2.3.7 TPS7A65-Q1—LDO With Ultralow Quiescent Current

The TPS7A65-Q1 device is a low-dropout linear voltage regulator designed for low-power consumption and quiescent current less than 25 µA in light-load applications. This device features integrated overcurrent protection and a design to achieve stable operation even with low-equivalent series resistance (ESR) ceramic output capacitors. A low-voltage tracking feature allows for a smaller input capacitor and can possibly eliminate the requirement of using a boost converter during cold crank conditions. Because of these features, this device is well-suited in power supplies used for various automotive applications.

The TPS7A65-Q1 device is available in a thermally-enhanced power package (three-pin TO-252) and is specified for operation at temperatures from –40°C to 150°C (see Figure 8).

Key features:

• LDO 300 mV at I_OUT = 150 mA
• 4- to 40-V wide input voltage range with up to 45-V transients
• 300-mA maximum output current
• 3.3-V fixed output voltage with ±2% tolerance
• Low-ESR ceramic output stability capacitor
• Integrated fault protection
  • Short-circuit and overcurrent protection
  • Thermal shutdown
• Low input-voltage tracking