LTC3221
LTC3221
PRODUCTIONMicropower, Regulated Charge Pump in 2 x 2 DFN
- Part Models
- 6
- 1ku List Price
- Starting From $2.72
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Overview
- Ultralow Power: 8μA Quiescent Current
- Regulated Output Voltages: 3.3V ±4%, 5V ±4%, ADJ
- VIN 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 VIN
- Burst Mode Control
- Short-Circuit Protected
- Solution Profi le < 1mm
- Tiny 2mm × 2mm 6-Pin DFN Package
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 VIN and VOUT) 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 VOUT 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
Documentation
Data Sheet 1
User Guide 1
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) | ||
| LTC3221EDC#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3221EDC-3.3#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3221EDC-3.3#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3221EDC-5#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3221EDC-5#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareTools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3221
- LTC3221-3.3
- LTC3221-5
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC3221EDC-3.3 Demo Board | Micropower Regulated Charge Pump, 1.8V ≤ VIN ≤ 4.4V, VOUT = 3.3V @ Up to 60mA
Resources
LTC3221EDC-5 Demo Board | Micropower Regulated Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 5V @ Up to 60mA
Resources
LTC3221EDC Demo Board | Micropower Regulated Adjustable Output Charge Pump, 1.8V ≤ VIN ≤ 3.8V, VOUT = 3V @ Up to 60mA