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参数资料
| 型号： | XC9243B08DDR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 5/29页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2A USP-10B |
| 标准包装： | 3,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.9 V ~ 6 V |
| 输入电压： | 2.7 V ~ 6 V |
| 频率 - 开关： | 2.4MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-UFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | USP-10B |
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XC9242/XC9243
Series
■ ELECTRICAL CHARACTERISTICS
● XC9242/XC9243, f OSC =1.2MHz, Ta=25 ℃
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP.
MAX.
UNIT
CIRCUIT
V IN = 5.0V, V CE =5.0V
FB Voltage
V FB
Voltage to start oscillation while
0.784
0.800
0.816
V
③
V FB =0.72V → 0.88V
V IN =V CE =5.0V
Operating Voltage Range
Maximum Output Current
V IN
I OUTMAX
When connected to external components
(*1,*2)
When connected to external components
2.7
2.0
-
-
6.0
-
V
A
①
①
UVLO Voltage
V UVLO
V CE =5.0V, V FB =0.72V
Voltage which Lx pin holding ”L” level
(*3)
2.00
-
2.68
V
③
Quiescent Current
Stand-by Current
Oscillation Frequency
I q
I STB
f OSC
V IN =V CE =5.0V, V FB =0.88V
V IN =5.0V, V CE =0V, V FB =0.88V
V IN =V CE =5.0V, I OUT =300mA
When connected to external components
-
-
1020
41
0.01
1200
78
1.00
1380
μ A
μ A
kHz
②
②
①
PFM Switch Current
(*4)
I PFM
V IN =V CE =4.0V, I OUT =1mA
When connected to external components
-
280
-
mA
①
PFM Duty Limit
(*4)
DTY LIMIT_PFM
V IN =V CE =2.7V, I OUT =1mA
When connected to external components
-
180
250
%
①
V IN =V CE =5.0V, I OUT =500mA
Maximum Duty Limit
Minimum Duty Limit
Efficiency
D MAX
D MIN
EFFI
V IN =V CE =5.0V, V FB =0.72V
V IN =V CE =5.0V, V FB =0.88V
(*5)
R FB1 =47k ? , R FB2 =15k ? , C FB =330pF
100
-
-
-
-
95
-
0
-
%
%
%
③
③
①
LXSW”H”ON Resistance
LXSW”L”ON Resistance
R LxH
R LxL
V IN =V CE =4.0V, V FB =0.72V
(*6)
-
-
0.11
0.12
0.21
(*7)
0.30
Ω
Ω
④
-
LXSW”H” Leakage Current
I LeakH
V IN =5.0V, V CE =0V, V FB =0.88V, V Lx =0V
-
0.01
1.00
(*8)
μ A
⑤
Current Limit
I LIM
V IN =V CE =5.0V, V FB =0.72V
(*9)
-
4.0
-
A
④
Output Voltage
Temperature
Characteristics
CE”H” Voltage
CE”L” Voltage
CE”H” Current
CE”L” Current
FB”H” Current
FB”L” Current
Soft-Start Time
Thermal Shutdown
Temperature
Hysteresis Width
C L Discharge
Δ V OUT /
(V OUT ? Δ topr)
V CEH
V CEL
I CEH
I CEL
I FBH
I FBL
t SS
T TSD
T HYS
R DCHG
I OUT =100mA
-40 ℃≦ Topr ≦ 85 ℃
When connected to external components
V IN =5.0V, V FB =0.72V Applied voltage to V CE
Voltage changes Lx to “H” level
V IN =5.0V, V FB =0.72V Applied to V CE Voltage
changes Lx to “L” level
V IN =5.0V, V CE =5.0V, V FB =0V
V IN =5.0V, V CE =0V, V FB =0V
V IN =5.0V, V CE =0V, V FB =5.0V
VI N =5.0V, V CE =0V, V FB =0V
V IN =5.0V, V CE =0V → 5.0V, I OUT =1mA
When connected to external components
V IN =5.0V, V CE =0V, V FB =0.72V, V Lx =1.0V
-
1.2
AGND
-0.1
-0.1
-0.1
-0.1
0.3
-
-
80
±100
-
-
-
-
-
-
1.0
150
20
130
-
V IN
0.4
0.1
0.1
0.1
0.1
2.0
-
-
160
ppm/℃
V
V
μ A
μ A
μ A
μ A
ms
℃
℃
Ω
①
③
③
⑤
⑤
⑤
⑤
①
-
-
⑥
NOTE:
External Components: C IN1 =20 μ F(ceramic), C IN2 =1 μ F(ceramic), L=4.7 μ H(SLF7055T-4R7 TDK), C L =20 μ F(ceramic)
R FB1 =15k ? , R FB2 =30k ? , C FB =1000pF
Condition: Unless otherwise stated, ”H”=V IN ~ V IN - 1.2V, “L”=+ 0.1V ~ -0.1V
(*1) Mount conditions affect heat dissipation.
Maximum output current is not guaranteed when T TSD starts to operate earlier.
(*2) When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.
If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.
(*3) These values include UVLO detect voltage, UVLO release voltage and hysteresis operating voltage range.
UVLO release voltage is defined as the V IN voltage which makes Lx pin “H”.
(*4) XC9242 series exclude I PFM and DTY LIMIT_PFM because those are only for the PFM control’s functions.
(*5) EFFI = { ( output voltage × output current ) / ( input voltage × input current) } × 100
(*6) On resistance = (V IN – Lx pin measurement voltage) / 100mA
(*7) Design value
(*8) When temperature is high, a current of approximately 20 μ A (maximum) may leak.
(*9) Current limit denotes the level of detection at peak of coil current.
5/29
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