Microchip Technology MIC5317-3.0YMT-TZ

Overview

MIC5317-3.0YMT-TZ from Microchip Technology is a high-performance 150 mA low-dropout (LDO) regulator in a 1 mm × 1 mm UDFN-4 package, delivering a fixed 3.0 V output with ±2% initial accuracy over –40°C to +125°C. It operates from 2.5 V to 6.0 V input, achieves 155 mV dropout at 150 mA load, and maintains stability with only 1 μF ceramic output capacitance-ideal for space-constrained USB dongles and battery-powered cameras.

For engineers reviewing the MIC5317-3.0YMT-TZ datasheet, MIC5317-3.0YMT-TZ pinout, MIC5317-3.0YMT-TZ application, or MIC5317-3.0YMT-TZ equivalent, key selection criteria include its ultra-small footprint, 29 μA quiescent current in active mode, 0.05 μA shutdown current, 70 dB PSRR at 1 kHz, and thermal-shutdown/current-limit protection for robust operation in portable electronics.

Technical Context

The MIC5317-3.0YMT-TZ implements a CMOS-based LDO architecture with an active-high enable input (EN), requiring no external biasing and mandating connection to avoid floating states. Its internal reference and error amplifier deliver tight line regulation (0.02% typical) and load regulation (10 mV typical from 100 μA to 150 mA).

Designed for minimal board area, it uses a 4-pin UDFN-4 package with exposed thermal pad (ePAD), supporting high power density while maintaining junction temperatures up to +125°C. The device draws only 29 μA ground current at zero load and drops to 0.05 μA in shutdown-enabling long battery life in always-on keep-alive circuits.

Key Specifications

Pinout & Package

Package: 4-lead 1 mm × 1 mm UDFN (MT), RoHS-compliant, with exposed thermal pad (ePAD) that must be soldered to PCB ground for thermal performance and electrical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MCP1700-3002E/TO and XC6206P302MR-G, MIC5317-3.0YMT-TZ delivers superior thermal management via ePAD, 25 dB higher PSRR, and integrated fault protection-making it the preferred choice for compact, high-reliability portable electronics where board area and noise immunity are critical.

Availability

MIC5317-3.0YMT-TZ is available at Aetrix Electronics and suitable for USB dongles, wireless LAN modules, and digital still/video cameras requiring stable component supply with full traceability and lifecycle continuity.

Supply support for MIC5317-3.0YMT-TZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a global provider of microcontrollers, analog, FPGA, and power management semiconductors, with a focus on embedded control and connectivity solutions.

The MIC5317 product line delivers ultra-compact, high-PSRR LDOs optimized for space-constrained portable electronics-including USB peripherals, imaging systems, and battery-powered IoT endpoints-where minimal footprint and low quiescent current are mandatory.

FAQ

What is the maximum input voltage for MIC5317-3.0YMT-TZ?

The absolute maximum input voltage for MIC5317-3.0YMT-TZ is +7 V, but the recommended operating range is +2.5 V to +6.0 V. Exceeding 6.0 V may trigger internal protection or reduce reliability. The device's 155 mV dropout at 150 mA means it regulates cleanly down to 3.155 V input-ideal for use with 3.3 V or single-cell Li-ion sources. Always observe derating curves in the datasheet for thermal limits at high VIN–VOUT differentials.

Does MIC5317-3.0YMT-TZ require an input capacitor?

Yes, MIC5317-3.0YMT-TZ requires a minimum 1 μF ceramic input capacitor from VIN to GND, placed as close as possible to the pins. X5R or X7R dielectrics are recommended; Y5V is not advised due to severe capacitance loss over temperature. This capacitor stabilizes the regulator under fast line transients and filters high-frequency noise from upstream supplies-omitting it risks oscillation or degraded PSRR performance.

How does the enable pin (EN) function on MIC5317-3.0YMT-TZ?

The EN pin on MIC5317-3.0YMT-TZ is active-high: output enables when EN ≥ 1.2 V and disables when EN ≤ 0.2 V. In shutdown, MIC5317-3.0YMT-TZ draws only 0.05 μA, entering near-zero off-mode current. The pin must never be left floating-it requires a pull-down resistor (e.g., 100 kΩ to GND) or controlled GPIO. Floating EN causes indeterminate output states and potential shoot-through in multi-rail systems.

Can MIC5317-3.0YMT-TZ be used in RF transmitter circuits?

No, MIC5317-3.0YMT-TZ is explicitly not suitable for RF transmitter systems per Microchip's DS20006195B-page 4. While it offers excellent PSRR and low noise for receiver/analog front-ends, its internal architecture lacks the isolation and transient response needed for high-power RF PA biasing. Use dedicated RF LDOs (e.g., MIC5333) or DC/DC converters with RF-grade filtering for transmitter supply rails.

What is the thermal resistance (θJA) of MIC5317-3.0YMT-TZ in its UDFN package?

The junction-to-ambient thermal resistance (θJA) of MIC5317-3.0YMT-TZ in the 1 mm × 1 mm UDFN-4 (MT) package is 240°C/W under standard JEDEC PCB conditions (2-layer, 1 oz Cu, 1 in² copper area). With proper ePAD grounding and ≥4 thermal vias, actual θJA can improve to ~120°C/W. At 150 mA and 3.6 V input → 3.0 V output, power dissipation is 90 mW-so junction temperature rise is ~21.6°C above ambient, well within the –40°C to +125°C operating range.