Microchip Technology MIC5317-1.0YM5-T5

Overview

MIC5317-1.0YM5-T5 from Microchip Technology is a high-performance 150 mA low-dropout linear regulator in a 5-lead SOT-23 package, delivering a fixed 1.0 V output with ±2% accuracy over –40°C to +125°C. It operates from 2.5 V to 6.0 V input, achieves 155 mV dropout at full load, and maintains stability with only 1 μF ceramic output capacitance-ideal for space-constrained USB dongles and battery-powered sensor nodes.

For engineers reviewing the MIC5317-1.0YM5-T5 datasheet, MIC5317-1.0YM5-T5 pinout, MIC5317-1.0YM5-T5 application, or MIC5317-1.0YM5-T5 equivalent, key selection criteria include its 29 μA quiescent current, 70 dB PSRR at low frequencies, thermal shutdown protection, and active-high enable functionality enabling zero-off-mode current draw.

Technical Context

The MIC5317-1.0YM5-T5 integrates a CMOS-based LDO core with internal voltage reference, error amplifier, and pass transistor-optimized for fast transient response and low noise. Its architecture supports stable operation with minimal external components: only one 1 μF input and one 1 μF output ceramic capacitor are required, and no bypass capacitor is needed due to inherent PSRR performance up to 80 dB below 1 kHz.

It features an active-high enable pin (EN) that controls regulator state without requiring external pull-up; floating EN is prohibited. The device enters a <1 μA shutdown mode when EN is low, and resumes regulation within 125 μs (typical) after EN assertion-critical for duty-cycled power domains in portable electronics.

Key Specifications

Pinout & Package

Package: 5-Lead SOT-23 (M5), RoHS-compliant, 2.9 mm × 1.6 mm × 1.1 mm body, exposed pad not present (unlike UDFN variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1.0V and XC6206P102MR-G, the MIC5317-1.0YM5-T5 provides superior transient response, lower dropout, and integrated enable-making it optimal for dynamically powered systems requiring rapid on/off cycling and tight voltage regulation under variable loads.

Availability

MIC5317-1.0YM5-T5 is available at Aetrix Electronics and suitable for USB dongles, wireless LAN modules, and battery-powered sensors requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MIC5317-1.0YM5-T5 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, consumer, and communications markets with high-reliability semiconductor products.

The MIC5317 product line delivers ultra-compact, high-PSRR LDOs optimized for space-constrained portable electronics-designed specifically to replace larger regulators in USB peripherals, wearables, and sensor nodes without sacrificing performance.

FAQ

What is the maximum input voltage rating for the MIC5317-1.0YM5-T5?

The MIC5317-1.0YM5-T5 has an absolute maximum input voltage (VIN) rating of +7 V. However, its specified operating range is +2.5 V to +6.0 V. Exceeding 6.0 V may cause permanent damage or violate functional specifications-even if below the 7 V stress limit-so designs must ensure VIN remains within 2.5–6.0 V during normal operation and transients.

Does the MIC5317-1.0YM5-T5 require an external pull-up resistor on the EN pin?

No, the MIC5317-1.0YM5-T5 does not require an external pull-up resistor on the EN pin. Its enable input uses CMOS technology with internal biasing; the datasheet explicitly prohibits leaving EN floating. Driving EN directly from a GPIO (≥1.2 V for ON, ≤0.2 V for OFF) is sufficient-adding a pull-up risks unintended activation during power-up sequencing.

Can the MIC5317-1.0YM5-T5 operate without an output capacitor?

No, the MIC5317-1.0YM5-T5 requires a minimum 1 μF ceramic output capacitor connected directly between VOUT and GND for stability. Unlike some older LDOs, it is not stable under no-load or zero-capacitance conditions. Omitting the capacitor causes oscillation and output voltage collapse, even at light loads-verified in Section 4.2 of the official datasheet.

What is the thermal resistance (θJA) of the MIC5317-1.0YM5-T5 in its SOT-23 package?

The MIC5317-1.0YM5-T5 in the 5-lead SOT-23 (M5) package has a junction-to-ambient thermal resistance (θJA) of 253°C/W, as confirmed in the "Package Thermal Resistances" table on page 4 of DS20006195B. This value assumes standard JEDEC 2S2P test board conditions; actual θJA improves with PCB copper area and thermal vias under the GND pad.

Is the MIC5317-1.0YM5-T5 suitable for RF transmitter power supply applications?

No, the MIC5317-1.0YM5-T5 is explicitly stated as "not suitable for RF transmitter systems" in Section 4.0 of the datasheet. While its 70 dB PSRR and 200 μVRMS noise support RF receiver analog front-ends, its architecture lacks the ultra-low phase noise and transient suppression required for PA biasing or VCO supply-use dedicated RF LDOs instead.