TPS3700QDSERQ1 - 18V Automotive Window Comparator | TI
MPN: TPS3700QDSERQ1 ✓ ActiveTPS3700QDSERQ1 Overview
A window voltage detector is a comparator-based power management IC that compares a monitored voltage against programmed upper and lower limits. It belongs to the hierarchy of voltage supervisors, reset controllers, comparators, and power management semiconductors. Unlike a simple undervoltage detector, a window detector identifies both excessive and insufficient voltage conditions, making it useful when a protected system must remain operational only within a defined supply range.
The TPS3700-Q1 uses two comparators referenced to a common 400 mV internal source. External resistor networks scale the monitored voltage to the comparator inputs, allowing the designer to establish overvoltage and undervoltage thresholds. Its two open-drain outputs can be pulled up to 18 V, making the interface suitable for automotive electrical environments where fault signaling must remain compatible with higher-voltage logic or system rails.
The monitored signal may also be divided so that both comparators operate against the same internal reference. This architecture supports window supervision or independent upper- and lower-threshold monitoring. Because the outputs are open-drain, their final voltage is determined by the pull-up network rather than the device itself. Suitable pull-up values and logic levels must therefore be selected against the automotive system architecture and system-level requirements.
Typical uses include monitoring an 18 V automotive supply, detecting excursions above and below an acceptable operating range, supervising a downstream power-conversion stage, and generating fault signals for a vehicle controller. The -40°C to +125°C temperature range makes the device appropriate for applications exposed to automotive temperature extremes when its qualification and operating requirements are satisfied for the specific design.
Designers should confirm the exact comparator polarity, delay, hysteresis, supply requirements, and pin behavior against the manufacturer datasheet before release. External resistors also determine threshold accuracy and sensitivity to resistor tolerance, leakage, and noise. Open-drain traces should be routed away from noisy power stages, and pull-ups should be placed close to the output pins to limit susceptibility to board-level coupling.
This page consolidates verified manufacturer and distributor information, package details, pricing references, and engineering-oriented selection guidance. It also distinguishes genuine same-footprint alternatives from cross-package parts, helping engineers identify replacement options without assuming that similar voltage-detector functions guarantee PCB compatibility.
Drop-in alternatives for TPS3700QDSERQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS3700QDSERQ1 (same form factor and footprint) — differing in Output Type, Package, Product Type.
TPS3700DSER
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →TPS3702QDSERQ1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS3703QDSERQ1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS3700QDSERQ1 Maximum Ratings & Electrical Characteristics
| Product Type | Automotive high-voltage window voltage detector |
| Comparator Count | 2 high-accuracy comparators |
| Internal Reference Voltage | 400 mV |
| Output Type | 2 open-drain outputs |
| Open-Drain Output Voltage Rating | 18 V |
| Maximum Monitored Voltage Context | 18 V device class |
| Threshold Configuration | External resistor networks |
| Operating Modes | Window detector or two independent voltage monitors |
| Operating Temperature Range | -40°C to +125°C |
| Package | 6-pin WSON (DSE), 1.5 mm × 1.5 mm |
| Mounting Type | Surface mount |
| Automotive Qualification | Automotive product |
TPS3700QDSERQ1 6-pin wson (dse), 1.5 mm × 1.5 mm Pin Configuration Guide
Pin configuration for TPS3700QDSERQ1 (6-pin wson (dse), 1.5 mm × 1.5 mm package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for TPS3700QDSERQ1.
Refer to the datasheet for full pin configuration.
Typical Applications
TPS3700QDSERQ1 is suitable for 6 applications: Automotive 18 V Rail Window Supervision, Battery Management System Fault Detection, DC-DC Converter Input Protection, Automotive ECU Power-Good Signaling, Overvoltage and Undervoltage Diagnostic Reporting, Industrial and Transportation 18 V Power Systems.
Automotive 18 V Rail Window Supervision
The TPS3700QDSERQ1 fits automotive rail supervision because it combines two high-accuracy comparators, a 400 mV internal reference, and two open-drain outputs rated to 18 V in the 6-pin WSON DSE package. External resistor networks can establish separate lower and upper limits for an 18 V system rail, allowing the controller to identify both undervoltage and overvoltage conditions. Its -40°C to +125°C operating range addresses the temperature span of demanding vehicle environments. The open-drain fault outputs support wired-AND signaling to a vehicle domain controller or safety monitor, although pull-up levels, timing, hysteresis, and exact comparator polarity must be confirmed from the manufacturer datasheet.
Recommended
Battery Management System Fault Detection
TPS3700QDSERQ1 can monitor a battery-management input or intermediate automotive supply when both excessive and insufficient voltage must be distinguished. The two-comparator architecture uses a common 400 mV reference, while external resistors scale the monitored voltage to the threshold inputs. Two independent open-drain outputs provide separate fault indications to a battery-management controller, enabling diagnostics beyond a simple undervoltage alarm. The device is suitable for an 18 V-class power environment, but resistor tolerance and comparator accuracy directly influence the detected boundaries, so production thresholds should include worst-case margin and be checked across temperature.
Recommended
DC-DC Converter Input Protection
The TPS3700QDSERQ1 can supervise the input to an automotive DC-DC converter and flag a voltage outside the converter's acceptable operating window. Its two open-drain outputs rated to 18 V permit fault signals to be pulled up to a compatible system rail, while the 400 mV internal reference supports thresholding through external resistor networks. Placing the detector near the protected supply allows the controller to shut down a downstream converter before persistent undervoltage or overvoltage causes unreliable operation. The detector itself does not disconnect the load, so the system must define how its fault outputs trigger shutdown, reset, or degraded-mode control.
Recommended
Automotive ECU Power-Good Signaling
TPS3700QDSERQ1 supports power-good and voltage-valid supervision around an automotive electronic control unit. The lower comparator can identify a rail that has fallen below its operating limit, while the upper comparator can detect an excessive excursion. Their open-drain outputs can be wired together or routed separately to a digital controller, providing a compact way to qualify a rail before enabling loads. Because the outputs are open-drain, their rising voltage depends on external pull-ups, which should match the receiving logic. Designers should also verify input common-mode limits, startup behavior, and delay because those parameters are not fully present in the verified excerpts.
Recommended
Overvoltage and Undervoltage Diagnostic Reporting
The TPS3700QDSERQ1 is useful when a diagnostic system must distinguish two failure directions instead of reporting only a low-voltage condition. Each comparator can use its own resistor network, allowing separate upper and lower thresholds around the expected operating voltage. The resulting open-drain signals can feed diagnostic inputs, power-sequencing logic, or a fault latch. The shared 400 mV reference provides the comparison basis for both channels. Engineering validation should include resistor-tolerance analysis, leakage effects, transient behavior, and logic thresholds at the system's minimum and maximum supply conditions before the diagnostic windows are frozen.
Recommended
Industrial and Transportation 18 V Power Systems
TPS3700QDSERQ1 can also monitor nominal 18 V power systems outside a passenger vehicle, including transportation, industrial-control, and high-voltage DC distribution equipment where a compact window detector is valuable. Its -40°C to +125°C temperature range and 1.5 mm × 1.5 mm WSON DSE footprint support space-constrained boards. The two 18 V open-drain outputs can report upper and lower threshold violations to a supervisory controller. Use the automotive-qualified ordering variant only when the broader automotive qualification requirements are appropriate for the end product, and confirm all electrical limits against the latest manufacturer documentation.
Recommended
Recommended Products Summary
Engineering reference data for TPS3700QDSERQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS3700DSER | TPS3702QDSERQ1 | TPS3703QDSERQ1 |
|---|---|---|---|---|
| Package | 6-WSON (DSE), 1.5 mm × 1.5 mm | 6-WSON (DSE) | 6-WSON (DSE) | 6-WSON (DSE) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Automotive high-voltage window voltage detector | High-voltage window voltage detector | Automotive window voltage detector | Automotive window voltage detector |
| Automotive Ordering Option | Q1 | Non-Q1 ordering designation | Q1 | Q1 |
Key Differentiators
- Combined overvoltage and undervoltage detection (vs TPS3702QDSERQ1)
- 18 V open-drain fault outputs (vs TPS3703QDSERQ1)
- Compact 1.5 mm × 1.5 mm WSON footprint (vs TPS3700DSER)
- Explicit automotive ordering option (vs TPS3700DSER)
Design Notes
Treat the TPS3700QDSERQ1 as a detection device rather than a power-path regulator. Its two open-drain outputs can sink fault currents but do not actively interrupt the monitored rail, so the system controller or an upstream protection circuit must respond to a fault indication. Select pull-up resistors to match the receiving logic voltage and ensure that the resulting output rise time remains acceptable for the receiving circuit. The open-drain outputs are rated to 18 V, but the complete absolute-maximum rating must be confirmed from the manufacturer datasheet before attaching them to a higher-voltage rail.
Do not substitute a part merely because it is described as a window comparator. Verify the DSE 6-pin land pattern, terminal functions, comparator polarity, internal reference, threshold accuracy, response time, and operating-temperature limits. TPS3700DSER is the closest same-family ordering alternative, while TPS3702 and TPS3703 may differ in threshold and response characteristics. Because the verified excerpts do not provide a full parameter table for those alternatives, a footprint match alone is not sufficient evidence of functional interchangeability.
Place the TPS3700QDSERQ1 close to the monitored supply and keep the high-impedance threshold-resistor network compact. Route comparator-input and open-drain-output traces away from switching nodes, inductors, and high-current return paths. The WSON DSE package is only 1.5 mm × 1.5 mm, so pad and via dimensions must be taken from the current Texas Instruments package drawing rather than inferred from a generic WSON footprint. Confirm the exposed thermal-pad connection and assembly requirements in the manufacturer land-pattern data.
Threshold accuracy depends on the external resistor network as well as the internal 400 mV reference. Include resistor tolerance, temperature coefficient, comparator offset, input bias current, and leakage when calculating the worst-case upper and lower detection boundaries. Add deliberate guard bands around the allowed supply range so normal transients do not create false faults. The verified data does not specify input current, offset, hysteresis, or response time, so these parameters must be obtained from the manufacturer datasheet before production release.
Compliance Information
The verified sources identify TPS3700QDSERQ1 as an automotive product, but the supplied excerpts do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields therefore remain unknown rather than being inferred.
