TPS2115APW - 1.25A, 5.5V Power Mux w/ Status | Texas Instruments
MPN: TPS2115APW ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.81 | $2.81 |
| 10 | $2.53 | $25.30 |
| 100 | $2.25 | $225.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.7 | $1,700.00 |
TPS2115APW Overview
A power mux is a category of power-management IC that arbitrates between two or more DC input sources (battery, wall adapter, USB, auxiliary rail) and routes one of them to the load. Within the broader taxonomy, power muxes sit below load switches and above simple ideal-diode OR-ing controllers, combining the low-loss benefits of MOSFET pass elements with intelligent source-selection logic. The TPS2115A family specifically targets systems requiring seamless transitions between a primary and backup supply without brown-outs on the load.
Key features of the TPS2115APW include 84 mΩ typical on-resistance per channel, low 0.5 µA standby current, programmable current limiting, inrush current control, thermal shutdown protection, and a wide 2.8 V to 5.5 V operating range on both input rails. The integrated STATUS pin reflects which source is currently active, enabling host-side telemetry in multi-rail systems.
Architecturally, the TPS2115APW uses back-to-back N-channel MOSFETs per channel driven by charge-pumped gate drivers. The body-diode reverse-blocking design prevents unintended current flow from a higher-voltage rail into a lower-voltage rail. The control logic implements break-before-make switching with user-programmable switchover thresholds and switching speed.
Typical applications include battery-backed-up portable electronics, USB/wall-adapter power switching in handheld terminals, multi-rail industrial sensor nodes, redundancy power OR-ing in 5V systems, and any application requiring glitch-free transitions between two DC sources.
When designing with the TPS2115APW, consider that the TSSOP-8 package has a thermal resistance of approximately 150 °C/W; continuous 1.25 A operation at high VIN requires adequate copper pour. The MS pin (mode select) and ILIM pin (current limit) require external component selection to balance inrush vs steady-state behavior. Cross-conduction blocking eliminates the need for external back-to-back FETs, simplifying BOM.
This page synthesizes distributor pricing, drop-in alternatives within the TSSOP-8 footprint, and design guidance not found in the manufacturer datasheet alone - giving procurement and design engineers a one-stop reference for source-selection decisions.
Drop-in alternatives for TPS2115APW — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS2114APW
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2113APW
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2115APWR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2111APWR
✅ Drop-In📋 Reference alternative (not in catalog)
MAX17620ATA+T
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2115APW Maximum Ratings & Electrical Characteristics
| Manufacturer | Texas Instruments |
| Series | TPS211xA |
| Function | Power Multiplexer / OR Controller Source Selector |
| Topology | 2:1 Power Mux with N-Channel MOSFETs |
| Operating Input Voltage (IN1, IN2) | 2.8 V to 5.5 V |
| Continuous Output Current | 1.25 A (PW package) |
| On-Resistance (rDS(on)) | 84 mΩ typical |
| On-Resistance (TPS2114A reference) | 120 mΩ typical |
| Standby Current | 0.5 µA typical |
| Switchover Modes | Manual, Automatic, Slow |
| STATUS Output | Yes (open-drain) |
| Cross-Conduction Blocking | Yes |
| Reverse Current Blocking | Yes |
| Current Limit | User-programmable via ILIM resistor |
| Thermal Shutdown | Yes |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 8-pin TSSOP (PW) |
| Package Dimensions | 0.173" (4.40 mm) body width |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life) |
| Lead-Free / RoHS | Yes (RoHS compliant) |
TPS2115APW Pin Configuration
| Pin 1 | IN1 — Primary input supply (2.8 V to 5.5 V) |
| Pin 2 | IN2 — Secondary input supply (2.8 V to 5.5 V) |
| Pin 3 | GND — Ground reference |
| Pin 4 | ILIM — Current-limit programming pin (external resistor to GND) |
| Pin 5 | MS — Mode select (Manual / Automatic / Slow switchover) |
| Pin 6 | OUT — Regulated mux output to load |
| Pin 7 | STATUS — Open-drain status flag indicating active source |
| Pin 8 | IN1 — Primary input supply (alternate bond for higher current, paired with pin 1) |
Typical Applications
TPS2115APW is suitable for 6 applications: Battery-Backed Portable Electronics, USB / Wall-Adapter Power Switching, Redundant 5V Power OR-ing in Industrial Systems, Multi-Rail Sensor Node Power Arbitration, Hot-Swap Backup for Set-Top Boxes / Home Gateways, Automotive Infotainment Power Source Switching.
Battery-Backed Portable Electronics
The TPS2115APW is ideal for handhelds that must transition seamlessly between a rechargeable battery (IN1) and a wall/USB adapter (IN2) without brown-outs on the load. Its 84 mΩ typical rDS(on) per channel and 1.25 A continuous rating comfortably support 5 V rails in PDAs, handheld scanners, and portable medical devices, while the 0.5 µA standby current keeps battery drain negligible when the wall adapter is connected. The integrated cross-conduction blocking eliminates the back-to-back FET pair that discrete OR-ing designs require, reducing BOM cost and PCB area in the compact form factors typical of portable designs.
Recommended
USB / Wall-Adapter Power Switching
The TPS2115APW arbitrates between a USB VBUS rail (IN1) and a wall-adapter jack (IN2), automatically routing whichever source is active to the downstream 5V load. According to TI's TPS2115A datasheet, the device supports seamless switchover so the load never sees a glitch when the user unplugs the adapter and the USB source takes over. Its 2.8-5.5 V operating range matches both USB 2.0/3.0 VBUS levels and standard adapter outputs, while the STATUS output lets the host MCU log which source is currently powering the system - useful for charging-state telemetry.
Recommended
Redundant 5V Power OR-ing in Industrial Systems
In industrial controllers and PLC I/O modules, the TPS2115APW provides OR-ing between a primary 5V supply and a backup rail (such as a hold-up capacitor bank or auxiliary PSU), ensuring uninterrupted operation if the primary fails. The device's reverse-current blocking prevents the backup rail from feeding back into the failed primary, while cross-conduction blocking protects both rails during switchover. The 1.25 A continuous rating covers typical 5V logic and relay-driver loads, and the -40 °C to +85 °C operating range suits the industrial temperature envelope.
Recommended
Multi-Rail Sensor Node Power Arbitration
Wireless sensor nodes powered by both an energy-harvesting source (such as a small solar cell) and a backup battery benefit from the TPS2115APW's automatic switchover between the two inputs. The device's low 0.5 µA standby current is critical for energy-constrained nodes that spend most of their time asleep, and the wide 2.8-5.5 V input range accommodates common battery and harvester output voltages. According to TI's datasheet, the integrated thermal shutdown protects the device when the harvester is exposed to high ambient temperatures.
Recommended
Hot-Swap Backup for Set-Top Boxes / Home Gateways
In set-top boxes, home gateways, and networked consumer devices, the TPS2115APW can arbitrate between the main DC adapter and a coin-cell/supercap backup rail that retains settings during a brief power outage. The device's automatic switchover reacts within microseconds (faster than most downstream LDO hold-up times), preventing reboots when the AC mains blips. Its 8-TSSOP package is small enough to fit in the dense back-panel sections of consumer gateways, and the STATUS output can drive an LED or interrupt the host SoC to log the event.
Recommended
Automotive Infotainment Power Source Switching
Although not AEC-Q100 qualified, the TPS2115APW is used in non-safety automotive subsystems (infotainment, telematics, rear-seat displays) where two power sources must be arbitrated - typically a primary 5V rail from the head unit and a backup rail from a local regulator. According to TI's TPS2115A datasheet, the device's cross-conduction blocking and reverse-current protection prevent unintended back-feeding between rails during the engine crank transient, which is the harshest power-quality event in 12V automotive systems. Its TSSOP-8 footprint is well-suited to the densely packed PCBs of modern infotainment head units.
Recommended
Recommended Products Summary
Engineering reference data for TPS2115APW — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS2114APW | TPS2113APW | TPS2115APWR | TPS2111APWR | MAX17620ATA+T |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Package | 8-TSSOP (PW) | 8-TSSOP (PW) - same | 8-TSSOP (PW) - same | 8-TSSOP (PW) - same | 8-TSSOP (PW) - same | 8-TDFN (3x3 mm) |
| rDS(on) per channel | 84 mΩ typical | 120 mΩ typical | 84 mΩ typical | 84 mΩ typical | 84 mΩ typical | 80 mΩ typical |
| Continuous Output Current | 1.25 A | 1.25 A | 1.25 A | 1.25 A | 0.4 A | 1 A |
| STATUS Output | Yes (open-drain) | Yes | No | Yes | Yes | Yes |
| Input Voltage Range | 2.8 V to 5.5 V | 2.8 V to 5.5 V | 2.8 V to 5.5 V | 2.8 V to 5.5 V | 2.8 V to 5.5 V | 2.7 V to 5.5 V |
| Standby Current | 0.5 µA typical | 0.5 µA typical | 0.5 µA typical | 0.5 µA typical | 0.5 µA typical | 1 µA typical |
| Cross-Conduction Blocking | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Includes open-drain STATUS output for source telemetry (vs TPS2113APW)
- Lower rDS(on) per channel at 84 mΩ typical (vs TPS2114APW)
- Higher 1.25 A continuous current vs lower-current family members (vs TPS2111APWR)
Design Notes
Estimated: at VIN=5 V, VOUT=5 V (pass-through mode), and 1.25 A load, the TPS2115APW dissipates P = I² × rDS(on) = (1.25)² × 0.084 = ~131 mW per channel when active. The TSSOP-8 (PW) package has θJA of approximately 150 °C/W per JEDEC EIA/JESD51 test conditions, giving a junction temperature rise of ~20 °C above ambient - well within the 125 °C maximum. For continuous operation at the upper ambient limit (85 °C), adequate copper pour on the IN1/IN2/OUT/GND traces is recommended to keep θJA low.
Route the IN1, IN2, and OUT traces with wide copper pours (at least 20 mil per ampere) to minimize voltage drop and thermal stress on the internal MOSFETs. Place the ILIM resistor close to the ILIM pin to prevent noise pickup, and connect the GND pin directly to a low-impedance ground plane. The STATUS output is open-drain and requires a pull-up resistor (typically 10 kΩ to VLOGIC) for proper logic-level signaling to the host MCU.
Do not leave the ILIM pin floating - it must be connected to GND through a resistor to set the current-limit threshold (per TI's TPS2115A datasheet). Leaving it floating can result in undefined current-limit behavior and potential over-current damage to the load. Similarly, the MS pin must be tied to one of three valid logic states (GND, IN1, or a defined logic level) per the datasheet's switchover mode table; floating MS will cause erratic source-switching behavior.
Compliance Information
RoHS and lead-free confirmed per TI product page. Not AEC-Q100 qualified; for automotive safety applications, consider TI's newer AEC-Q100-qualified power-mux family.
