Texas Instruments TPS3707-25DGN

Overview

TPS3707-25DGN from Texas Instruments is a precision 2.25 V supply-voltage supervisor IC with active-low and active-high RESET outputs, fixed 200 ms power-on reset delay, power-fail comparator (PFI/PFO), and manual reset input (MR). It operates from 2 V to 6 V, draws ≤50 µA supply current, and is rated for –40°C to 85°C. It is used in microcontroller-based systems requiring reliable power sequencing and brownout detection.

For engineers reviewing the TPS3707-25DGN datasheet, TPS3707-25DGN pinout, TPS3707-25DGN application, or TPS3707-25DGN equivalent, key selection criteria include its dual-reset output configuration, 2.25 V threshold accuracy (±2.2% over temperature), PFI comparator input with 1.25 V reference, MSOP-PowerPAD™ 8-pin package thermal performance (RθJA = 66.1°C/W), and compatibility with legacy MAX705–MAX708 designs.

Technical Context

The TPS3707-25DGN implements a precision bandgap reference (1.25 V) feeding two independent comparators: one monitors VDD against a fixed 2.25 V threshold (VIT–) with 40 mV hysteresis, while the second compares PFI against the same 1.25 V reference. Its dual RESET outputs (active-low RESET and active-high RESET) enable direct interface with processors requiring either polarity without external inverters.

Unlike the TPS3705-xx series, the TPS3707-xx family omits the watchdog timer (no WDI/WDO pins) and instead dedicates pins to complementary reset signaling. The MR input triggers immediate reset assertion on low pulse ≥100 ns, and the PFI-to-PFO propagation delay is guaranteed ≤1 µs across temperature and supply voltage.

Key Specifications

Pinout & Package

TPS3707-25DGN is housed in an 8-pin MSOP-PowerPAD™ package (3.00 mm × 3.00 mm body, exposed thermal pad). The PowerPAD enhances thermal performance and requires PCB soldering to a thermal plane for optimal junction-to-board conduction (RθJB = 45.1°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TPS3707-25DGN, TPS3707-30DGN offers higher threshold for 3 V systems but requires PFI resistor recalculation, while MAX706RCSA+ sacrifices PFI capability and thermal efficiency for legacy pin compatibility-neither is pin- or functionally identical.

Availability

TPS3707-25DGN is available at Aetrix Electronics and suitable for industrial programmable controllers, automotive body electronics, and portable medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS3707-25DGN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of experience in high-reliability supervisory circuits.

The TPS370x-xx product line was designed specifically for robust power monitoring in DSP, microcontroller, and microprocessor systems-emphasizing precision threshold accuracy, low power, and integrated fault-detection features like PFI/PFO.

FAQ

What is the exact supply voltage threshold monitored by TPS3707-25DGN?

The TPS3707-25DGN monitors VDD against a nominal negative-going threshold voltage (VIT–) of 2.25 V, with guaranteed tolerance of 2.20 V to 2.32 V over the full –40°C to 85°C operating temperature range. This threshold is factory-trimmed and does not require external calibration or adjustment.

Does TPS3707-25DGN include a watchdog timer function?

No, the TPS3707-25DGN does not include a watchdog timer. It is part of the TPS3707-xx variant, which replaces the watchdog input/output (WDI/WDO) pins found on TPS3705-xx devices with a second RESET output (active-high). The TPS3707-25DGN provides only power-on reset, brownout detection, and power-fail monitoring.

How is the power-fail comparator (PFI) used in TPS3707-25DGN?

The PFI pin on the TPS3707-25DGN compares an external voltage-typically derived from a resistor divider across an auxiliary supply-to an internal 1.25 V reference. When the divided voltage falls below 1.25 V, the open-drain PFO output pulls low, signaling a power-fail or low-battery condition to the host system.

What package type and thermal characteristics apply to TPS3707-25DGN?

The TPS3707-25DGN uses the MSOP-PowerPAD™ (DGN) package: 8-pin, 3.00 mm × 3.00 mm body with exposed thermal pad. Its junction-to-ambient thermal resistance is 66.1°C/W, and junction-to-board is 45.1°C/W-requiring soldering of the PowerPAD to a PCB thermal plane for rated performance.

Can TPS3707-25DGN replace MAX705–MAX708 series devices directly?

Yes, the TPS3707-25DGN is explicitly pin-for-pin compatible with the MAX705 through MAX708 series in SOIC-8 and MSOP-8 packages. However, the DGN variant's MSOP-PowerPAD™ footprint differs mechanically from standard MSOP; layout verification is required when substituting into existing MAX70x designs using MSOP-8.