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| 型号： | XC9236A33DMR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 10/34页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 3.3V .6A SOT-25 |
| 特色产品： | XC9235 and XC9236 Series of Step-Down DC/DC Converters |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 输入电压： | 2 V ~ 6 V |
| 频率 - 开关： | 3MHz |
| 电流 - 输出： | 600mA |
| 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： | SC-74A，SOT-753 |
| 包装： | 标准包装 |
| 供应商设备封装： | SOT-25 |
| 其它名称： | 893-1162-6 |
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XC9235/XC9236/XC9237 Series
■ ELECTRICAL CHARACTERISTICS (Continued)
XC9235D(F)08Dxx/XC9236D(F)08Dxx/XC9237D(F)08Dxx, FB, f OSC =3.0MHz, Ta=25 ℃
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
CIRCUI T
V IN = V CE =5.0V, The V FB at Lx=”High"
FB Voltage
Operating Voltage Range
Maximum Output Current
V FB
V IN
I OUTMAX
(*11)
decreasing FB pin voltage from 0.9V.
V IN =3.2V, V CE =1.0V
When connected to external components
while
(*9)
0.784
1.8
600
0.800
-
-
0.816
6.0
-
V
V
mA
③
①
①
UVLO Voltage
V UVLO
V CE = V IN , V FB = 0.4V ,
Voltage which Lx pin holding “L” level
(*1, *11)
1.00
1.40
1.78
V
③
V IN =3.2V, V CE = V IN , I OUT =1mA
Supply Current
Stand-by Current
Oscillation Frequency
PFM Switching Current
I DD
I STB
f OSC
I PFM
V IN =V CE =5.0V, V FB = 0.88V
V IN =5.0V, V CE =0V, V FB = 0.88V
When connected to external components,
V IN = 3.2V, V CE =1.0V, I OUT =100mA
When connected to external components,
(*12)
-
-
2550
170
21
0
3000
220
35
1.0
3450
270
μ A
μ A
kHz
mA
②
②
①
①
PFM Duty Limit
DTY LIMIT_PFM
V CE = V IN =2.2V I OUT =1mA
(*12)
200
300
%
①
Maximum Duty Cycle
Minimum Duty Cycle
DTY MAX
DTY MIN
V IN = V CE =5.0V, V FB = 0.72V
V IN = V CE =5.0V, V FB = 0.88V
100
-
-
-
-
0
%
%
③
③
Efficiency
Lx SW "H" Leak Current
V IN = V CE = 5.0V
V IN = V CE = 3.6V
(*2)
Lx SW "H" ON Resistance 1
Lx SW "H" ON Resistance 2
Lx SW "L" ON Resistance 1
Lx SW "L" ON Resistance 2
(*5)
EFFI
R L ｘ H
R L ｘ H
R L ｘ L
R L ｘ L
I LEAKH
When connected to external components,
V CE = V IN ＝ 2.4V, I OUT = 100mA
V IN = V CE = 5.0V, V FB = 0.72V,IL X = 100mA
V IN = V CE = 3.6V, V FB = 0.72V,IL X = 100mA
(*4)
(*4)
V IN = V FB = 5.0V, V CE = 0V, L X = 0V
(*3)
(*3)
-
-
-
-
-
-
86
0.35
0.42
0.45
0.52
0.01
-
0.55
0.67
0.65
0.77
1.0
%
Ω
Ω
Ω
Ω
μ A
①
④
④
-
-
⑨
Current Limit
(*10)
I LIM
V IN = V CE = 5.0V, V FB = 0.72V
(*8)
900
1050
1350
mA
⑥
Output Voltage
Temperature Characteristics
V OUT /
(V OUT ?△ Topr)
I OUT =30mA
-40 ℃≦ Topr ≦ 85 ℃
-
± 100
-
ppm/ ℃
①
CE "H" Voltage
CE "L" Voltage
V CEH
V CEL
V FB =0.72V , V CE,
Voltage changes Lx to “H” level
V FB =0.72V, V CE ,
Voltage changes Lx to “L” level
(*11)
(*11)
0.65
V SS
-
-
6.0
0.25
V
V
③
③
I OUT = 1mA
, Voltage which oscillation frequency
becomes 2550kHz ≦ f OSC ≦ 3450kHz
I OUT = 1mA
, Voltage which oscillation frequency
becomes f OSC ＜ 2550kHz
Short Lx at 1 Ω resistance
PWM "H" Level Voltage
PWM "L" Level Voltage
CE "H" Current
CE "L" Current
Soft Start Time (D series)
Soft Start Time (F series)
Latch Time
V PWMH
V PWML
I CEH
I CEL
t SS
t LAT
When connected to external components,
(*6)
(*13)
When connected to external components,
(*6)
(*13)
V IN = V CE =5.0V, V FB =0.72V
V IN =5.0V, V CE = 0V, V FB =0.72V
When connected to external components,
V CE = 0V → V IN , I OUT =1mA
V IN = V CE = 5.0V, V FB = 0.64,
(*7)
-
V IN -
0.25
- 0.1
- 0.1
0.5
-
1.0
-
-
-
-
1.0
0.25
-
V IN - 1.0
-
0.1
0.1
2.5
0.40
20.0
V
V
μ A
μ A
ms
ms
①
①
⑤
⑤
①
⑦
Short Protection Threshold
Voltage
V SHORT
V IN = V CE =5.0V, The V FB at Lx=”Low"
decreasing FB pin voltage from 0.4V.
(*11)
while
0.15
0.200
0.25
V
⑦
C L Discharge
R DCHG
V IN = 5.0V ,L X = 5.0V ,V CE = 0V ,V FB = open
200
300
450
Ω
⑧
Test conditions: V OUT =1.2V when the external components are connected. Unless otherwise stated, V IN =5.0V, V OUT(E) =Nominal Voltage, applied voltage sequence is
V OUT → V IN → V CE
NOTE:
*1: Including hysteresis operating voltage range.
*2: EFFI = { ( output voltage × output current ) / ( input voltage × input current) } × 100
*3: ON resistance ( Ω )= (V IN - Lx pin measurement voltage) / 100mA
*4: R&D value
*5: When temperature is high, a current of approximately 10 μ A (maximum) may leak.
*6: The CE/MODE pin of the XC9237A series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation,
control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than V IN minus 0.3V, and to the PWM
mode when the CE/MODE pin voltage is equal to or lower than V IN minus 1.0V and equal to or greater than V CEH .
*7: Time until it short-circuits V FB with GND via 1 Ω of resistor from an operational state and is set to Lx=0V from current limit pulse generating.
*8: When V IN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.
*9: 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.
*10: Current limit denotes the level of detection at peak of coil current.
*11: “H”=V IN ~V IN -1.2V, “L”=+0.1V~-0.1V
*12: XC9235 series exclude I PFM and DTY LIMIT_PFM because those are only for the PFM control’s functions.
*13: XC9235/XC9236 series exclude V PWMH and V PWML because those are only for the XC9237 series’ functions.
10/34
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