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Product details

Parameters

IN1, IN2 input voltage (Min) (V) 2.7 IN1, IN2 input voltage (Max) (V) 20 IN1 rDS(on) (Typ) (mOhm) 56 IN2 rDS(on) (Typ) (mOhms) 56 IN1 output current (Max) (A) 4 IN2 output current (Max) (A) 4 Number of Inputs 2 Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Power muxes

Package | Pins | Size

VQFN-HR (RUX) 12 5 mm² 2.5 x 2 open-in-new Find other Power muxes

Features

  • Wide operating range: 2.8 V to 22 V
    • Absolute maximum input voltage of 24 V
  • Low RON resistance:
    • TPS2120: 62 mΩ (typical)
    • TPS2121: 56 mΩ (typical)
  • Adjustable overvoltage supervisor (OVx):
    • Accuracy < ±5%
  • Adjustable priority supervisor (PR1):
    • Accuracy < ±5%
  • TPS2121 Supports external voltage reference (CP2) with an accuracy of <1%
  • Output current limit (ILM):
    • TPS2120: 1 A – 3 A
    • TPS2121: 1 A – 4.5 A
  • Channel status indication (ST)
  • Adjustable input settling time (SS)
  • Adjustable output soft start time (SS)
  • TPS2121 Fast output switchover (tSW): 5 µs (typical)
  • Low Iq from enabled input: 200 µA (typical)
  • Low Iq from disabled input: 10 µA (Typical)
  • Manual input source selection (OVx)
  • Over temperature protection (OTP)

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Description

The TPS212x devices are Dual-Input, Single-Output (DISO) Power Multiplexer (MUX) that are well suited for a variety of systems having multiple power sources.  The devices will Automatically Detect, Select, and Seamlessly Transition between available inputs.

 Priority can be automatically given to the highest input voltage or manually assigned to a lower voltage input to support both ORing and Source Selection operations. A priority voltage supervisor is used to select an input source.

 An Ideal Diode operation is used to seamlessly transition between input sources.  During switchover, the voltage drop is controlled to block reverse current before it happens and provide uninterrupted power to the load with minimal hold-up capacitance.

Current limiting is used during startup and switchover to protect against overcurrent events, and also protects the device during normal operation.  The output current limit can be adjusted with a single external resistor.  

 The TPS212x devices are available in WCSP and small VQFN-HR package options characterized for operation for a temperature range of –40°C to 125°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet TPS212x 2.8-V to 22-V Priority Power MUX with Seamless Switchover datasheet (Rev. F) Aug. 28, 2020
Application note Basics of Power MUX (Rev. A) Oct. 20, 2020
E-book 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
User guide TPS212x Evaluation Module User's Guide (Rev. A) Jan. 15, 2019
Technical articles How can a load switch extend your device’s battery life? Mar. 20, 2018
Technical articles How and why you should use load switches for power sequencing Feb. 06, 2018
Technical articles How to use load switches and eFuses in your set-top box design Nov. 23, 2017
Technical articles Don’t leave it floating! Power off your outputs with quick output discharge Dec. 09, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
49
Description

The TPS212x EVM is an evaluation module for TI's TPS212x family of two-input, one-output power multiplexers. This device automatically detects, selects, and seamlessly transitions between two power supplies, each operating from 2.7 V to 22 V. The TPS2121 device, the VSON hot-rod package, can deliver (...)

Features
  • Adjustable Overvoltage Protection
  • Adjustable Priority Voltage Input
  • Adjustable Soft Start/Input Settling Time
  • Seamless Switchover between Input Sources

Design tools & simulation

SIMULATION MODEL Download
SLVMCO8A.ZIP (133 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
EMC-compliant 10/100-Mbps Ethernet PHY reference design with IEEE802.3at Type-1 (≤ 12.95 W) PoE-PD
TIDA-010046 — This reference design provides a cost-optimized solution for 10 to 100 Mbps using the low-power Ethernet physical layer (PHY) DP83825 supporting 150-m reach over CAT5e cable which is beyond the standard Ethernet distance limitation of 100 m (328 feet). This design also demonstrates power (...)
document-generic Schematic
REFERENCE DESIGNS Download
Protected DC-bus input power and control power supply reference design for low-voltage servo drives
TIDA-010070 — This reference design uses an ORing controller, the LM5050-1 to provide protection against reverse polarity and reverse current. In conjunction, the LM5069 hot swap controller is used for overcurrent, over voltage, under voltage protection, and inrush current limitation. The design also features (...)
document-generic Schematic
REFERENCE DESIGNS Download
Flat-Clamp TVS based Reference Design for Protection Against Transient for Grid Applications
TIDA-010008 — This reference design features multiple approaches for  protecting AC or DC analog input, DC analog output, AC or DC binary input, digital output with a high side or low side driver, LCD bias supply, USB interfaces (power and data) and onboard power supplies with 24, 12 or 5V input used in (...)
document-generic Schematic
REFERENCE DESIGNS Download
IEEE802.3at Type-1 PoE and 12V adapter input to point of load reference design for IP network camera
TIDA-010034 — Power over Ethernet (PoE) enables power to be delivered over the same ethernet cable as data with no danger of cross-talk, interference, or corruption of the data streams. This reference design showcases end-to-end power tree for an IP network camera powered using PoE or 12-V adapter based on the (...)
document-generic Schematic
REFERENCE DESIGNS Download
Seamless switchover for backup power reference design
TIDA-01638 The TIDA-01638 referencedesign showcases Power MUXing with redundant power. If one power source fails, the system needs to switchover to a backup power source and provide an uninterrupted source of power to downstream loads. Therefore, power redundancy ensures that if one power supply were to fail (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
VQFN-HR (RUX) 12 View options

Ordering & quality

Information included:
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  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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