LTC3330

1

3330p

For more information www.linear.com/LTC3330

Typical applicaTion

FeaTures

DescripTion

Energy Harvesting DC/DC

with Battery Backup

The LTC®3330 integrates a high voltage energy harvesting

powersupplyplusaDC/DCconverterpoweredbyaprimary

cell battery to create a single output supply for alternative

energy applications. The energy harvesting power supply,

consisting of an integrated full-wave bridge rectifier and a

high voltage buck converter, harvests energy from piezo-

electric, solar, or magnetic sources. The primary cell input

powers a buck-boost converter capable of operation down

to 1.8V at its input. Either DC/DC converter can deliver en-

ergy to a single output. The buck operates when harvested

energy is available, reducing the quiescent current draw

on the battery to essentially zero. The buck-boost takes

over when harvested energy goes away.

A low noise LDO post regulator and a supercapacitor

balancer are also integrated, accommodating a wide range

of output storage configurations.

Voltage and current settings for both inputs and outputs

are programmable via pin-strapped logic inputs.

TheLTC3330isavailableina5mm×5mmQFN-32package.

applicaTions

n

Dual Input, Single Output DC/DC’s with Input

Prioritizer

Energy Harvesting Input: 3.0V to 18V Buck DC/DC

Primary Cell Input: 1.8V to 5.5V Buck-Boost DC/DC

n

Harvested Energy

n

Ultralow Quiescent Current: 900nA at No-Load

n

Low Noise LDO Post Regulator

n

Integrated Supercapacitor Balancer

n

Up to 50mA of Output Current

n

Programmable DC/DC and LDO Output Voltages,

Buck UVLO, and Buck-Boost Peak Input Current

n

Integrated Low Loss Full-Wave Bridge Rectifier

n

n

5mm × 5mm QFN-32 Package

n

Energy Harvesting

n

Solar Powered Systems with Primary Cell Backup

n

Wireless HVAC Sensors and Security Devices

n

Mobile Asset Tracking

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

PIEZO

MIDE

V25W

1µF

6V

4.7µF, 6V

GND

LTC3330

3330 TA01a

AC1

CAP

BAT

OUT[2:0]

LDO[2:0]

IPK[2:0]

UV[3:0]

AC2

SW

SWA

22µH

22µH

SWB

LDO_IN

SCAP

BAL

LDO_EN

EH_ON

PGVOUT

PGLDO

LDO_OUT

3V TO 18V

4V TO 18V

SOLAR

PANEL

1µF

6V

PRIMARY

CELL

1.8V TO 5.5V

10µF

25V

3

3

3

4

+

1µF

6V

2.2µF

6V

1.2V TO 3.6V

50mA

1.2V TO 5V

50mA

10mF

2.5V

10mF

2.5V

OPTIONAL

22µF

6V

+

–

Electrical Specifications Subject to Change