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| 型号： | XC9235A33DER-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 8/34页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 3.3V 0.6A USP-6 |
| 标准包装： | 3,000 |
| 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： | 6-UFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | USP-6C |
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XC9235/XC9236/XC9237 Series
■ ELECTRICAL CHARACTERISTICS (Continued)
XC9235B(C)(E)(G)18Dxx/XC9236B(C)(E)(G)18Dxx/XC9237B(C)(E)(G)18Dxx, V OUT =1.8V, f OSC =3.0MHz, Ta=25 ℃
PARAMETER
Output Voltage
Operating Voltage Range (B/C series)
Operating Voltage Range (E/G series)
SYMBOL
V OUT
V IN
CONDITIONS
When connected to external components,
V IN =V CE =5.0V, I OUT =30mA
MIN.
1.764
2.0
1.8
TYP.
1.800
-
-
MAX.
1.836
6.0
6.0
UNIT
V
V
CIRCUIT
①
①
Maximum Output Current
I OUTMAX
V IN =V OUT(E) +2.0V, V CE =1.0V,
When connected to external components
(*9)
600
-
-
mA
①
V CE =V IN , V OUT =V OUT(E) × 0.5V
,
UVLO Voltage
V UVLO
(*14)
Voltage which Lx pin holding “L” level
(*1,*11)
1.00
1.40
1.78
V
③
V IN =V OUT(E) +2.0V, 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 OUT =V OUT(E) × 1.1V
V IN =5.0V, V CE =0V, V OUT =V OUT(E) × 1.1V
When connected to external components,
V IN =V OUT(E) +2.0V, 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 =(C-1), I OUT =1mA
(*12)
-
200
300
%
①
Efficiency
Maximum Duty Cycle
Minimum Duty Cycle
(*2)
DTY MAX
DTY MIN
EFFI
V IN =V CE =5.0V, V OUT =V OUT(E) × 0.9V
V IN =V CE =5.0V, V OUT =V OUT(E) × 0.1V
When connected to external components,
V CE =V IN ＝ V OUT(E) +1.2V, I OUT =100mA
100
-
-
-
-
86
-
0
-
%
%
%
③
③
①
Lx SW "H" ON Resistance 1
Lx SW "H" ON Resistance 2
R LxH
R LxH
V IN =V CE =5.0V, V OUT =V OUT(E) ×0.9V, I Lx =100mA
V IN =V CE =3.6V, V OUT =V OUT(E) ×0.9V, I Lx =100mA
(*3)
(*3)
-
-
0.35
0.42
0.55
0.67
Ω
Ω
④
④
Lx SW "L" ON Resistance 1
Lx SW "L" ON Resistance 2
R LxL
R LxL
V IN =V CE =5.0V
V IN =V CE =3.6V
(*4)
(*4)
-
-
0.45
0.52
0.65
0.77
Ω
Ω
-
-
Lx SW "H" Leak Current
(*5)
I LEAKH
V IN =V OUT =5.0V, V CE =0V, Lx=0V
-
0.01
1.0
μ A
⑤
Current Limit
(*10)
I LIM
V IN =V CE =5.0V, V OUT =V OUT(E) × 0.9V
(*8)
900
1050
1350
mA
⑥
Voltage changes Lx to “H” level
Voltage changes Lx to “L” level
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
Output Voltage
Temperature Characteristics
CE "H" Voltage
CE "L" Voltage
PWM "H" Level Voltage
PWM "L" Level Voltage
CE "H" Current
CE "L" Current
Soft Start Time (B/G Series)
Soft Start Time (C/E Series)
Latch Time
Short Protection Threshold
Voltage (B/C Series)
△ V OUT /
(V OUT ?△ Topr)
V CEH
V CEL
V PWMH
V PWML
I CEH
I CEL
t SS
t SS
t LAT
V SHORT
I OUT =30mA, -40 ℃≦ Topr ≦ 85 ℃
V OUT =V OUT(E) ×0.9V, Applied voltage to V CE ,
(*11)
V OUT =V OUT(E) ×0.9V, Applied voltage to V CE ,
(*11)
When connected to external components,
(*6)
(*13)
When connected to external components,
(*6)
(*13)
V IN =V CE =5.0V, V OUT =V OUT(E) ×0.9V
V IN =5.0V, V CE =0V, V OUT =V OUT(E) ×0.9V
When connected to external components,
V CE =0V → V IN , I OUT =1mA
When connected to external components,
V CE =0V → V IN , I OUT =1mA
V IN =V CE =5.0V, V OUT =0.8 × V OUT(E) ,
(*7)
Sweeping V OUT , V IN =V CE =5.0V, Short Lx at
1 Ω resistance, V OUT voltage which Lx becomes
“L” level within 1ms
-
0.65
V SS
-
V IN –
0.25
- 0.1
- 0.1
-
0.5
1.0
0.675
± 100
-
-
-
-
-
-
0.32
0.9
-
0.900
-
6.0
0.25
V IN - 1.0
-
0.1
0.1
0.50
2.5
20
1.150
ppm/ ℃
V
V
V
V
μ A
μ A
ms
ms
ms
V
①
③
③
①
①
⑤
⑤
①
①
⑦
⑦
V IN =V CE =5.0V, The V OUT at Lx=”Low"
Short Protection Threshold
Voltage (E/G Series)
C L Discharge
V SHORT
R DCHG
(*11)
decreasing V OUT from V OUT (E) ×0.4V
V IN =5.0V, L X =5.0V, V CE =0V, V OUT =open
while
0.338
200
0.450
300
0.563
450
V
Ω
⑦
⑧
Test conditions: 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 OUT 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.
*14: V IN is applied when V OUT (E) x 0.5V becomes more than V IN .
8/34
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