Texas Instruments TPS2147IDGQR

Overview

TPS2147IDGQR from Texas Instruments is a dual-channel power-distribution switch with integrated 3.3-V/200-mA fixed-output LDO, configured as two independent high-side N-channel MOSFETs (340-mΩ typical R_DS(on)) and an LDO sharing VIN/SWIN1 input. It delivers 150 mA per switch output and 200 mA LDO output across 2.9–5.5 V input, with independent thermal/short-circuit protection - used in USB 2.0 bus-powered hubs and portable electronics power segmentation.

For engineers reviewing the TPS2147IDGQR datasheet, TPS2147IDGQR pinout, TPS2147IDGQR application, or TPS2147IDGQR equivalent, key selection criteria include its MSOP-10 package, active-low enable logic for both switches, 3.3-V fixed LDO with 0.35-V dropout, overcurrent flag timing (5.5 ms assertion delay), and independent fault isolation for OUT1/OUT2/LDO.

Technical Context

The TPS2147IDGQR integrates two current-limited high-side switches and a fixed 3.3-V LDO in a single die, with each switch featuring independent CMOS/TTL-compatible active-low EN inputs and open-drain OC status outputs. Its internal charge pump drives MOSFET gates without external components, enabling controlled rise/fall times (0.1–6 ms) and minimizing inrush surges.

Each switch provides 150 mA continuous output with 340-mΩ typical on-resistance at 25°C and 580-mΩ max over temperature; the LDO maintains ±3% regulation (3.20–3.40 V) at 200 mA load with 50 dB PSRR at 1 kHz. Undervoltage lockout (2.2–2.85 V threshold) and dual-threshold thermal shutdown (120°C first trip, 155°C second trip) operate independently per channel.

Key Specifications

Pinout & Package

TPS2147IDGQR is housed in a thermally enhanced 10-pin MSOP (DGQ) package with exposed thermal pad (PowerPAD™), optimized for compact USB hub and portable electronics PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS2147IDGQR, TPS2147IDGQT offers identical performance in reel format for production scalability, while TPS2157IDGQR changes enable polarity - requiring hardware or firmware adaptation but enabling direct interface with active-high GPIOs.

Availability

TPS2147IDGQR is available at Aetrix Electronics and suitable for USB peripheral design, portable audio systems, and DSP power sequencing requiring stable component supply, full traceability, and long-term industrial lifecycle support.

Supply support for TPS2147IDGQR 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 TPS214x family was engineered specifically for space-constrained USB and portable electronics applications, integrating dual power switches and an LDO to replace multi-component discrete solutions while ensuring robust fault protection and thermal resilience.

FAQ

What is the maximum continuous output current per switch in the TPS2147IDGQR?

The TPS2147IDGQR supports 150 mA continuous output current per switch (OUT1 and OUT2) under recommended operating conditions. This rating is maintained across the full −40°C to 85°C ambient temperature range and accounts for thermal derating in the MSOP-10 PowerPAD™ package. The device also features programmable current limiting up to 400 mA for short-circuit protection.

Does the TPS2147IDGQR require external components for LDO stability?

Yes, the TPS2147IDGQR requires a minimum 4.7 µF output capacitor on LDO_OUT with an ESR between 200 mΩ and 10 Ω to ensure loop stability. Solid tantalum, aluminum electrolytic, or multilayer ceramic capacitors meeting this ESR range are acceptable. No external feedback resistors are needed since the LDO is fixed at 3.3 V.

How does the overcurrent protection work on the TPS2147IDGQR switches?

The TPS2147IDGQR uses integrated sense FETs to monitor load current. When current exceeds the limit (200–400 mA), it enters constant-current mode within 5.5 ms and asserts the corresponding OC1 or OC2 open-drain flag. The device remains in current-limit until the fault clears or thermal shutdown activates at 120°C junction temperature.

Can the TPS2147IDGQR be used with a 2.5-V input supply?

No - the TPS2147IDGQR has a minimum input voltage of 2.9 V per its recommended operating conditions. At 2.5 V, the internal undervoltage lockout (UVLO) activates (threshold 2.2–2.85 V), disabling both switches and the LDO. Operation below 2.9 V risks unstable regulation and unguaranteed current limiting.

What is the purpose of the charge pump in the TPS2147IDGQR?

The internal charge pump in the TPS2147IDGQR generates gate drive voltage above VIN to fully enhance the N-channel high-side MOSFETs. This eliminates the need for external boost components, ensures consistent turn-on characteristics across the 2.9–5.5 V input range, and enables controlled rise/fall times (0.1–12 ms) to minimize inrush current.