TPS3828-50DBVR

The TPS382x family of supervisors provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET asserts when the supply voltage V_DD becomes greater than 1.1 V. Thereafter, the supply voltage supervisor monitors V_DD and keeps RESET active low as long as V_DD remains less than the threshold voltage, V_IT−. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, t_d, starts after V_DD has risen above the threshold voltage (V_IT− + V_HYS). When the supply voltage drops below the threshold voltage V_IT−, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage, V_IT–, set by an internal voltage divider. The TPS382x family also offers watchdog time out options of 200 ms (TPS3820) and 1.6 s (TPS3823, TPS3824, and TPS3828).

Key Features

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