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参数资料
| 型号： | XC8101AA01NR-G |
| 厂商： | Torex Semiconductor Ltd |
| 文件页数： | 7/37页 |
| 文件大小： | 0K |
| 描述： | IC HIGH SIDE LOAD SWITCH SSOT24 |
| 标准包装： | 3,000 |
| 类型： | 高端开关 |
| 输出数： | 1 |
| Rds（开）： | 900 毫欧 |
| 内部开关： | 是 |
| 电流限制： | 300mA |
| 输入电压： | 1.8 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-82 |
| 供应商设备封装： | 24-SSOT |
| 包装： | 带卷 (TR) |
| 其它名称： | XC8101AA01NR XC8101AA01NR-ND |
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XC8101
Series
■ OPERATIONAL EXPLANATION
<CE Pin>
The XC8101 enables an output P-channel MOSFET switch and the IC internal circuitry to turn off by the signal to the CE pin. In
the shutdown mode, the V OUT pin will be pulled down to the V SS by the C L auto-discharge function.
The output voltage becomes unstable when the CE pin is opened. If the input voltage to the CE pin is within the specified
threshold voltages, the logic is fixed and the XC8101 will operate normally. However, supply current may increase as a result
of the shoot-through current of internal circuitry when the medium level voltage is input to the CE pin.
＜ Input Capacitor ＞
The XC8101 works well without an output capacitor （ C L ） . However, an output capacitor such as a bypass capacitor is tied up
to the output side of the IC, input voltage ringing may occur when the IC is turned on. In order to reduce the ringing, an input
capacitor with the value of 1 μ F or more is requested to attach between V IN pin and V SS pin. The capacitor should be tied and
placed as close as the IC.
<CL Auto-Discharge Function>
The XC8101A contains a C L auto-discharge resistor and an N-channel transistor between the V OUT pin and the V SS pin. The
XC8101A quickly discharge the electric charge in the output capacitor (C L ) when a low signal to the CE pin is input to turn off a
whole IC circuit. . The C L auto-discharge resistance is set at 900 Ω (V OUT =4.0V TYP. @ V IN =4.0). Discharge time of the output
capacitor (C L ) is determined by a CL auto-discharge resistor value (R DCHG ) and an output capacitor value. Time constant τ is
defined as ( τ = C x R DCHG ). Output voltage after starting discharge can be calculated by the following formula.
V = V OUT x e –t/ τ , or t= τ In (V OUT / V)
V: Output voltage after starting discharge
V OUT: Output voltage
t: Discharge time
τ : Output discharge resistor value Rdischg × Output capacitor (C L ) value C
<Current Limiter, Short-Circuit Protection>
The XC8101 series contains a constant current limiter and foldback current circuitry. The constant current limiter operates to
limit output current and the foldback current circuitry operates as short circuit protection for the output pin.
When the load current reaches the limit current, the constant current limiter operates and the output voltage drops. The output
voltage further, then the foldback current circuitry operates to decrease the output current. When the output pin is short-circuited
to the ground, the output current drops and maintains a flow about 30mA.
■ NOTES ON USE
1.
2.
3.
Please use this IC within the stated absolute maximum ratings. Operation beyond these limits may cause degrading or
permanent damage to the device.
The X8101 goes into an undefined operation when the CE pin is left open. The CE pin shall be tied to low or high level.
V OUT pin voltage should not be applied beyond the V IN pin voltage. The IC may get damage due to the reverse current
toward the V IN pin.
7/37
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