IC-Hersteller Texas Instruments

IC-Hersteller (103)

Texas Instruments TPS62730 | Demoboard TIDA-00646

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

Details

TopologieAbwärtswandler
Eingangsspannung1.9-3.9 V
Schaltfrequenz3000 kHz
Ausgang 12.3 V / 0.1 A
IC-Revision1.0

Beschreibung

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.

Eigenschaften

  • 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

Typische Anwendungen

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

Weiterführende Informationen

Artikeldaten

Artikel Nr.
Daten­blatt
Simu­lation
Downloads
Status
Produktserie
C
Tol. C
VR(V (DC))
Bauform
Betriebstemperatur
Q(%)
DF(%)
RISO
Keramiktyp
L(mm)
B(mm)
H(mm)
Fl(mm)
Verpackung
L(µH)
IR 1(mA)
IR 2(mA)
ISAT(mA)
RDC(mΩ)
fres(MHz)
Typ
Endurance(h)
IRIPPLE(mA)
ILeak(µA)
Raster(mm)
Ø D(mm)
Pins
Montageart
IR(A)
Arbeitsspannung(V (AC))
Muster
WCAP-CSGP MLCCs 6.3 V(DC), 2.2 µF, ±20%
Simu­lation
Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
Kapazität2.2 µF
Kapazität±20% 
Nennspannung6.3 V (DC)
Bauform0402 
Betriebstemperatur -55 °C up to +85 °C
Verlustfaktor20 %
Isolationswiderstand0.02 GΩ
KeramiktypX5R Klasse II 
Länge1 mm
Breite0.5 mm
Höhe0.5 mm
Pad Dimension0.25 mm
Verpackung7" Tape & Reel 
WCAP-ATLI Aluminium-Elektrolytkondensatoren, 1200 µF, ±20%
Simu­lation
Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
Kapazität1200 µF
Kapazität±20% 
Nennspannung10 V (DC)
Verlustfaktor14 %
Länge20 mm
VerpackungAmmopack 
Endurance 5000
Rippelstrom1560 mA
Leckstrom120 µA
Raster5 mm
Durchmesser10 mm
WE-PMI Power-Multilayer-Induktivität, –, –
Simu­lation
Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
Bauform0805 
Betriebstemperatur -40 °C up to +125 °C
Güte23 %
Länge2 mm
Breite1.2 mm
Höhe1 mm
Induktivität2.2 µH
Nennstrom 1700 mA
Nennstrom 21000 mA
Sättigungsstrom700 mA
Gleichstromwiderstand200 mΩ
Eigenresonanzfrequenz50 MHz
TypLow RDC 
Pins
MontageartSMT 
WR-PHD Stiftleisten - Einreihig, –, –
Simu­lation
Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.
Betriebstemperatur -40 °C up to +105 °C
Isolationswiderstand1000 MΩ
Länge5.08 mm
VerpackungBeutel 
TypGerade 
Raster2.54 mm
Pins
MontageartTHT 
Nennstrom3 A
Arbeitsspannung250 V (AC)