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参数资料
| 型号： | XC9236A33DMR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 12/34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
■ TYPICAL APPLICATION CIRCUIT
● XC9235/XC9236/XC9237A, B, C, E, G Series (Output Voltage Fixed)
V OUT
600mA
C L
(ceramic)
L
Lx
VSS
VOUT
V IN
VSS
CE/
MODE
V IN
C IN
(ceramic)
CE/MODE
● f OSC =3.0MHz
L: 1.5 μ H
C IN : 4.7 μ F
C L : 10 μ F
● f OSC =1.2MHz
(NR3015, TAIYO YUDEN)
(Ceramic)
(Ceramic)
L:
C IN :
C L :
4.7 μ H
4.7 μ F
10 μ F
(NR4018, TAIYO YUDEN)
(Ceramic)
(Ceramic)
● XC9235/XC9236/XC9237D, F Series (Output Voltage External Setting)
<Setting for Output Voltage>
Output voltage can be set externally by adding two resistors to the FB pin. The output voltage is calculated by the R FB1 and
R FB2 value. The total of R FB1 and R FB2 is usually selected less than 1M ? .
Output voltages can be set in the range of 0.9V to 0.6V by use of 0.8V ± 2.0% reference voltage. However, when input
voltage (V IN ) is lower than the setting output voltage, output voltage (V OUT ) can not be higher than the input voltage (V IN ).
V OUT =0.8 × (R FB1 +R FB2 )/R FB2
The value of the phase compensation speed-up capacitor C FB is calculated by the formula of f ZFB = 1/(2× π ×C FB ×R FB1 ) with
f ZFB <10kHz. For optimization, f ZFB can be adjusted in the range of 1kHz to 20kHz depending on the inductance L and
the load capacitance C L which are used.
【 Formula 】
When R FB1 =470k ? and R FB2 =150k, V OUT1 =0.8 × (470k+150k) / 150k=3.3V
【 Example 】
V OUT
(V)
RFB1
(k ? )
RFB2
(k ? )
CFB
(pF)
V OUT
(V)
RFB1
(k ? )
RFB2
(k ? )
CFB
(pF)
0.9 100
1.2 150
1.5 130
1.8 300
820
300
150
240
150
100
220
150
2.5
3.0
3.3
4.0
510
330
470
120
240
120
150
30
100
150
100
470
12/34
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