Texas Instruments Introduced Nano 125 nA I_Q, 1% Accurate Voltage Supervisor, Push-Button Monitor with Programmable Sense and Reset Delay

Texas Instruments introduced nano-I_Q, precision voltage supervisor TPS3899 that monitors system voltages or pushbutton inputs as low as 0.51 V. When the voltage of SENSE drops below the V_IT- threshold, /RESET will toggle after the programmed sense delay, set by CTS, has been reached. The TPS3899 asserts an open-drain or push-pull /RESET signal to active-low logic (RESET) or active-high logic (RESET). The /RESET output remains active until the SENSE voltage returns above the rising voltage threshold (V_IT- + V_HYS) for the reset delay set by CTR.

The TPS3899 family uses a precision reference to achieve ±1% threshold accuracy. The sense delay and reset delay time can be user-adjusted by connecting a capacitor to the CTS and CTR pins respectively. The TPS3899 has a nano quiescent current of 125 nA (typ) and is available in a small 1.5- mm × 1.5-mm WSON package, making the device well-suited for battery-powered and spaceconstrained applications. The device is fully specified over a temperature range of –40 °C to +125 °C (T_A).

Typical Application Circuit.

Features

• VDD range: 0.7 V to 6 V
• Programmable sense and reset delay
• Nano quiescent current: 125 nA (typ)
• High threshold accuracy: ±0.5% (typ)
• Precision hysteresis: 5% (typ)
• Adjustable threshold voltage: 0.51 V (typ)
• Multiple output topologies
  • DL: open-drain active-low
  • PL: push-pull active-low
  • PH: push-pull active-high
• Temperature range: –40 °C to +125 °C
• Package: 1.5-mm × 1.5-mm WSON

Applications

• Electricity meters
• Building Automation
• Body Control Module (BCM)
• Data center and enterprise computing
• Notebooks, desktop computers, servers
• Smartphones, hand-held products
• Portable, battery-powered equipment
• Solid-state drives
• STB & DVR

TPS3899EVM TPS3899 Nanopower Supervisor Evaluation Module Board.