TPS3700QDDCRQ1 - 18V Automotive Window Comparator | Texas Instruments
MPN： TPS3700QDDCRQ1 ✓ 啟用中TPS3700QDDCRQ1 概覽
An automotive window comparator is a type of voltage monitor that checks whether a supply voltage remains between an adjustable lower threshold and an adjustable upper threshold. The TPS3700-Q1 family combines two comparators with an internal reference, allowing the monitored voltage to be set by external resistors. It can therefore operate as a combined window detector or as two independent voltage monitors, depending on the external resistor and output configuration.
Key features include a wide 1.8 V to 18 V supply range, adjustable thresholds down to 400 mV, low quiescent current, high threshold accuracy, and two open-drain outputs rated to 18 V. The independent undervoltage and overvoltage outputs provide flexibility for system reset, regulator shutdown, load disconnect, or fault signaling. The automotive qualification of the Q1 suffix makes the device suitable for harsh operating environments when the surrounding automotive qualification requirements are met.
Internally, the device uses two high-accuracy comparators referenced to a common 400 mV internal reference. External resistor networks scale the monitored voltage down to the comparator input range, while the threshold accuracy is maintained over the specified supply and temperature conditions. The open-drain outputs require pull-up resistors and can be wired independently or combined through appropriate logic to create a single fault indication.
Typical applications include automotive battery and rail monitoring, low-voltage reset signaling for body-control modules, regulator enable sequencing, infotainment supply supervision, and protection of external circuitry from overvoltage or undervoltage conditions. The 18 V capability is useful when monitoring automotive electrical systems, although the monitored supply and pull-up networks must remain within their specified limits.
Designers should verify the external resistor values, threshold tolerance, pull-up voltage, output logic polarity, and maximum monitored voltage against the manufacturer datasheet. The open-drain outputs should not be used without suitable pull-up resistors. Because the Q1 device is intended for automotive systems, PCB layout should minimize noise coupling around the high-impedance comparator inputs and provide adequate copper for the small SOT-23-THIN package.
This product page combines verified manufacturer and distributor information, practical application guidance, package information, and a comparison framework for engineers evaluating window comparators. It distinguishes documented electrical facts from parameters that still require design-specific verification, helping procurement and hardware teams identify the correct device without relying on unsupported cross-reference claims.
直接替換替代品，適用於 TPS3700QDDCRQ1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TPS3700QDDCRQ1 （相同外形與佔位） — 差異在於 Output Type, Package, Product Type, RoHS Status, Supply Voltage Range.
TPS3700DDCT
✅ 直接替換聯絡詢價
查看資料表 →TPS3701DDCR
✅ 直接替換聯絡詢價
查看資料表 →TPS3702CX12DDCR
✅ 直接替換📋 參考替代品（不在目錄中）
TPS3703
✅ 直接替換📋 參考替代品（不在目錄中）
TPS3702
✅ 直接替換📋 參考替代品（不在目錄中）
TPS3700QDDCRQ1 最大額定值與電氣特性
| Product Type | Automotive high-voltage window voltage detector |
| Supply Voltage Range | 1.8 V to 18 V |
| Internal Reference | 400 mV |
| Comparator Count | 2 |
| Threshold Adjustment | Adjustable down to 400 mV |
| 輸出類型 | Open-drain |
| Output Rating | 18 V |
| Overvoltage Detection | Yes |
| Undervoltage Detection | Yes |
| 工作溫度範圍 | -40°C to +125°C |
| 封裝 | 6-pin SOT-23-THIN (DDC) |
| 安裝類型 | Surface mount |
| Qualification | Automotive |
| RoHS 狀態 | Compliant |
| MSL 等級 | MSL Level 2, 260°C, 1 year |
| Output Pull-Up Requirement | External pull-up resistors required |
| 腳位數 | 6 pins |
TPS3700QDDCRQ1 6-pin sot-23-thin (ddc) 腳位配置指南
TPS3700QDDCRQ1（6-pin sot-23-thin (ddc) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： TPS3700QDDCRQ1.
請參閱 資料表 以查看完整腳位配置。
典型應用
TPS3700QDDCRQ1 適用於 6 應用s: Automotive Battery Rail Monitoring, Regulator Enable and Sequencing, Body Control Module Supply Supervision, Infotainment and Telematics Rail Protection, Industrial 24 V Input Protection, Power-Sequence Fault Signaling.
Automotive Battery Rail Monitoring
The TPS3700QDDCRQ1 fits automotive battery-rail supervision because it combines a 1.8 V to 18 V supply range, two high-accuracy comparators, and separate 18 V-rated open-drain outputs. External resistors can scale the monitored rail to the 400 mV internal reference, allowing separate overvoltage and undervoltage decisions around the acceptable battery range. The open-drain outputs can directly pull down system fault or reset lines when external pull-ups are provided. Its -40°C to +125°C rating and automotive identification also align with vehicle thermal and qualification requirements. Designers should validate the divider ratio against the lowest and highest battery voltages, account for resistor tolerance, and keep the monitored voltage and pull-up rails within the absolute maximum limits stated by Texas Instruments.
推薦
Regulator Enable and Sequencing
The TPS3700QDDCRQ1 can supervise a regulated intermediate rail and generate open-drain fault signals for regulator enable or sequencing logic. Its undervoltage and overvoltage comparators operate from a common 400 mV reference, while externally selected resistors establish independent detection points. Because the outputs are open-drain, separate pull-ups permit fault assertions for both undervoltage and overvoltage conditions. This arrangement can prevent a downstream converter, processor, or communications module from operating outside its valid input range. The implementation should include hysteresis or suitable external filtering where required, verify the comparator polarity during power transitions, and confirm that the fault signals cannot violate downstream enable-pin limits. The device's automotive qualification makes it especially relevant to body, powertrain, and chassis electronic modules.
推薦
Body Control Module Supply Supervision
The TPS3700QDDCRQ1 is suitable for body-control and vehicle electronics that must identify an out-of-range supply from separate overvoltage and undervoltage viewpoints. The 18 V capability accommodates higher automotive electrical rails, while the 400 mV reference and external resistor networks allow monitoring of both primary and auxiliary supplies. Its two open-drain outputs can be routed to a microcontroller interrupt, a power mux, or a load-switch enable without requiring a push-pull output stage. For robust implementation, place the divider network close to the device, keep comparator-input traces away from switching nodes, and include an external pull-up rated for the intended logic rail. The exact monitoring windows, reset delay, and automotive qualification requirements must be validated against the system specification and manufacturer datasheet.
推薦
Infotainment and Telematics Rail Protection
The TPS3700QDDCRQ1 can protect infotainment, connectivity, and telematics subsystems from supply excursions by comparing their rails with independently programmed upper and lower thresholds. The dual-comparator architecture reduces the need for separate detector functions when both overvoltage and undervoltage protection are required. Its open-drain fault outputs can be pulled up to the local logic rail and combined in a controller input, while the 1.8 V to 18 V operating range supports low-voltage logic domains and automotive intermediate supplies. A practical design should account for automotive load dump transients separately from steady-state monitoring, verify transient protection ahead of the detector, and avoid placing excessive capacitance on the resistor-divider nodes. Its -40°C to +125°C operating range supports demanding vehicle environments.
推薦
Industrial 24 V Input Protection
Although the TPS3700QDDCRQ1 is identified as an automotive high-voltage detector, its 1.8 V to 18 V operating and open-drain output ratings make it useful in industrial systems that operate below 18 V and need threshold-based protection. Two comparators can supervise separate upper and lower limits, while external resistors adapt the monitored rail to the internal 400 mV reference. For a 24 V nominal industrial bus, the device cannot be connected directly without suitable attenuation and must remain within its documented absolute maximum ratings. Transient suppression, galvanic isolation, and surge protection should be implemented before the monitoring network. Engineers should also verify whether the automotive-qualified temperature and qualification profile matches the industrial system's reliability requirements.
推薦
Power-Sequence Fault Signaling
The TPS3700QDDCRQ1 can participate in power-sequence supervision by detecting when one or more rails are below or above acceptable limits and asserting separate open-drain fault indications. This is useful when a controller must not continue operating until its supplies are valid, or when a downstream load must be disconnected during a fault. The two outputs allow undervoltage and overvoltage events to be handled independently, and external pull-ups make the signaling level compatible with the receiving logic. Designers should define the required sequence timing in firmware or surrounding logic, ensure the outputs remain valid during startup, and check the effect of resistor tolerance on both trip points. The small SOT-23-THIN package also allows placement close to the monitored divider network for improved noise immunity.
推薦
推薦產品摘要
工程參考資料，適用於 TPS3700QDDCRQ1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS3700DDCT | TPS3701DDCR | TPS3702CX12DDCR | TPS3703 | TPS3702 |
|---|---|---|---|---|---|---|
| Package | SOT-23-THIN (DDC), 6 pins | SOT-23-THIN (DDC), 6 pins | SOT-23-THIN (DDC), 6 pins | SOT-23-THIN (DDC), 6 pins | SOT-23-THIN (DDC), 6 pins | SOT-23-THIN (DDC), 6 pins |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
主要差異化特點
- Automotive-qualified option within the six-pin TPS370x family (對比TPS3700DDCT)
- Dedicated independent overvoltage and undervoltage outputs (對比TPS3701DDCR)
- 18 V output and supply capability for automotive intermediate rails (對比TPS3702CX12DDCR)
設計說明
Use external pull-up resistors on both open-drain outputs and verify that the pull-up supply, voltage, and sink-current requirements are compatible with the TPS3700QDDCRQ1. The outputs are rated to 18 V, but that rating does not mean an external pull-up can safely exceed the device's supply or absolute-maximum limits. Check the manufacturer datasheet for the permitted output voltage, input voltage, and quiescent-current behavior before selecting resistor values.
Place the TPS3700QDDCRQ1 and its threshold-setting resistor network close together and away from switching nodes and high-current return paths. The comparator inputs are connected to scaled versions of the monitored voltage, so long traces can pick up noise and alter the trip point. Use a compact layout, maintain a continuous ground reference, and follow the pin configuration and layout guidance in the Texas Instruments datasheet when assigning the six DDC pins.
Do not assume that two open-drain outputs automatically create a single active-high or active-low window fault. Each output has its own comparator and threshold, so define the desired undervoltage and overvoltage logic explicitly. Also account for resistor tolerance, input offset, temperature variation, and startup transients when establishing the monitored limits. The Q1 suffix identifies the automotive-qualified option, while a non-Q1 ordering variant may not satisfy the same qualification requirement.
If the monitored rail is subject to automotive load dump or other severe transients, place suitable transient protection ahead of the resistor divider and confirm that the attenuated input remains within the device's operating and absolute-maximum limits. The detector should not be treated as the sole surge-protection component. Validate the complete input network in-circuit because long external-divider nodes and poor grounding can increase susceptibility to conducted and radiated automotive noise.
合規資訊
The verified product information identifies TPS3700QDDCRQ1 as an automotive-qualified TPS3700-Q1 variant. The supplied cross-reference data states ROHS3 compliant and MSL Level 2, 260°C, 1 year. No verified REACH, lead-free, halogen-free, or conflict-minerals statement was provided, so those fields remain unknown.
