LTC1550LCMS8-2

Voltage Regulators - DC DC Switching Regulators Overview

The LTC1550LCMS8-2 is a low noise, switched capacitor regulated voltage inverter manufactured by Analog Devices. It operates with an input voltage range of 2.7 V to 5.25 V and provides a fixed output voltage of -2 V. The device delivers an output current of 20 mA with a typical ripple voltage below 1 mVp-p. Key electrical parameters include a switching frequency of 900 kHz, a maximum static current of 3.5 mA, and a shutdown feature. It functions within a temperature range of 0°C to +70°C and is housed in an 8-pin MSOP package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates internal linear post-regulation to minimize output ripple
• Provides fixed negative output voltage generation from positive supply
• Includes shutdown control for power management

Voltage Regulators - DC DC Switching Regulators Applications

• GaAs FET bias generation
• Negative rail supply for analog circuits
• Low noise voltage inversion in portable electronics

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix designation when ordering, as it indicates packaging configuration such as tube or tape-and-reel. Confirm that the required part number matches the exact output voltage specification of -2 V. Ensure the manufacturer source is identified correctly as Analog Devices or its predecessor Linear Technology. Cross-reference the datasheet revision to ensure compatibility with design requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a stable negative voltage rail is required without using inductors. The internal regulation ensures low output noise suitable for sensitive analog applications. Consider the 20 mA current limit and the 900 kHz switching frequency when designing the external capacitor network. Verify that the input voltage remains within the 2.7 V to 5.25 V operational window.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LTC1550L family of switched capacitor voltage inverters. Other variants in the series provide different fixed output voltages, such as -2.5 V and -4 V. The family shares common architectural features including charge pump topology and linear post-regulation. The MSOP-8 package is standard across these variants for space-constrained designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same family include LTC1550LCMS8-2.5#PBF and LTC1550LCMS8-4.1#PBF, provided the circuit can accommodate their respective -2.5 V and -4.1 V outputs. Verify pinout compatibility and thermal characteristics before substitution.