Texas Instruments TPS2159IDGN

Overview

TPS2159IDGN from Texas Instruments is a dual-channel USB power-distribution switch with integrated 3.3-V/200-mA LDO, designed for bus-powered USB hubs. It features two 5-V high-side MOSFETs (340 mΩ typical R_DS(on)), independent thermal and short-circuit protection per channel, active-high enable inputs, and an open-drain overcurrent flag. It operates from 2.9 V to 5.5 V and supports hot-plug compliance in compact MSOP-8 PowerPAD™ packaging.

For engineers reviewing the TPS2159IDGN datasheet, TPS2159IDGN pinout, TPS2159IDGN application, or TPS2159IDGN equivalent, this device delivers verified current limiting (200 mA per switch), controlled rise/fall times (0.1–6 ms), UVLO (2.2–2.85 V), thermal shutdown at 120°C (per switch) and 155°C (global), and LDO dropout of 0.35 V - all critical for USB 2.0 hub power architecture validation.

Technical Context

The TPS2159IDGN integrates two independently enabled N-channel high-side power switches and a fixed 3.3-V LDO in a single MSOP-8 package. Each switch provides 150 mA continuous output with 340 mΩ typical on-resistance at 25°C and includes dedicated current-sense FETs, thermal sensing, and overcurrent flag assertion with 5.5-ms delay.

The LDO supplies 200 mA at 3.3 V with 0.35-V dropout, line regulation of 0.1%/V, and load regulation of 1%. Its output is internally decoupled and compatible with 4.7-µF output capacitors (ESR 200 mΩ–10 Ω). The device implements dual-threshold thermal protection (120°C per switch, 155°C global) and undervoltage lockout (2.2–2.85 V with 260-mV hysteresis).

Key Specifications

Pinout & Package

TPS2159IDGN is housed in an 8-pin MSOP (DGN) package with exposed thermal pad (PowerPAD™), optimized for thermal performance in space-constrained USB hub designs. The package measures 3.0 mm × 3.0 mm × 1.0 mm and supports JEDEC Level-1 reflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-switch + LDO power management applications.

Compared with TPS2149IDGN, TPS2159IDGN offers simplified logic interface via active-high enables, while TPD3S014RTER trades integrated regulation for higher-current switching and data-line protection - making TPS2159IDGN optimal for cost- and space-sensitive USB hub power architectures requiring self-contained regulation.

Availability

TPS2159IDGN is available at Aetrix Electronics and suitable for USB bus-powered hubs, industrial human-interface devices, and embedded monitor peripheral interfaces requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for TPS2159IDGN 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 USB interface and power delivery expertise.

The TPS21xx family was designed specifically for USB bus-powered hub power architecture - integrating LDO regulation, dual high-side switching, and fault reporting in minimal footprint to meet USB 2.0 specification constraints.

FAQ

What is the maximum continuous output current per switch in the TPS2159IDGN?

The TPS2159IDGN supports 150 mA continuous output current per switch (OUT1 and OUT2) under recommended operating conditions (TJ ≤ 100°C). This rating ensures reliable operation during USB enumeration and sustained peripheral loads while maintaining thermal safety margins. The device also provides 200 mA current limiting and thermal foldback to protect against overload conditions without damage.

Does the TPS2159IDGN include an integrated voltage regulator?

Yes, the TPS2159IDGN includes a fixed 3.3-V low-dropout (LDO) regulator capable of delivering 200 mA. It features a 0.35-V dropout voltage at full load, 0.1%/V line regulation, and 1% load regulation. The LDO_OUT pin supplies power to the USB hub controller and pull-up resistors, eliminating the need for an external 3.3-V regulator in compliant hub designs.

How does the overcurrent (OC) flag behave on the TPS2159IDGN?

The OC pin on the TPS2159IDGN is an open-drain output that asserts low when either OUT1 or OUT2 experiences overcurrent or overtemperature. It includes an internal transient filter to suppress false triggers from capacitive inrush. The flag remains asserted until the fault condition is removed and the device recovers - no external reset is required. This enables direct connection to MCU interrupt pins for real-time fault monitoring.

What is the thermal protection behavior of the TPS2159IDGN?

The TPS2159IDGN implements dual-threshold thermal protection: individual switches shut down at ~120°C (with ~10°C hysteresis), allowing fault isolation, while global shutdown occurs at 155°C. This prevents single-port faults from disabling the entire hub. Recovery is automatic after cooling - no latch or external reset needed - ensuring robust operation in thermally demanding enclosures or high-ambient environments.

Is the TPS2159IDGN pin-compatible with any other devices in the same family?

Yes, the TPS2159IDGN is pin-compatible with the TPS2149IDGN in the same MSOP-8 (DGN) package. The only functional difference is enable polarity: TPS2159IDGN uses active-high EN1/EN2, while TPS2149IDGN uses active-low. All other pins (VIN, GND, LDO_OUT, OUT1, OUT2, OC) share identical functions and electrical characteristics, enabling layout reuse across both variants.