Texas Instruments TPS2140IPWP

Overview

TPS2140IPWP from Texas Instruments is a dual-channel USB power management IC integrating a 3.3-V high-side power switch with dual-current-limiting (100 mA / 800 mA) and an adjustable 250 mA LDO regulator (0.9 V to 3.3 V output). It features independent enable control, undervoltage lockout on both channels, and power-good signaling for sequencing in DSP core/I/O supply applications.

For engineers reviewing the TPS2140IPWP datasheet, TPS2140IPWP pinout, TPS2140IPWP application, or TPS2140IPWP equivalent, this device supports precise USB peripheral power control, low-noise core voltage generation, and robust inrush current management in space-constrained HTSSOP-14 layouts.

Technical Context

The TPS2140IPWP implements a dual-threshold current-limit architecture: initial 100 mA limit during SW_OUT ramp-up ensures safe charging of large output capacitance (e.g., 66 µF), then automatically transitions to ≥800 mA limit when SW_OUT reaches ≥93% of SW_IN. This enables high-capacitance loads while complying with USB inrush requirements.

Its adjustable LDO uses an external resistor divider at ADJ to set output between 0.9 V and 3.3 V, with 0.5 V max dropout at 250 mA and ±4% total output tolerance. Both switch and LDO include thermal shutdown (125°C low-trip, 155°C high-trip), open-drain pulldown pins (SW_PLDN/LDO_PLDN), and independent CMOS/TTL-compatible enable inputs with internal pullup (SW_EN) or pulldown (LDO_EN).

Key Specifications

Pinout & Package

TPS2140IPWP is housed in a 14-pin HTSSOP (PWP) package with exposed PowerPAD™ thermal pad for enhanced heat dissipation. The package measures 5.0 mm × 6.4 mm × 1.2 mm and is RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2141IPWP and TPS2150IPWP, the TPS2140IPWP uniquely combines a 3.3-V switch with active-low enable and internal pullup-making it optimal for legacy 3.3-V USB peripheral designs requiring minimal enable logic overhead and guaranteed startup behavior.

Availability

TPS2140IPWP is available at Aetrix Electronics and suitable for USB peripheral design, DSP power sequencing, and industrial embedded systems requiring stable component supply across temperature and volume production cycles.

Supply support for TPS2140IPWP 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 over 50 years of innovation in high-reliability IC design.

The TPS2140IPWP belongs to TI's USB power distribution and sequencing product line, engineered specifically for compliant, low-risk integration into USB 1.0/2.0 high-power peripheral systems with mixed-voltage requirements.

FAQ

What is the maximum continuous output current supported by the TPS2140IPWP switch channel?

The TPS2140IPWP switch channel supports 500 mA continuous output current at junction temperatures ≤110°C. Its dual-current-limit architecture delivers 100 mA during soft-start (to limit inrush) and transitions to ≥800 mA once SW_OUT reaches ≥93% of SW_IN, providing short-circuit protection while enabling full-load operation. Derating applies above 70°C ambient per the dissipation rating table.

Can the TPS2140IPWP LDO output be set to 1.2 V, and what external components are required?

Yes, the TPS2140IPWP LDO output can be precisely set to 1.2 V using an external resistor divider connected between LDO_OUT and GND, with ADJ tied to the divider midpoint. A minimum 4.7 µF output capacitor (200 mΩ–8.5 Ω ESR) is mandatory for stability; for 1.2 V operation, a 10-pF bypass capacitor across the upper resistor is recommended per TI application guidance to suppress high-frequency oscillation.

How does the TPS2140IPWP handle undervoltage conditions on its input rails?

The TPS2140IPWP implements independent undervoltage lockout (UVLO) on both SW_IN and LDO_IN. For SW_IN, UVLO triggers at 2.3 V (falling) / 2.7 V (rising); for LDO_IN, at 2.25 V (falling) / 2.7 V (rising), each with 250 mV hysteresis. When either input drops below its falling threshold, the corresponding channel disables and its PG output goes low-ensuring fail-safe behavior during brownout events without cross-channel interference.

Is the TPS2140IPWP pin-compatible with other devices in the TPS214x/215x family?

Yes, the TPS2140IPWP shares identical HTSSOP-14 (PWP) packaging and pinout with TPS2141IPWP, TPS2150IPWP, and TPS2151IPWP. However, functional differences exist: TPS2140IPWP and TPS2141IPWP use active-low SW_EN (internal pullup), while TPS2150IPWP and TPS2151IPWP use active-high SW_EN (internal pulldown); switching voltage differs (3.3 V vs. 5 V). Pin compatibility enables layout reuse but requires enable logic verification.

What thermal management considerations apply to the TPS2140IPWP in high-current operation?

The TPS2140IPWP requires proper thermal design due to its 666.7 mW maximum power rating at 85°C ambient (HTSSOP-14, JEDEC low-k board). The exposed PowerPAD™ must be soldered to a minimum 100 mm² copper pour with ≥4 thermal vias to inner/ground planes. At 500 mA load and 3.3-V input, power dissipation exceeds 100 mW-necessitating thermal simulation or IR imaging to ensure junction temperature remains ≤110°C under worst-case airflow conditions.