The TPS3514 is a PC switching power-supplysystem monitor with minimum external components. It 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 power-good 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 turn-off.

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 12.5µA to 62.5µA. Three OCP comparators and the I_(REF) section are supplied by VS12. The current draw from the VS12 pin is less than 1mA.

The power-good feature monitors PGI, the 3.3V and 5V supplies, and issues a power-good 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.

• Over-Voltage Protection andLockout: 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 Open-Drain Output Stage
• Open-Drain, Power-Good Output Signal: Monitors Power-Good 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 Turn-Off Delay
• 38ms PSON Control Debounce
• Wide Supply Voltage Range: 4.5V to 15V

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• Number of supplies monitored
• 3
• Threshold voltage 1 (Typ) (V)
• 2.2
• Features
• Overcurrent sense, Undervoltage and overvoltage monitor, PFI/PFO, Wide input voltage
• Reset threshold accuracy (%)
• 2.3
• Output driver type/reset output
• Active-low, Open-drain
• Time delay (ms)
• 300
• Rating
• Catalog
• Watchdog timer WDI (sec)
• None
• Operating temperature range (C)
• -40 to 85

TPS3514的完整型号有：TPS3514D、TPS3514DR、TPS3514N，以下是这些产品的关键参数及官网采购报价：

TPS3514D，工作温度：-40 to 85，封装：SOIC (D)-14，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS3514D的批量USD价格：.996（1000+）

TPS3514DR，工作温度：-40 to 85，封装：SOIC (D)-14，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网TPS3514DR的批量USD价格：.83（1000+）

TPS3514N，工作温度：-40 to 85，封装：PDIP (N)-14，包装数量MPQ：25个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：NIPDAU，TI官网TPS3514N的批量USD价格：.955（1000+）

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