TPS62733

ACTIVE

Step Down Converter with Bypass Mode for Ultra Low Power Wireless Applications

Product details

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 0.1 Vin (min) (V) 1.9 Vin (max) (V) 3.9 Switching frequency (min) (kHz) 3000 Switching frequency (max) (kHz) 3000 Features Enable, Light load efficiency, Synchronous Rectification Control mode Constant on-time (COT), DCS-Control Vout (min) (V) 2.3 Vout (max) (V) 2.3 Iq (typ) (µA) 25 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 0.1 Vin (min) (V) 1.9 Vin (max) (V) 3.9 Switching frequency (min) (kHz) 3000 Switching frequency (max) (kHz) 3000 Features Enable, Light load efficiency, Synchronous Rectification Control mode Constant on-time (COT), DCS-Control Vout (min) (V) 2.3 Vout (max) (V) 2.3 Iq (typ) (µA) 25 Duty cycle (max) (%) 100
USON (DRY) 6 1.45 mm² 1.45 x 1
  • Input Voltage Range VIN From 1.9 V to 3.9 V
  • Typ. 30-nA Ultra Low-Power Bypass Mode
  • Typ. 25-µA DC-DC Quiescent Current
  • Internal Feedback Divider Disconnect
  • Typical 2.1-Ω: Bypass Switch Between VIN and VOUT
  • Automatic Transition from DC-DC to Bypass Mode
  • Up to 3-MHz Switch Frequency
  • Up to 95% DC-DC Efficiency
  • Open-Drain Status Output STAT
  • Output Peak Current up to 100 mA
  • Fixed Output Voltages 1.9 V, 2.05 V, 2.1 V, 2.3 V
  • Small External Output Filter Components 2.2 µH and 2.2 µF
  • Optimized For Low Output Ripple Voltage
  • Small 1 × 1.5 × 0.6-mm3 USON Package
  • 12-mm2 Minimum Solution Size
  • Input Voltage Range VIN From 1.9 V to 3.9 V
  • Typ. 30-nA Ultra Low-Power Bypass Mode
  • Typ. 25-µA DC-DC Quiescent Current
  • Internal Feedback Divider Disconnect
  • Typical 2.1-Ω: Bypass Switch Between VIN and VOUT
  • Automatic Transition from DC-DC to Bypass Mode
  • Up to 3-MHz Switch Frequency
  • Up to 95% DC-DC Efficiency
  • Open-Drain Status Output STAT
  • Output Peak Current up to 100 mA
  • Fixed Output Voltages 1.9 V, 2.05 V, 2.1 V, 2.3 V
  • Small External Output Filter Components 2.2 µH and 2.2 µF
  • Optimized For Low Output Ripple Voltage
  • Small 1 × 1.5 × 0.6-mm3 USON Package
  • 12-mm2 Minimum Solution Size

The TPS62730 is a high frequency synchronous step-down DC-DC converter optimized for ultra low-power wireless applications. The device is optimized to supply TI’s Low-Power Wireless sub 1-GHz and 2.4-GHz RF transceivers and System-On-Chip (SoC) solutions. The TPS62730 reduces the current consumption drawn from the battery during TX and RX mode by a high efficient step-down voltage conversion. The device provides an output current of up to 100 mA and allows the use of tiny and low-cost chip inductors and capacitors. With an input voltage range of 1.9 V to 3.9 V, the device supports Li-primary battery chemistries such as Li-SOCl2, Li-SO2, Li-MnO2, and also two cell alkaline batteries.

The TPS62730 features an Ultra Low-Power bypass mode with typical 30-nA current consumption to support sleep and low power modes of TI’s CC2540 Bluetooth Low Energy and CC430 SoC solutions. In this bypass mode, the output capacitor of the DC-DC converter is connected through an integrated typical 2.1-Ω bypass switch to the battery.

In DC-DC operation mode the device provides a fixed output voltage to the system. With a switch frequency up to 3 MHz, the TPS62730 features low output ripple voltage and low noise even with a small 2.2-µF output capacitor. The automatic transition into bypass mode during DC-DC operation prevents an increase of output ripple voltage and noise once the DC-DC converter operates close to 100% duty cycle. The device automatically enters bypass mode once the battery voltage falls below the transition threshold VIT BYP . The TPS62730 is available in a 1 × 1.5-mm2 6-pin USON package.

The TPS62730 is a high frequency synchronous step-down DC-DC converter optimized for ultra low-power wireless applications. The device is optimized to supply TI’s Low-Power Wireless sub 1-GHz and 2.4-GHz RF transceivers and System-On-Chip (SoC) solutions. The TPS62730 reduces the current consumption drawn from the battery during TX and RX mode by a high efficient step-down voltage conversion. The device provides an output current of up to 100 mA and allows the use of tiny and low-cost chip inductors and capacitors. With an input voltage range of 1.9 V to 3.9 V, the device supports Li-primary battery chemistries such as Li-SOCl2, Li-SO2, Li-MnO2, and also two cell alkaline batteries.

The TPS62730 features an Ultra Low-Power bypass mode with typical 30-nA current consumption to support sleep and low power modes of TI’s CC2540 Bluetooth Low Energy and CC430 SoC solutions. In this bypass mode, the output capacitor of the DC-DC converter is connected through an integrated typical 2.1-Ω bypass switch to the battery.

In DC-DC operation mode the device provides a fixed output voltage to the system. With a switch frequency up to 3 MHz, the TPS62730 features low output ripple voltage and low noise even with a small 2.2-µF output capacitor. The automatic transition into bypass mode during DC-DC operation prevents an increase of output ripple voltage and noise once the DC-DC converter operates close to 100% duty cycle. The device automatically enters bypass mode once the battery voltage falls below the transition threshold VIT BYP . The TPS62730 is available in a 1 × 1.5-mm2 6-pin USON package.

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Technical documentation

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Type Title Date
* Data sheet TPS6273x Step-Down Converter With Bypass Mode for Ultra Low-Power Wireless Applications datasheet (Rev. D) PDF | HTML 15 Dec 2014
Application note QFN and SON PCB Attachment (Rev. C) PDF | HTML 06 Dec 2023
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 Dec 2018
Analog Design Journal Understanding 100% mode in low-power DC/DC converters 22 Jun 2018
Analog Design Journal Achieving a clean startup by using a DC/DC converter with a precise enable-pin threshold 24 Oct 2017
Analog Design Journal Testing tips for applying external power to supply outputs without an input voltage 24 Oct 2016
Analog Design Journal Understanding frequency variation in the DCS-Control(TM) topology 30 Oct 2015
Application note Basic Calculation of a Buck Converter's Power Stage (Rev. B) 17 Aug 2015
Analog Design Journal Five steps to a great PCB layout for a step-down converter 29 Jan 2015
Analog Design Journal High-efficiency, low-ripple DCS-Control offers seamless PWM/pwr-save transitions 25 Jul 2013
User guide Step down converter with bypass mode (Rev. A) 21 Aug 2012
Application note How to Measure the Control Loop of DCS-Control Devices (Rev. A) 09 Aug 2012
Application note AN097 - Current Savings in CC254x Using the TPS62730 (Rev. B) 08 Feb 2012
Application note Understanding the Absolute Maximum Ratings of the SW Node (Rev. A) 13 Jan 2012
Application note Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs 19 Sep 2011
Analog Design Journal IQ: What it is, what it isn’t, and how to use it 17 Jun 2011

Design & development

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

Simulation model

TPS62733 PSpice Unencrypted Transient Model (Rev. A)

SLVM529A.ZIP (34 KB) - PSpice Model
Package Pins CAD symbols, footprints & 3D models
USON (DRY) 6 Ultra Librarian

Ordering & quality

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