TPS3850XYY

Part: TPS3850H01 — Texas Instruments

Type: Precision Voltage Supervisor with Programmable Window Watchdog Timer

Description: 1.6–6.5 V supply, 0.8% accurate window voltage supervisor (over- and undervoltage) with programmable window watchdog timer, 10 μA typical supply current, and open-drain outputs in a 3 mm × 3 mm VSON-10 package.

Operating Conditions:

• Supply voltage (VDD): 1.6–6.5 V
• Operating junction temperature (TJ): -40 to 125 °C
• SENSE, SET0, SET1 pin voltage: 0–6.5 V
• RESET and WDO pullup resistor: 1–100 kΩ (10 kΩ nominal)
• CRST and CWD capacitors: 0.1–1000 nF

Absolute Maximum Ratings:

• Max supply voltage (VDD): 7 V
• Max RESET / WDO output pin current: ±20 mA
• Max input current (all pins): ±20 mA
• Max operating junction temperature: 150 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Threshold accuracy: 0.8% on SENSE pin overvoltage and undervoltage thresholds (-40 to +125 °C)
• Supply current: 10 μA typical
• Hysteresis: 0.5%
• Fault windows: ±4% and ±7% available
• Factory-programmed RESET delay accuracy: 9.5%
• Monitored rails: 0.9 V to 5.0 V
• RESET and WDO pin current: 10 mA max (recommended)

Features:

• Precision over- and undervoltage monitoring
• User-programmable watchdog timeout and reset delay via external capacitors
• Factory-programmed precision watchdog and reset timers
• Dedicated watchdog output (WDO) for fault resolution
• Watchdog disable feature via logic pins
• Open-drain outputs

Applications:

• Ultrasound scanner
• Storage area network
• Active Antenna System mMIMO (AAS)
• Robot servo drive
• Infusion pump
• HVAC controller

Package:

• VSON-10 (DRC), 3.00 mm × 3.00 mm

• Input voltage range: VDD = 1.6 V to 6.5 V
• 0.8% Voltage threshold accuracy
• Low supply current: I DD = 10 μA (typical)
• User-programmable watchdog timeout
• User-programmable reset delay
• Factory-programmed precision watchdog and reset timers
• Open-drain outputs
• Precision over- and undervoltage monitoring:
• -Supports common rails from 0.9 V to 5.0 V
• -±4% and ±7% Fault windows available
• -0.5% Hysteresis
• Watchdog disable feature
• Available in a small 3-mm × 3-mm, 10-Pin VSON package
• Junction operating temperature range: -40°C to +125°C

• Ultrasound scanner
• Storage area network
• Active Antenna System mMIMO (AAS)
• Robot servo drive
• Infusion pump
• HVAC controller

Fully Integrated Microcontroller Supervisory Circuit

Figure 5-1. DRC Package: TPS3850 3-mm × 3-mm VSON-10 Top View

at 1.6 V ≤ V DD ≤ 6.5 V over the operating temperature range of -40°C ≤ TJ ≤ +125°C (unless otherwise noted); the open-drain pullup resistors are 10 kΩ for each output; typical values are at T J = 25°C

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over operating free-air temperature range (unless otherwise noted) (1)

• (2) TJ = TA as a result of the low dissipated power in this device.

(3) The absolute maximum rating is VDD + 0.3 V or 7.0 V, whichever is smaller.

over operating free-air temperature range (unless otherwise noted)

The following sections describe in detail proper device implementation, depending on the final application requirements.