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Product details

Parameters

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 Iq (Typ) (uA) 10 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 1.4 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 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HTSSOP (PWP) 24 34 mm² 7.7 x 4.4 VQFN (RGE) 24 16 mm² 4 x 4 open-in-new Find other Buck converters (integrated switch)

Features

  • 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
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Description

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.

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Technical documentation

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Type Title Date
* Datasheet 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) Aug. 31, 2016
Application notes Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A) Apr. 01, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles How to squeeze out every ounce of battery juice Dec. 05, 2015
Application notes TPS65270 Loop Compensation Design Consideration Mar. 29, 2012
User guides TPS65270 High Current Synchronous Step Down Dual Buck DC/DC Converter EVM (Rev. B) Dec. 07, 2011

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
49
Description

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 (...)

Features
  • Wide Input Supply Voltage Range(4.5 V - 16 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 - 1.4 MHz Set by External Resistor
  • Dedicated (...)

Design tools & simulation

SIMULATION MODELS Download
SLVM366.TSC (462 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLVM367.ZIP (8 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLVM516A.ZIP (42 KB) - PSpice Model
SIMULATION TOOLS 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
  • (...)

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 24 View options
VQFN (RGE) 24 View options

Ordering & quality

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