LTC3221

PRODUCTION

LTC3221

Micropower, Regulated Charge Pump in 2 x 2 DFN

PRODUCTION

No-Load Input Current vs Supply Voltage slide

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Part Models 6

1ku List Price Starting From $2.15

Features

Ultralow Power: 8μA Quiescent Current
Regulated Output Voltages: 3.3V ±4%, 5V ±4%, ADJ
V_IN Range:
- 1.8V to 4.4V (LTC3221-3.3)
- 2.7V to 5.5V (LTC3221-5)
Output Current: Up to 60mA
No Inductors Needed
Very Low Shutdown Current: <1μA
Shutdown Disconnects Load from V_IN
Burst Mode Control
Short-Circuit Protected
Solution Profi le < 1mm
Tiny 2mm × 2mm 6-Pin DFN Package

Additional Details

The LTC3221 family are micropower charge pump DC/DC converters that produce a regulated output at up to 60mA. The input voltage range is 1.8V to 5.5V. Extremely low operating current (8μA typical at no load) and low external parts count (one flying capacitor and two small bypass capacitors at V_IN and V_OUT) make them ideally suited for small, battery-powered applications.

The LTC3221 family includes fi xed 5V and 3.3V output versions plus an adjustable version. All parts operate as Burst Mode^® switched capacitor voltage doublers to achieve ultralow quiescent current. The chips use a controlled current to supply the output and will survive a continuous short-circuit from V_OUT to GND. The FB pin of the adjustable LTC3221 can be used to program the desired output voltage.

The LTC3221 family is available in a low profile (0.75mm) 2mm × 2mm 6-pin DFN package.

Applications

Low Power 2 AA Cell to 3.3V Supply
Memory Backup Supplies
Tire Pressure Sensors
General Purpose Low Power Li-Ion to 5V Supply
RF Transmitters
Glucose Meters

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 6

1ku List Price Starting From $2.15

Technical Documents 3

LTC3221: Micropower, Regulated Charge Pump in 2 x 2 DFN Data Sheet 11/21/2007

R415 Reliability Data 03/23/2018

DC862A - Demo Manual 09/24/2009

Design Resources 6

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3221EDC#TRMPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3221EDC#TRPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3221EDC-3.3#TRMPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3221EDC-3.3#TRPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3221EDC-5#TRMPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3221EDC-5#TRPBF	6-Lead DFN (2mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3221EDC#TRMPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3221EDC#TRPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3221EDC-3.3#TRMPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3221EDC-3.3#TRPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3221EDC-5#TRMPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3221EDC-5#TRPBF
Pin/Package Drawing
6-Lead DFN (2mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

DC862A-B

LTC3221EDC-5 Demo Board | Micropower Regulated Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 5V @ Up to 60mA

DC862A-B

LTC3221EDC-5 Demo Board | Micropower Regulated Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 5V @ Up to 60mA

Buy Now View Details

Product Detail

Demonstration circuit 862 is a micropower regulated charge pump DC/DC converter featuring the 60mA output LTC3221 in a 2mm × 2mm DFN package. It comes in three assembly versions, DC862A-A, DC862A-B and DC862A-C, featuring the LTC3221EDC-3.3 (fixed 3.3V output), the LTC3221EDC-5 (fixed 5V output) , and LTC3221EDC (adjustable output set to 3V), respectively. The demo board input voltage range depends on the IC used; for the 5V output DC862A-B, the input voltage range is 2.7V to 5.5V.

The LTC3221's low 8µA no-load quiescent current is even lower than the self-discharging current of many batteries. By employing a constant current to charge the output, the output ripple is low even at high input and light load, and is fairly constant over the full input voltage range.

Resources

PDF

DC862A - Schematic

21.00K

PDF

DC862A - Demo Manual

240.00K

ZIP

DC862A - Design File

437.00K

DC862A-A

LTC3221EDC-3.3 Demo Board | Micropower Regulated Charge Pump, 1.8V ≤ VIN ≤ 4.4V, VOUT = 3.3V @ Up to 60mA

DC862A-A

LTC3221EDC-3.3 Demo Board | Micropower Regulated Charge Pump, 1.8V ≤ VIN ≤ 4.4V, VOUT = 3.3V @ Up to 60mA

Buy Now View Details

Product Detail

Demonstration circuit 862 is a micropower regulated charge pump DC/DC converter featuring the 60mA output LTC3221 in a 2mmx2mm DFN package. It comes in three assembly versions, DC862A-A, DC862A-B and DC862A-C, featuring the LTC3221EDC-3.3 (fixed 3.3V output), the LTC3221EDC-5 (fixed 5V output) , and LTC3221EDC (adjustable output set to 3V), respectively. The demo board input voltage range depends on the IC used; for the 3.3V output DC862A-A, the input voltage range is 1.8V to 4.4V.

Resources

PDF

DC862A - Schematic

21.00K

PDF

DC862A - Demo Manual

240.00K

ZIP

DC862A - Design File

437.00K

DC862A-C

LTC3221EDC Demo Board | Micropower Regulated Adjustable Output Charge Pump, 1.8V ≤ VIN ≤ 3.8V, VOUT = 3V @ Up to 60mA

DC862A-C

LTC3221EDC Demo Board | Micropower Regulated Adjustable Output Charge Pump, 1.8V ≤ VIN ≤ 3.8V, VOUT = 3V @ Up to 60mA

Buy Now View Details

Product Detail

Demonstration circuit 862 is a micropower regulated charge pump DC/DC converter featuring the 60mA output LTC3221 in a 2mm × 2mm DFN package. It comes in three assembly versions, DC862A-A, DC862A-B and DC862A-C, featuring the LTC3221EDC-3.3 (fixed 3.3V output), the LTC3221EDC-5 (fixed 5V output) , and LTC3221EDC (adjustable output set to 3V), respectively. The demo board input voltage range depends on the IC used; for the adjustable output DC862A-C, the input voltage range is 1.8V to 3.8V.

Resources

PDF

DC862A - Schematic

21.00K

PDF

DC862A - Demo Manual

240.00K

ZIP

DC862A - Design File

437.00K

DC862A-B

LTC3221EDC-5 Demo Board | Micropower Regulated Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 5V @ Up to 60mA

DC862A-A

LTC3221EDC-3.3 Demo Board | Micropower Regulated Charge Pump, 1.8V ≤ VIN ≤ 4.4V, VOUT = 3.3V @ Up to 60mA

DC862A-C

LTC3221EDC Demo Board | Micropower Regulated Adjustable Output Charge Pump, 1.8V ≤ VIN ≤ 3.8V, VOUT = 3V @ Up to 60mA

LTspice 1

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To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.