Home Power management DC/DC switching regulators Step-down (buck) regulators Buck converters (integrated switch)

TPS65270

ACTIVE

2 Buck Converter with 4.5V to 16V Input Voltage, 2A/3A Output Current

Product details

Vin (min) (V) 4.5 Vin (max) (V) 16 Vout (min) (V) 0.8 Vout (max) (V) 15 Iout (max) (A) 3 Iq (typ) (mA) 0.01 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1400 Features Light Load Efficiency, Phase Interleaving, Pre-Bias Start-Up, Soft Start Adjustable Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 2 Control mode current mode Duty cycle (max) (%) 100 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 16 Vout (min) (V) 0.8 Vout (max) (V) 15 Iout (max) (A) 3 Iq (typ) (mA) 0.01 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1400 Features Light Load Efficiency, Phase Interleaving, Pre-Bias Start-Up, Soft Start Adjustable Operating temperature range (°C) -40 to 85 Rating Catalog Regulated outputs (#) 2 Control mode current mode Duty cycle (max) (%) 100 Type Converter
HTSSOP (PWP) 24 49.92 mm² 7.8 x 6.4 VQFN (RGE) 24 16 mm² 4 x 4
  • Wide Input Supply Voltage Range: 4.5 V to 18 V
  • 0.8 V, ±1% Accuracy Reference
  • Up to 2-A (Buck 1) and 3-A (Buck 2) Maximum Continuous Output Loading Current
  • Low-Power Pulse Skipping Mode to Achieve High Light Load Efficiency
  • Adjustable Switching Frequency 300 kHz to 1.4 MHz Set by External Resistor
  • Startup With a Prebiased Output Voltage
  • Dedicated Enable and Soft Start for Each Buck
  • Peak Current-Mode Control With Simple Compensation Circuit
  • Cycle-by-Cycle Overcurrent Protection
  • 180° Out-of-Phase Operation to Reduce Input Capacitance and Power Supply Induced Noise
  • Available in 24-Lead Thermally Enhanced HTSSOP (PWP) and VQFN 4-mm × 4-mm (RGE) Packages
  • Wide Input Supply Voltage Range: 4.5 V to 18 V
  • 0.8 V, ±1% Accuracy Reference
  • Up to 2-A (Buck 1) and 3-A (Buck 2) Maximum Continuous Output Loading Current
  • Low-Power Pulse Skipping Mode to Achieve High Light Load Efficiency
  • Adjustable Switching Frequency 300 kHz to 1.4 MHz Set by External Resistor
  • Startup With a Prebiased Output Voltage
  • Dedicated Enable and Soft Start for Each Buck
  • Peak Current-Mode Control With Simple Compensation Circuit
  • Cycle-by-Cycle Overcurrent Protection
  • 180° Out-of-Phase Operation to Reduce Input Capacitance and Power Supply Induced Noise
  • Available in 24-Lead Thermally Enhanced HTSSOP (PWP) and VQFN 4-mm × 4-mm (RGE) Packages

The TPS65270 is a monolithic, dual synchronous buck regulator with a wide operating input voltage that can operate in 5-V, 9-V, 12-V, or 15-V bus voltages and battery chemistries. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application.

The TPS65270 features a precision 0.8-V reference and can produce output voltages up to 15 V. Each converter features an enable pin that allows dedicated control of each channel that provides flexibility for power sequencing. Soft-start time in each channel can be adjusted by choosing different external capacitors. TPS65270 is also able to start up with a prebiased output. The converter begins switching when output voltage reaches the prebiased voltage.

Constant frequency peak current-mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle overcurrent protection and hiccup mode operation limits MOSFET power dissipation in short-circuit or overloading fault conditions. Low-side reverse current protection also prevents excessive sinking current from damaging the converter.

The switching frequency of the converters can be set from 300 KHz to 1.4 MHz with an external resistor. Two converters have 180° out-of-phase clock signals to minimize the input filter requirements and alleviate EMI and input capacitor requirements.

TPS65270 also features a light-load pulse skipping mode (PSM). The PSM mode allows a power loss reduction on the input power supplied to the system at light loading in order to achieve light-load high efficiency.

The TPS65270 is available in a 24-pin, thermally enhanced HTSSOP (PWP) package and 24-pin VQFN (RGE) package.

The TPS65270 is a monolithic, dual synchronous buck regulator with a wide operating input voltage that can operate in 5-V, 9-V, 12-V, or 15-V bus voltages and battery chemistries. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application.

The TPS65270 features a precision 0.8-V reference and can produce output voltages up to 15 V. Each converter features an enable pin that allows dedicated control of each channel that provides flexibility for power sequencing. Soft-start time in each channel can be adjusted by choosing different external capacitors. TPS65270 is also able to start up with a prebiased output. The converter begins switching when output voltage reaches the prebiased voltage.

Constant frequency peak current-mode control simplifies the compensation and provides fast transient response. Cycle-by-cycle overcurrent protection and hiccup mode operation limits MOSFET power dissipation in short-circuit or overloading fault conditions. Low-side reverse current protection also prevents excessive sinking current from damaging the converter.

The switching frequency of the converters can be set from 300 KHz to 1.4 MHz with an external resistor. Two converters have 180° out-of-phase clock signals to minimize the input filter requirements and alleviate EMI and input capacitor requirements.

TPS65270 also features a light-load pulse skipping mode (PSM). The PSM mode allows a power loss reduction on the input power supplied to the system at light loading in order to achieve light-load high efficiency.

The TPS65270 is available in a 24-pin, thermally enhanced HTSSOP (PWP) package and 24-pin VQFN (RGE) package.

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 5
Type Title Date
* Data sheet TPS65270 4.5-V to 18-V Input Voltage, 2-A or 3-A Output Current, Dual Synchronous Step-Down Regulator With Integrated MOSFET datasheet (Rev. E) PDF | HTML 31 Aug 2016
EVM User's guide TPS65270 Buck Converter Evaluation Module User's Guide (Rev. C) PDF | HTML 25 May 2021
Application note Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A) PDF | HTML 01 Apr 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note TPS65270 Loop Compensation Design Consideration 29 Mar 2012

Design & development

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

Evaluation board

TPS65270EVM — TPS65270 High Current, Synchronous Step Down Dual Buck DC/DC Converter Evaluation Module

The TPS65270EVM evaluation module is designed to provide access to the features of the TPS65270. The TPS65270 PMIC is designed to provide 2-A and 3-A continuous currents with an operational range of 4.5 V to 16 V and an externally set switching frequency ranging from 300 kHz to 1.4 MHz. When the (...)

User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS65270 TINA-TI Average Reference Design

SLVM366.TSC (462 KB) - TINA-TI Reference Design
Simulation model

TPS65270 TINA-TI Average Spice Model

SLVM367.ZIP (8 KB) - TINA-TI Spice Model
Simulation model

TPS65270 Unencrypted PSpice Average Model Package (Rev. A)

SLVM516A.ZIP (42 KB) - PSpice Model
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
HTSSOP (PWP) 24 View options
VQFN (RGE) 24 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