LT3091MPDE#PBF

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

The LT3091MPDE#PBF is a negative linear regulator with a 1.5A output current and an input voltage range of –1.5V to –36V. It provides a rail-to-rail output voltage range from 0V to –32V. The device features low dropout voltage, typically 300mV at 1.5A load. Output noise is specified as 18µVRMS over the 10Hz to 100kHz bandwidth. Quiescent current is nominally 1.2mA, dropping below 1µA in shutdown mode. Ripple rejection reaches 85dB at 120Hz. The component utilizes a thermally enhanced 14-lead 4mm × 3mm DFN package.

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

• Precision programmable current limit controlled by a single external resistor
• Rail-to-rail output voltage adjustability down to zero volts
• Bidirectional shutdown logic supporting positive or negative control signals
• Integrated positive and negative current monitoring pins for system feedback

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

• Post regulation for switching power supplies
• Low noise instrumentation power systems
• RF supply conditioning circuits
• Rugged industrial power management
• Precision regulated power sources

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

Verify the MP grade designation confirms the extended temperature range of –55°C to 150°C. Confirm the DE suffix matches the required 14-lead DFN package configuration. Ensure the PBF suffix indicates lead-free finish compliance. Cross-reference the specific ordering code against manufacturer documentation to validate availability status.

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

Select this part when applications require high current capability without external heat sinks due to its low dropout characteristics. Consider the parallelable design if higher total output current is needed. Verify that the minimum load requirement of 20µA is met to maintain stability. Evaluate thermal performance based on the junction-to-ambient resistance of the selected package.

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

This component belongs to the LT3091 family of negative linear regulators. The MP grade variant specifically targets harsh environments requiring operation down to –55°C. The DE package option provides a compact surface-mount solution with exposed pad thermal connectivity. This series supports flexible configuration as a three-terminal floating regulator.

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

LT3091EDE#PBF (E-grade, same package)

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

How is the output voltage programmed?

The output voltage is set by connecting a single resistor between the SET pin and GND, utilizing a precision 50µA internal reference current.

What is the minimum output capacitor requirement?

The device requires a minimum output capacitance of 10µF with an ESR less than 500mΩ to ensure stability.