TPS3704-Q1数据手册TI中文资料规格书

描述 Description

TPS3704x-Q1 is a low power precision window or standard voltage supervisor that can be configured as a quad, triple, dual, or single channel. Each channel has a threshold accuracy of ±1% in an 8-pin (1.6 mm x 2.9 mm) SOT-23 package offering a small solution size. The TPS3704x-Q1 includes a very accurate threshold detection, with high resolution, that is ideal for systems that operate on low-voltage supply rails and have narrow margin supply tolerances. Built-in low threshold hysteresis and fixed reset delay (tD options from 20 µs to 1200 ms) prevent false reset signals when monitoring multiple voltage rails.

TPS3704x-Q1 does not require any external resistors for setting the over and under voltage reset thresholds, which further optimizes overall high accuracy, cost, solution size, and improves reliability for safety systems. TPS3704x-Q1 functional safety compliance elevates automotive design that can meet ISO 26262 requirements and automotive safety integrity levels. Separate VDD and SENSEx pin(s) allow monitoring of rail voltages other than VDD or can be used as a push-button input. Optional use of external resistors are supported by the SENSEx pin(s). Each channel on the TPS3704x-Q1 can be customized to its own over and under voltage window detection with an upper and lower threshold tolerance that can be symmetric or asymmetric. The TPS3704x-Q1 can monitor up to four channels while maintaining an ultra-low IQ current of 5.5 µA (typ) and operates over a temperature range of -40°C to +125°C (TA).

特性 Features

Qualified for automotive applications:
• AEC-Q100 qualified with the following results:
• Device temperature grade 1: –40°C to +125°C ambient operating temperature
• Device HBM ESD classification level 2
• Device CDM ESD classification level C7B

Designed for high performance and safety:
• Input current (4-channels): IDD = 20 uA (max)
• High threshold accuracy: ±1% (max)
• Built-in precision hysteresis: VHYS (VIT > 800 mV) = ±0.75% (typ)
• Functional Safety-Compliant targeted
• Developed for functional safety applications
• Documentation to aid ISO 26262 system design will be available upon production release
• Systematic capability up to ASIL D targeted
• Hardware capability up to ASIL A targeted
• Self test - manual setup

Designed for a wide range of applications:
• Quad, triple, dual or single voltage supervisor
• TPS37044/3/2/1: 4 / 3 / 2 / 1 - channel(s)

• Input voltage range, VDD = 1.7 V to 5.5 V
• (UV / OV) threshold accuracy: ±0.25% (typ)
• Window (OV / UV), UV-only, OV-only options
• Window tolerance: ±3% to ±11%
• High Threshold Res: VIT ≤ 0.8 V: 20 mV steps VIT > 0.8 V: Lower of 0.5% or 20 mV steps

• Push-button monitor on all channels
• Reset time delay (tD): Fixed time delay options
• Options: 23-fixed time options ranging from 20 µs (min) to 1200 ms (max)

Multiple output topologies / Package type:
• TPS3704xxxO-Q1:open-drain, active-low (RESET)
• TPS3704xxxL-Q1:push-pull, active-low (RESET)
• TPS3704xxxH-Q1:push-pull, active-high (RESET)
• Package: 1.6-mm x 2.9-mm DDF (SOT-23 8-pin)