Texas Instruments TPS2236DAPR

Overview

TPS2236DAPR from Texas Instruments is a dual-channel ExpressCard™ power interface switch IC designed to manage 3.3 V, 1.5 V, and AUX power rails for dual-slot ExpressCard|34/|54 host systems. It integrates current-limiting, thermal shutdown, undervoltage lockout (UVLO), and PERST/RCLKEN timing control. Key confirmed specs: 3.3VOUT continuous current up to 1.3 A per channel, 1.5VOUT up to 650 mA per channel, AUXOUT up to 275 mA per channel, 32-pin PowerPAD™ HTSSOP package, and –40°C to 85°C operating ambient temperature.

For engineers reviewing the TPS2236DAPR datasheet, TPS2236DAPR pinout, TPS2236DAPR application, or TPS2236DAPR equivalent, this page delivers verified electrical parameters, dual-rail timing behavior, ExpressCard-compliant power sequencing logic, and real-world design implications for notebook/desktop ExpressCard host designs requiring WAKE support and PCI Express/USB card detection.

Technical Context

The TPS2236DAPR implements two independent power-switch channels-each with dedicated 3.3VIN→3.3VOUT, 1.5VIN→1.5VOUT, and AUXIN→AUXOUT paths-enabling simultaneous power delivery to two ExpressCard slots. Each channel includes integrated current-sense circuitry, thermal monitoring, and UVLO thresholds (3.3VIN: 2.6–2.9 V; 1.5VIN: 1.0–1.25 V; AUXIN: 2.6–2.9 V).

Its control architecture uses CPPE/CPUSB inputs to detect card presence, RCLKEN as bidirectional reference clock enable with internal pullup to AUXIN, and PERST outputs with programmable assertion/de-assertion delays (500 ns min pulse width; 4–20 ms de-assertion delay). All logic inputs are TTL-compatible and internally pulled up to AUXIN.

Key Specifications

Pinout & Package

TPS2236DAPR is housed in a 32-pin PowerPAD™ HTSSOP package with exposed thermal pad (DAP suffix). The PowerPAD must be soldered to PCB copper for optimal thermal performance (θ_JA = 10.46 mW/°C derating above 25°C; max P_D = 993.4 mW at T_A = 25°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ExpressCard power management applications.

Compared with TPS2231PWP, TPS2236DAPR doubles slot capacity without increasing per-rail current capability, while TPS2236DAP offers identical performance in alternate packaging - enabling scalable design reuse across prototype, pilot, and mass-production phases.

Availability

TPS2236DAPR is available at Aetrix Electronics and suitable for notebook computers, desktop computers, and industrial embedded hosts requiring stable component supply for ExpressCard dual-slot power management.

Supply support for TPS2236DAPR 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 connectivity technologies, with decades of expertise in power management ICs for computing and communications infrastructure.

The TPS223x family was engineered specifically to meet ExpressCard™ compliance requirements - delivering integrated, dual-rail power switching with precise timing control for PCI Express and USB-based hot-pluggable expansion interfaces.

FAQ

What is the primary function of the TPS2236DAPR in an ExpressCard host system?

The TPS2236DAPR serves as a dual-channel ExpressCard™ power interface switch that independently manages 3.3 V, 1.5 V, and AUX power rails for two ExpressCard slots. It provides current limiting, thermal protection, UVLO, and ExpressCard-compliant PERST/RCLKEN timing - ensuring safe, standards-compliant hot-plug operation for both PCI Express and USB-based cards. Its integrated logic eliminates need for external sequencing controllers.

Does the TPS2236DAPR support both ExpressCard|34 and ExpressCard|54 form factors?

Yes, the TPS2236DAPR supports both ExpressCard|34 and ExpressCard|54 form factors because it meets the full ExpressCard™ standard - including compliance with ExpressCard Compliance Checklists and Implementation Guidelines. Its dual-channel architecture allows simultaneous support of mixed-form-factor configurations (e.g., one |34 and one |54 slot) in the same host system, provided mechanical and connector routing constraints are met.

How does the TPS2236DAPR handle card removal and hot-swap safety?

The TPS2236DAPR ensures hot-swap safety via integrated discharge FETs on all output rails (3.3VOUT1/2, 1.5VOUT1/2, AUXOUT1/2). When CPPE/CPUSB signals go high (card removed) or SHDN is asserted, the device turns off power switches and activates discharge FETs - pulling each output to GND within 2–30 ms depending on capacitance. This prevents floating voltages and backfeeding, satisfying ExpressCard hot-swap requirements and protecting both host and card.

What are the key differences between TPS2236DAPR and TPS2231PWP?

The TPS2236DAPR is a dual-channel device in a 32-pin PowerPAD HTSSOP package supporting two ExpressCard slots, while the TPS2231PWP is single-channel in a 24-pin package for one slot. Both share identical per-rail specifications (1.3 A/650 mA/275 mA), UVLO thresholds, and timing behavior. The TPS2236DAPR adds duplicate control pins (CPPE2/CPUSB2/PERST2/RCLKEN2/OC2/SHDN2/STBY2) and second rail outputs - enabling true dual-slot independence without external logic duplication.

Can the TPS2236DAPR be used in systems without PCI Express support?

Yes, the TPS2236DAPR remains fully functional in USB-only ExpressCard systems. CPPE inputs may be left unconnected or tied high (via pullup to AUXIN), while CPUSB inputs detect USB card presence. All power rails, PERST generation, RCLKEN timing, and protection features operate identically - the device does not require PCI Express signaling to deliver regulated 3.3 V, 1.5 V, and AUX power with ExpressCard-compliant sequencing and safety.