1 Features

• Qualified for Automotive Applications
• Power-On Reset Generator With Adjustable Delay Time: 1.25 ms to 10 s
• Very Low Quiescent Current: 2.4 μA Typical
• High Threshold Accuracy: 0.5% Typical
• Fixed Threshold Voltages for Standard Voltage Rails From 1.2 V to 5 V and Adjustable Voltage Down to 0.4 V Are Available
• Manual Reset (MR) Input
• Open-Drain RESET Output
• Temperature Range: –40°C to +125°C
• Small SOT-23 Package and WSON Package (TPS3808G01QDRVRQ1 only)

2 Applications

• DSP or Microcontroller Applications
• FPGA and ASIC Applications
• Automotive Vision
• Automotive Radar

3 Description

The TPS3808Gxx-Q1 microprocessor supervisory circuits monitor system voltages from 0.4 V to 5 V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and MR return above their thresholds.

The TPS3808Gxx-Q1 device uses a precision reference to achieve 0.5% threshold accuracy for V_IT ≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the C_T pin, 300 ms by connecting the C_T pin to V_DD using a resistor, or can be user-adjusted from 1.25 ms to 10 s by connecting the C_T pin to an external capacitor. The TPS3808Gxx-Q1 has a very low typical quiescent current of 2.4 μA, so it is well suited for battery-powered applications. The device is available in a small SOT-23 package (one option available in WSON) and is fully specified over a temperature range of –40°C to +125°C (T_J).

For more information about TI's voltage supervisor portfolio, visit the Supervisor and Reset IC Overview Page page.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application Schematic