LTC3026IDD-1#PBF

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

The LTC3026IDD-1#PBF is a very low dropout (VLDO) linear regulator manufactured by Analog Devices Inc. It operates with input voltages from 1.14V to 5.5V and provides an adjustable output voltage range of 0.4V to 2.6V. The device delivers up to 1.5A of continuous output current with a typical dropout voltage of 100mV at full load. It requires an external 5V supply on the BIAS pin for operation, as the internal boost converter is disabled. Key electrical parameters include a typical operating current of 95μA and a shutdown current below 1μA. The component is housed in a 10-lead 3mm × 3mm DFN package.

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

• Very low dropout performance enabling efficient regulation at minimal input-output voltage differentials
• Integrated reverse output current protection to prevent backflow into the input supply
• Internal thermal limiting and short-circuit current protection for robust fault handling
• Open-drain power good indicator signaling valid regulation status

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

• Post-regulator for switching supplies to reduce noise
• Microprocessor core voltage supply
• High-efficiency linear regulation from low input voltages

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

Verify the specific suffix IDD-1 confirms the disabled boost converter variant requiring an external 5V bias supply. Ensure the package designation matches the required thermal and footprint constraints. Confirm RoHS compliance status through official manufacturer documentation prior to integration.

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

Select this component when input voltages are close to the desired output level, necessitating minimal dropout voltage. The requirement for an external 5V BIAS supply must be accommodated in the system design. Consider the thermal impedance of the PCB layout to ensure junction temperatures remain within safe operating limits during high-current operation.

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

This part belongs to the LTC3026 family of VLDO regulators. The -1 suffix distinguishes it from the standard LTC3026 by disabling the internal boost converter, replacing the SW pin with GNDS and the BST pin with BIAS. This configuration allows for simpler designs where an external bias source is available, eliminating the need for an inductor.

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

LTC3026EDD-1#PBF

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

What is the function of the BIAS pin?

The BIAS pin requires an external 5V supply to drive the internal LDO circuitry, as the boost converter is disabled in this variant.

How is the output voltage adjusted?

The output voltage is programmed using two external resistors connected to the ADJ pin, which maintains a reference voltage of 0.4V.