TPS62730_15 Datasheet, PDF (1/27 Pages) Texas Instruments – TPS6273x Step-Down Converter With Bypass Mode for Ultra Low-Power Wireless Applications

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TPS62730, TPS62732, TPS62733
SLVSAC3D – MAY 2011 – REVISED DECEMBER 2014
TPS6273x Step-Down Converter With Bypass Mode for Ultra Low-Power Wireless
Applications
1 Features
•1 Input Voltage Range V_IN 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 V_IN and
V_OUT
• 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
3 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 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.
2 Applications
• CC2540 Bluetooth™ Low-Energy
System-On-Chip Solution
• Low-Power Wireless Applications
• RF4CE, Metering
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPS62730
TPS62732
USON (6)
1.45 mm x 1.00 mm
TPS62733
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application
V_IN
2.2V - 3.9V*
C_IN
2.2µF
ON
BYP
TPS62730
VIN
GND
SW
VOUT
ON/BYP STAT
V_OUT
L 2.2mH _2.1V
C_OUT
2.2µF
R_pullup
* At V_IN < 2.2V, V_OUT tracks V_IN
Battery Current Reduction Using TPS62730
29
I_BAT NO TPS62730
27
25
Battery Current
Reduction @
23
CC2540
0dBm CW TX
Power
21
I_BAT With TPS62730
19
Battery Current Reduction of CC2540
17
2.4GHz Bluetooth Low Energy
System-On-Chip Solution
15
2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8
Battery Voltage - V_BAT
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.