TPS3820-50DBVR

The TPS382x series monitors are primarily designed to provide circuit initialization and timing supervision functions for DSP and processor-based systems. During power-up, RESET is asserted when the supply voltage VDD exceeds 1.1V. As long as VDD remains below the threshold voltage VIT-, the supply voltage monitor will monitor VDD and hold RESET active-low. An internal timer delays the output from returning to its inactive state (high) to ensure proper system reset. The delay time td begins after VDD rises above the threshold voltage (VIT- + VHYS). When the supply voltage drops below the threshold voltage VIT-, the output returns to its active state (low). No external components are required. All devices in this series have a fixed detection threshold voltage VIT- set by an internal voltage divider. The TPS382x series also offers watchdog timeout options of 200ms (TPS3820) and 1.6s (TPS3823, TPS3824, and TPS3828).

Applications

• DSP, microcontrollers, or microprocessors
• Industrial equipment
• Programmable control
• Automotive systems
• Portable and battery-powered devices
• Smart metering
• Wireless communication systems
• Laptops and desktop computers

Key features

• Power-on reset generator with fixed timeout: 200ms (TPS3823, TPS3824, TPS3825, and TPS3828) or 25ms (TPS3820)
• Manual reset input (TPS3820, TPS3823, TPS3825, and TPS3828)
• Reset output: active-low (TPS3820, TPS3823, TPS3824, and TPS3825), active-high (TPS3824 and TPS3825), and open-drain (TPS3828)
• Supply voltage monitoring: 2.5V, 3V, 3.3V, 5V
• Watchdog timer (TPS3820, TPS3823, TPS3824, and TPS3828)
• Supply current: 15μA (typical)
• 5-pin SOT-23 package
• Temperature range: -40℃ to 85℃ (-40℃ to 125℃ for TPS3823A-33)