My Inquiry
My Account
Microchip Technology MIC5255-3.2YM5-TR
- Part No.:
- MIC5255-3.2YM5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC5255-3.2YM5-TR.pdf
- Description:
- IC REG LINEAR 3.2V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,391
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC5255-3.2YM5-TR from Micrel is a 150mA, 3.2V fixed-output CMOS low-dropout linear regulator in SOT-23-5 package, delivering 1% initial accuracy, 135mV dropout at full load, and ultra-low 30µV(rms) output noise - optimized for RF power rails in battery-powered handheld devices.
For engineers reviewing the MIC5255-3.2YM5-TR datasheet, MIC5255-3.2YM5-TR pinout, MIC5255-3.2YM5-TR application, or MIC5255-3.2YM5-TR equivalent, key selection criteria include noise-sensitive analog/RF supply requirements, TTL-compatible enable control, ceramic capacitor stability, thermal performance in compact layouts, and shutdown current <1µA.
Technical Context
The MIC5255-3.2YM5-TR uses a CMOS pass element with internal reference bypass (BYP pin) to achieve 30µV(rms) noise and 60dB PSRR at 10Hz–10kHz. Its active-clamp shutdown discharges the output during disable, supporting fast system-level power sequencing.
It operates across 2.7V–6.0V input, maintains regulation down to 135mV VIN–VOUT differential at 150mA, and sustains stability with ≥1µF low-ESR ceramic output capacitors - eliminating need for tantalum or electrolytic types in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.2V ±1% initial accuracy ensures precise biasing for 3.3V-tolerant RF ICs and low-voltage microcontrollers. |
| Dropout Voltage | 135mV at 150mA enables operation from single-cell Li-ion (3.0V min) or dual-cell alkaline (3.2V typical) without brownout. |
| Output Noise | 30µV(rms), 10Hz–100kHz, with 0.01µF BYP capacitor - critical for VCOs, PLLs, and ADC reference supplies. |
| Quiescent Current | 90µA typical at full load; <1µA in shutdown - extends battery life in always-on sensor nodes and standby modes. |
| Enable Logic | TTL-compatible EN pin (VIH ≥1.6V, VIL ≤0.4V) allows direct interfacing with 1.8V/3.3V GPIO without level shifters. |
| Thermal Protection | 150°C junction shutdown with 10°C hysteresis prevents thermal runaway in sealed enclosures or high-ambient environments. |
| Capacitor Support | Stable with ≥1µF ceramic COUT (X7R/X5R); no ESR requirement - reduces BOM count and PCB area vs. legacy LDOs. |
Pinout & Package
Package: 5-pin SOT-23-5 (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm body height, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Supply Input | Accepts 2.7V–6.0V unregulated input; requires 1µF ceramic bypass to GND for stability. |
| 2 - GND | Ground Reference | Primary return path for load, quiescent, and enable currents; must connect to low-impedance ground plane. |
| 3 - EN | Enable/Shutdown Input | Active-high TTL logic; drives regulator ON when ≥1.6V, OFF when ≤0.4V; must not float. |
| 4 - BYP | Noise Reference Bypass | Connects external 0.01µF–1.0µF capacitor to GND to reduce output voltage noise by up to 20dB. |
| 5 - OUT | Regulated Output | Delivers stable 3.2V ±1% to load; supports ≥1µF ceramic output capacitance for transient response and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Noise Regulation | 30µV(rms) output noise with 0.01µF BYP cap enables clean power for VCOs, RF transceivers, and precision ADCs. |
| Active Output Discharge | Integrated N-MOSFET clamp on EN=low rapidly discharges OUT capacitor, preventing floating rail during power-down sequences. |
| Ceramic Capacitor Stability | No minimum ESR required; works with standard 1µF X7R ceramics - eliminates bulkier, higher-ESR alternatives and saves board space. |
| Zero-Current Shutdown | Ground current drops to <1µA when EN=low, making MIC5255-3.2YM5-TR suitable for multi-year battery-powered IoT endpoints. |
| Fast Transient Response | Optimized internal compensation delivers <10µs recovery from 50mA load steps - maintains regulation during burst-mode RF transmission. |
Applications
| Cellular Front-End Power | Low-Power Microcontroller Core Supply |
|---|---|
Use Scenario: Powering RF power amplifier (PA) bias rails and VCO tuning lines in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Ultra-low-noise 3.2V LDO supplying sensitive analog RF circuitry adjacent to noisy digital baseband. Use Value: 30µV(rms) noise prevents phase noise degradation and adjacent-channel leakage in transmit paths. | Use Scenario: Providing core voltage to ARM Cortex-M0+ or RISC-V MCU in wearable health monitors. IC Role / Device Role / Timing Role: Primary 3.2V supply enabling sub-100µA sleep current and fast wake-up via TTL EN pin. Use Value: 90µA quiescent current and <1µA shutdown extend coin-cell life beyond 3 years in continuous-sensing mode. |
| Bluetooth Audio Codec Bias | Portable Medical Sensor Signal Chain |
Use Scenario: Powering DAC, headphone amp, and Bluetooth radio analog sections in true wireless stereo earbuds. IC Role / Device Role / Timing Role: Low-noise, fast-response LDO decoupling mixed-signal audio subsystems from shared battery rail. Use Value: 60dB PSRR at 10kHz suppresses switching noise from DC-DC converters feeding digital baseband. | Use Scenario: Supplying 3.2V to low-noise instrumentation amplifiers and 24-bit sigma-delta ADCs in portable ECG units. IC Role / Device Role / Timing Role: Precision analog supply with 1% initial accuracy and no-load stability for medical-grade signal integrity. Use Value: No-load regulation prevents drift during intermittent sensor sampling, ensuring baseline accuracy per IEC 60601-2-27. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-3202E/MB | 3.2V output, 250mA rating, 170mV dropout, 35µV(rms) noise, SOT-23-5 package. | Higher dropout and noise limit use in tighter input headroom or ultra-low-phase-noise RF designs. | Select when higher output current margin is needed and 35µV noise is acceptable. |
| TLS820B32T1 | 3.2V output, automotive AEC-Q100 qualified, 200mV dropout, 45µV(rms) noise, integrated watchdog timer. | Designed for automotive infotainment; lacks BYP pin for noise optimization and adds complexity for consumer portables. | Select only for automotive-grade designs requiring watchdog supervision and extended temperature range. |
Compared with MCP1703T-3202E/MB and TLS820B32T1, the MIC5255-3.2YM5-TR provides the lowest noise (30µV), smallest dropout (135mV), and dedicated BYP pin - making it optimal for space-constrained, battery-powered RF and precision analog systems where noise and efficiency are primary constraints.
Availability
MIC5255-3.2YM5-TR is available at Aetrix Electronics and suitable for cellular front-end power, portable medical sensor signal chains, Bluetooth audio codec bias, and low-power microcontroller core supply requiring stable component supply across production lifecycles.
Supply support for MIC5255-3.2YM5-TR 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
Micrel Inc. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC5255 family was designed specifically for ultra-low-noise, low-quiescent-current regulation in handheld and battery-powered RF systems - prioritizing noise performance, ceramic capacitor compatibility, and compact packaging.
FAQ
What is the maximum input voltage for MIC5255-3.2YM5-TR?
The absolute maximum input voltage for MIC5255-3.2YM5-TR is +7V, but the recommended operating range is +2.7V to +6.0V. Exceeding 6.0V risks violating absolute maximum ratings and may trigger thermal shutdown or permanent damage. For reliable 3.2V output at 150mA, VIN should remain ≤5.4V in standard SOT-23-5 layouts per thermal calculations in the datasheet.
Does MIC5255-3.2YM5-TR require an external bypass capacitor on the BYP pin?
MIC5255-3.2YM5-TR does not require the BYP pin to be used - it functions correctly with BYP left open. However, connecting a 0.01µF ceramic capacitor from BYP to GND reduces output noise from ~60µV(rms) to 30µV(rms) and improves PSRR by up to 20dB, which is essential for RF and precision analog applications.
Can MIC5255-3.2YM5-TR operate with no load?
Yes, MIC5255-3.2YM5-TR remains stable and in regulation with zero load current - a key differentiator from many older LDOs. This makes it ideal for CMOS RAM keep-alive circuits, real-time clock backup supplies, and sensor nodes that spend extended periods in deep sleep with no active load.
What is the shutdown current of MIC5255-3.2YM5-TR?
The shutdown current of MIC5255-3.2YM5-TR is specified as 0.2µA typical and 1µA maximum when EN ≤ 0.4V. In practice, measured values are often <0.5µA at room temperature, enabling multi-year battery life in always-off configurations such as remote controls or emergency beacons.
Is MIC5255-3.2YM5-TR compatible with X5R ceramic output capacitors?
Yes, MIC5255-3.2YM5-TR is fully compatible with X5R ceramic capacitors for the output stage. The datasheet explicitly recommends X7R or X5R dielectrics due to their stable capacitance over temperature (±15% for X7R, ±22% for X5R). X5R is acceptable where cost or size constraints favor it over X7R, provided minimum 1µF capacitance is maintained across the –40°C to +125°C range.
MIC5255-3.2YM5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB ~ 50dB (10Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MIC5255-3.2YM5-TR FAQ
1.How can I place an order for MIC5255-3.2YM5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5255-3.2YM5-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC5255-3.2YM5-TR reliable?
The price and inventory of MIC5255-3.2YM5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5255-3.2YM5-TR is usually 5 days.
3.What payment methods are accepted for MIC5255-3.2YM5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5255-3.2YM5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5255-3.2YM5-TR?
MIC5255-3.2YM5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5255-3.2YM5-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC5255-3.2YM5-TR?
For technical support, including MIC5255-3.2YM5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5255-3.2YM5-TR requirements.
6.How does Aetrix verify that MIC5255-3.2YM5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5255-3.2YM5-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC5255-3.2YM5-TR meets industry standards.
7.What is the process for return or replacement of MIC5255-3.2YM5-TR?
All MIC5255-3.2YM5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5255-3.2YM5-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC5255-3.2YM5-TR part is unused and in its original packaging.
Return procedure for MIC5255-3.2YM5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5255-3.2YM5-TR Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
