Texas Instruments UCC2915DP

Overview

UCC2915DP from Texas Instruments is a programmable hot-swap power manager IC integrating a 0.15-Ω internal N-channel MOSFET, digital-programmable current limit (0–3 A in 0.25-A steps), 7–15-V operation, 100-µA sleep-mode supply current, and thermal shutdown protection. It serves as a smart power switch for board-level hot-plug insertion in telecom line cards and server backplanes.

For engineers reviewing the UCC2915DP datasheet, UCC2915DP pinout, UCC2915DP application, or UCC2915DP equivalent, key selection criteria include programmable fault timing via external CT capacitor, IMAX-controlled maximum output current (1 A above trip or fixed 4 A), fixed 2% duty cycle under sustained fault, open-drain FAULT indicator, and SOIC-16 (DP) package with dedicated ground/heat-sink pins.

Technical Context

The UCC2915DP implements a digitally programmable overcurrent protection architecture using a 4-bit DAC (B0–B3) to set trip threshold, combined with an adaptive current-source mode triggered by IMAX pin logic level. Fault detection initiates CT capacitor charging; once CT reaches 1.5 V, the device enters shutdown for 50× the programmed fault time.

Under normal operation, the integrated MOSFET delivers low R_DS(on) (0.15 Ω typ.) with voltage drop scaling linearly with load current (e.g., 0.45 V at 3 A). Thermal shutdown activates at 165°C with 10°C hysteresis, and undervoltage lockout ensures operation only within 7–15 V VIN range.

Key Specifications

Pinout & Package

UCC2915DP uses the SOIC-16 (DP) package with exposed thermal pad grounding via pins 4, 12, and 13 - these must connect to large PCB copper areas for effective heat dissipation. Pin 5 serves as primary electrical ground reference.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hot-swap power management applications.

Compared with UCC3915DP and LTC4211CS8#PBF, the UCC2915DP uniquely combines industrial temperature range (–40°C to 85°C), fully programmable 0–3 A fault threshold, integrated 0.15-Ω MOSFET, and adaptive 4-A current-source mode - making it optimal for ruggedized hot-swap systems requiring field-replaceable modules with deterministic fault recovery.

Availability

UCC2915DP is available at Aetrix Electronics and suitable for telecom line card insertion, server backplane hot-swap, and industrial PLC I/O module protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for UCC2915DP 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 expertise in high-reliability power IC design.

The UCC2915DP belongs to TI's hot-swap controller product line, engineered specifically for robust, programmable power sequencing and fault protection in carrier-grade communications and industrial infrastructure equipment.

FAQ

What is the operating temperature range specified for the UCC2915DP?

The UCC2915DP is rated for operation from –40°C to +85°C ambient temperature, as confirmed in its electrical characteristics table and packaging addendum. This extended industrial temperature range distinguishes it from the UCC3915DP (0°C to 70°C), making the UCC2915DP suitable for deployment in outdoor telecom cabinets, factory-floor PLCs, and other harsh-environment applications where thermal margins are critical. All performance parameters in the datasheet apply across this full range.

How does the IMAX pin affect the maximum output current behavior of the UCC2915DP?

The IMAX pin on the UCC2915DP selects between two distinct maximum output current modes: when pulled low (≤0.4 V), the device limits sourcing current to exactly 1 A above the programmed fault threshold; when pulled high (≥2.4 V), it delivers a fixed 4-A constant-current output regardless of trip level. This dual-mode capability allows designers to optimize for either precise fault-margin control or rapid bulk capacitor charging - both implemented without external components or firmware intervention.

Can the UCC2915DP be used without an external timing capacitor (CT)?

No - the UCC2915DP requires an external CT capacitor connected between the CT pin and ground to define fault timing. The CT capacitor sets both the fault-on duration (T_FAULT = 16.1 kΩ × C_T) and the subsequent recovery-off time (T_SD = 833 kΩ × C_T). Omitting CT disables fault timing functionality, causing the device to remain latched off after first fault detection. Minimum recommended CT value is 100 pF; typical values range from 10 nF to 100 nF depending on required fault window.

What is the purpose of the multiple GND and EGND pins on the UCC2915DP SOIC-16 package?

The UCC2915DP's SOIC-16 (DP) package features four dedicated ground terminals: pin 5 (primary signal ground), and pins 4, 12, 13 (low-impedance thermal/ground paths). Pins 4, 12, and 13 must be connected to large PCB copper pour areas to conduct heat away from the integrated 0.15-Ω MOSFET. This multi-pin ground strategy separates high-current return paths from sensitive analog references, reducing ground bounce and improving current-sense accuracy during fast transient events like hot-swap insertion.

Does the UCC2915DP support reverse-voltage protection?

Yes - the UCC2915DP includes an internal reverse-voltage comparator that monitors VOUT relative to VIN. If VOUT exceeds VIN by more than 30 mV (e.g., due to backfeed from downstream circuitry), the device immediately disables the internal MOSFET to prevent reverse current flow. This feature protects upstream power sources and avoids potential latch-up in cascaded power domains, and operates independently of the current-limit or thermal shutdown functions.