tps62730 –step down converter for low-power rf …...• tps62730 is a voltage regulator perfect...

TPS62730–step down converter

TI Information – Selective Disclosure 1

TPS62730–step down converter

for low-power RF applications.

Briefing presentation

Presented by: Thomas Hoffman

Why was the part developed?

TI Information – Selective Disclosure2

Market Situation

• Mobility is an unbreakable trend mostly driven by

convenience and hunger for information

• Mobile devices allow for simple patient monitoring

while increasing life quality

• Smart Metering enables flexible control of power

needs through simple consumer interaction

• Building technologies support a flexible adjustment

to life style and yet support reduce overall power

BT Accessories

Metering

Building

Technologies

TI Information – Selective Disclosure

to life style and yet support reduce overall power

consumption

• Most of the latest DC-DC Converters reach

efficiencies greater 90% and so other approaches

are needed to reduce power consumption or extend

application run time.

• Some applications are challenged to guarantee an

operating life through one battery of up to 10 years

Sports gear

Portable Medical

Smart Phone

Why was the part developed?

• Applications using low-power RF devices that run on a battery have

been burning more energy than necessary.

• One approach to solve the problem:

– One approach to avoid additional energy loss is to connect the battery to the

load without any additional voltage regulation, which adds cost and space.

– The load itself is still burning more energy than needed while operating

directly from the battery. This is because the minimum supply voltage of

these devices is already close to the level of a discharged battery – every


these devices is already close to the level of a discharged battery – every

input voltage about that level is a waste.

– Not a solution to the problem.

Need for a solution!

Real solution, with real power savings.


New supply concept for wireless Apps

Historical Power Concept:System powered directly from battery

Wanted- keep ultra low Iq in sleep mode

- Reduce current consumption during Transmission

- Increase battery life time

Low powerController(MSP430)

Low Power

Buck Conversionto ~ 2V

Bypass Mode


Low powerController(MSP430)

Low Power Wireless(CCXXXX)

Sensors

New Power Concept:

• Sleep mode:

system directly powered from battery

• RF operation:

DC/DC conversion reduces power consumption

Low Power Wireless(CCXXXX)

Sensors

TPS62730 (TPS_Radio)100mA Low Noise DC/DC solution with Bypass Mode

• Selectable or Automatic Transition from DC/DC

to bypass mode

• Up to 95% Efficiency, 25uA (typ.) Quiescent

Current and 30nA (typ.) Shutdown Current

• Excellent low Output Voltage Ripple

• DCS-Control™ topology

• Extends application run time between 20% to 30%

• Support reduction of total power consumption from

battery

• Makes this device ideal for RF applications

• Enables seamless transition into Power Save Mode

and excellent AC line and transient load regulation

• Small external components and small IC package

allow for solution size of <12mm2


• Package: 1mm x 1.5mm QFN and 0402 caps,

0603 inductor

• BLE (Bluetooth Low Energy)

• MSP430 and alike controller supply

• HVAC (Heating, Ventilating, and Air

Conditioning)

• RF4CE (ZigBee)

• Metering

• Smoke Detectors

allow for solution size of <12mm2

TPS62730

VIN

ON/BYP STAT

GND VOUT

SW

V

2.1VOUTV

1.9V - 3.9VIN

C2.2

IN

µF

C2.2

OUT

µF

L 2.2 Hµ

ONBYP

TPS62730EVM-726

New! 100mA Low Noise DC/DC solution

with Bypass Mode: TPS62730 (TPS_Radio)

• Extends application run time between 20% to 30%

• Support reduction of total power consumption from battery

• Makes this device ideal for RF applications

• Enables seamless transition into Power Save Mode and

excellent AC line and transient load regulation

• Small external components and small IC package allow for

solution size of <12mm2


TPS62730EVM-726

• Selectable or Automatic Transition from DC/DC to bypass mode

• Up to 95% Efficiency, 25uA (typ.) Quiescent Current and 30nA

(typ.) Shutdown Current

• Excellent low Output Voltage Ripple

• DCS-Control™ topology

• Package: 1mm x 1.5mm QFN and 0402 caps, 0603 inductor

Product overview

TPS62730 is a high frequency synchronous step-down DC/DC

converter optimized for ultra low-power wireless applications, such as

TI’s low power wireless sub 1-GHz and 2.4 GHz RF transceivers. The

device reduces the current consumption drawn from the battery during

TX and RX mode by high-efficient step-down voltage conversion.

• Applications include:

– Bluetooth® low energy systems


– Metering

– Building technologies

– Mobile phones

– Consumer electronics

– Medical and human interface devices

Order of Target Customer Preferences

1.Power Saving

– Efficiency of up to 95%

– Active control through RF device enables

20-30% reduction of battery current

2.Performance

– Superior EMI and noise performance


– Superior EMI and noise performance

– No compromise on RF transmission power

3.Size

– Solution size <12% allows for fitting it easily on

the main PCB

– Max 1mm solution height

TPS62730: Power Savings100mA Low Noise DC/DC solution with Bypass Mode

TX Current Analysis CC430 / TPS62730

15.0E -3

20.0E -3

25.0E -3

30.0E -3

35.0E -3

40.0E -3


• Battery current is significantly reduced by adding TPS62730 to the solution

• High capacity batteries are expensive; an additional regulator is quickly

compensated through the power savings

000.0E+0

5.0E -3

10.0E -3

~11 10 0 -6 ~11 10 0 -6 ~11 10 0 -6

dBm dBm dBm

VCC: 3.0V VCC: 3.3V VCC: 3.6V

CC430 & TPS62730 Bypass 37.8E-3 34.8E-3 17.9E-3 15.0E-3 37.8E-3 34.9E-3 17.9E-3 15.0E-3 37.9E-3 34.8E-3 18.0E-3 15.1E-3

CC430 & TPS62730 29.6E-3 27.3E-3 14.1E-3 11.8E-3 27.1E-3 25.2E-3 12.9E-3 10.8E-3 25.3E-3 23.3E-3 11.9E-3 10.0E-3

TPS62730: Performance100mA Low Noise DC/DC solution with Bypass Mode


• Superior EMI and noise performance

• DCS-Control™ topology allows

• Fast AC line and transient load response

• Smooth transition between PWM and Power Save Mode

• Low output voltage ripple

TPS62730

VINC1

L1

TPS62730: Solution Size100mA Low Noise DC/DC solution with Bypass Mode


Proposed components size:

CIN, COUT: 0402 (1x0.5mm2)

L = 2012 size (2x1.2mm2)

IC: 1x1.5mm size (1.5mm2)

• Small solution footprint allows for fitting it

easily on the main PCB

• 1mm max solution height

GND VOUT

1

C2Total area is less

than 12mm²

TPS62730 target applications

• Metering– Gas, Water, Electricity Meter

– Heat cost allocator

– Consumer Interface

• Fitness & Healthcare:– Wearable monitoring

– Sports gear

• TPS62730 is a voltage regulator perfect for power-constrained applications

• High efficiency and low noise allow the POL regulator to support Low Power RF and BLE devices to either run longer with a given


• Bluetooth Accessories:– Headsets

– Consumer Audio

• Building Management:– Light, Heat and Safety mash networks

– Security & Surveillance

• Mobile phone– Smart Phones

– Feature Phones

Power RF and BLE devices to either run longer with a given battery or reduce costly battery capacity

Implementation diagrams


TPS62730 and CC2540 Bluetooth® low energy system-on-chip device


TPS62730 and CC430 low power MCU


tps62730 –step down converter for low-power rf …...• tps62730 is a voltage regulator perfect...

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