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参数资料
| 型号： | XC6601B151MR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 11/33页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 1.5V .4A SOT25-5 |
| 标准包装： | 3,000 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 1.5V |
| 输入电压： | 最高 3 V |
| 电压 - 压降（标准）： | 0.129V @ 400mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 400mA（最小） |
| 电流 - 限制（最小）： | 400mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-25 |
| 包装： | 带卷 (TR) |
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XC6601
Series
■ OPERATIONAL EXPLANATION
<Voltage Regulator>
The voltage divided by resistors R1 & R2 is compared with the internal reference voltage by the error amplifier. The N-channel
MOSFET which is connected to the V OUT pin is then driven by the subsequent output signal. The output voltage at the V OUT pin is
controlled & stabilized by a system of negative feedback.
V BIAS pin is power supply pin for output voltage control circuit, protection circuit and CE circuit. When output current increase,
the V BIAS pin supplies output current also. VIN pin is connected to a driver transistor and provides output current.
In order to obtain high efficient output current through low on-resistance, please take enough Vgs (=V BIAS – V OUT(T) ) of the driver
transistor. Output current triggers operation of constant current limiter and fold-back circuit, heat generation triggers operation of
thermal shutdown circuit, the driver transistor circuit is forced OFF when V BIAS or V IN voltage goes lower than UVLO voltage.
Further, the IC's internal circuitry can be shutdown via the CE pin's signal.
Figure1: XC6601A series
<Low ESR Capacitor>
With the XC6601 series, a stable output voltage is achievable even if used with low ESR capacitors, as a phase compensation
circuit is built-in. The output capacitor (C L ) should be connected as close to V OUT pin and V SS pin to obtain stable phase
compensation. Values required for the phase compensation are as the table below.
For a stable power input, please connect an bias capacitor (C BIAS ) of 1.0 μ F between the V BIAS pin and the V SS pin. Also, please
connect an input capacitor (C IN ) of 1.0 μ F between the V IN pin and the V SS pin. In order to ensure the stable phase
compensation while avoiding run-out of values, please use the capacitor (C BIAS , C IN , C L ) which does not depend on bias or
temperature too much. The table below shows recommended values of C BIAS , C IN , C L .
SETTING VOLTAGE
0.7V～1.8V
BIAS CAPACITOR
C BIAS
C BIAS =1.0μF
INPUT CAPACITOR
C IN
C IN =1.0μF
OUTPUT CAPACITOR
C L
C L =4.7μF
Recommended Values of C BIAS, C IN, C L
11/33
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