Product details

Number of input channels 2 IN1, IN2 input voltage (Min) (V) 2.8 IN1, IN2 input voltage (Max) (V) 22 IN1 rDS(on) (Typ) (mOhm) 62 IN2 rDS(on) (Typ) (mOhms) 62 IN1 output current (Max) (A) 3 IN2 output current (Max) (A) 3 Rating Catalog Operating temperature range (C) -40 to 125
Number of input channels 2 IN1, IN2 input voltage (Min) (V) 2.8 IN1, IN2 input voltage (Max) (V) 22 IN1 rDS(on) (Typ) (mOhm) 62 IN2 rDS(on) (Typ) (mOhms) 62 IN1 output current (Max) (A) 3 IN2 output current (Max) (A) 3 Rating Catalog Operating temperature range (C) -40 to 125
DSBGA (YFP) 20 4 mm² 1.958 x 1.558
  • 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)
  • 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)

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.

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

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Type Title Date
* Data sheet TPS212x 2.8-V to 22-V Priority Power MUX with Seamless Switchover datasheet (Rev. F) 28 Aug 2020
Application note Basics of Power MUX (Rev. A) 20 Oct 2020
E-book 11 Ways to Protect Your Power Path white paper 03 Jul 2019
User guide TPS212x Evaluation Module User's Guide (Rev. A) 15 Jan 2019

Design & development

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Evaluation board

TPS2120EVM-042 — TPS2120 evaluation module for priority power multiplexer applications

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 (...)

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TPS2120 Unencrypted PSpice Transient Model Package (Rev. B)

SLVMCO9B.ZIP (134 KB) - PSpice Model
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PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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