Microchip Technology MIC5317-2.8YM5-T5

Overview

MIC5317-2.8YM5-T5 from Microchip Technology is a high-performance 150 mA low-dropout linear regulator delivering a fixed 2.8 V output with ±2% initial accuracy, 155 mV dropout at full load, and 29 μA quiescent current. It operates across 2.5 V to 6.0 V input, supports 1 μF ceramic output capacitors, and features active-high enable control - ideal for space-constrained USB dongles and battery-powered digital cameras.

For engineers reviewing the MIC5317-2.8YM5-T5 datasheet, MIC5317-2.8YM5-T5 pinout, MIC5317-2.8YM5-T5 application, or MIC5317-2.8YM5-T5 equivalent, this page delivers verified package mapping (SOT23-5), thermal performance data (θJA = 253°C/W), PSRR (70 dB @ 1 kHz), shutdown current (<1 μA), and real-world transient response metrics - all confirmed for the exact -2.8YM5 variant.

Technical Context

The MIC5317-2.8YM5-T5 implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, and pass transistor - optimized for ultra-low ground current and fast load/line transient recovery. Its enable logic uses CMOS-level thresholds (VIH ≥ 1.2 V, VIL ≤ 0.2 V) and requires external pull-down or controlled drive to prevent floating states.

Thermal protection engages at +150°C junction temperature, and current limiting activates at 200–550 mA depending on input voltage. The device remains stable with no load and supports operation from –40°C to +125°C junction temperature, validated for use in PC laptops and wireless LAN modules where compact footprint and low noise are critical.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2802E/TO and XC6206P282MR-G, MIC5317-2.8YM5-T5 uniquely combines –40°C to +125°C guaranteed accuracy, lowest dropout in its class, and integrated enable - making it optimal for thermally demanding, space-constrained applications where precision and efficiency intersect.

Availability

MIC5317-2.8YM5-T5 is available at Aetrix Electronics and suitable for USB dongles, wireless LAN modules, and digital still cameras requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MIC5317-2.8YM5-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, analog, FPGA, and power management semiconductors, with emphasis on embedded control and reliability-critical applications.

The MIC5317 product line delivers ultra-compact, high-PSRR LDOs targeting portable and battery-powered systems where board area, quiescent current, and noise performance are design-defining parameters.

FAQ

What is the maximum input voltage rating for MIC5317-2.8YM5-T5?

The absolute maximum input voltage for MIC5317-2.8YM5-T5 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. For sustained operation, maintain VIN ≤ 6.0 V - this ensures compliance with the 155 mV dropout specification and avoids overstressing the internal pass element in MIC5317-2.8YM5-T5.

Does MIC5317-2.8YM5-T5 require an external pull-up resistor on the EN pin?

No, MIC5317-2.8YM5-T5 does not require an external pull-up on EN. Its enable input has CMOS-compatible thresholds (VIH ≥ 1.2 V, VIL ≤ 0.2 V) and negligible input current (<1 μA). A direct GPIO connection is sufficient. However, if the driving source can float, a weak pull-down (e.g., 1 MΩ to GND) is recommended to guarantee OFF-state behavior - critical for predictable power sequencing in MIC5317-2.8YM5-T5 deployments.

Can MIC5317-2.8YM5-T5 be used with tantalum output capacitors?

No - MIC5317-2.8YM5-T5 is optimized for low-ESR ceramic capacitors (X5R/X7R, ≥1 μF) and is not stable with high-ESR types like tantalum. Using tantalum capacitors risks high-frequency oscillation due to insufficient phase margin. The datasheet explicitly recommends against high-ESR outputs. For MIC5317-2.8YM5-T5, always use 1 μF X5R/X7R ceramics placed within 2 mm of VOUT and GND pins to ensure stability across –40°C to +125°C.

What is the thermal resistance (θJA) of MIC5317-2.8YM5-T5 in its SOT23-5 package?

The junction-to-ambient thermal resistance (θJA) for MIC5317-2.8YM5-T5 in the SOT23-5 (M5) package is 253°C/W, per Microchip's DS20006195B datasheet. This value assumes standard JEDEC 2-layer board conditions. Actual θJA improves with PCB copper area and thermal vias under the GND pad. At 150 mA load and 3.6 V input, MIC5317-2.8YM5-T5 dissipates ~120 mW - resulting in ~30°C rise above ambient under nominal layout, well within the +125°C max junction limit.

Is MIC5317-2.8YM5-T5 suitable for RF transmitter power supply applications?

No - the MIC5317-2.8YM5-T5 datasheet explicitly states it is "not suitable for RF transmitter systems." While it offers high PSRR (70 dB @ 1 kHz) and low noise (200 μV_RMS), its bandwidth and transient response are not characterized for RF PA biasing. Use dedicated RF LDOs (e.g., MIC5270) for transmitter stages. MIC5317-2.8YM5-T5 is validated for RF receiver I/O, baseband logic, and sensor analog supplies - not high-dynamic-range RF power paths.