LT1529IQ#TRPBF

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

The LT1529IQ#TRPBF is a 3A low dropout linear regulator with micropower quiescent current and shutdown, manufactured by Analog Devices Inc. It operates with an input voltage range of 3.8V to 15V and provides an adjustable output from 3.8V to 14V. The device features a typical dropout voltage of 600mV at 3A load and a quiescent current of 50µA, dropping to 16µA in shutdown mode. It is housed in a 5-lead DDPAK (TO-263) package.

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

• Micropower operation with 50µA quiescent current and 16µA shutdown current for battery efficiency
• Reverse battery protection allowing input voltages lower than output without reverse current flow
• Stable with small output capacitors, requiring only 22µF minimum
• Integrated thermal limiting and current limit protection

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

• Battery-powered systems
• Post regulator for switching supplies
• 5V to 3.3V logic regulators

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

Verify the ordering suffix #TRPBF confirms tape-and-reel packaging rather than tube. Confirm the IQ suffix indicates industrial temperature range (-45°C to 125°C). Ensure the manufacturer is identified as Analog Devices Inc. or Linear Technology. Cross-reference the pinout for the 5-lead DDPAK package to match schematic requirements.

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

Select this component when high output current up to 3A is required with minimal quiescent power consumption. The adjustable output version allows flexible voltage setting between 3.8V and 14V. Consider the thermal resistance characteristics of the DDPAK package for heat dissipation in high-load applications. Verify compatibility with available output capacitance values for stability.

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

The LT1529 series includes adjustable and fixed voltage variants (LT1529-3.3, LT1529-5). The IQ variant specifies industrial temperature performance. The #TRPBF suffix denotes reel packaging. This part belongs to the family of 3A low dropout regulators designed for efficiency and protection in portable electronics.

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

LT1529IQ#PBF

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

What is the minimum output capacitance required for stability?

The device is stable with a minimum output capacitor of 22µF.

How does the device handle reverse input voltage?

It withstands reverse voltages on the VIN pin up to 15V with no reverse current flow into the device, protecting both itself and the load.