Features: * OVER-VOLTAGE PROTECTION AND LOCKOUT: 12V,5V, and 3.3V Supplies
*OVER-CURRENT PROTECTION AND LOCKOUT:12V, 5V, and 3.3V Supplies
*UNDER-VOLTAGE PROTECTION AND LOCKOUT: 12V Supplies
*UNDER-VOLTAGE DETECT: 5V and 3.3V Supplies
*FAULT-PROTECTION OUTPUT WITH OPENDRAIN OUTPUT STAGE
*OPEN-DRAIN, POWER-GOOD OUTPUT SIGNAL:Monitors PowerGood Signal Input 3.3V and 5V Supplies
*300ms POWER-GOOD DELAY
*75ms DELAY: 5V, 3.3V Power-Supply Short-Circuit Turn-On Protection
*2.3ms PSON CONTROL TO FPO TURNOFF DELAY
*38ms PSON CONTROL DEBOUNCE
*WIDE SUPPLY VOLTAGE RANGE: 4.5V to 15V
SpecificationsSupply Voltage, VDD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 16V
Voltage on PSON , IS5, IS33, PGI . . . . . . . . . . . . . . .. . . . . . .. . . . 8V
Voltage on VS33, VS5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 16V
Voltage on FPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 16V
PGO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3V to 16V
Continuous Total Power Dissipation . . . See Dissipation Rating Table
Operating Free-Air Temperature Range, TA . . . . . . . . . 40 to 85
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . 65 to 150
Soldering Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260Description The TPS3514 is a PC switching power-supply system monitor with minimum external components. TPS3514 provides under-voltage lockout (UVLO), over-voltage (OV), under-voltage (UV),over-current (OC), protection circuits, power-good indicator, and on/off control.
UVLO thresholds are 4.45V (on) and 3.65V (off). Over-current protection (OCP) and over-voltage protection (OVP) monitor 3.3V, 5V, and 12V supplies. When an OC or OV condition is detected,the powergood output (PGO) is asserted LOW and the fault protection output (FPO) is latched HIGH. PSON from LOW-to-HIGH resets the latch. The OCP function will be enabled 75ms after PSON goes LOW with PGI HIGH and a debounce of typically 38ms. A built-in 2.3ms delay with 38ms debounce from PSON to FPO output is enabled at turnoff.An external resistor is connected between the RI pin and the GND pin. This will program a precise I(REF) for OCP function. The programmable I(REF) range is from 12.5 A to 62.5 A. Three OCP comparators and the I(REF) section are supplied by VS12. The current draw from the VS12 pin is less than1mA.The powergood feature monitors PGI, the 3.3V and 5V supplies,and issues a powergood signal when the output is ready. The TPS3514 is characterized for operation from 40°C to 85°C.The TPS3514 is available in DIP-14 and SO-14 packages.
TPS3514 Data Sheet
