IC manufacturers Texas Instruments

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Texas Instruments TPS62730 | Demoboard TIDA-00646

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

Overview

TopologyBuck Converter
Input voltage1.9-3.9 V
Switching frequency3000 kHz
Output 12.3 V / 0.1 A
IC revision1.0

Description

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 1GHz and 2.4GHz RF transceivers and System-On-Chip- solutions. The TPS62730 reduces the current consumption drawn from the battery during TX and RX mode by a high efficient stepdown voltage conversion. It provides up to 100mA output current and allows the use of tiny and low cost chip inductors and capacitors. With an input voltage range of 1.9V to 3.9V the device supports Li-primary batterychemistries 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 30nA current consumption to support sleep and low power modes of TI's CC2540Bluetooth Low Energy and CC430 System-On-Chip solutions. In this bypass mode, the output capacitor of the DC/DC converter is connected via anintegrated typ. 2.1Ω 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 3MHz, the TPS62730 features low output ripple voltage and low noise even with a small 2.2uF 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 × 1.5mm2 6 pin QFN package.

Features

  • Input Voltage Range VIN from 1.9V to 3.9V
  • Typ. 30 nA Ultra Low Power Bypass Mode
  • Typ. 25 μA DC/DC Quiescent Current
  • Internal Feedback Divider Disconnect
  • Typ. 2.1Ω Bypass Switch between VIN and VOUT
  • Automatic Transition from DC/DC to Bypass Mode
  • Up To 3MHz switch frequency
  • Up to 95% DC/DC Efficiency
  • Open Drain Status Output STAT
  • Output Peak Current up to 100mA
  • Fixed Output Voltages 1.9V, 2.05V, 2.1V, 2.3V
  • Small External OutputFilterComponents 2.2μH/ 2.2μF
  • Optimized For Low Output Ripple Voltage
  • Small 1 × 1.5 × 0.6mm3 SON Package
  • 12 mm2 Minimum Solution Size

Typical applications

  • CC2540 Bluetooth™ Low Energy
  • RF4CE, Metering
  • Low Power Wireless Applications

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureQDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
Fl
(mm)
L
(µH)
IR
(mA)
IR 2
(mA)
ISAT
(mA)
RDC
(mΩ)
fres
(MHz)
Endurance
(h)
Operating TemperatureIRIPPLE
(mA)
ILeak
(µA)
Pitch
(mm)
Ø D
(mm)
Pins (Value)
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples
885012105007SPEC
6 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 6.3 V(DC)2.2 µF ±20% 6.3 0402 -55 °C up to +85 °C 200.02 GΩ X5R Class II 1 0.5 0.25 -55 °C up to +85 °C 0.5 7" Tape & Reel
860080275017SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.WCAP-ATLI Aluminum Electrolytic Capacitors1200 µF ±20% 10 14 20 5000 -55 °C up to +105 °C 1560 120 5 10 Ammopack
74479775222ASPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-PMI Power Multilayer Inductor 0805 -40 °C up to +125 °C 23 2 1.2 2.2 700 1000 700 200 50 -40 °C up to +125 °C 2 1 Low RDC
61300211121SPEC
6 files Active i| Production is active. Expected lifetime: >10 years.WR-PHD 2.54 mm THT Pin Header -40 °C up to +105 °C1000 MΩ 5.08 2.54 2 Single Pin Header Straight 3 Bag
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureQDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
Fl
(mm)
L
(µH)
IR
(mA)
IR 2
(mA)
ISAT
(mA)
RDC
(mΩ)
fres
(MHz)
Endurance
(h)
Operating TemperatureIRIPPLE
(mA)
ILeak
(µA)
Pitch
(mm)
Ø D
(mm)
Pins (Value)
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples