I

With TPS62730

BAT

15

17

19

21

23

25

27

29

2

2.2

2.4

2.6

2.8

3

3.2

3.4

3.6

3.8

Battery Voltage - V

BAT

Battery Current

Reduction @

CC2540

0dBm CW TX

Power

Battery Current Reduction of CC2540

2.4GHz Bluetooth Low Energy

System-On-Chip Solution

I

NO TPS62730

BAT

TPS62730

VIN

ON/BYP

STAT

GND

VOUT

SW

V

2.1V

OUT

V

2.2V - 3.9V*

IN

C

2.2

IN

µF

C

2.2

OUT

µF

L 2.2 H

m

ON

BYP

* At V < 2.2V, V

tracks V

IN

OUT

IN

R

pullup

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Folder

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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

3 Description

The TPS62730 is a high frequency synchronous step-

1

•

down DC-DC converter optimized for ultra low-power

•

Typ. 30-nA Ultra Low-Power Bypass Mode

wireless applications. The device is optimized to

•

Typ. 25-

μA DC-DC Quiescent Current

supply TI's Low-Power Wireless sub 1-GHz and 2.4-

GHz RF transceivers and System-On-Chip (SoC)

•

Internal Feedback Divider Disconnect

solutions.

The

TPS62730

reduces

the

current

•

Typical 2.1-

consumption drawn from the battery during TX and

RX mode by a high efficient step-down voltage

•

Automatic Transition from DC-DC to Bypass Mode

conversion. The device provides an output current of

up to 100 mA and allows the use of tiny and low-cost

•

Up to 3-MHz Switch Frequency

chip inductors and capacitors. With an input voltage

•

Up to 95% DC-DC Efficiency

range of 1.9 V to 3.9 V, the device supports Li-

•

Open-Drain Status Output STAT

primary battery chemistries such as Li-SOCl2, Li-

•

Output Peak Current up to 100 mA

SO2, Li-MnO2, and also two cell alkaline batteries.

•

Fixed Output Voltages 1.9 V, 2.05 V, 2.1 V, 2.3 V

The TPS62730 features an Ultra Low-Power bypass

mode with typical 30-nA current consumption to

•

Small External Output Filter Components 2.2

μH

support sleep and low power modes of TI's CC2540

and 2.2

μF

Bluetooth Low Energy and CC430 SoC solutions. In

•

Optimized For Low Output Ripple Voltage

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.

Device Information(1)

2 Applications

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

CC2540 Bluetooth™ Low-Energy

TPS62730

System-On-Chip Solution

TPS62732

USON (6)

1.45 mm x 1.00 mm

•

Low-Power Wireless Applications

TPS62733

•

RF4CE, Metering

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Typical Application

Battery Current Reduction Using TPS62730

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.