My Inquiry
My Account
Microchip Technology MIC5255-3.5YM5 TR
- Part No.:
- MIC5255-3.5YM5 TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC5255-3.5YM5 TR.pdf
- Description:
- IC REG LINEAR 3.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,772
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC5255-3.5YM5 TR from Micrel is a 3.5V fixed-output, 150mA ultra-low-noise CMOS LDO regulator in SOT-23-5 package, featuring 135mV dropout at full load, 30µV(rms) output noise, and TTL-compatible enable control - designed for RF-sensitive battery-powered systems such as cellular accessories and portable computing.
For engineers reviewing the MIC5255-3.5YM5 TR datasheet, MIC5255-3.5YM5 TR pinout, MIC5255-3.5YM5 TR application, or MIC5255-3.5YM5 TR equivalent, key selection criteria include low-noise performance with bypass capacitor support, zero-off-mode current during shutdown, stability with 1µF ceramic output capacitors, and thermal shutdown protection at 150°C.
Technical Context
The MIC5255-3.5YM5 TR uses a CMOS pass element with active-clamp shutdown to discharge output capacitance rapidly. Its reference bypass (BYP) pin enables external 0.01µF–1.0µF capacitor connection to reduce internal reference noise, directly lowering output voltage noise to 30µV(rms).
It operates across 2.7V–6.0V input range with ±1% initial output accuracy and maintains regulation down to zero load. Line regulation is 0.02%/V and load regulation is 1.5% over 0.1mA–150mA, supported by internal current limit (160–425mA) and thermal shutdown with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.5V ±1% initial accuracy ensures stable supply for 3.3V–3.6V logic rails without external feedback. |
| Dropout Voltage | 135mV at 150mA enables operation from single-cell Li-ion (3.4V min) or dual-cell alkaline (3.6V min) inputs. |
| Output Noise | 30µV(rms), 10Hz–100kHz, with 0.01µF BYP capacitor - suitable for RF transceivers and precision analog circuitry. |
| Quiescent Current | 90µA typical at 150mA load; drops to 0.2µA in shutdown - extends battery life in always-on standby modes. |
| Enable Logic | TTL-compatible EN pin (VIH ≥ 1.6V, VIL ≤ 0.4V) allows direct microcontroller GPIO control without level-shifting. |
| Stability | Guaranteed stable with ≥1.0µF low-ESR ceramic output capacitor (X7R/X5R); no electrolytic or tantalum required. |
| Thermal Protection | Activates at 150°C junction temperature with 10°C hysteresis - prevents damage during sustained overload or poor PCB thermal layout. |
Pinout & Package
Package: 5-pin SOT-23 (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 DC input; requires 1µF ceramic bypass to GND for stability and noise suppression. |
| 2 - GND | Ground Reference | Primary return path for load current and quiescent current; must be low-impedance connection to system ground plane. |
| 3 - EN | Enable/Shutdown Input | Active-high TTL-compatible control; drives output ON when ≥1.6V, OFF when ≤0.4V; must not be left floating. |
| 4 - BYP | Noise Bypass Terminal | Connects to internal reference; 0.01µF capacitor to GND reduces output noise by >20dB at 10kHz–100kHz. |
| 5 - OUT | Regulated Output | Delivers 3.5V ±1% at up to 150mA; stable with ≥1µF ceramic capacitor; supports fast transient load steps. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Output Noise | 30µV(rms) with 0.01µF BYP cap - enables clean power for VCOs, PLLs, and ADC references in RF front-ends. |
| Zero Off-Mode Current | 0.2µA shutdown current - eliminates battery drain in powered-down states of handheld devices. |
| Fast Active Shutdown Clamp | Internal N-MOSFET discharges output capacitor on disable - prevents residual voltage hold-up on sensitive downstream circuitry. |
| Ceramic Capacitor Stability | Stable with 1µF X7R/X5R ceramics (ESR ≤300mΩ) - eliminates need for larger, less reliable electrolytic capacitors. |
| Tight Load Regulation | 1.5% variation from 0.1mA to 150mA load - maintains voltage integrity across sleep-to-active transitions in portable SoCs. |
Applications
| Cellular Accessories | Portable Computing |
|---|---|
Use Scenario: USB-powered Bluetooth headsets and LTE hotspots requiring clean 3.5V rail for RF ICs and audio codecs. IC Role / Device Role / Timing Role: Primary low-noise power source for RF transceiver and baseband processor I/O supply. Use Value: 30µV(rms) noise and 135mV dropout allow direct Li-ion battery input while preserving SNR in 2.4GHz/5GHz radios. | Use Scenario: Sub-1W embedded controllers in industrial tablets and ruggedized palmtops needing regulated 3.5V for memory and interface ICs. IC Role / Device Role / Timing Role: Standby power regulator enabling instant wake-from-sleep via TTL-enable signal from host MCU. Use Value: 90µA quiescent current and zero-off-mode shutdown extend battery runtime beyond 72 hours in deep-sleep mode. |
| RF Sensor Modules | Medical Wearables |
Use Scenario: Compact LoRaWAN or NB-IoT sensor nodes powered by coin cells or small LiPo batteries. IC Role / Device Role / Timing Role: Low-noise bias supply for RF front-end amplifiers and crystal oscillator circuits. Use Value: BYP pin support and 30µV noise meet ETSI/EN300-220 spectral purity requirements for sub-GHz ISM band transmission. | Use Scenario: Continuous glucose monitors and pulse oximeters where EMI-sensitive analog front-ends require ultra-clean power. IC Role / Device Role / Timing Role: Precision voltage source for op-amps, ADC references, and optical sensor biasing. Use Value: ±1% output accuracy and no-load stability ensure consistent analog measurement accuracy across battery discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2035PDQNR | 3.5V fixed, 300mA rating, 165mV dropout @ 300mA, 7µV(rms) noise, requires 0.1µF min COUT. | Higher current capacity and lower noise, but larger 1.2mm × 1.6mm DQN package and tighter layout constraints. | Select when >150mA load or <10µV noise is required; verify PCB footprint compatibility. |
| MCP1703T-3502E/MB | 3.5V fixed, 250mA rating, 600mV dropout @ 250mA, 35µV(rms) noise, stable with 1µF ceramic. | Higher dropout limits usable input range; slightly higher noise; same SOT-23-5 footprint and pinout. | Select when cost sensitivity outweighs ultra-low-noise requirement and input headroom >600mV is available. |
Compared with TPS7A2035PDQNR and MCP1703T-3502E/MB, the MIC5255-3.5YM5 TR delivers optimal balance of ultra-low noise, minimal dropout, and proven SOT-23-5 reliability in space-constrained RF designs - especially where BYP-capacitor tuning and zero-off-mode shutdown are critical.
Availability
MIC5255-3.5YM5 TR is available at Aetrix Electronics and suitable for cellular accessories, portable computing, and RF sensor modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MIC5255-3.5YM5 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 developed for ultra-low-noise, low-quiescent-current LDO regulation in battery-powered RF and portable electronics - emphasizing ceramic capacitor compatibility and rapid enable/disable response.
FAQ
What is the maximum input voltage for MIC5255-3.5YM5 TR?
The absolute maximum input voltage for MIC5255-3.5YM5 TR is +7V, but the recommended operating range is +2.7V to +6.0V. Exceeding 6.0V risks violating safe operating area limits even if within absolute max ratings. For 3.5V output, maximum practical input is ~5.4V at 150mA load in standard SOT-23-5 layout due to thermal limits - verified per Micrel's thermal calculation methodology in the datasheet.
Does MIC5255-3.5YM5 TR require an external bypass capacitor on the BYP pin?
MIC5255-3.5YM5 TR does not require the BYP capacitor to function, but it is essential to achieve the specified 30µV(rms) output noise. Without it, noise rises significantly - typically >100µV(rms). A 0.01µF ceramic capacitor (X7R/NPO) to GND is recommended; values up to 1.0µF further reduce noise but slightly increase turn-on time.
Is MIC5255-3.5YM5 TR pin-compatible with other MIC5255 variants in SOT-23-5?
Yes, all MIC5255-x.xYM5 and MIC5255-x.xBM5 variants share identical 5-pin SOT-23-5 pinout (IN, GND, EN, BYP, OUT), same footprint, and compatible thermal characteristics. Only the marked output voltage differs - allowing drop-in replacement across 2.5V–3.5V versions without PCB changes.
Can MIC5255-3.5YM5 TR operate with zero load current?
Yes, MIC5255-3.5YM5 TR remains stable and in regulation with zero load current - a key feature for CMOS RAM keep-alive and real-time clock backup applications. Ground current stays at ~90µA regardless of load, and no minimum load resistor is required for stability.
What is the thermal resistance (θJA) of MIC5255-3.5YM5 TR in standard PCB layout?
The junction-to-ambient thermal resistance (θJA) for MIC5255-3.5YM5 TR in a standard SOT-23-5 layout with minimum copper footprint is 235°C/W, per Micrel's datasheet Table 1. With 1"² copper pour, θJA improves to 185°C/W. This defines maximum allowable power dissipation: PD(max) = (125°C − TA)/θJA - critical for 150mA operation at elevated ambient temperatures.
MIC5255-3.5YM5 TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.5V
- 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
MIC5255-3.5YM5 TR FAQ
1.How can I place an order for MIC5255-3.5YM5 TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5255-3.5YM5 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 MIC5255-3.5YM5 TR reliable?
The price and inventory of MIC5255-3.5YM5 TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5255-3.5YM5 TR is usually 5 days.
3.What payment methods are accepted for MIC5255-3.5YM5 TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5255-3.5YM5 TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5255-3.5YM5 TR?
MIC5255-3.5YM5 TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5255-3.5YM5 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 MIC5255-3.5YM5 TR?
For technical support, including MIC5255-3.5YM5 TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5255-3.5YM5 TR requirements.
6.How does Aetrix verify that MIC5255-3.5YM5 TR is sourced from the original manufacturer or authorized distributors?
All MIC5255-3.5YM5 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 MIC5255-3.5YM5 TR meets industry standards.
7.What is the process for return or replacement of MIC5255-3.5YM5 TR?
All MIC5255-3.5YM5 TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5255-3.5YM5 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 MIC5255-3.5YM5 TR part is unused and in its original packaging.
Return procedure for MIC5255-3.5YM5 TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC5255-3.5YM5 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…
