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| 型号： | TLE7368-2E |
| 厂商： | Infineon Technologies |
| 文件页数： | 27/41页 |
| 文件大小： | 0K |
| 描述： | IC PS SYSTEM MULTI VOLT PGDSO-36 |
| 标准包装： | 1,000 |
| 应用： | 电源，汽车应用 |
| 输入电压： | 4.5 V ~ 45 V |
| 输出数： | 3 |
| 输出电压： | 5V，3.3V，1.2V |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSSOP（0.433"，11.00mm 宽）裸露焊盘 |
| 供应商设备封装： | PG-DSO-36 |
| 包装： | 带卷 (TR) |
| 其它名称： | SP000768086 TLE73682EXUMA1 |
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TLE7368
Detailed Internal Circuits Description
5.4
Power Up and Power Down Sequencing
In a supply system with multiple outputs the sequence of enabling the individual regulators is important. Especially
32-bit microcontrollers require a defined power up and power down sequencing. Figure 4 shows the details for
the power up and power down sequence of the TLE7368.
At power up, the first circuit block to be enabled is the charge pump as it is mandatory for the other circuits to
operate. With the charge pump reaching its nominal value, the Buck converter starts to power up its output. Also
the output voltage the linear regulators are enabled. The three linear regulators power up simultaneously. The 5 V
regulator acts as the master, the 3.3 V/2.6 V regulator and the 1.5 V regulator follow. As the 5 V regulator powers
up also the tracking regulators follow. The ramp if the increasing output voltage of each line is determined by the
connected output capacitance, the load current and the current limit of the regulator under consideration. In
addition an integrated supervision circuit ensures the following two conditions during power-up:
-0.3 V < ( V Q_LDO1 - V Q_LDO2 ) < 3.1 V and
-0.3 V < ( V Q_LDO2 - V FB_EXT )
(1)
(2)
The power down sequence is practically vice versa to the start up procedure. With the battery decreasing to zero
the charge pump and Buck regulator will stop to operate at the minimum battery threshold, the Buck output voltage
will fall down and so will the outputs of the linear regulators.
In the event where the device is disabled, EN_IGN = low and EN_uC = low, the charge pump, the Buck converter
and the linear regulators are disabled immediately.
The linear regulators’ outputs are not discharged actively in any case of power down. Diode circuitry (i.e. Schottky
diodes) might be necessary to avoid violation of certain microcontrollers’ sequencing requirements.
Data Sheet
27
Rev. 2.1, 2010-11-22
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TLE73682EXT | 功能描述:直流/直流开关转换器 DC/DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TLE73682EXUMA1 | 制造商:Infineon Technologies AG 功能描述:Micro Controller Supply 36-Pin DSO 制造商:Infineon Technologies AG 功能描述:DC/DC CONVERTER - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC PS SYSTEM MULTI VOLT PGDSO-36 |
| TLE7368-3E | 功能描述:直流/直流开关转换器 DC/DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TLE73683EXT | 功能描述:直流/直流开关转换器 DC/DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TLE73683EXUMA1 | 制造商:Infineon Technologies AG 功能描述:Micro Controller Supply 制造商:Infineon Technologies AG 功能描述:DC/DC CONVERTER - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC PS SYSTEM MULTI VOLT PGDSO-36 |
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