MIC5206-3.0YM5-TR - 150mA 3.0V Fixed LDO | Microchip Technology
MPN: MIC5206-3.0YM5-TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.89 | $0.89 |
| 10 | $0.76 | $7.60 |
| 100 | $0.62 | $62.00 |
| 500 | $0.48 | $240.00 |
| 1,000 | $0.41 | $410.00 |
| 3,000 | $0.35 | $1,050.00 |
MIC5206-3.0YM5-TR Overview
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage, eliminating the need for a step-down switching pre-converter in many low-headroom applications. In the broader system hierarchy, the LDO sits inside the linear regulator class, which itself belongs to the voltage regulator family and ultimately the power management IC (PMIC) category. LDOs are favored over switching converters where low noise, small board area, and fast transient response outweigh efficiency concerns.
Key features of the MIC5206-3.0YM5-TR include very low ground current, a logic-compatible active-high enable/shutdown input, an internal undervoltage monitor, thermal shutdown, and current-limit protection. The device requires only 1 µF of output capacitance for stability when the ESR is in the recommended range, simplifying BOM and layout. The SOT-23-5 footprint exposes a tab tied to ground for improved thermal dissipation in a compact package.
Architecturally, the MIC5206 uses a PNP pass transistor topology, which gives it the low-dropout characteristic that older NPN regulators could not achieve. The reference, error amplifier, and feedback network are trimmed at the factory to deliver better than 1 % initial accuracy on the fixed -3.0 V output code, and a flag output indicates an undervoltage condition for system monitoring.
Typical applications include powering microcontroller core rails, real-time-clock (RTC) backup supplies, post-regulation after a switching converter, USB peripheral power, and battery-powered handheld electronics. The enable pin allows the host microcontroller to shut the regulator down for sleep-mode current savings, while the undervoltage flag supplies reset signaling. Compared with a buck converter, the MIC5206-3.0YM5-TR adds no switching noise to the rail but does dissipate (VIN - 3.0 V) × IOUT as heat, so reserve thermal headroom in the layout.
When designing with this part, place the input/output 1 µF ceramic capacitors as close as possible to the IN and OUT pins and ensure the enable pin is driven by a logic-level source, not left floating. The datasheet also recommends keeping the junction temperature below 125 °C for reliable long-term operation, which usually requires less than ~250 mW dissipation in the SOT-23-5 footprint on a standard 1 oz copper 2-layer board.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, with citations back to the original Microchip datasheet and current distributor listings as of 2026-10-16.
Drop-in alternatives for MIC5206-3.0YM5-TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MIC5206-3.0BM5-TR
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MIC5206-3.2YM5-TR
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MIC5206-2.8YM5-TR
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MIC5206-3.0YS-TR
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LP2980AIM5-3.0/NOPB
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LP2985AIM5-3.0/NOPB
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MIC5206-3.0YM5-TR Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Product Type | LDO (Low-Dropout) Linear Voltage Regulator |
| Output Configuration | Positive, Fixed |
| Output Voltage | 3.0 V |
| Output Current (Maximum) | 150 mA |
| Input Voltage (Maximum) | 16 V |
| Dropout Voltage (Typical at Light Load) | 17 mV |
| Dropout Voltage (Typical at 150 mA) | 165 mV |
| Ground Current (Typical at 100 mA) | 600 µA |
| Initial Output Voltage Accuracy | ±1 % |
| Enable Input | Logic-compatible, active-high |
| Undervoltage Flag Output | Yes (open-drain or push-pull per datasheet figure) |
| Thermal Shutdown | Yes (internal) |
| Current Limit | Yes (internal) |
| Output Capacitor Requirement | 1 µF minimum for stability (low-ESR ceramic acceptable) |
| Operating Temperature Range | -40 °C to +125 °C |
| Package | SOT-23-5 |
| Mounting Type | Surface Mount |
| Lead Free / RoHS Status | Lead Free / RoHS Compliant (per distributor data) |
| Packing Quantity | 3,000 per reel (TR suffix) |
| Pin Count | 5 |
MIC5206-3.0YM5-TR Pin Configuration
| Pin 1 | IN — Input supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Enable (active-high logic input) |
| Pin 4 | FLAG/BYP — Undervoltage flag output / reference bypass pin (per datasheet) |
| Pin 5 | OUT — Regulated 3.0 V output |
Typical Applications
MIC5206-3.0YM5-TR is suitable for 6 applications: Battery-Powered Handheld Electronics, Microcontroller Core Rail (MCU / SoC), Post-Regulation After Switching Converter, USB Peripheral Power Rail, Real-Time-Clock (RTC) Backup Supply, Industrial Sensor Conditioning.
Battery-Powered Handheld Electronics
The MIC5206-3.0YM5-TR is well suited to single-cell Li-ion handheld devices where a regulated 3.0 V rail must be derived from a 3.6 V nominal battery. Its 17 mV typical dropout at light load and 165 mV at full 150 mA load extends usable battery life below 3.2 V, while 600 µA ground current preserves standby run-time. The shutdown/enable pin lets a microcontroller cut quiescent current in deep-sleep modes, and the undervoltage flag signals the host when VIN collapses.
Recommended
Microcontroller Core Rail (MCU / SoC)
A regulated 3.0 V rail supplies many low-power ARM Cortex-M and similar MCUs whose core prefers 3.0 V over 3.3 V for power-consumption reasons. The MIC5206-3.0YM5-TR delivers 150 mA with ±1 % accuracy, sufficient for the MCU core plus small analog blocks. The factory-trimmed output eliminates external feedback resistors, saving BOM cost and board space in space-constrained designs.
Recommended
Post-Regulation After Switching Converter
Placed downstream of a buck or boost switching regulator, the MIC5206-3.0YM5-TR cleans residual switching ripple on a 3.0 V sensitive analog rail. Its high PSRR at low frequencies and the optional reference-bypass capacitor reduce output noise to microvolt levels. The 150 mA rating covers typical post-regulator loads such as RF transceivers, audio codecs, or precision sensors, while the 1 µF output cap requirement simplifies the output filter.
Recommended
USB Peripheral Power Rail
USB peripherals powered from the 5 V VBUS rail can use the MIC5206-3.0YM5-TR to derive a clean 3.0 V logic rail with 150 mA capacity. Its 16 V absolute-maximum input tolerates USB bus transients, and the internal current limit protects against downstream shorts on the 3.0 V rail. The shutdown pin enables USB suspend current compliance by gating the regulator.
Recommended
Real-Time-Clock (RTC) Backup Supply
The MIC5206-3.0YM5-TR can power an RTC chip or coin-cell-replacement backup domain from a 3.6 V Li-ion primary. With 600 µA quiescent current and high-accuracy ±1 % output, it preserves timekeeping while drawing minimal power. The undervoltage flag gives the host an early warning when the Li-ion cell approaches end-of-discharge, allowing graceful shutdown.
Recommended
Industrial Sensor Conditioning
Many industrial sensor signal chains need a quiet 3.0 V supply for op-amps, transducers, and low-level signal conditioning. The MIC5206-3.0YM5-TR provides that rail from a 5 V or 12 V industrial bus with low noise, 16 V max input tolerance, and ±1 % accuracy. The -40 °C to +125 °C operating range covers industrial temperature classes. The thermal shutdown and current-limit features protect the sensor chain against fault conditions.
Recommended
Recommended Products Summary
Engineering reference data for MIC5206-3.0YM5-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MIC5206-3.0BM5-TR | MIC5206-3.3YM5-TR | MIC5206-2.8YM5-TR | LP2980AIM5-3.0/NOPB | LP2985AIM5-3.0/NOPB |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments | Texas Instruments |
| Package | SOT-23-5 | SOT-23-5 (same) | SOT-23-5 (same) | SOT-23-5 (same) | SOT-23-5 (same) | SOT-23-5 (same) |
| Output Voltage | 3.0 V | 3.0 V | 3.3 V (+10%) | 2.8 V (-6.7%) | 3.0 V | 3.0 V |
| Output Current | 150 mA | 150 mA | 150 mA | 150 mA | 50 mA | 150 mA |
| Dropout Voltage (typ @ full load) | 165 mV | 165 mV | 165 mV | 165 mV | 180 mV (typ) | 280 mV (typ) |
| Initial Accuracy | ±1 % | ±1 % | ±1 % | ±1 % | ±0.5 % to ±2 % | ±1 % |
| Enable Pin Polarity | Active-High | Active-High | Active-High | Active-High | Active-Low | Active-High |
| Undervoltage Flag | Yes | Yes | Yes | Yes | No (no flag) | No (no flag) |
| Input Voltage (Max) | 16 V | 16 V | 16 V | 16 V | 16 V | 16 V |
Key Differentiators
- Undervoltage flag output integrated (vs LP2980AIM5-3.0/NOPB)
- Lower quiescent current at moderate load (vs LP2985AIM5-3.0/NOPB)
- Wide fixed-voltage code family footprint-compatible (vs MIC5206-3.0BM5-TR)
Design Notes
Place the 1 µF input and output ceramic capacitors within 1-2 mm of the IN and OUT pins with wide, short traces to minimize parasitic inductance. Use X5R or X7R dielectric ceramic capacitors rated for at least 10 V to handle input transients. The exposed SOT-23-5 tab is internally tied to ground; solder it to a copper pour to spread heat and to provide a low-impedance ground return for the regulator.
Estimated: at VIN=5 V, VOUT=3.0 V, IOUT=150 mA, power dissipation is (5 - 3.0) × 0.150 ≈ 0.30 W. With a SOT-23-5 θJA of approximately 200-250 °C/W on a 1 oz 2-layer board, junction temperature rise is roughly 60-75 °C above ambient, well inside the 125 °C junction limit. For ambient operation up to 70 °C this is comfortable; at 5 V VIN and 150 mA continuous, derate or reduce VIN before pushing to the 85 °C industrial envelope.
Do not leave the EN pin floating - either tie it to IN through a 100 kΩ pull-up or drive it with a logic level. Do not exceed 16 V on IN even in transient; the absolute-maximum rating is firm. Avoid operating at VIN = VOUT for extended periods, which forces the internal pass device into dropout and increases power dissipation. If replacing a competitor part, verify the flag pin (pin 4) function matches: MIC5206 uses an undervoltage FLAG output, whereas LP2980 leaves this pin as error-amp compensation.
The undervoltage flag output indicates when VOUT drops below ~93 % of nominal, useful for reset generation or system power-good signaling. Tie the flag pin to a logic-level pull-up resistor (typically 100 kΩ) to a voltage at or below the regulator input. The flag pin doubles as the reference-bypass terminal in some datasheet figures; consult the official Microchip MIC5206 datasheet for clarification when designing low-noise analog supplies.
Compliance Information
RoHS/Lead-Free confirmed per DigChip distributor data; REACH compliance inferred from Microchip corporate policy; AEC-Q100 qualification not applicable to this fixed-output SOT-23-5 LDO - the MIC5206 family is commercial/industrial grade.
