Home Power management DC/DC switching regulators Step-down (buck) regulators Buck controllers (external switch)

TPS5120

ACTIVE

4.5-V to 28-V, dual-ouptut, two-phase synchronous buck controller

A newer version of this product is available

open-in-new Compare alternates
Similar functionality to the compared device
TPS51397A ACTIVE 4.5-V to 24-V input, 10-A, synchronous step-down regulator Offers a lower IQ and is soft start adjustable with an extended positive operating temperature range in a smaller package.

Product details

Vin (min) (V) 4.5 Vin (max) (V) 28 Vout (min) (V) 0.9 Vout (max) (V) 26 Iout (max) (A) 20 Iq (typ) (mA) 1.1 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 500 Features Enable, Light Load Efficiency, Phase Interleaving, Power good, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 2 Number of phases 2 Rating Catalog Control mode Voltage mode Type Controller
Vin (min) (V) 4.5 Vin (max) (V) 28 Vout (min) (V) 0.9 Vout (max) (V) 26 Iout (max) (A) 20 Iq (typ) (mA) 1.1 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 500 Features Enable, Light Load Efficiency, Phase Interleaving, Power good, Synchronous Rectification Operating temperature range (°C) -40 to 85 Regulated outputs (#) 2 Number of phases 2 Rating Catalog Control mode Voltage mode Type Controller
TSSOP (DBT) 30 49.92 mm² 7.8 x 6.4
  • Independent Dual-Outputs Operate 180° Out of Phase
  • Wide Input Voltage Range: 4.5-V – 28-V
  • Adjustable Output Voltage Down to 0.9 V
  • Pin-Selectable PWM/SKIP Mode for High Efficiency Under Light Loads
  • Synchronous Buck Operation Allows up to 95% Efficiency
  • Separate Standby Control and Overcurrent Protection for Each Channel
  • Programmable Short-Circuit Protection
  • Low Supply (1 mA) and Shutdown (1 nA) Current
  • Power Good Output
  • High-Speed Error Amplifiers
  • Sequencing Easily Achieved by Selecting Softstart Capacitor Values.
  • 5-V Linear Regulator Power Internal IC Circuitry
  • 30-Pin TSSOP Packaging

  • Independent Dual-Outputs Operate 180° Out of Phase
  • Wide Input Voltage Range: 4.5-V – 28-V
  • Adjustable Output Voltage Down to 0.9 V
  • Pin-Selectable PWM/SKIP Mode for High Efficiency Under Light Loads
  • Synchronous Buck Operation Allows up to 95% Efficiency
  • Separate Standby Control and Overcurrent Protection for Each Channel
  • Programmable Short-Circuit Protection
  • Low Supply (1 mA) and Shutdown (1 nA) Current
  • Power Good Output
  • High-Speed Error Amplifiers
  • Sequencing Easily Achieved by Selecting Softstart Capacitor Values.
  • 5-V Linear Regulator Power Internal IC Circuitry
  • 30-Pin TSSOP Packaging

The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP pin allows the operating mode to switch from PWM mode to skip mode under light load conditions. The skip mode enables a lower operating frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load conditions. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel MOSFETs. The resistorless current protection and fixed high-side driver voltage simplify the power supply design and reduce the external parts count. Each channel is independent, offering a separate controller, overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing different softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability.

The TPS5120 is a dual channel, high-efficiency synchronous buck controller where the outputs run 180 degrees out of phase, which lowers the input current ripple, thereby reducing the input capacitance cost. The PWM/SKIP pin allows the operating mode to switch from PWM mode to skip mode under light load conditions. The skip mode enables a lower operating frequency and shortens the pulse width to the low-side MOSFET, increasing the efficiency under light load conditions. These two modes, along with synchronous-rectifier drivers, dead time, and very low quiescent current, allow power to be conserved and the battery life to be extended under all load conditions. The 1.5 A (typical) high-side and low-side MOSFET drivers on-chip are designed to drive less expensive N-channel MOSFETs. The resistorless current protection and fixed high-side driver voltage simplify the power supply design and reduce the external parts count. Each channel is independent, offering a separate controller, overcurrent protection, and standby control. Sequencing is flexible and can be tailored by choosing different softstart capacitor values. Other features, such as undervoltage lockout, power good, overvoltage, undervoltage, and programmable short-circuit protection promote system reliability.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Data sheet Dual Output, Two-Phase Synchronous Buck DC/DC Controller. datasheet (Rev. E) 28 Mar 2003

Design & development

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

Simulation tool

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 (...)
Package Pins Download
TSSOP (DBT) 30 View options

Ordering & quality

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

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos