TPS65510中文资料具有集成升压转换器的低功耗电池备份 IC数据手册TI规格书

描述 Description

The TPS65510 offers a suitable solution for power switch to select the main battery or the backup battery.
This device automatically selects the power path. It depends on the voltage level of the VO_BT pin. When the main battery is removed, the power path of the VOUT pin is automatically changed from the output of 3.3-V low droppout (LDO) voltage regulator to the backup battery.
The backup battery is charged from the power path of the VRO pin (output of 3.3-V LDO) via an external diode and resistor. The input of the LDO voltage regulator comes from the internal boost converter.
The 1.2-V output LDO and 1.8-V output LDO voltage regulators have a enable pin, V_CTRL. If these outputs are not necessary, V_CTRL should be connected to AGND to save power consumption. The self-power consumption is less than 3 µA (maximum) using the backup battery.
This device has two indicators. One is CS, which monitors the voltage level of the VBAT pin and VO_BT pin. The other is XRESET, which monitors voltage level of the VOUT pin. These indicators should be connected to CPU/DSP to reset them.
This device reduces the total solution area and extends the lifetime of the backup battery.

特性 Features

• Power-Path Switch to Select Main Battery or Backup Battery for Real-Time Clock (RTC)
• Fixed Switching Frequency (PWM, 750 kHz)
• Low Power Consumption (PFM)
• Two Integrated Indicators
• XRESET: Monitors the Output voltage Level of 3.3V LDO (VOUT)
• Operating Temperature –35°C to 85°C
• Overvoltage Protection (OVP)
• Undervoltage Lockout (UVLO)
• Portable Systems With Backup Battery
PowerPAD Is a trademark of Texas Instruments.