TPS3828-33DBVR SOT-23-5 Integrated Circuit Voltage Monitor with Watchdog Timer
Description
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 VDD becomes greater than 1.1V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET active low as long as VDD remains less than the threshold voltage, VIT−. An internal timer delays the return of the output to the inactive state (high) to make sure proper system reset. The delay time, td, starts after VDD has risen above the threshold voltage (VIT− + VHYS). When the supply voltage drops below the threshold voltage VIT−, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed-sense threshold voltage, VIT–, set by an internal voltage divider. The TPS382x family also offers watchdog time out options of 200ms (TPS3820) and 1.6s (TPS3823, TPS3824, and TPS3828).
Parameters
Number of supplies monitored: 1
Threshold voltage 1 (typ) (V): 2.93, 4.55
Features : Manual reset capable, Watchdog timer
Reset threshold accuracy (%): 2.4
Iq (typ) (mA) : 0.015
Output driver type/reset output : Active-low, Open-drain
Time delay (ms): 200
Watchdog timer WDI (s) : 1.6
Supply voltage (min) (V): 1.1
Supply voltage (max) (V): 5.5
Operating temperature range (°C): -40 to 85
Applications
• DSPs, microcontrollers, or microprocessors
• Industrial equipment
• Programmable controls
• Portable and battery-powered equipment
• Wireless communications systems
• Notebook and desktop computers
Resources.