Texas Instruments TPS3513D

Overview

TPS3513D from Texas Instruments is a PC power supply supervisor IC designed for ATX and SFX switching power supplies. It provides overvoltage (OVP), undervoltage (UVP), and overcurrent (OCP) protection for 3.3 V, 5 V, and 12 V rails; features open-drain PGO and FPO outputs; and operates across –40°C to 85°C with 4.5 V to 15 V supply range.

For engineers reviewing the TPS3513D datasheet, TPS3513D pinout, TPS3513D application, or TPS3513D equivalent, this page delivers verified functional identity, SOIC-14 package mapping, confirmed 300-ms PGO delay, 75-ms OCP enable timing, and validated alternative parts for PC PSU supervisory design.

Technical Context

The TPS3513D integrates three independent OVP/UVP comparators per rail (VS12/VS5/VS33), a programmable OCP reference current source (12.5–62.5 µA via RI resistor), and dual open-drain outputs: PGO (power-good) with 300-ms delay and FPO (fault-protection) with latched high-state fault indication. Its PSON input enables remote on/off control with 38-ms debounce and 2.3-ms turnoff delay to FPO.

UVLO thresholds are fixed at 4.45 V (on) / 3.65 V (off) on VDD; OVP thresholds are 13.2–14.4 V (12 V), 5.7–6.5 V (5 V), and 3.7–4.1 V (3.3 V); UVP thresholds are 8.5–9.5 V (12 V), 3.3–3.7 V (5 V), and 2.2–2.4 V (3.3 V). All fault conditions trigger immediate PGO low and latched FPO high until PSON toggles.

Key Specifications

Pinout & Package

TPS3513D is housed in a 14-pin SOIC (D) package, 3.9 mm width, 1.75 mm max height, RoHS-compliant with NIPDAU lead finish and JEDEC MS-012 AB outline. Pin 1 marked with notch or dot; pinout matches TI D0014A drawing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PC power supply supervisory applications.

Compared with TPS3513D, TPS3513DR offers identical performance in optimized packaging for SMT lines, while TPS3513N trades thermal efficiency for manual assembly flexibility-neither is pin-compatible with non-TI supervisors due to proprietary OCP programming architecture.

Availability

TPS3513D is available at Aetrix Electronics and suitable for desktop PC power supplies, server ATX PSUs, industrial IPC power modules, and SFX form factor PSUs requiring stable component supply and long-term lifecycle support.

Supply support for TPS3513D 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 ICs, with decades of expertise in PC power architecture.

The TPS3513 family was developed specifically for ATX/SFX switching power supplies to consolidate rail monitoring, fault protection, and power-good signaling into a single SOIC-14 device.

FAQ

What is the exact function of the RI pin on the TPS3513D?

The RI pin on the TPS3513D sets the reference current (I_ref) for all three overcurrent protection channels. A resistor between RI and GND establishes I_ref in the range 12.5–62.5 µA, which directly scales the OCP trip thresholds for IS12, IS5, and IS33 inputs. This allows precise, rail-specific current limiting using a single external component.

Does the TPS3513D support both 3.3 V and 5 V undervoltage detect functions?

Yes, the TPS3513D supports undervoltage detect (not lockout) for both 3.3 V and 5 V rails via VS33 and VS5 pins, with thresholds of 2.2–2.4 V and 3.3–3.7 V respectively. These inputs contribute to PGO assertion logic but do not disable outputs-only the 12 V rail has full undervoltage lockout (UVP) that forces FPO high and PGO low.

How does the TPS3513D handle overvoltage events on the 12 V rail?

When the VS12 input exceeds 13.2–14.4 V for more than 73 µs, the TPS3513D asserts FPO high (latched) and pulls PGO low immediately. The fault remains latched until PSON is toggled low-to-high or VDD is cycled. This behavior isolates the 12 V rail and signals critical overvoltage to the motherboard without automatic recovery.

What is the purpose of the PGI input on the TPS3513D?

The PGI (power-good input) on the TPS3513D receives the motherboard's system-level power-good signal. When PGI rises above 1.2 V, it confirms upstream power stability and enables the TPS3513D to begin monitoring VS33 and VS5 for PGO assertion. It acts as a hierarchical enable signal ensuring coordinated power sequencing across the entire system.

Can the TPS3513D be used in place of the TPS3513DR in a production design?

Yes, the TPS3513D and TPS3513DR share identical die, electrical characteristics, and SOIC-14 pinout. The only difference is packaging: TPS3513D is supplied in tube format (obsolete status), while TPS3513DR is active in tape-and-reel. For new designs, TPS3513DR is recommended; TPS3513D remains viable for legacy board repair or small-batch builds where tube packaging is acceptable.