LTC3221EDC-5#TRPBF

Voltage - Output (Min/Fixed):	5V
Base Part Number:	LTC3221
Supplier Device Package:	6-DFN (2x2)
Package / Case:	6-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	600kHz
Current - Output:	60mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LTC3221EDC-5#TRPBF is a single cell lithium-ion/LiFePO4 battery application DC/DC switching regulator. It is a step-down, fixed frequency, current-mode DC/DC switching regulator. The device can deliver up to 3A continuous output current to provide high power density and low voltage applications. It also has a wide range of programming options, as well as output voltage accuracy of ± 5%.

Application Fields

The DC/DC switching regulator of the LTC3221EDC-5#TRPBF can be used in a wide range of applications. These include but are not limited to wearable electronics, Industrial Automation, IoT, Computer Peripheral, medical devices, and the Consumer Electronics market. It is especially designed for single cell Li-ion/LiFePO4 battery applications due to its 3A continuous output current.

Working Principle

The LTC3221EDC-5#TRPBF operates in current-mode control. The device uses an internal oscillator running at a fixed frequency set by the frequency select pin. The current-mode control provides fast response and stability to changes in load and line conditions. The overvoltage protection (OVP) feature prevents the output from going above its specified set point, protecting the load from temporary overvoltage events. The LTC3221EDC-5#TRPBF also uses an internal low resistance P-channel MOSFET switch and an internal Low On Resistance (LOR) current sensing circuit to ensure efficient current measurements in low voltage applications. In addition, the device also has a Power Good signal that indicates when the output voltage has reached the programmed level and is ready for use.

Conclusion

The LTC3221EDC-5#TRPBF is a single cell lithium-ion/LiFePO4 battery application DC/DC switching regulator. It is a step-down, fixed frequency, current-mode DC/DC switching regulator. The device can deliver up to 3A continuous output current and has a wide range of programming options, as well as output voltage accuracy of ± 5%. It is suitable for a wide range of applications, especially designed for single cell Li-ion/LiFePO4 battery applications. It uses an internal oscillator running at a fixed frequency set by the frequency select pin, an Internal p-channel MOSFET switch, a low on resistance (LOR) current sensing circuit, and an overvoltage protection feature to ensure a safe operating environment and efficient performance.

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