.700
1.650
1.600
-25
0
25
50
75
Ambient Temperature: Ta (℃)
1000
XC9281B18E/XC9281B18D(V OUT =1.8V)
2.000
-50
100
(5) UVLO Voltage vs. Ambient Temperature
XC9281B18E/XC9281B18D(VOUT =1.8V)
1.900
10
Output Current: IOUT (mA)
(4) Output Voltage vs. Ambient Temperature
Output Voltage: V OUT (V)
XC9281
V IN=3.7V
80
100
125
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
UVLO Release Voltage
UVLO Detect Voltage
-50
-25
0
25
50
75
100
125
Ambient Temperature: Ta (℃)
23/31
XC9281/XC9282 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(6) Quiescent Current vs. Ambient Temperature
1000
900
800
700
600
500
400
300
200
100
0
XC9282B18E/XC9282B18D(V OUT =1.8V)
30.0
V IN=5.0V
Quiescent Current: Iq (μA)
Quiescent Current: Iq (μA)
XC9281B18E/XC9281B18D(V OUT =1.8V)
V IN=3.6V
V IN=2.5V
-50
-25
0
25
50
75
100
25.0
V IN=2.5,3.6,5.0V
20.0
15.0
10.0
5.0
0.0
125
-50
Ambient Temperature: Ta (℃)
-25
0
25
50
75
100
125
Ambient Temperature: Ta (℃)
(7) Stand-by Current vs. Ambient Temperature
(8) Oscillation Frequency vs. Output Current
XC9282B18E/XC9282B18D(V OUT =1.8V)
XC9281B08E(V OUT =0.8V, f OSC=6MHz)
5.0
Oscillation Freqency: f OSC (MHz)
Standby Current: IST B (μA)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
4.0
V IN=5.5V
3.0
V IN=3.7V
2.0
V IN=2.5V
1.0
0.0
-50
-25
0
25
50
75
100
8.0
7.5
V IN=3.0V
6.5
6.0
5.5
5.0
VIN=5.0V
4.5
4.0
0
125
V IN=3.7V
7.0
V IN=5.0V
6.0
5.5
5.0
V IN=3.0V
1000
8.0
7.5
7.0
V IN=5.0,5.5V
6.5
6.0
5.5
5.0
V IN=4.5V
4.5
4.0
4.0
0
1
10
100
Output Current: IOUT (mA)
24/31
100
XC9281B33E(V OUT =3.3V, f OSC=6MHz)
8.0
4.5
10
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
Oscillation Freqency: f OSC (MHz)
Oscillation Freqency: f OSC (MHz)
XC9281B18E(V OUT =1.8V, f OSC=6MHz)
L = 0.47μH(DFE18SANR47MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
6.5
1
Output Current: IOUT (mA)
Ambient Temperature: Ta (℃)
7.5
V IN=3.7V
7.0
1000
0.1
1.0
10.0
100.0
Output Current: IOUT (mA)
1000.0
XC9281/XC9282
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(8) Oscillation Frequency vs. Output Current (Continued)
XC9281B08D(V OUT =0.8V, f OSC=4MHz)
XC9281B18D(V OUT =1.8V, f OSC=4MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
Oscillation Freqency: f OSC (MHz)
Oscillation Freqency: f OSC (MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
6.0
5.5
V IN=3.0V
5.0
4.5
4.0
3.5
3.0
V IN=3.7V
2.5
VIN=5.0V
2.0
6.0
5.5
5.0
V IN=5.0V
4.5
4.0
3.5
V IN=3.7V
3.0
V IN=3.0V
2.5
2.0
0
1
10
100
1000
0
1
Output Current: IOUT (mA)
10
100
1000
Output Current: IOUT (mA)
(9) Pch Driver ON Resistance vs. Ambient Temperature
XC9281B18E0R/XC9281B18D0R(VOUT =1.8V)
XC9281B33D(V OUT =3.3V, f OSC=4MHz)
6.0
5.5
5.0
V IN=5.0,5.5V
4.5
4.0
3.5
V IN=4.5V
3.0
2.5
2.0
0.1
1.0
10.0
100.0
1000.0
Lx SW Pch ON Resistance: R LxH (Ω)
Oscillation Freqency: f OSC (MHz)
L = 1.0μH(DFE18SAN1R0MG0L)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(GRM035R60J475ME15)
1.00
0.80
0.20
0.00
-50
-25
V IN=5.0V
0.60
0.40
0.20
0.00
0
25
50
75
100
125
LxSW”H” Leakage Current: ILeakH (μA)
Lx SW Nch ON Resistance: RLxL (Ω)
0.80
Ambient Temperature : Ta (℃)
50
75
100
125
XC9282B18E/XC9282B18D(V OUT =1.8V)
1.00
-25
25
(11) LxSW”H” Leakage Current vs. Ambient Temperature
XC9281B18E0R/XC9281B18D0R(V OUT =1.8V)
-50
0
Ambient Temperature : Ta (℃)
(10) Nch Driver ON Resistance vs. Ambient Temperature
V IN=3.6V
V IN=5.0V
0.40
Output Current: IOUT (mA)
V IN=2.5V
V IN=3.6V
V IN=2.5V
0.60
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
V IN=5.5V
-50
-25
0
25
50
75
100
125
Ambient Temperature: Ta (℃)
25/31
XC9281/XC9282 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(12) LxSW”L” Leakage Current vs. Ambient Temperature
(13) CE”H” Voltage vs. Ambient Temperature
XC9282B18E/XC9282B18D(V OUT =1.8V)
1.4
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
CE”H” Voltage V CEH (V)
LxSW”L” Leakage Current: ILeakL (μA)
XC9282B18E/XC9282B18D(V OUT =1.8V)
V IN=5.5V
1.2
1.0
0.8
0.6
V IN=5.0V
V IN=3.6V
V IN=2.5V
0.4
0.2
0.0
-50
-25
0
25
50
75
100
-50
125
-25
(14) CE”L” Voltage vs. Ambient Temperature
75
100
125
XC9281B18E/XC9281B18D(V OUT =1.8V)
1.4
1,400
1.2
Current Limit: ILIMH (mA)
CE”L” Voltage V CEL (V)
50
(15) Current Limit vs. Ambient Temperature
XC9282B18E/XC9282B18D(V OUT =1.8V)
1,200
1.0
0.8
1,000
0.6
0.4
V IN=5.0V
V IN=3.6V
V IN=2.5V
0.2
0.0
V IN=5.5V
V IN=3.7V
V IN=2.5V
800
600
-50
-25
0
25
50
75
100
125
-50
-25
Ambient Temperature: Ta (℃)
CL Discharge Resistance: R DCHG (Ω)
400
V IN=2.5,3.6,5.0V
300
200
100
0
0
25
50
75
Ambient Temperature: Ta (℃)
50
75
100
125
XC9282B18E/XC9282B18D(V OUT =1.8V)
500
-25
25
(17) C L Discharge Resistance vs. Ambient Temperature
XC9282B18E/XC9282B18D(V OUT =1.8V)
-50
0
Ambient Temperature: Ta (℃)
(16)Soft-Start Time vs. Ambient Temperature
Soft-Start Time tSS (μs)
25
Ambient Temperature: Ta (℃)
Ambient Temperature: Ta (℃)
26/31
0
100
125
600
500
V IN=5.0V
V IN=3.6V
V IN=2.5V
400
300
200
100
0
-50
-25
0
25
50
75
Ambient Temperature: Ta (℃)
100
125
XC9281/XC9282
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(18) Load Transient Respones
XC9281B10E (V OUT = 1.0V, f OSC = 6MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 0.47μH(MIPSCZ1005DR47T)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
XC9282B10E (V OUT = 1.0V, f OSC = 6MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 0.47μH(MIPSCZ1005DR47T)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
IOUT:300mA
IOUT:300mA
IOUT:1mA
IOUT:1mA
VOUT:50mV/div
VOUT:50mV/div
200μs/div
200μs/div
XC9282B18E (V OUT = 1.8V, f OSC = 6MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 0.47μH(MIPSCZ1005DR47T)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
XC9281B18E (V OUT = 1.8V, f OSC = 6MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 0.47μH(MIPSCZ1005DR47T)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
IOUT:300mA
IOUT:300mA
IOUT:1mA
IOUT:1mA
VOUT:50mV/div
VOUT:50mV/div
200μs/div
XC9281B33E (V OUT = 3.3V, f OSC = 6MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 0.47μH(MIPSCZ1005DR47T)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
200μs/div
XC9282B33E (V OUT = 3.3V, f OSC = 6MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 0.47μH(MIPSCZ1005DR47T)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
IOUT:300mA
IOUT:300mA
IOUT:1mA
IOUT:1mA
VOUT:50mV/div
VOUT:50mV/div
200μs/div
200μs/div
27/31
XC9281/XC9282 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(18) Load Transient Respones(Continued)
XC9281B10D (V OUT = 1.0V, f OSC = 4MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 1.0μH(MCEE1005T1R0MHN)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
XC9282B10D (V OUT = 1.0V, f OSC = 4MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 1.0μH(MCEE1005T1R0MHN)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
IOUT:300mA
IOUT:300mA
IOUT:1mA
IOUT:1mA
VOUT:50mV/div
VOUT:50mV/div
200μs/div
200μs/div
XC9282B18D (V OUT = 1.8V, f OSC = 4MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 1.0μH(MCEE1005T1R0MHN)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
XC9281B18D (V OUT = 1.8V, f OSC = 4MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 1.0μH(MCEE1005T1R0MHN)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
IOUT:300mA
IOUT:300mA
IOUT:1mA
IOUT:1mA
VOUT:50mV/div
VOUT:50mV/div
200μs/div
XC9281B33D (V OUT = 3.3V, f OSC = 4MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 1.0μH(MCEE1005T1R0MHN)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
200μs/div
XC9282B33D (V OUT = 3.3V, f OSC = 4MHz)
V IN = 5.0V
IOUT = 1mA ⇔ 300mA (tr, tf = 5us)
L = 1.0μH(MCEE1005T1R0MHN)
CIN = 4.7μF(GRM035R60J475ME15)
CL = 4.7μF(C1005X5R0J475M050BC)
IOUT:300mA
IOUT:300mA
IOUT:1mA
IOUT:1mA
VOUT:50mV/div
VOUT:50mV/div
200μs/div
28/31
200μs/div
XC9281/XC9282
Series
■PACKAGING INFORMATION
For the latest package information go to, www.torexsemi.com/technical-support/packages
PACKAGE
OUTLIN / LAND PATTERN
THERMAL CHARACTERISTICS
LGA-6B01
LGA-6B01 PKG
JESD51-7 Board
LGA-6B01 Power Dissipation
WLP-5-06
WLP-5-06 PKG
JESD51-7 Board
WLP-5-06 Power Dissipation
29/31
XC9281/XC9282 Series
■MARKING RULE
●LGA-6B01 / WLP-5-06
① represents products series
MARK
PRODUCT SERIESIES
8
9
XC9281******-G
XC9282******-G
② represents type, Oscillation Frequency, and the second decimal place of the output voltage
Oscillation
品名表記例
MARK
Frequency
A
XC928*A*0E**-G～XC928*A*9E**-G
B
XC928*B*0E**-G～XC928*B*9E**-G
6.0MHz
C
XC928*A*AE**-G～XC928*A*ME**-G
D
XC928*B*AE**-G～XC928*B*ME**-G
E
XC928*A*0D**-G～XC928*A*9D**-G
F
XC928*B*0D**-G～XC928*B*9D**-G
4.0MHz
H
XC928*A*AD**-G～XC928*A*MD**-G
K
XC928*B*AD**-G～XC928*B*MD**-G
③ represents output voltage
MARK
OUTPUT VOLTAGE (V)
0
0.7
0.75
1
0.8
0.85
2
0.9
0.95
3
1.0
1.05
4
1.1
1.15
5
1.2
1.25
6
1.3
1.35
7
1.4
1.45
8
1.5
1.55
9
1.6
1.65
A
1.7
1.75
B
1.8
1.85
C
1.9
1.95
D
2.0
2.05
E
2.1
2.15
F
2.2
2.25
H
2.3
2.35
K
2.4
2.45
L
2.5
2.55
M
2.6
2.65
N
2.7
2.75
P
2.8
2.85
R
2.9
2.95
S
3.0
3.05
T
3.1
3.15
U
3.2
3.25
V
3.3
3.35
X
3.4
3.45
Y
3.5
3.55
Z
3.6
-
PRODUCT SERIESIES
XC928**07/0K***-G
XC928**08/0L***-G
XC928**09/0M***-G
XC928**10/1A***-G
XC928**11/1B***-G
XC928**12/1C***-G
XC928**13/1D***-G
XC928**14/1E***-G
XC928**15/1F***-G
XC928**16/1H***-G
XC928**17/1K***-G
XC928**18/1L***-G
XC928**19/1M***-G
XC928**20/2A***-G
XC928**21/2B***-G
XC928**22/2C***-G
XC928**23/2D***-G
XC928**24/2E***-G
XC928**25/2F***-G
XC928**26/2H***-G
XC928**27/2K***-G
XC928**28/2L***-G
XC928**29/2M***-G
XC928**30/3A***-G
XC928**31/3B***-G
XC928**32/3C***-G
XC928**33/3D***-G
XC928**34/3E***-G
XC928**35/3F***-G
XC928**36E**-G
④⑤ represents production lot number
01～09, 0A～0Z, 11～9Z, A1～A9, AA～AZ, B1～ZZ in order. (G, I, J, O, Q, W excluded)
* No character inversion used.
30/31
LGA-6B01
WLP-5-06
XC9281/XC9282
Series
1.
The product 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 datasheet is up to date.
2.
The information in this datasheet is intended to illustrate the operation and characteristics of our
products. We neither make warranties or representations with respect to the accuracy or
completeness of the information contained in this datasheet nor grant any license to any
intellectual property rights of ours or any third party concerning with the information in this
datasheet.
3.
Applicable export control laws and regulations should be complied and the procedures required
by such laws and regulations should also be followed, when the product or any information
contained in this datasheet is exported.
4.
The product is neither intended nor warranted for use in equipment of systems which require
extremely high levels of quality and/or reliability and/or a malfunction or failure which may cause
loss of human life, bodily injury, serious property damage including but not limited to devices or
equipment used in 1) nuclear facilities, 2) aerospace industry, 3) medical facilities, 4) automobile
industry and other transportation industry and 5) safety devices and safety equipment to control
combustions and explosions. Do not use the product for the above use unless agreed by us in
writing in advance.
5.
Although we make continuous efforts to improve the quality and reliability of our products;
nevertheless Semiconductors are likely to fail with a certain probability. So in order to prevent
personal injury and/or property damage resulting from such failure, customers are required to
incorporate adequate safety measures in their designs, such as system fail safes, redundancy
and fire prevention features.
6.
Our products are not designed to be Radiation-resistant.
7.
Please use the product listed in this datasheet within the specified ranges.
8.
We assume no responsibility for damage or loss due to abnormal use.
9.
All rights reserved. No part of this datasheet may be copied or reproduced unless agreed by Torex
Semiconductor Ltd in writing in advance.
TOREX SEMICONDUCTOR LTD.
31/31
工商网监
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