TPS3813I50

Features:

􀀀 Window-Watchdog With Programmable Delay and Window Ratio
􀀀 6-Pin SOT-23 Package
􀀀 Supply Current of 9 A (Typ)
􀀀 Power On Reset Generator With a Fixed Delay Time of 25 ms
􀀀 Precision Supply Voltage Monitor 2.5 V, 3 V,3.3 V, 5 V
􀀀 Open-Drain Reset Output
􀀀 Temperature Range . . . 40°C to 85°C


Application

􀀀 Applications Using DSPs, Microcontrollers,or Microprocessors
􀀀 Safety Critical Systems
􀀀 Automotive Systems
􀀀 Heating Systems


Pinout




Specifications

Supply voltage, VDD (see Note1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
All other pins (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 7 V
Maximum low output current, IOL . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 mA
Maximum high output current, IOH  . . . . . . . . . . . . . . . . . . . . . . . . 5 mA
Input clamp current, IIK (VI < 0 or VI > VDD). . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VDD)  . . . . . . . . . . . . ±20 mA
Continuous total power dissipation   . . . . . . See Dissipation Rating Table
Operating free-air temperature range, TA . . . . . . . . . . . 40°C to 85°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . 65°C to 150°C
Soldering temperature   . . . . . . .  . . . . . . .  . . . . . . . . . . . . . . . . . 260°C


Description

The TPS3813 family of supervisory circuits provides circuit initialization and timing supervision,primarily for DSPs and processor-based systems.

During power on, RESET is asserted when supply voltage (V_DD) becomes higher than 1.1 V. There after, the supervisory circuit of TPS3813monitors V_DD and keeps RESET active as long as VDD remains below 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, td = 25 ms typical, starts after VDD has risen above the threshold voltage (V_IT). 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.