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Texas Instruments TPS62730 | Demoboard TIDA-00838
Step Down Converter with Bypass Mode for Ultra Low Power Wireless Applications
Overview
| Topology | Buck Converter |
| Input voltage | 1.9-3.9 V |
| Switching frequency | 3000 kHz |
| Output 1 | 2.3 V / 0.1 A |
| IC revision | 1.0 |
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
- RF4CE, Metering
- Low Power Wireless Applications
- CC2540 Bluetooth™ Low Energy
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | Q(%) | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IR(mA) | IR 2(mA) | ISAT(mA) | RDC(mΩ) | fres(MHz) | Type | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | Pitch(mm) | Ø D(mm) | Pins | Mount | IR(A) | Working Voltage(V (AC)) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 6.3 V(DC), 2.2 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 6.3 V(DC) | Capacitance2.2 µF | Capacitance±20% | Rated Voltage6.3 V (DC) | Size0402 | Operating Temperature -55 °C up to +85 °C | – | Dissipation Factor20 % | Insulation Resistance0.02 GΩ | Ceramic TypeX5R Class II | Length1 mm | Width0.5 mm | Height0.5 mm | Pad Dimension0.25 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WCAP-ATLI Aluminum Electrolytic Capacitors, 1200 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATLI Aluminum Electrolytic Capacitors | Capacitance1200 µF | Capacitance±20% | Rated Voltage10 V (DC) | – | – | – | Dissipation Factor14 % | – | – | Length20 mm | – | – | – | PackagingAmmopack | – | – | – | – | – | – | – | Endurance 5000 | Ripple Current1560 mA | Leakage Current120 µA | Pitch5 mm | Diameter10 mm | – | – | – | – | ||||
 | WE-PMI Power Multilayer Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMI Power Multilayer Inductor | – | – | – | Size0805 | Operating Temperature -40 °C up to +125 °C | Q-Factor23 % | – | – | – | Length2 mm | Width1.2 mm | Height1 mm | – | – | Inductance2.2 µH | Rated Current700 mA | Rated Current 21000 mA | Saturation Current700 mA | DC Resistance200 mΩ | Self Resonant Frequency50 MHz | TypeLow RDC | – | – | – | – | – | Pins2 | MountSMT | – | – | ||||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | – | Insulation Resistance1000 MΩ | – | Length5.08 mm | – | – | – | PackagingBag | – | – | – | – | – | – | TypeStraight | – | – | – | Pitch2.54 mm | – | Pins2 | MountTHT | Rated Current3 A | Working Voltage250 V (AC) |