Texas Instruments TPS3511DR

Overview

TPS3511DR from Texas Instruments is a dedicated power-supply supervisor IC for PC ATX and industrial switching power supplies, providing overvoltage (12 V/5 V/3.3 V), undervoltage (5 V/3.3 V), fault latching, open-drain PGO/FPO outputs, and 150-ms power-good delay. It operates from 4 V to 15 V supply and supports –40°C to 125°C ambient temperature.

For engineers reviewing the TPS3511DR datasheet, TPS3511DR pinout, TPS3511DR application, or TPS3511DR equivalent, key selection considerations include its 150-ms PGI-to-PGO delay (vs. 300 ms in TPS3510), 75-ms short-circuit turnon protection, 73-µs OVP noise immunity, 2.3-ms PSON-to-FPO turnoff delay, and SOIC-8 package compatibility with legacy motherboard designs.

Technical Context

The TPS3511DR integrates independent comparators for 12 V (via VDD), 5 V (VS5), and 3.3 V (VS33) overvoltage detection with 73-µs deglitching, plus dual undervoltage thresholds (PGI1 = 1.15 V, PGI2 = 0.95 V) and separate 3.3 V/5 V UV monitoring. Its internal latch holds FPO high on fault until PSON toggles low→high.

It implements three critical timing functions: 150-ms power-good assertion delay after valid PGI/VS5/VS33 rise, 75-ms UV enable delay post-PSON low, and 38-ms PSON input debounce - all with fixed internal RC timing, no external components required.

Key Specifications

Pinout & Package

TPS3511DR uses an 8-pin SOIC (D) package with 1.27 mm pitch, 3.91 mm width, and 1.75 mm max height - compatible with JEDEC MS-012AA footprint and standard ATX motherboard layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-supply supervision applications.

Compared with TPS3510DR, TPS3511DR offers faster system boot via 150-ms PGO delay and wider temperature support, while TPS3823-33DBVR trades multi-rail capability for ultra-small size and microamp quiescent current - making each suitable for distinct architecture tiers.

Availability

TPS3511DR is available at Aetrix Electronics and suitable for ATX power supply supervision, industrial PLC rail monitoring, server PSU fault management, and embedded computing power sequencing requiring stable component supply across extended temperature ranges.

Supply support for TPS3511DR 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies.

The TPS351x family was designed specifically for PC ATX and industrial switching power supply supervision, integrating OVP, UVP, PGO timing, and fault latching into a single SOIC-8 device to replace discrete protection circuits.

FAQ

What is the power-good delay specification for the TPS3511DR?

The TPS3511DR provides a fixed 150-ms delay from valid PGI/VS5/VS33 input conditions to assertion of the open-drain PGO output. This is confirmed in the SLVS312A datasheet Section 3 (Functional Block Diagram footnote †) and Electrical Characteristics table (td1 parameter). The TPS3511DR variant is explicitly defined with this 150-ms value, distinguishing it from the 300-ms delay of the TPS3510DR.

Does the TPS3511DR support 12 V overvoltage protection?

Yes, the TPS3511DR monitors 12 V overvoltage via the VDD pin, with a specified threshold of 13.2–14.4 V (typical 13.8 V). This is documented in the "Overvoltage Protection" section and Electrical Characteristics table under "Overvoltage threshold VDD". No external resistor divider is needed, as the internal comparator references VDD directly for 12 V OVP detection.

How does the TPS3511DR handle short-circuit conditions during power-on?

The TPS3511DR implements a 75-ms delay before enabling undervoltage protection after PSON goes low, preventing false trips when the power supply turns on into a shorted output. This behavior is described in the "Short-Circuit Power Supply Turnon" section and verified in the Electrical Characteristics table under "Short-circuit protection delay" (49–114 ms range, typical 75 ms).

What is the maximum operating temperature rating for the TPS3511DR?

TPS3511DR is characterized for operation from –40°C to +125°C, as stated in the "Recommended Operating Conditions" table (TA = –40 to 125°C) and confirmed in the Package Option Addendum where TPS3511DR lists "Op temp (°C): –40 to 125". This exceeds the –40°C to 85°C rating of the TPS3510DR variant.

Can the TPS3511DR replace the TPS3510DR in an existing design?

The TPS3511DR is pin-compatible and functionally identical to the TPS3510DR except for its 150-ms PGO delay (vs. 300 ms) and extended temperature range (–40°C to 125°C vs. –40°C to 85°C). Electrical characteristics, pinout, and timing parameters (except td1) match exactly. Therefore, TPS3511DR can be used as a drop-in replacement where faster boot timing and higher temperature operation are acceptable or required.