MIC5317-3.3YMT-TZ

Product Overview

The MIC5317-3.3YMT-TZ from Microchip Technology is a single-output linear voltage regulator that provides a fixed positive 3.3 V supply. It is a surface-mount device in a compact 4-DFN (1x1) package with an exposed pad. The regulator accepts a maximum input voltage of 6 V and can deliver up to 150 mA. Its 39 µA quiescent current and enable control support low-power standby operation, while over-current and over-temperature protection features are included. The operating temperature range is -40°C to 125°C.

Key Features

• Fixed positive 3.3 V output from a single linear regulator channel
• Maximum input voltage of 6 V and output current capability of 150 mA
• Maximum dropout voltage of 0.31 V at 150 mA
• Quiescent current of 39 µA
• Enable control feature for output on/off management
• Over-current and over-temperature protection features
• Power supply rejection ratio of 80 dB to 65 dB from 1 kHz to 10 kHz
• Surface-mount 4-UDFN exposed-pad package with 4-DFN (1x1) device footprint

Applications

• 3.3 V regulator rail for compact microcontroller and sensor boards
• Low-power portable electronics where enable control and 39 µA quiescent current support standby operation
• Surface-mount power sections in compact devices using a 4-DFN (1x1) package
• Fixed 3.3 V supply for general electronics circuits that draw up to 150 mA and remain within a 6 V maximum input limit

Design & Procurement Notes

When selecting this regulator, confirm that the available input voltage does not exceed 6 V and that the load current remains at or below 150 mA. Because the maximum dropout voltage is 0.31 V at 150 mA, the input supply should provide headroom above 3.3 V for the intended load current. The enable control can be used to place the output in a disabled state during standby, while the fixed 3.3 V output simplifies designs that require a single positive rail. The 4-DFN (1x1) exposed-pad package supports surface-mount assembly, and the operating range is -40°C to 125°C, which should be checked against the board thermal environment. The PSRR is 80 dB to 65 dB from 1 kHz to 10 kHz, so it can be considered when evaluating input supply noise. Over-current and over-temperature protections are present, but board layout and thermal design should still be reviewed.