Texas Instruments TPS2032P

Overview

TPS2032P from Texas Instruments is a 1.5-A rated, 8-pin PDIP-packaged high-side N-channel MOSFET power distribution switch with 33 mΩ on-resistance at 5 V input, integrated charge pump, overcurrent logic output (OC), and thermal/undervoltage lockout protection - designed for hot-plug USB peripherals, industrial I/O modules, and embedded system power rail control.

For engineers reviewing the TPS2032P datasheet, TPS2032P pinout, TPS2032P application, or TPS2032P equivalent, key selection criteria include its 1.5-A short-circuit current limit (TJ = 25°C), 2.7–5.5 V operating range, active-high enable compatible with 3-V/5-V logic, 6.1-ms typical rise time, and absence of drain-source back-gate diode - critical for bidirectional isolation in shared-bus systems.

Technical Context

The TPS2032P implements an internal charge pump to drive the N-channel MOSFET gate above the source, enabling full enhancement down to 2.7 V input while maintaining low rDS(on). Its current-limit circuit uses a sense FET-not a shunt resistor-to detect overload and force constant-current mode without adding series resistance.

Thermal shutdown activates at ~140°C junction temperature with ~20°C hysteresis; recovery is automatic after cooling. Undervoltage lockout disables the switch below ~2 V input, ensuring safe startup and hot-insertion behavior. The OC pin is open-drain and asserts low during overcurrent or overtemperature events.

Key Specifications

Pinout & Package

TPS2032P is housed in an 8-pin plastic dual-in-line (PDIP) package with 0.3-inch body width and through-hole mounting. Thermal resistance θJA = 106°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side power switch applications.

Compared with TPS2032D, the TPS2032P offers superior thermal dissipation (106 vs. 172°C/W) for high-ambient industrial use, while TPS2051BDBV sacrifices protection features for minimal size - making TPS2032P optimal for robust, field-deployable hot-swap applications requiring full fault visibility and ruggedness.

Availability

TPS2032P is available at Aetrix Electronics and suitable for USB peripheral power switching, industrial I/O module protection, and embedded system rail sequencing requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole packaging.

Supply support for TPS2032P 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-switching solutions.

The TPS203x family was engineered specifically for hot-plug and heavy-capacitive-load applications in computing, industrial automation, and communications infrastructure - emphasizing fault resilience, ease of integration, and safety certification readiness.

FAQ

What is the short-circuit current limit of the TPS2032P?

The TPS2032P has a typical short-circuit output current limit of 1.5 A at TJ = 25°C and VI(IN) = 5.5 V. This value varies with junction temperature and input voltage - dropping to ~1.1 A at TJ = 125°C and rising to ~1.8 A at lower temperatures. The TPS2032P enters constant-current mode when this threshold is exceeded, holding output current steady while reducing output voltage to protect downstream circuitry.

Does the TPS2032P require external components for basic operation?

No, the TPS2032P operates autonomously with no external components required for core functionality. A 0.1-µF ceramic bypass capacitor between IN and GND is recommended for noise suppression, and an external pull-up resistor on the OC pin is needed for fault signaling. The internal charge pump eliminates the need for bootstrap capacitors or external gate drivers - simplifying layout and reducing BOM count.

Can the TPS2032P be used with 3.3-V logic enable signals?

Yes, the TPS2032P EN pin is compatible with 3.3-V logic: VIH(min) is 0.8 × VI(IN) for VI(IN) ≥ 4.5 V and 2 V minimum for VI(IN) ≥ 2.7 V. With a 3.3-V supply, a logic-high EN signal ≥ 2 V reliably turns on the switch. The input current is ±0.5 µA, allowing direct connection to most microcontroller GPIOs without level-shifting.

How does the OC pin behave during a short-circuit event?

During a short-circuit event, the TPS2032P's OC pin transitions to a low state (VOL ≤ 0.4 V @ 10 mA) and remains asserted until the fault is removed. It responds to both overcurrent and overtemperature conditions. Because OC is open-drain, it requires an external pull-up resistor (typically 10 kΩ to VI(IN)) to generate a valid logic-high when inactive. This allows wired-OR fault signaling across multiple TPS2032P devices.

What is the maximum ambient temperature for continuous 1.5-A operation with the TPS2032P?

At TA = 85°C, the TPS2032P in PDIP package can sustain 1.5-A continuous output current only if board-level thermal design keeps junction temperature ≤125°C. Using θJA = 106°C/W, the maximum allowable power dissipation is 3.94 W. With rDS(on) ≈ 46 mΩ at TJ = 85°C, conduction loss is ~1.04 W - well within limit. Derating curves confirm 611 mW max power at TA = 85°C, supporting full-rated current in properly heatsinked industrial environments.