LT1521CMS8-3.3#PBF

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LT1521CMS8-3.3#PBF is a low dropout regulator with micropower quiescent current and shutdown, manufactured by Analog Devices Inc. It provides a fixed 3.3V output at up to 300mA with a typical dropout voltage of 0.5V. The device operates with a quiescent current of 12µA and reduces to 6µA in shutdown mode. It features reverse battery protection, thermal limiting, and stable operation with small ceramic output capacitors as low as 1.5µF.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Micropower quiescent current with dedicated shutdown control
• Reverse input and output voltage protection without external diodes
• Stable with minimal output capacitance for enhanced manufacturability

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Battery-powered systems requiring extended operational life
• Backup power situations where input may be reversed or grounded
• Post-regulation for switching supplies

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix matches the required package and temperature grade. Confirm RoHS compliance status through official manufacturer documentation before procurement. Ensure the component source is an authorized distributor to guarantee authenticity and traceability.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this part for applications needing a fixed 3.3V rail with low standby consumption. Consider the MSOP-8 package constraints for thermal management. Verify that the load transient requirements are met by the minimum 1.5µF output capacitance specification.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the LT1521 series of low dropout regulators. The series includes adjustable versions and other fixed voltage options such as 3V and 5V variants. All share common features like micropower operation and reverse voltage protection within the same family architecture.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

LT1521CMS8-3#PBF

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How does the LT1521CMS8-3.3#PBF handle reverse battery connections?

The device withstands reverse voltages on the input pin up to 20V. It acts as if there is a diode in series with its input, preventing reverse current flow into the regulator and protecting both itself and the load.

What is the minimum output capacitance required for stability?

The LT1521CMS8-3.3#PBF is stable with a minimum output capacitor of 1.5µF, allowing the use of small ceramic capacitors which enhances manufacturability compared to older devices requiring larger values.