Texas Instruments TPS3707-25DGNRG4

Overview

TPS3707-25DGNRG4 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, 20 µA typical supply current, and integrated power-fail comparator (PFI/PFO). It monitors microprocessor power rails in embedded control systems requiring reliable brownout detection and manual reset capability.

For engineers reviewing the TPS3707-25DGNRG4 datasheet, TPS3707-25DGNRG4 pinout, TPS3707-25DGNRG4 application, or TPS3707-25DGNRG4 equivalent, key selection criteria include its dual-reset output configuration, 2.25 V threshold accuracy over –40°C to 85°C, MSOP-PowerPAD™ 8-pin package, and absence of watchdog timer functionality compared to TPS3705 variants.

Technical Context

The TPS3707-25DGNRG4 implements a precision bandgap reference and comparator-based supervision architecture. It asserts active-low RESET when VDD falls below 2.25 V (VIT–) and releases it after a fixed 200 ms delay upon VDD rise above threshold; simultaneously, active-high RESET provides complementary timing for systems requiring both logic polarities.

Its dedicated PFI input accepts external voltage divider signals for secondary rail monitoring (e.g., battery or auxiliary supply), driving PFO low on undervoltage events with sub-microsecond propagation delay. No external capacitor is required for reset timing, and MR supports asynchronous manual reset assertion.

Key Specifications

Pinout & Package

TPS3707-25DGNRG4 is packaged in an 8-pin MSOP-PowerPAD™ (DGN) with exposed thermal pad, measuring 3.00 mm × 3.00 mm. The PowerPAD enhances thermal dissipation (R_θJB = 45.1°C/W) and improves reliability in sustained operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3707-25DGNRG4, the SOIC variant offers mechanical compatibility at the expense of thermal performance, while MAX706R trades precision threshold and ultra-low current for broader VDD range and legacy pinout - neither provides identical dual-reset + PFI capability.

Availability

TPS3707-25DGNRG4 is available at Aetrix Electronics and suitable for industrial programmable controls, automotive body electronics, and medical embedded systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TPS3707-25DGNRG4 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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and real-time control ICs.

The TPS370x family was designed specifically for robust microprocessor supervision in harsh environments, emphasizing precision threshold accuracy, low-power operation, and integrated fault-monitoring features like PFI/PFO.

FAQ

What is the exact reset threshold voltage for TPS3707-25DGNRG4 and how does it vary with temperature?

The TPS3707-25DGNRG4 has a nominal negative-going input threshold voltage (V_IT–) of 2.25 V, with min/max values of 2.20 V and 2.32 V over the full –40°C to +85°C operating range. This 40 mV hysteresis prevents oscillation during slow-rising or noisy supply conditions. The threshold exhibits <±0.2% variation across temperature, verified in TI's SLVS184F datasheet Figure 7-2.

Does TPS3707-25DGNRG4 include a watchdog timer function?

No, TPS3707-25DGNRG4 does not include a watchdog timer. Unlike the TPS3705-x series, the TPS3707-x family replaces watchdog inputs (WDI/WDO) with a second RESET output (active-high). The device datasheet explicitly states "TPS3707-xx devices do not have the watchdog function, but include a high-level output RESET" in Section 8.3.3.

What are the recommended decoupling practices for TPS3707-25DGNRG4?

A 0.1 µF ceramic capacitor must be placed as close as possible to the VDD and GND pins of TPS3707-25DGNRG4, per Section 11.1 of the datasheet. This minimizes high-frequency noise coupling and ensures stable internal reference operation. For PFI divider networks, resistors should also be located adjacent to the PFI pin to reduce EMI susceptibility.

Can TPS3707-25DGNRG4 monitor a 12 V supply using the PFI input?

Yes, TPS3707-25DGNRG4 can monitor a 12 V supply via the PFI pin using an external resistor divider. The PFI input threshold is fixed at 1.25 V, so a 10.73:1 ratio (e.g., 910 kΩ + 120 kΩ) scales 12 V down to 1.25 V. This technique is validated in the datasheet's Figure 9-1 and Equation 1 for MSP430 applications.

Is the MSOP-PowerPAD™ package of TPS3707-25DGNRG4 compatible with standard reflow profiles?

Yes, the TPS3707-25DGNRG4 in MSOP-PowerPAD™ (DGN) package is qualified for standard lead-free reflow per JEDEC J-STD-020. Its maximum soldering temperature is 260°C, and thermal metrics (R_θJA = 66.1°C/W) confirm suitability for automated assembly. The exposed thermal pad must be soldered to a PCB thermal plane for optimal performance.