TPS65266-1

ACTIVE

2.7V to 6.5V Input, 3A/2A/2A Triple Buck Converter

Product details

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 2.7 Vin (max) (V) 6 Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 2400 Features Enable, Frequency synchronization, Light Load Efficiency, Phase Interleaving, Power good Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 340 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 2.7 Vin (max) (V) 6 Switching frequency (min) (kHz) 250 Switching frequency (max) (kHz) 2400 Features Enable, Frequency synchronization, Light Load Efficiency, Phase Interleaving, Power good Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 340 Duty cycle (max) (%) 100
VQFN (RHB) 32 25 mm² 5 x 5
  • Operating Input Voltage Range 2.7 to 6 V
  • Feedback Reference Voltage 0.6 V ±1%
  • Maximum Continuous Output Current 3 A/2 A/2 A
  • Dedicated Enable and Soft Start
  • Accurate Start-Up Timing Control With Enable Pins Discharge
  • Pulse Skipping Mode (PSM) at Light Load
  • Cycle-by-Cycle Current Limiting With Hiccup Mode Overcurrent Protection
  • Adjustable Clock Frequency 250 kHz to 2.4 MHz
  • External Clock Synchronization
  • Power-Good Indicator
  • Overtemperature Protection
  • Operating Input Voltage Range 2.7 to 6 V
  • Feedback Reference Voltage 0.6 V ±1%
  • Maximum Continuous Output Current 3 A/2 A/2 A
  • Dedicated Enable and Soft Start
  • Accurate Start-Up Timing Control With Enable Pins Discharge
  • Pulse Skipping Mode (PSM) at Light Load
  • Cycle-by-Cycle Current Limiting With Hiccup Mode Overcurrent Protection
  • Adjustable Clock Frequency 250 kHz to 2.4 MHz
  • External Clock Synchronization
  • Power-Good Indicator
  • Overtemperature Protection

The TPS65266-1 incorporates 3 channels of high-efficiency synchronous buck converter for applications operating off the adaptor or battery with input voltage lower than 6 V.

The buck DC/DC converter integrates power MOSFETs for optimized power efficiency and reduces external component counts. The peak current mode control simplifies the compensation and fast transient response. High clock frequency allows smaller and low-value inductors and capacitors. External compensation supports optimized loop compensation and fast transient response. In light load condition, the buck converter operates in PSM mode for a reduction on the input power supplied to the system. Cycle-by-cycle overcurrent limiting with hiccup mode limits MOSFET power dissipation in short circuit or overloading fault conditions.

The TPS65266-1 features a power-good supervisor circuit that monitors all converter outputs. The PGOOD pin is asserted after the output voltages in each channel are in regulation and sequencing is done.

When continuous heavy overload or short circuit increases power dissipation in the buck converter, internal thermal protection circuit shuts off the device to prevent damage. Recovery from a thermal shutdown is automatic after the device has cooled sufficiently.

The TPS65266-1 incorporates 3 channels of high-efficiency synchronous buck converter for applications operating off the adaptor or battery with input voltage lower than 6 V.

The buck DC/DC converter integrates power MOSFETs for optimized power efficiency and reduces external component counts. The peak current mode control simplifies the compensation and fast transient response. High clock frequency allows smaller and low-value inductors and capacitors. External compensation supports optimized loop compensation and fast transient response. In light load condition, the buck converter operates in PSM mode for a reduction on the input power supplied to the system. Cycle-by-cycle overcurrent limiting with hiccup mode limits MOSFET power dissipation in short circuit or overloading fault conditions.

The TPS65266-1 features a power-good supervisor circuit that monitors all converter outputs. The PGOOD pin is asserted after the output voltages in each channel are in regulation and sequencing is done.

When continuous heavy overload or short circuit increases power dissipation in the buck converter, internal thermal protection circuit shuts off the device to prevent damage. Recovery from a thermal shutdown is automatic after the device has cooled sufficiently.

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Technical documentation

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Type Title Date
* Data sheet TPS65266-1 2.7 to 6-V Input Voltage, 3-A/2-A/2-A Output Current Triple Synchronous Step-Down Converter datasheet PDF | HTML 17 Nov 2015
Application note Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A) PDF | HTML 01 Apr 2019

Design & development

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Evaluation board

TPS65266EVM-686 — 2.7V to 6.5V Input, 3A/2A/2A Buck converter evaluation module

The TPS65266EVM-686 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65266. The EVM contains input and output connectors as well as control jumpers to ease evaluation of device features.

User guide: PDF
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VQFN (RHB) 32 Ultra Librarian

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