TPS3600D25

Features:

Supply Current of 40 µ A (Max)
Precision Supply Voltage Monitor
  2.0 V, 2.5 V, 3.3V, 5.0 V
  Other Versions on Request
Watchdog Timer With 800-ms Time-Out
Backup-Battery Voltage Can Exceed VDD
Power-On Reset Generator With Fixed 100-ms Reset Delay Time
Battery OK Output
Voltage Monitor for Power-Fail or Low-Battery Monitoring
Manual Switchover to Battery-Backup Mode
Chip-Enable Gating 3 ns (at VDD  = 5 V) Max. Propagation Delay
Manual Reset
Battery Freshness Seal
14-Pin TSSOP Package
Temperature Range ...40°C to 85°C

Application

Fax Machines
Set-Top Boxes
Advanced Voice Mail Systems
Portable Battery Powered Equipment
Computer Equipment
Advanced Modems
Automotive Systems
Portable Long-Time Monitoring Equipment
Point of Sale Equipment


Pinout




Description

The TPS3600 family of supervisory circuits monitor and control processor activity. In case of power-fail or brownout conditions, the backup-battery switchover function of TPS3600 allows to run a low-power processor and its peripherals from the installed backup battery without asserting a reset beforehand.

During power on, RESET  is asserted when the supply voltage (VDD  or V BAT ) becomes higher than V res . Thereafter, the TPS3600  supply voltage supervisor monitors V OU_T  and keeps RESET  output active as long as V OU_T remains below the threshold voltage (V I_T ). An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. This delay timer starts its time-out, after V OU_T  has risen above the threshold voltage (V
I_T ). In case of a brownout or power failure of both supply sources, a voltage drop below the threshold voltage (V I_T ) get detected and the output becomes active (low) again.

The TPS3600  product spectrum is designed for supply voltages of 2 V, 2.5 V, 3.3 V, and 5 V. The circuits are available in a 14-pin TSSOP package. They are characterized for operation over a temperature range of  40° C to 85° C.